Lincoln Navigator: Body Closures / Body Closures. Diagnosis and Testing

Lincoln Navigator 2018-2024 Workshop Manual / Body and Paint / Body Closures / Body Closures. Diagnosis and Testing

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Module	DTC	Description	Action
BCM	B1306:11	Liftgate Ajar Switch: Circuit Short To Ground	GO to Pinpoint Test R
BCM	B1306:12	Liftgate Ajar Switch: Circuit Short To Battery	GO to Pinpoint Test R
RFA	U201A:55	Control Module Main Calibration Data: Not Configured	GO to Pinpoint Test T
RGTM	B11C4:23	Boot/trunk close button: Signal Stuck Low	GO to Pinpoint Test C
RGTM	B1219:11	Interior Boot/Trunk Release Switch: Circuit Short To Ground	GO to Pinpoint Test C
RGTM	B12E8:11	Liftgate/Tailgate Control/Release Switch: Circuit Short To Ground	GO to Pinpoint Test C
RGTM	B144C:23	Tailgate/Liftgate/Boot/Trunk Outer Handle Switch: Signal Stuck Low	GO to Pinpoint Test C
RGTM	B144D:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 1: Signal Invalid	GO to Pinpoint Test B
RGTM	B144E:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 2: Signal Invalid	GO to Pinpoint Test B
RGTM	B144F:11	Tailgate/Liftgate/Boot/Trunk Driver Motor: Circuit Short To Ground	GO to Pinpoint Test B
RGTM	B144F:12	Tailgate/Liftgate/Boot/Trunk Driver Motor: Circuit Short To Battery	GO to Pinpoint Test B
RGTM	B144F:13	Tailgate/Liftgate/Boot/Trunk Driver Motor: Circuit Open	GO to Pinpoint Test B
RGTM	B144F:79	Tailgate/Liftgate/Boot/Trunk Driver Motor: Mechanical Linkage Failure	GO to Pinpoint Test B
RGTM	B1451:29	Tailgate/Liftgate/Boot/Trunk Latch Centering Position Switch: Signal Invalid	GO to Pinpoint Test K
RGTM	B1452:11	Tailgate/Liftgate/Boot/Trunk Latch Release Actuator: Circuit Short To Ground	GO to Pinpoint Test A
RGTM	B1452:13	Tailgate/Liftgate/Boot/Trunk Latch Release Actuator: Circuit Open	GO to Pinpoint Test A
RGTM	B1453:29	Tailgate/Liftgate/Boot/Trunk Latch Position Switch: Signal Invalid	GO to Pinpoint Test K
RGTM	B1454:11	Tailgate/Liftgate/Boot/Trunk Left Pinch Strip: Circuit Short To Ground	GO to Pinpoint Test G
RGTM	B1454:13	Tailgate/Liftgate/Boot/Trunk Left Pinch Strip: Circuit Open	GO to Pinpoint Test G
RGTM	B1455:11	Tailgate/Liftgate/Boot/Trunk Right Pinch Strip: Circuit Short To Ground	GO to Pinpoint Test G
RGTM	B1455:13	Tailgate/Liftgate/Boot/Trunk Right Pinch Strip: Circuit Open	GO to Pinpoint Test G
RGTM	B145D:11	Tailgate/Liftgate/Boot/Trunk Power Cinch Striker Motor: Circuit Short To Ground	GO to Pinpoint Test B
RGTM	B145D:12	Tailgate/Liftgate/Boot/Trunk Power Cinch Striker Motor: Circuit Short To Battery	GO to Pinpoint Test B
RGTM	B145D:13	Tailgate/Liftgate/Boot/Trunk Power Cinch Striker Motor: Circuit Open	GO to Pinpoint Test B
RGTM	B1495:11	Hands Free Liftgate/Decklid Input Sensor: Circuit Short To Ground	GO to Pinpoint Test J
RGTM	B1515:77	Tailgate/Liftgate/Boot/Trunk: Commanded Position Not Reachable	GO to Pinpoint Test S
RGTM	B1515:78	Tailgate/Liftgate/Boot/Trunk: Alignment Or Adjustment Incorrect	GO to Pinpoint Test D
RGTM	B1515:97	Tailgate/Liftgate/Boot/Trunk: Component Or System Operation Obstructed Or Blocked	GO to Pinpoint Test B
RGTM	B1555:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 4: Signal Invalid	GO to Pinpoint Test B
RGTM	B1556:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 3: Signal Invalid	GO to Pinpoint Test B
RGTM	B1557:11	Power Liftgate/Decklid Driver Motor 2: Circuit Short To Ground	GO to Pinpoint Test B
RGTM	B1557:12	Power Liftgate/Decklid Driver Motor 2: Circuit Short To Battery	GO to Pinpoint Test B
RGTM	B1557:13	Power Liftgate/Decklid Driver Motor 2: Circuit Open	GO to Pinpoint Test B
RGTM	B1584:11	Decklid/Liftglass Release Output: Circuit Short To Ground	GO to Pinpoint Test Q
RGTM	B1584:12	Decklid/Liftglass Release Output: Circuit Short To Battery	GO to Pinpoint Test Q
RGTM	B1584:13	Decklid/Liftglass Release Output: Circuit Open	GO to Pinpoint Test Q
RGTM	B1A59:11	Sensor 5 Volt Supply: Circuit Short To Ground	GO to Pinpoint Test B
RGTM	B1A59:13	Sensor 5 Volt Supply: Circuit Open	GO to Pinpoint Test B
RGTM	U0101:87	Lost Communication with TCM: Missing Message	GO to Pinpoint Test L
RGTM	U0140:87	Lost Communication With Body Control Module: Missing Message	GO to Pinpoint Test M
RGTM	U0294:87	Lost Communication With Powertrain Control Monitor Module: Missing Message	GO to Pinpoint Test N
RGTM	U2300:55	Central Configuration: Not Configured	GO to Pinpoint Test U
RGTM	U2300:56	Central Configuration: Invalid/Incompatible Configuration	GO to Pinpoint Test U
RGTM	U3000:41	Control Module: General Checksum Failure	GO to Pinpoint Test V
RGTM	U3000:49	Control Module: Internal Electronic Failure	GO to Pinpoint Test V
RGTM	U3003:16	Battery Voltage: Circuit Voltage Below Threshold	GO to Pinpoint Test O
RGTM	U3003:17	Battery Voltage: Circuit Voltage Above Threshold	GO to Pinpoint Test P

Global Customer Symptom Code (GCSC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Symptom	Action
Fit/Finish/Body > Body Panels > Liftgate/Hatch > Difficult to Close	GO to Pinpoint Test E
Fit/Finish/Body > Body Panels > Liftgate/Hatch > Difficult to Close	GO to Pinpoint Test H
Fit/Finish/Body > Body Panels > Liftgate/Hatch > Difficult to Open	GO to Pinpoint Test H
Fit/Finish/Body > Body Panels > Liftgate/Hatch > Power Function	GO to Pinpoint Test F
Fit/Finish/Body > Body Panels > Liftgate/Hatch > Power Function	GO to Pinpoint Test I
Lighting/Glass/Vision > Interior Lighting > Luggage Compartment/Cargo Area > Inoperative	GO to Pinpoint Test R
Lighting/Glass/Vision > Interior Lighting > Luggage Compartment/Cargo Area > Control	GO to Pinpoint Test R
Lighting/Glass/Vision > Interior Lighting > Luggage Compartment/Cargo Area > Stays On	GO to Pinpoint Test R

Symptom Chart

Symptom Chart: Power Liftgate

Diagnostics in this manual assume a certain skill level and knowledge of Lincoln-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition	Possible Sources	Actions
The power liftgate does not operate from a RKE transmitter	Refer to the Pinpoint Test	DIAGNOSE the inoperative RKE transmitter button. REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
The power liftgate passive entry feature is inoperative	Refer to the Pinpoint Test	DIAGNOSE the inoperative liftgate passive entry feature. REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
The power liftgate does not unlatch	Refer to the Pinpoint Test	GO to Pinpoint Test A
The liftgate unlatches but the power liftgate is inoperative	Refer to the Pinpoint Test	GO to Pinpoint Test B
The power liftgate is inoperative from one of the power liftgate control switches	Refer to the Pinpoint Test	GO to Pinpoint Test C
The power liftgate stops in the secondary latch position	Refer to the Pinpoint Test	GO to Pinpoint Test D
The power liftgate stops during power open operation	Mechanical binding The vehicle was started or taken out of park during a power open operation	Manually OPERATE the liftgate and CHECK for mechanical binding. If mechanical binding exists, REPAIR as necessary. If no mechanical binding is found, INITIALIZE the power liftgate. REFER to: Power Liftgate Initialization (501-03 Body Closures, General Procedures).
The power liftgate stops and chimes at the full open position	The power liftgate lost its full open position due to a mechanical repair (hinge adjustment, liftgate striker adjustment, liftgate motor adjusted or repaired)	INITIALIZE the power liftgate. REFER to: Power Liftgate Initialization (501-03 Body Closures, General Procedures).
The power liftgate reverses during a power close operation	Refer to the Pinpoint Test	GO to Pinpoint Test E
The power liftgate anti-pinch strip does not stop or reverse the liftgate	Refer to the Pinpoint Test	GO to Pinpoint Test F
The power liftgate does not power close (power open OK)	Refer to the Pinpoint Test	GO to Pinpoint Test G
The power liftgate does not power open (power close OK)	Refer to the Pinpoint Test	GO to Pinpoint Test H
The power liftgate closes (with a continuous chime) immediately after a power open	Refer to the Pinpoint Test	GO to Pinpoint Test I
The power liftgate hands-free actuation is inoperative	Refer to the Pinpoint Test	GO to Pinpoint Test J
The power liftgate has excessive noise during operation	Mechanical binding Liftgate alignment	Manually OPERATE the liftgate and CHECK for mechanical binding. If mechanical binding exists, REPAIR as necessary. If no mechanical binding is found, ALIGN the liftgate. REFER to: Liftgate Alignment (501-03 Body Closures, General Procedures).

Pinpoint Tests

PINPOINT TEST A: THE POWER LIFTGATE DOES NOT UNLATCH

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM B1452:11	Tailgate/Liftgate/Boot/Trunk Latch Release Actuator: Circuit Short To Ground	Sets when the RGTM detects a short to ground from the liftgate latch release actuator output circuit.
RGTM B1452:13	Tailgate/Liftgate/Boot/Trunk Latch Release Actuator: Circuit Open	Sets when the RGTM detects an open from the liftgate latch release actuator output circuit.

Possible Sources

Fuse
Wiring, terminals or connectors
Communication concern
Liftgate Latch
BJB
RGTM

Visual Inspection and Pre-checks

Verify the BJB fuse 91 (30A) is OK

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTICE: The following Pinpoint Test uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or 250- 300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.

A1 CHECK THE LIFTGATE LATCH MANUAL RELEASE

Mechanically unlatch the liftgate.
REFER to: Liftgate Latch Manual Release (501-14 Handles, Locks, Latches and Entry Systems, General Procedures).

Does the liftgate latch release?

Yes

GO to A2

No	INSTALL a new power liftgate latch. REFER to: Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).

A2 CHECK FOR COMMUNICATION TO THE RGTM (REAR GATE TRUNK MODULE)

Ignition ON.

Using a diagnostic scan tool, carry out the network test.

Does the RGTM pass the network test?

Yes

VERIFY the BJB fuse 91 (30A) is OK. If OK, GO to A3
If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

A3 CHECK FOR HIGH CURRENT VOLTAGE TO THE RGTM (REAR GATE TRUNK MODULE)

Ignition OFF.

Disconnect RGTM C4174A .

Connect:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-4 Ground

Does the test lamp illuminate?

Yes

GO to A5

GO to A4

A4 CHECK THE RGTM (REAR GATE TRUNK MODULE) HIGH CURRENT VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Disconnect BJB C1035D .

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-4 C1035D-41

Is the resistance less than 3 ohms?

Yes

INSTALL a new BJB .

No	REPAIR the circuit.

A5 CHECK FOR VOLTAGE TO THE POWER LIFTGATE LATCH RELEASE MOTOR

Connect RGTM C4174A .

Disconnect Power Liftgate Latch C4339A .

Unlock the doors using the door lock control switch.

Connect:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4339A-2 Ground

NOTE: The RGTM only supplies voltage to the actuator momentarily. It is important to monitor the test lamp while pressing the liftgate release switch. While pressing the liftgate release switch, monitor the test lamp.

Does the test lamp momentarily illuminate?

Yes

GO to A6

GO to A7

A6 CHECK THE LIFTGATE LATCH GROUND CIRCUIT FOR AN OPEN

Connect:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4339A-2 C4339A-5

NOTE: The RGTM only supplies voltage to the actuator momentarily. It is important to monitor the test lamp while pressing the liftgate release switch. While pressing the liftgate release switch, monitor the test lamp.

Does the test lamp momentarily illuminate?

Yes

INSTAL a new power liftgate latch.
REFER to: Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).

No	REPAIR the circuit.

A7 CHECK THE RGTM (REAR GATE TRUNK MODULE) LIFTGATE LATCH RELEASE OUTPUT CIRCUIT FOR A SHORT TO GROUND

Disconnect RGTM C4174A .

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-8 Ground

Is the resistance greater than 10,000 ohms?

Yes

GO to A8

No	REPAIR the circuit.

A8 CHECK THE RGTM (REAR GATE TRUNK MODULE) LIFTGATE LATCH RELEASE OUTPUT CIRCUIT FOR AN OPEN

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-8 C4339A-2

Is the resistance less than 3 ohms?

Yes

GO to A9

No	REPAIR the circuit.

A9 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the RGTM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RGTM .
REFER to: Rear Gate Trunk Module (RGTM) (501-03 Body Closures, Removal and Installation).

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST B: THE LIFTGATE UNLATCHES BUT THE POWER LIFTGATE IS INOPERATIVE

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM B144D:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 1: Signal Invalid	Sets when the RGTM receives no signal from the liftgate motor sensor 1 input or the sensor inputs are out of phase.
RGTM B144E:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 2: Signal Invalid	Sets when the RGTM receives no signal from the liftgate motor sensor 2 input or the sensor inputs are out of phase.
RGTM B1556:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 3: Signal Invalid	Sets when the RGTM receives no signal from the liftgate motor sensor 3 input or the sensor inputs are out of phase.
RGTM B1555:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 4: Signal Invalid	Sets when the RGTM receives no signal from the liftgate motor sensor 4 input or the sensor inputs are out of phase.
RGTM B144F:11	Tailgate/Liftgate/Boot/Trunk Driver Motor: Circuit Short To Ground	Sets when the RGTM detects a short to ground from the Left power liftgate motor circuitry.
RGTM B144F:13	Tailgate/Liftgate/Boot/Trunk Driver Motor: Circuit Open	Sets when the RGTM detects a short to voltage from the Left power liftgate motor circuitry.
RGTM B144F:12	Tailgate/Liftgate/Boot/Trunk Driver Motor: Circuit Short To Battery	Sets when the RGTM detects an open from the Left power liftgate motor circuitry.
RGTM B144F:79	Tailgate/Liftgate/Boot/Trunk Driver Motor: Mechanical Linkage Failure	Sets when the RGTM detects the power liftgate requires extra effort to open or the hydraulic strut does not keep the liftgate open.
RGTM B1557:11	Power Liftgate/Decklid Driver Motor 2: Circuit Short To Ground	Sets when the RGTM detects an open from the Right power liftgate motor circuitry.
RGTM B1557:12	Power Liftgate/Decklid Driver Motor 2: Circuit Short To Battery	Sets when the RGTM detects an open from the Right power liftgate motor circuitry.
RGTM B1557:13	Power Liftgate/Decklid Driver Motor 2: Circuit Open	Sets when the RGTM detects an open from the Right power liftgate motor circuitry.
RGTM B1515:97	Tailgate/Liftgate/Boot/Trunk: Component Or System Operation Obstructed Or Blocked	Sets when the RGTM detects the power liftgate requires extra effort to open or the hydraulic strut does not keep the liftgate open.
RGTM B145D:11	Tailgate/Liftgate/Boot/Trunk Power Cinch Striker Motor: Circuit Short To Ground	Sets when the RGTM detects a short to ground from one of the liftgate latch motor circuits.
RGTM B145D:12	Tailgate/Liftgate/Boot/Trunk Power Cinch Striker Motor: Circuit Short To Battery	Sets when the RGTM detects a short to voltage from one of the liftgate latch motor circuits.
RGTM B145D:13	Tailgate/Liftgate/Boot/Trunk Power Cinch Striker Motor: Circuit Open	Sets when the RGTM detects an open from one of the liftgate latch motor circuits.
RGTM B1A59:11	Sensor 5 Volt Supply: Circuit Short To Ground	Sets when the RGTM detects a short to ground from the power liftgate motor sensor voltage supply circuit.
RGTM B1A59:13	Sensor 5 Volt Supply: Circuit Open	Sets when the RGTM detects an open from the power liftgate motor sensor circuitry.

Possible Sources

Wiring, terminals or connectors
Liftgate latch
Power liftgate motor
RGTM

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

B1 CHECK THE OPERATION OF ALL THE POWER LIFTGATE INPUTS

Ignition ON.

Select PARK.

Unlock the doors using the door lock control switch.

Close the liftgate to the full closed position (manually if necessary).

Open and close the power liftgate using the front interior power liftgate switch (located on the instrument panel).

Open and close the power liftgate using a programmed RKE transmitter.

Open the power liftgate using the exterior liftgate release switch.

Close the power liftgate using the rear interior power liftgate switch (located on the bottom of the liftgate trim panel).

Does the power liftgate power open or power close from any input?

Yes

GO to the Symptom Chart and DIAGNOSE the correct symptom.

GO to B2

B2 CHECK FOR COMMUNICATION TO THE RGTM (REAR GATE TRUNK MODULE)

Using a diagnostic scan tool, carry out the network test.

Does the RGTM pass the network test?

Yes

GO to B3

B3 CHECK FOR RGTM (REAR GATE TRUNK MODULE) COMMUNICATION AND VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the RGTM self-test.

Is DTC U0101:87, U0140:87, U0294:87, U3003:16 or U3003:17 present?

Yes

For DTC U0101:87, GO to Pinpoint Test L
For DTC U0140:87, GO to Pinpoint Test M
For DTC U0294:87, GO to Pinpoint Test N
For DTC U3003:16, GO to Pinpoint Test O
For DTC U3003:17, GO to Pinpoint Test P

GO to B4

B4 CHECK FOR POWER LIFTGATE MOTOR DIAGNOSTIC TROUBLE CODES (DTCS)

View the results from the RGTM self-test.

Is DTC B144F:11, B144F:12, B144F:13,B144F:79,B1557:11,B1557:12,B1557:13 or B1515:97 present?

Yes

GO to B5

GO to B9

B5 CHECK THE POWER LIFTGATE MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect RGTM C4174A .

Disconnect Suspect Power Liftgate Motor .

Ignition ON.

Measure:
Click to display connectors
Left Power Liftgate Motor

Positive Lead Measurement / Action Negative Lead

C4527-2 Ground

C4527-9 Ground

Click to display connectors
Right Power Liftgate Motor

Positive Lead Measurement / Action Negative Lead

C4528-2 Ground

C4528-9 Ground

Is any voltage present?

Yes

REPAIR the circuit in question.

GO to B6

B6 CHECK THE POWER LIFTGATE MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:
Click to display connectors
Left Power Liftgate Motor

Positive Lead Measurement / Action Negative Lead

C4527-2 Ground

C4527-9 Ground

Click to display connectors
Right Power Liftgate Motor

Positive Lead Measurement / Action Negative Lead

C4528-2 Ground

C4528-9 Ground

Are the resistances greater than 10,000 ohms?

Yes

GO to B7

No	REPAIR the circuit in question.

B7 CHECK THE POWER LIFTGATE MOTOR CIRCUITS FOR A SHORT TOGETHER

Measure:
Click to display connectors
Left Power Liftgate Motor

Positive Lead Measurement / Action Negative Lead

C4527-2 C4527-9

Click to display connectors
Right Power Liftgate Motor

Positive Lead Measurement / Action Negative Lead

C4528-2 C4528-9

Is the resistance greater than 10,000 ohms?

Yes

GO to B8

No	REPAIR the circuits.

B8 CHECK THE POWER LIFTGATE MOTOR CIRCUITS FOR AN OPEN

Measure:
Click to display connectors
Left Power Liftgate Motor

Positive Lead Measurement / Action Negative Lead

C4527-2 C4174A-5

C4527-9 C4174A-6

Click to display connectors
Right Power Liftgate Motor

Positive Lead Measurement / Action Negative Lead

C4528-2 C4174A-11

C4528-9 C4174A-12

Are the resistances less than 3 ohms?

Yes

GO to B10

No	REPAIR the circuit in question.

B9 CHECK FOR POWER LIFTGATE MOTOR SENSOR DIAGNOSTIC TROUBLE CODES (DTCS)

View the results from the RGTM self-test.

Is DTC B144D:29, B144E:29, B1A59:11,B1A59:13, B1555:29 or B1556:29 present?

Yes

GO to B10

GO to B14

B10 CHECK THE POWER LIFTGATE MOTOR SENSOR CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect RGTM C4174B .

Disconnect Suspect Power Liftgate Motor. .

Ignition ON.

Measure:
Click to display connectors

Left Power Liftgate Motor

Positive Lead	Measurement / Action	Negative Lead
C4527-4		Ground
C4527-5		Ground
C4527-6		Ground
C4527-7		Ground

Click to display connectors

Right Power Liftgate Motor

Positive Lead	Measurement / Action	Negative Lead
C4528-4		Ground
C4528-5		Ground
C4528-6		Ground
C4528-7		Ground

Is any voltage present?

Yes

REPAIR the circuit in question.

GO to B11

B11 CHECK THE POWER LIFTGATE MOTOR SENSOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:
Click to display connectors

Left Power Liftgate Motor

Positive Lead	Measurement / Action	Negative Lead
C4527-4		Ground
C4527-5		Ground
C4527-6		Ground
C4527-7		Ground

Click to display connectors

Right Power Liftgate Motor

Positive Lead	Measurement / Action	Negative Lead
C4528-4		Ground
C4528-5		Ground
C4528-6		Ground
C4528-7		Ground

Are the resistances greater than 10,000 ohms?

Yes

GO to B12

No	REPAIR the circuit in question.

B12 CHECK THE POWER LIFTGATE MOTOR SENSOR CIRCUITS FOR A SHORT TOGETHER

Measure:
Click to display connectors

Left Power Liftgate Motor

Positive Lead	Measurement / Action	Negative Lead
C4527-6		C4527-7
C4527-6		C4527-4
C4527-6		C4527-5
C4527-7		C4527-4
C4527-7		C4527-5
C4527-4		C4527-5

Click to display connectors

Right Power Liftgate Motor

Positive Lead	Measurement / Action	Negative Lead
C4528-6		C4528-7
C4528-6		C4528-4
C4528-6		C4528-5
C4528-7		C4528-4
C4528-7		C4528-5
C4528-4		C4528-5

Are the resistances greater than 10,000 ohms?

Yes

GO to B13

No	REPAIR the circuits in question.

B13 CHECK THE POWER LIFTGATE MOTOR SENSOR CIRCUITS FOR AN OPEN

Measure:
Click to display connectors

Left Power Liftgate Motor

Positive Lead	Measurement / Action	Negative Lead
C4527-4		C4174B-19
C4527-5		C4174B-20
C4527-6		C4174B-7
C4527-7		C4174B-8

Click to display connectors

Right Power Liftgate Motor

Positive Lead	Measurement / Action	Negative Lead
C4528-4		C4174B-19
C4528-5		C4174B-20
C4528-6		C4174B-4
C4528-7		C4174B-10

Are the resistances less than 3 ohms?

Yes

INSTALL a power liftgate motor in question.
REFER to: Power Liftgate Motor (501-03 Body Closures, Removal and Installation). TEST the system for normal operation. If the concern is still present, GO to B20

No	REPAIR the circuit in question.

B14 CHECK FOR OTHER LIFTGATE LATCH DIAGNOSTIC TROUBLE CODES (DTCS)

View the results from the RGTM self-test.

Are any RGTM Diagnostic Trouble Codes (DTCs) present?

Yes

For DTC B145D:11, B145D:12 or B145D:13, GO to B16
For all other Diagnostic Trouble Codes (DTCs), REFER to the RGTM DTC chart in this section.

GO to B15

B15 CHECK THE RGTM (REAR GATE TRUNK MODULE) LIFTGATE MOTOR SENSOR PID (PARAMETER IDENTIFICATION)

NOTE: If the liftgate motor sensor Parameter Identifications (PIDs) are not available or the liftgate latch does not release, proceed to the next step.

Open the liftgate to the full open position.

Ignition ON.

Using a diagnostic scan tool, view the RGTM Parameter Identifications (PIDs).

Using a diagnostic scan tool, view the RGTM liftgate motor sensor PID .

From the full open position, slowly close the liftgate.

Does the PID change state when the liftgate starts moving?

Yes

GO to B16

GO to B10

B16 CHECK THE LIFTGATE LATCH MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect RGTM C4174A .

Disconnect Power Liftgate Latch C4339B .

Ignition ON.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-2 Ground

C4174A-3 Ground

Is any voltage present?

Yes

REPAIR the circuit in question.

GO to B17

B17 CHECK THE LIFTGATE LATCH MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-2 Ground

C4174A-3 Ground

Are the resistances greater than 10,000 ohms?

Yes

GO to B18

No	REPAIR the circuit in question.

B18 CHECK THE LIFTGATE LATCH MOTOR CIRCUITS FOR A SHORT TOGETHER

Ignition OFF.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-2 C4174A-3

Is the resistance greater than 10,000 ohms?

Yes

GO to B19

No	REPAIR the circuits.

B19 CHECK THE LIFTGATE LATCH MOTOR CIRCUITS FOR AN OPEN

Ignition OFF.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-2 C4339B-1

C4174A-3 C4339B-2

Are the resistances less than 10,000 ohms?

Yes

GO to Pinpoint Test K

No	REPAIR the circuit in question.

B20 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the RGTM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST C: THE POWER LIFTGATE IS INOPERATIVE FROM ONE OF THE POWER LIFTGATE CONTROL SWITCHES

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM B12E8:11	Liftgate/Tailgate Control/Release Switch: Circuit Short To Ground	Sets when the BCM detects a short to ground from the exterior liftgate release switch input circuit.
RGTM B144C:23	Tailgate/Liftgate/Boot/Trunk Outer Handle Switch: Signal Stuck Low	Sets when the BCM detects signal stuck low from the outer handle switch input circuit.
RGTM B1219:11	Interior Boot/Trunk Release Switch: Circuit Short To Ground	Sets when the BCM detects a short to ground from the exterior liftgate release switch input circuit.
RGTM B11C4:23	Boot/trunk close button: Signal Stuck Low	Sets when the BCM detects signal stuck low from the Boot/trunk close button switch input circuit.

Possible Sources

Wiring, terminals or connectors
Front interior power liftgate switch
Rear interior power liftgate switch
Exterior liftgate release switch
BCM
RGTM

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: If the concern is with the exterior liftgate release switch, verify the concern is not passive entry related. If the liftgate opens from the liftgate release switch after the vehicle has been electronically unlocked but does not open from the liftgate release switch when the vehicle is locked, the concern is not with the power liftgate system.

C1 CHECK THE OPERATION OF THE POWER LIFTGATE FROM ALL THE SWITCH INPUTS

Ignition OFF.

Select PARK.

Ignition ON.

Close the liftgate (manually if necessary).

Unlock the doors using the door lock control switch.

Open and close the power liftgate using the front interior power liftgate switch (located on the instrument panel).

Open the power liftgate using the exterior liftgate release switch.

Close the power liftgate using the rear power liftgate switch (located on the bottom of the liftgate trim panel).

Does the power liftgate open or close from any input?

Yes

GO to C2

No	GO to Pinpoint Test B

C2 CHECK THE RGTM (REAR GATE TRUNK MODULE) POWER LIFTGATE SWITCH PARAMETER IDENTIFICATIONS (PIDS)

Using a diagnostic scan tool, view the RGTM Parameter Identifications (PIDs).

Using a diagnostic scan tool, monitor the following RGTM Parameter Identifications (PIDs):
- Access the RGTM and monitor the TAILGATE_SHUT_SW PID
- Access the RGTM and monitor the TAILGATE_REL_SW PID
- Access the RGTM and monitor the TAILGATE_IP-CS_SW PID

Do any of the Parameter Identifications (PIDs) indicate a switch is pressed?

Yes

GO to C3

GO to C6

C3 ISOLATE THE SUSPECT POWER LIFTGATE SWITCH FOR A SHORT TO GROUND USING THE LIFTGATE SWITCH PID (PARAMETER IDENTIFICATION)

Ignition OFF.

Disconnect the suspect power liftgate switch.

Ignition ON.

Using a diagnostic scan tool, monitor the following RGTM Parameter Identifications (PIDs):
- Access the RGTM and monitor the TAILGATE_SHUT_SW PID
- Access the RGTM and monitor the TAILGATE_REL_SW PID
- Access the RGTM and monitor the TAILGATE_IP-CS_SW PID

Does the PID in question continue to indicate a switch is pressed?

Yes

For the exterior liftgate release switch, GO to C4
For a front or rear interior power liftgate switch, GO to C5

No	INSTALL a new power liftgate switch in question.

C4 ISOLATE THE BCM (BODY CONTROL MODULE) FOR A SHORT TO GROUND WHILE CHECKING THE RGTM (REAR GATE TRUNK MODULE) TAILGATE_REL_SW PID (PARAMETER IDENTIFICATION)

Ignition OFF.

Disconnect BCM C2280E .

Ignition ON.

Using a diagnostic scan tool, monitor the RGTM TAILGATE_REL_SW PID .

Does the PID continue to indicate the switch is pressed?

Yes

GO to C5

GO to C9

C5 CHECK THE SUSPECT POWER LIFTGATE SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect RGTM C4174B .

Measure:
Click to display connectors
Front Interior Power Liftgate Switch

Positive Lead Measurement / Action Negative Lead

C4174B-3 Ground

Click to display connectors
Rear Interior Power Liftgate Switch

Positive Lead Measurement / Action Negative Lead

C4174B-11 Ground

Click to display connectors
Exterior Liftgate Release Switch

Positive Lead Measurement / Action Negative Lead

C4174B-25 Ground

Is the resistance greater than 10,000 ohms?

Yes

GO to C10

No	REPAIR the circuit.

C6 BYPASS THE SUSPECT POWER LIFTGATE SWITCH

Ignition OFF.

Disconnect the suspect power liftgate switch.

Unlock the doors using the door lock control switch.

NOTE: The liftgate must be open when carrying out this step if the rear interior power liftgate switch is the suspect component. For the suspect power liftgate switch, connect:
Click to display connectors
Front Interior Liftgate Switch

Positive Lead Measurement / Action Negative Lead

C2269-6 C2269-2

Click to display connectors
Rear Interior Liftgate Control Switch

Positive Lead Measurement / Action Negative Lead

C4333-6 C4333-2

Click to display connectors
Exterior Liftgate Release Switch

Positive Lead Measurement / Action Negative Lead

C4352-7 C4352-6

Remove the fused jumper wire.

Does the liftgate open or close?

Yes

INSTALL a new power liftgate switch in question.

GO to C7

C7 CHECK THE POWER LIFTGATE SWITCH GROUND CIRCUIT FOR AN OPEN

For the suspect power liftgate switch, connect:
Click to display connectors
Front Interior Liftgate Switch

Positive Lead Measurement / Action Negative Lead

C2269-6 Ground

Click to display connectors
Rear Interior Liftgate Control Switch

Positive Lead Measurement / Action Negative Lead

C4333-6 Ground

Click to display connectors
Exterior Liftgate Release Switch

Positive Lead Measurement / Action Negative Lead

C4352-7 Ground

Remove the fused jumper wire.

Does the liftgate open or close?

Yes

REPAIR the circuit.

GO to C8

C8 CHECK THE POWER LIFTGATE SWITCH INPUT CIRCUIT FOR AN OPEN

Disconnect RGTM C4174B .

For the suspect liftgate switch, measure:
Click to display connectors
Front Interior Liftgate Switch

Positive Lead Measurement / Action Negative Lead

C2269-6 C4174B-3

Click to display connectors
Rear Interior Liftgate Switch

Positive Lead Measurement / Action Negative Lead

C4333-6 C4174B-11

Click to display connectors
Exterior Liftgate Release Switch

Positive Lead Measurement / Action Negative Lead

C4352-7 C4174B-25

Is the resistance less than 3 ohms?

Yes

GO to C10

No	REPAIR the circuit.

C9 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the BCM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM. Refer to the appropriate Removal and Installation procedure in Section 419-10.

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

C10 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the RGTM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST D: THE POWER LIFTGATE STOPS IN THE SECONDARY LATCH POSITION

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM B1515:78	Tailgate/Liftgate/Boot/Trunk: Alignment Or Adjustment Incorrect	Sets when the RGTM detects the liftgate is unable to fully latch.

Possible Sources

Liftgate alignment
Liftgate striker alignment
Mechanical binding

D1 CHECK THE RGTM (REAR GATE TRUNK MODULE) LATCH AND PAWL SWITCHES PARAMETER IDENTIFICATIONS (PIDS)

Ignition ON.

Using a diagnostic scan tool, view RGTM Parameter Identifications (PIDs).

Using a diagnostic scan tool, monitor the following RGTM Parameter Identifications (PIDs):
- Access the RGTM and monitor the LATCH_HOME_SW ( ) PID
- Access the RGTM and monitor the LATCH_SECND_SW ( ) PID
- Access the RGTM and monitor the TAILGATE_PWL_SW PID

NOTE: The liftgate is in the primary position when the liftgate is in the full closed position. The liftgate is in the unlatch position when the liftgate is open and completely out of the striker. Begin with the liftgate in the open position, then slowly close the liftgate to the secondary latch (first click) and then primary latch (second click) positions.

Liftgate Latch Position	LATCH_HOME_SW ( )	LATCH_SECND_SW ( )	TAILGATE_PWL_SW ()
Fully unlatched	Active	Active	Active
Secondary (first click)	Active	Inactive	Active
Primary (second click)	Inactive	Inactive	Inactive

Do the switch states agree with the table?

Yes

GO to D2

No	GO to Pinpoint Test K

D2 CHECK THE MANUAL OPERATION OF THE LIFTGATE

Turn the power liftgate off (disable) from the message center.

While manually opening and closing the liftgate, check the liftgate for:
- Liftgate/wedge alignment
- Liftgate strut operation (strut should hold or push liftgate open when beyond half open)
- Power liftgate motor (should move freely while manually opening and closing liftgate and be securely mounted to the liftgate and bracket)
- Power liftgate latch (should latch completely)

Does the liftgate open and close correctly?

Yes

GO to D3

No	REPAIR as necessary.

D3 CHECK THE LIFTGATE LATCH AND STRIKER ALIGNMENT

Inspect the striker and latch for correct alignment.

Is the latch and striker aligned correctly?

Yes

GO to Pinpoint Test K

No	ALIGN the liftgate and striker. REFER to: Liftgate Alignment (501-03 Body Closures, General Procedures).

PINPOINT TEST E: THE POWER LIFTGATE REVERSES DURING A POWER CLOSE OPERATION

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

Possible Sources

Liftgate alignment
Liftgate striker alignment
Mechanical binding

E1 CHECK THE RGTM (REAR GATE TRUNK MODULE) LATCH AND PAWL SWITCH PARAMETER IDENTIFICATIONS (PIDS)

Using a diagnostic scan tool, view RGTM Parameter Identifications (PIDs).

Using a diagnostic scan tool, monitor the following RGTM Parameter Identifications (PIDs):
- Access the RGTM and monitor the LATCH_HOME_SW ( ) PID
- Access the RGTM and monitor the LATCH_SECND_SW ( ) PID
- Access the RGTM and monitor the TAILGATE_PWL_SW PID

Liftgate Latch Position	LATCH_HOME_SW ( )	LATCH_SECND_SW ( )	TAILGATE_PWL_SW ()
Fully unlatched	Active	Active	Active
Secondary (first click)	Active	Inactive	Active
Primary (second click)	Inactive	Inactive	Inactive

Do the switch states agree with the table?

Yes

GO to E2

No	GO to Pinpoint Test K

E2 CHECK THE MANUAL OPERATION OF THE LIFTGATE

Ignition ON.

Turn the power liftgate off (disable) from the message center.

While manually opening and closing the liftgate, check the liftgate for:
- Liftgate/wedge alignment
- Liftgate strut operation (strut should hold or push liftgate open)
- Power liftgate motor (should move freely while manually opening and closing liftgate and be securely mounted to the liftgate and bracket)
- Power liftgate latch (should latch completely)

Does the liftgate open and close correctly?

Yes

GO to Pinpoint Test K

No	REPAIR as necessary.

PINPOINT TEST F: THE POWER LIFTGATE ANTI-PINCH STRIP DOES NOT STOP OR REVERSE THE LIFTGATE

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

Possible Sources

Liftgate anti-pinch switch
RGTM

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

F1 CHECK FOR RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, carry out the RGTM self-test.

Are any Diagnostic Trouble Codes (DTCs) present?

Yes

REFER to the RGTM DTC Chart in this section.

GO to F2

F2 CHECK THE LIFTGATE ANTI-PINCH SWITCH

Ignition OFF.

Disconnect the suspect liftgate anti-pinch switch.

While pressing firmly and releasing the liftgate anti-pinch switch, measure:

Positive Lead	Measurement / Action	Negative Lead
C4172, pin 1, component side		C4172, pin 2, component side
C4173, pin 1, component side		C4173, pin 2, component side

Is the resistance between 0 to 200 ohms with the liftgate anti-pinch switch firmly pressed and between 5,700 and 6,700 ohms with the liftgate anti-pinch switch released?

Yes

GO to F3

No	INSTALL a new liftgate anti-pinch switch for the one in question. REFER to: Liftgate Anti-Pinch Switch (501-03 Body Closures, Removal and Installation).

F3 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the RGTM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST G: THE POWER LIFTGATE DOES NOT POWER CLOSE (POWER OPEN OK)

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM B1454:11	Tailgate/Liftgate/Boot/Trunk Left Pinch Strip: Circuit Short To Ground	Sets when the RGTM detects a short to ground from the left anti-pinch switch input.
RGTM B1454:13	Tailgate/Liftgate/Boot/Trunk Left Pinch Strip: Circuit Open	Sets when the RGTM detects an open from the left anti-pinch switch input.
RGTM B1455:11	Tailgate/Liftgate/Boot/Trunk Right Pinch Strip: Circuit Short To Ground	Sets when the RGTM detects a short to ground from the right anti-pinch switch input.
RGTM B1455:13	Tailgate/Liftgate/Boot/Trunk Right Pinch Strip: Circuit Open	Sets when the RGTM detects an open from the right anti-pinch switch input.

Possible Sources

Wiring, terminals or connectors
Liftgate alignment
Liftgate striker alignment
Mechanical binding
Liftgate anti-pinch switch
RGTM

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

G1 CHECK FOR RGTM (REAR GATE TRUNK MODULE) LIFTGATE ANTI-PINCH SWITCH DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, carry out the RGTM self-test.

Is DTC B1454:11, B1454:13, B1455:11 or B1455:13 present?

Yes

GO to G2

GO to G7

G2 CHECK THE LIFTGATE ANTI-PINCH SWITCH

Ignition OFF.

Disconnect the suspect liftgate anti-pinch switch.

While pressing firmly and releasing the liftgate anti-pinch switch, measure:

Positive Lead	Measurement / Action	Negative Lead
C4172, pin 1, component side		C4172, pin 2, component side
C4173, pin 1, component side		C4173, pin 2, component side

Is the resistance between 0 to 200 ohms with the liftgate anti-pinch switch firmly pressed and between 5,700 and 6,700 ohms with the liftgate anti-pinch switch released?

Yes

GO to G3

No	INSTALL a new liftgate anti-pinch switch for the one in question. REFER to: Liftgate Anti-Pinch Switch (501-03 Body Closures, Removal and Installation).

G3 CHECK THE LIFTGATE ANTI-PINCH SWITCH CIRCUITS FOR A SHORT TO VOLTAGE

Disconnect RGTM C4174B .

Ignition ON.

Measure:
Click to display connectors
Left Liftgate Anti-Pinch Switch

Positive Lead Measurement / Action Negative Lead

C4172-1 Ground

C4172-2 Ground

Click to display connectors
Right Liftgate Anti-Pinch Switch

Positive Lead Measurement / Action Negative Lead

C4173-1 Ground

C4173-2 Ground

Is any voltage present?

Yes

REPAIR the circuit in question.

GO to G4

G4 CHECK THE LIFTGATE ANTI-PINCH SWITCH CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Measure:
Click to display connectors
Left Liftgate Anti-Pinch Switch

Positive Lead Measurement / Action Negative Lead

C4172-1 Ground

Click to display connectors
Right Liftgate Anti-Pinch Switch

Positive Lead Measurement / Action Negative Lead

C4173-1 Ground

Is the resistance greater than 10,000 ohms?

Yes

GO to G5

No	REPAIR the circuit.

G5 CHECK THE LIFTGATE ANTI-PINCH SWITCH CIRCUITS FOR A SHORT TOGETHER

Measure:
Click to display connectors
Left Liftgate Anti-Pinch Switch

Positive Lead Measurement / Action Negative Lead

C4172-1 C4172-2

Click to display connectors
Right Liftgate Anti-Pinch Switch

Positive Lead Measurement / Action Negative Lead

C4173-1 C4173-2

Is the resistance greater than 10,000 ohms?

Yes

GO to G6

No	REPAIR the circuits.

G6 CHECK THE LIFTGATE ANTI-PINCH SWITCH CIRCUITS FOR AN OPEN

Measure:
Click to display connectors
Left Liftgate Anti-Pinch Switch

Positive Lead Measurement / Action Negative Lead

C4172-1 C4174B-12

C4172-2 C4174B-21

Click to display connectors
Right Liftgate Anti-Pinch Switch

Positive Lead Measurement / Action Negative Lead

C4173-1 C4174B-14

C4173-2 C4174B-21

Are the resistances less than 3 ohms?

Yes

GO to G9

No	REPAIR the circuit in question.

G7 CHECK FOR OTHER RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Review the results from the RGTM self-test.

Are any Diagnostic Trouble Codes (DTCs) present?

Yes

REFER to the RGTM DTC Chart in this section.

GO to G8

G8 CHECK THE MANUAL OPERATION OF THE LIFTGATE

Turn the power liftgate off (disable) from the message center.

While manually opening and closing the liftgate, check the liftgate for:
- Liftgate/wedge alignment
- Liftgate strut operation (strut should hold or push liftgate open when beyond half open)
- Power liftgate motor (should move freely while manually opening and closing liftgate and be securely mounted to the liftgate and bracket)
- Power liftgate latch (should latch completely)

Does the liftgate open and close correctly?

Yes

GO to Pinpoint Test K

No	REPAIR as necessary.

G9 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the RGTM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST H: THE POWER LIFTGATE DOES NOT POWER OPEN (POWER CLOSE OK)

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

Possible Sources

Liftgate alignment
Liftgate striker alignment
Mechanical binding

H1 CHECK FOR RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, carry out the RGTM self-test.

Are any Diagnostic Trouble Codes (DTCs) present?

Yes

REFER to the RGTM DTC Chart in this section.

GO to H2

H2 CHECK THE LIFTGATE LATCH RELEASE OPERATION

NOTE: Make sure the power liftgate is enabled from the message center.

Ignition ON.

Select PARK.

Unlock the doors using a door lock control switch.

Press the front interior power liftgate switch.

Does the liftgate latch release?

Yes

GO to H3

No	GO to Pinpoint Test B

H3 CHECK THE MANUAL OPERATION OF THE LIFTGATE

Turn the power liftgate off (disable) from the message center.

While manually opening and closing the liftgate, check the liftgate for:
- Liftgate/wedge alignment
- Liftgate strut operation (strut should hold or push liftgate open when beyond half open)
- Power liftgate motor (should move freely while manually opening and closing liftgate and be securely mounted to the liftgate and bracket)
- Power liftgate latch (should latch completely)

Does the liftgate open and close correctly?

Yes

GO to Pinpoint Test B

No	REPAIR as necessary.

PINPOINT TEST I: THE POWER LIFTGATE CLOSES (WITH A CONTINUOUS CHIME) IMMEDIATELY AFTER A POWER OPEN

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

Possible Sources

Excessive weight on the liftgate, such as snow, ice or a bicycle rack
Liftgate strut
Power liftgate initialization

I1 CHECK FOR RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: Make sure there is no excessive weight on the liftgate, such as snow, ice or a luggage rack.

Ignition ON.

Using a diagnostic scan tool, carry out the RGTM self-test.

Are any Diagnostic Trouble Codes (DTCs) present?

Yes

REFER to the RGTM DTC Chart in this section.

GO to I2

I2 CHECK THE LIFTGATE STRUT

Verify there is no excessive weight on the liftgate, such as snow, ice or a bicycle rack.

Turn the power liftgate off (disable) from the message center.

Operate the liftgate manually to verify the liftgate strut holds the liftgate open in various positions.

Does the liftgate strut hold the liftgate open correctly?

Yes

GO to I3

No	INSTALL a new liftgate strut. INITIALIZE the power liftgate. REFER to: Power Liftgate Initialization (501-03 Body Closures, General Procedures).

I3 INITIALIZE THE POWER LIFTGATE AND RECHECK THE OPERATION

Initialize the power liftgate.
REFER to: Power Liftgate Initialization (501-03 Body Closures, General Procedures).

Operate the power liftgate using the front interior power liftgate switch.

Does the liftgate close with a continuous chime immediately after a power open?

Yes

GO to I4

No	The system is operating correctly. The concern may have been caused by an incorrectly initialized RGTM or weight on the liftgate.

I4 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the RGTM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST J: THE POWER LIFTGATE HANDS-FREE ACTUATION IS INOPERATIVE

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM B1495:11	Hands Free Liftgate/Decklid Input Sensor: Circuit Short To Ground	Sets when the BCM detects a short to ground from the hands-free liftgate actuation module input.

Possible Sources

Wiring, terminals or connectors
Hands-free liftgate actuation module
Hands-free liftgate actuation lower sensor
Hands-free liftgate actuation upper sensor
BCM

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

J1 CHECK THE POWER LIFTGATE OPERATION FROM THE EXTERIOR LIFTGATE RELEASE SWITCH

NOTE: Make sure the power liftgate is enabled from the message center.

Ignition ON.

Unlock the doors from the door lock control switch.

Press the exterior liftgate release switch on the liftgate.

Does the power liftgate open?

Yes

GO to J2

No	GO to Pinpoint Test C

J2 CHECK THE LIFTGATE PASSIVE ENTRY OPERATION

NOTE: Make sure the passive entry feature is enabled from the message center.

Ignition OFF.

Close the liftgate.

Lock the doors using the RKE transmitter.

With a valid programmed passive key within 1 meter (3 feet) of the rear bumper, press the exterior liftgate release switch on the liftgate.

Does the power liftgate open?

Yes

GO to J3

No	DIAGNOSE the liftgate passive entry feature. REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).

J3 VERIFY THE CONCERN IS PRESENT

Close the liftgate.

With the passive key within 1 meter (3 feet) of the rear bumper, move your foot towards and then away (similar to a kicking motion) near the center of the rear bumper.

Does the power liftgate open?

Yes

The system is operating correctly. INFORM the customer of the operation of the hands-free liftgate actuation.

GO to J4

J4 CHECK THE POWER LIFTGATE HANDS-FREE ACTUATION MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Disconnect Hands-Free Liftgate Actuation Module C4401 .

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4401-2 Ground

Is the voltage greater than 11 volts?

Yes

GO to J5

No	REPAIR the circuit.

J5 CHECK THE POWER LIFTGATE HANDS-FREE ACTUATION MODULE GROUND CIRCUIT FOR AN OPEN

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4401-2 C4401-3

Is the voltage greater than 11 volts?

Yes

GO to J6

No	REPAIR the circuit.

J6 BYPASS THE HANDS-FREE LIFTGATE ACTUATION MODULE

NOTE: If the fuse in the jumper wire fails, refer to the Wiring Diagrams manual to identify the possible causes of the circuit short.

Place a programmed passive key within 1 meter (3 feet) of the rear bumper.

Connect:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4401-1 C4401-3

Remove the fused jumper wire.

Does the power liftgate open?

Yes

GO to J9

GO to J7

J7 CHECK THE BCM (BODY CONTROL MODULE) HANDS-FREE INPUT CIRCUIT FOR A SHORT TO GROUND

Disconnect BCM C2280E .

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4401-1 Ground

Is the resistance greater than 10,000 ohms?

Yes

GO to J8

No	REPAIR the circuit.

J8 CHECK THE BCM (BODY CONTROL MODULE) HANDS-FREE INPUT CIRCUIT FOR AN OPEN

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4401-1 C2280E-29

Is the resistance less than 3 ohms?

Yes

GO to J11

No	REPAIR the circuit.

J9 CHECK THE HANDS-FREE LIFTGATE ACTUATION LOWER SENSOR

INSTALL a new hands-free liftgate actuation lower sensor.
REFER to: Hands-Free Liftgate Actuation Lower Sensor (501-03 Body Closures, Removal and Installation).

Check the operation of the hands-free liftgate actuation.

Does the hands-free liftgate actuation operate?

Yes

The system is operating correctly. The concern was caused by the hands-free liftgate actuation lower sensor.

GO to J10

J10 CHECK THE HANDS-FREE LIFTGATE ACTUATION UPPER SENSOR

INSTALL a new hands-free liftgate actuation upper sensor.
REFER to: Hands-Free Liftgate Actuation Upper Sensor (501-03 Body Closures, Removal and Installation).

Check the operation of the hands-free liftgate actuation.

Does the hands-free liftgate actuation operate?

Yes

The system is operating correctly. The concern was caused by the hands-free liftgate actuation upper sensor.

No	INSTALL a new hands-free liftgate actuation module. REFER to: Hands-Free Liftgate Actuation Module (501-03 Body Closures, Removal and Installation).

J11 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the BCM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM. Refer to the appropriate Removal and Installation procedure in Section 419-10.

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST K: B1451:29, B1453:29

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description (501-03 Body Closures, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM B1451:29	Tailgate/Liftgate/Boot/Trunk Latch Centering Position Switch: Signal Invalid	Sets when the RGTM detects the sector gear open/close switch(es) are not in the correct state at the beginning of self-test, or no sector gear switch transition during releasing/cinching.
RGTM B1453:29	Tailgate/Liftgate/Boot/Trunk Latch Position Switch: Signal Invalid	Sets when the RGTM detects the sector gear open/close switch(es) are not in the correct state at the beginning of self-test, or no sector gear switch transition during releasing/cinching.

Possible Sources

Wiring, terminals or connectors
Liftgate latch
RGTM

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

K1 CHECK FOR OTHER RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Review the results from the RGTM self-test.

Are any Diagnostic Trouble Codes (DTCs) present other than B1451:29 or B1453:29?

Yes

DIAGNOSE all other RGTM Diagnostic Trouble Codes (DTCs) first. REFER to the RGTM DTC Chart in this section.

GO to K2

K2 CHECK THE LIFTGATE LATCH INPUT CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Disconnect RGTM C4174B .

Disconnect Liftgate Latch C4339A .

Measure:
Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C4339A-1		Ground
C4339A-3		Ground
C4339A-4		Ground

Are the resistances greater than 10,000 ohms?

Yes

GO to K3

No	REPAIR the circuit in question.

K3 CHECK THE LIFTGATE LATCH INPUT CIRCUITS FOR A SHORT TO EACH OTHER

Measure:
Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C4339A-1		C4339A-3
C4339A-1		C4339A-4
C4339A-4		C4339A-3

Are the resistances greater than 10,000 ohms?

Yes

GO to K4

No	REPAIR the circuits in question.

K4 CHECK THE LIFTGATE LATCH INPUT CIRCUITS FOR AN OPEN

Measure:
Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C4339A-1		C4174B-16
C4339A-3		C4174B-18
C4339A-4		C4174B-17
C4339B-4		C4174B-2

Are the resistances less than 3 ohms?

Yes

INSTALL a new liftgate latch.
REFER to: Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation). TEST the system for normal operation. If the concern is still present, GO to K5

No	REPAIR the circuit in question.

K5 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the RGTM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST L: U0101:87

Normal Operation and Fault Conditions

The RGTM and the PCM communicate through the CAN . Messages are exchanged between the modules for the purposes of determining what functions are carried out.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM U0101:87	Lost Communication with TCM: Missing Message	Sets by the RGTM if expected transmission range data messages received from the PCM over the CAN are missing.

Possible Sources

Network communication concern
PCM
RGTM

L1 VERIFY THE CUSTOMER CONCERN

Ignition ON.

Verify there is an observable symptom present.

Is an observable symptom present?

Yes

GO to L2

No	CLEAR the DTC . The system is operating correctly at this time. The DTC may have been set due to high network traffic or intermittent fault condition.

L2 CHECK THE COMMUNICATION NETWORK

Using a diagnostic scan tool, carry out the network test.

Does the PCM pass the network test?

Yes

GO to L3

L3 CARRY OUT THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST

Using a diagnostic scan tool, carry out the PCM KOEO and KOER self-tests.

Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes

DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs). REFER to the PCM DTC Chart in the appropriate 303-14 section.

GO to L4

L4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RGTM (REAR GATE TRUNK MODULE) SELF-TEST

Review the results from the RGTM self-test.

Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes

DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs). REFER to the RGTM DTC Chart in this section.

GO to L5

L5 RECHECK THE RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, clear the RGTM Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Wait 10 seconds.

Using a diagnostic scan tool, carry out the continuous memory self-test.

Check the RGTM Diagnostic Trouble Codes (DTCs).

Is DTC U0101:87 still present?

Yes

GO to L6

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or intermittent fault condition.

L6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

Check the vehicle service history for recent service actions related to the PCM . If recent service history is found:
- verify correct replacement module was installed
  - HVBOM may be used to verify correct part number
- verify the configuration of replacement module was correct
  - re-configure module using as-built data if prior configuration is suspect
- verify the module was not obtained from a like vehicle and installed into customer vehicle
  - return the swapped module to source vehicle and obtain new replacement module

Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?

Yes

GO to L7

No	The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

L7 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Disconnect and inspect all PCM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the PCM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

Click here to access Guided Routine (PCM).

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST M: U0140:87

Normal Operation and Fault Conditions

The RGTM and the BCM communicate through the CAN . Messages are exchanged between the modules for the purposes of determining what functions are carried out.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM U0140:87	Lost Communication With Body Control Module: Missing Message	Sets by the RGTM if expected data messages received from the BCM over the CAN are missing.

Possible Sources

Network communication concern
RGTM
BCM

M1 VERIFY THE CUSTOMER CONCERN

Ignition ON.

Verify there is an observable symptom present.

Is an observable symptom present?

Yes

GO to M2

No	CLEAR the DTC . The system is operating correctly at this time. The DTC may have been set due to high network traffic or intermittent fault condition.

M2 CHECK THE COMMUNICATION NETWORK

Using a diagnostic scan tool, carry out the network test.

Does the BCM pass the network test?

Yes

GO to M3

M3 CARRY OUT THE BCM (BODY CONTROL MODULE) SELF-TEST

Using a diagnostic scan tool, carry out the BCM self-test.

Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes

DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs).
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).

GO to M4

M4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RGTM (REAR GATE TRUNK MODULE) SELF-TEST

Review the results from the RGTM self-test.

Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes

DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs). REFER to the RGTM DTC Chart in this section.

GO to M5

M5 RECHECK THE RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, clear the RGTM Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Wait 10 seconds.

Using a diagnostic scan tool, carry out the continuous memory self-test.

Check the RGTM Diagnostic Trouble Codes (DTCs).

Is DTC U0140:87 still present?

Yes

GO to M6

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or intermittent fault condition.

M6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

Check the vehicle service history for recent service actions related to the BCM . If recent service history is found:
- verify correct replacement module was installed
  - HVBOM may be used to verify correct part number
- verify the configuration of replacement module was correct
  - re-configure module using as-built data if prior configuration is suspect
- verify the module was not obtained from a like vehicle and installed into customer vehicle
  - return the swapped module to source vehicle and obtain new replacement module

Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?

Yes

GO to M7

No	The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

M7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the BCM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM. Refer to the appropriate Removal and Installation procedure in Section 419-10.

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST N: U0294:87

Normal Operation and Fault Conditions

The RGTM and the PCM communicate through the CAN . Messages are exchanged between the modules for the purposes of determining what functions are carried out.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM U0294:87	Lost Communication With Powertrain Control Monitor Module: Missing Message	Sets by the RGTM if expected data messages received from the PCM over the CAN are missing.

Possible Sources

Network communication concern
RGTM
PCM

N1 VERIFY THE CUSTOMER CONCERN

Ignition ON.

Verify there is an observable symptom present.

Is an observable symptom present?

Yes

GO to N2

No	CLEAR the DTC . The system is operating correctly at this time. The DTC may have been set due to high network traffic or intermittent fault condition.

N2 CHECK THE COMMUNICATION NETWORK

Using a diagnostic scan tool, carry out the network test.

Does the PCM pass the network test?

Yes

GO to N3

N3 CARRY OUT THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST

Using a diagnostic scan tool, carry out the PCM KOEO and KOER self-tests.

Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes

DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs). REFER to the PCM DTC Chart in the appropriate 303-14 section.

GO to N4

N4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RGTM (REAR GATE TRUNK MODULE) SELF-TEST

Review the results from the RGTM self-test.

Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes

DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs). REFER to the RGTM DTC Chart in this section.

GO to N5

N5 RECHECK THE RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, clear the RGTM Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Wait 10 seconds.

Using a diagnostic scan tool, carry out the continuous memory self-test.

Check the RGTM Diagnostic Trouble Codes (DTCs).

Is DTC U0294:87 still present?

Yes

GO to N6

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or intermittent fault condition.

N6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

Check the vehicle service history for recent service actions related to the PCM . If recent service history is found:
- verify correct replacement module was installed
  - HVBOM may be used to verify correct part number
- verify the configuration of replacement module was correct
  - re-configure module using as-built data if prior configuration is suspect
- verify the module was not obtained from a like vehicle and installed into customer vehicle
  - return the swapped module to source vehicle and obtain new replacement module

Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?

Yes

GO to N7

No	The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

N7 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Disconnect and inspect all PCM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the PCM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

Click here to access Guided Routine (PCM).

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST O: U3003:16

Normal Operation and Fault Conditions

The RGTM monitors its high current voltage supply circuit. If a fault is detected, the RGTM disables the power liftgate function.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM U3003:16	Battery Voltage: Circuit Voltage Below Threshold	Sets when the RGTM detects the high current voltage supply circuit is less than 8 volts.

Possible Sources

High circuit resistance
Charging system concern
RGTM

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

O1 RECHECK THE RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs)

Wait 30 seconds.

Using a diagnostic scan tool, carry out the RGTM self-test.

Is DTC U3003:16 still present?

Yes

GO to O2

No	The system is operating normally at this time. The DTC may have been set due to a previous low battery voltage condition.

O2 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES

Using a diagnostic scan tool, retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is any other battery or charging system related DTC set in other modules?

Yes

Diagnose the charging system concern. REFER to the appropriate Diagnosis and Testing in section 414-00.

GO to O3

O3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

Ignition OFF.

Check the battery condition and verify the battery is fully charged.
REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Is the battery OK and fully charged?

Yes

GO to O4

No	DIAGNOSE the battery. REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

O4 CHECK THE RGTM (REAR GATE TRUNK MODULE) POWER_SUPPLY_POWER_VBATT (GATE_PWR_V) PID (PARAMETER IDENTIFICATION)

Ignition ON.

Measure and record the voltage at the battery.

Using a diagnostic scan tool, monitor the RGTM Gate_Pwr_V PID .

Is the voltage within 0.2 volt of the recorded battery voltage?

Yes

GO to O7

GO to O5

O5 CHECK THE RGTM (REAR GATE TRUNK MODULE) VOLTAGE SUPPLY CIRCUIT FOR HIGH RESISTANCE

Ignition OFF.

Disconnect RGTM C4174A .

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-4 Ground

Is the voltage within 0.2 volt of the recorded battery voltage?

Yes

GO to O6

No	REPAIR the circuit.

O6 CHECK THE RGTM (REAR GATE TRUNK MODULE) GROUND CIRCUIT FOR HIGH RESISTANCE

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C4174A-1 Ground

Is the resistance less than 3 ohms?

Yes

GO to O7

No	REPAIR the circuit.

O7 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors.

Repair:
- corrosion (install new connectors or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect all the RGTM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST P: U3003:17

Normal Operation and Fault Conditions

The RGTM monitors its high current voltage supply circuit. If a fault is detected, the RGTM disables the power liftgate function.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM U3003:17	Battery Voltage: Circuit Voltage Above Threshold	Sets when the RGTM detects the high current voltage supply circuit is more than 16.5 volts.

Possible Sources

Charging system concern
RGTM

NOTE: DTC U3003:17 may be stored in the module memory due to previous battery charging or vehicle jump starting event.

P1 CHECK FOR OVER VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES

Ignition ON.

Using a diagnostic scan tool, retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Are any over voltage Diagnostic Trouble Codes (DTCs) set in other modules?

Yes

DIAGNOSE an overcharging condition. REFER to the appropriate Diagnosis and Testing in section 414-00.

GO to P2

P2 CHECK THE BATTERY VOLTAGE

Turn off all interior/exterior lights and accessories.

Start and run the engine at approximately 2,000 rpm for 3 minutes while monitoring the battery voltage.

Does the battery voltage rise to 15.5 volts or higher?

Yes

DIAGNOSE an overcharging condition. REFER to the appropriate Diagnosis and Testing in section 414-00.

GO to P3

P3 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:17

Ignition OFF.

Ignition ON.

Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the RGTM self-test.

Is DTC U3003:17 still present?

Yes

INSTALL a new RGTM .
REFER to: Rear Gate Trunk Module (RGTM) (501-03 Body Closures, Removal and Installation).

No	The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

PINPOINT TEST Q: THE LIFTGATE WINDOW GLASS IS INOPERATIVE

Refer to Wiring Diagrams Cell 117 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Handles, Locks, Latches and Entry Systems - System Operation and Component Description (501-14 Handles, Locks, Latches and Entry Systems, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM B1584:11	Decklid/Liftglass Release Output: Circuit Short To Ground	Sets when the BCM detects a short to ground in the liftgate actuator.
RGTM B1584:12	Decklid/Liftglass Release Output: Circuit Short To Battery	Sets when the BCM detects a short to battery in the liftgate actuator.
RGTM B1584:13	Decklid/Liftglass Release Output: Circuit Open	Sets when the BCM detects an open in the lifgate actuator.

Possible Sources

Wiring, terminals, or connectors
Liftgate glass actuator
BCM

Q1 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE)B1584:11, B1584:12 OR B1584:13

Using a diagnostic scan tool, clear the BCM Diagnostic Trouble Codes (DTCs).

Ignition ON.

Wait at least 5 seconds.

Repeat the BCM self-test using a diagnostic scan tool.

Is DTC B1584:11, B1584:12 or B1584:13 set in the BCM?

Yes

GO to Q2

No	Install a new liftgate glass actuator. REFER to: Liftgate Window Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).

Q2 CHECK THE CIRCUIT TO THE LIFTGATE GLASS ACTUATOR FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect: BCM C2280C.

Using the Terminal Release Kit, temporarily remove BCM C2280C-33

Connect: BCM C2280C.

Ignition ON.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C2280C-33 Ground

Is any voltage present?

Yes

REPAIR the circuits.

No	Ignition OFF. INSTALL C2280C-33. GO to Q3

Q3 CHECK THE CIRCUIT TO THE LIFTGATE GLASS ACTUATOR A SHORT TO GROUND

Ignition OFF.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C2280C-33 Ground

Are the resistances greater than 10,000 ohms?

Yes

GO to Q4

No	REPAIR the circuit in question.

Q4 CHECK THE CIRCUIT TO THE LIFTGATE GLASS ACTUATOR FOR AN OPEN

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C2280C-33 C4040-3

Are the resistances less than 3 ohms?

Yes

GO to Q5

No	REPAIR the circuit in question.

Q5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE)OPERATION

Ignition OFF.

Disconnect and inspect all the BCM connectors.

Repair:
- Corrosion (clean module pins or install new connectors or terminals)
- Damaged or bent pins (install new terminals or pins)
- Pushed-out pins (install new pins as necessary)

Reconnect the BCM connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM. Refer to the appropriate Removal and Installation procedure in Section 419-10.

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST R: THE COURTESY LAMPS DO NOT ILLUMINATE WITH THE LIFTGATE OPEN

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Interior Lighting - System Operation and Component Description (417-02 Interior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
BCM B1306:11	Liftgate Ajar Switch: Circuit Short To Ground	A continuous memory and on-demand DTC that sets when the RGTM detects a short to ground on the liftgate ajar output circuit.
BCM B1306:12	Liftgate Ajar Switch: Circuit Short To Battery	A continuous memory and on-demand DTC that sets when the RGTM detects a short to voltage on the liftgate ajar output circuit.

Possible Sources

Wiring, terminals or connectors
RGTM
BCM

R1 CHECK THE COURTESY LAMP OPERATION FROM ANY DOOR

Ignition OFF.

Open any door and observe the courtesy lamps.

Do the courtesy lamps illuminate?

Yes

GO to R2

No	REFER to: Interior Lighting (417-02 Interior Lighting, Diagnosis and Testing).

R2 CHECK THE RGTM (REAR GATE TRUNK MODULE)

Disconnect RGTM C4174A .

Do the courtesy lamps illuminate?

Yes

GO to R4

GO to R3

R3 CHECK THE LIFTGATE AJAR INPUT CIRCUIT FOR A SHORT TO GROUND

Disconnect BCM C2280E .

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C2280E-34 Ground

Is the resistance greater than 10,000 ohms?

Yes

GO to R5

No	REPAIR the circuit.

R4 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors and related in-line connectors.

Repair:
- corrosion (install new connector or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect the RGTM connectors and related in-line connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RGTM .
REFER to: Rear Gate Trunk Module (RGTM) (501-03 Body Closures, Removal and Installation).

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the Diagnostic Trouble Codes (DTCs).

R5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors and related in-line connectors.

Repair:
- corrosion (install new connector or terminals – clean module pins)
- damaged or bent pins – install new terminals/pins
- pushed-out pins – install new pins as necessary

Reconnect the BCM connectors and related in-line connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the Diagnostic Trouble Codes (DTCs).

PINPOINT TEST S: B1515 : 77

Normal Operation and Fault Conditions

REFER to: Body Closures (501-03 Body Closures, Diagnosis and Testing).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM B1515:77	Tailgate/Liftgate/Boot/Trunk: Commanded Position Not Reachable	DIAGNOSE all other Diagnostic Trouble Codes (DTCs) first. If no other DTC is present, Manually OPERATE the luggage compartment lid and CHECK for mechanical binding.

Possible Sources

RGTM

S1 DIAGNOSE ALL OTHER DIAGNOSTIC TROUBLE CODES (DTCS) FIRST.

DIAGNOSE all other Diagnostic Trouble Codes (DTCs) first. If no other DTC is present, Manually OPERATE the luggage compartment lid and CHECK for mechanical binding.

Is there a mechanical binding?

Yes

If mechanical binding exists, REPAIR as necessary.

No	If no mechanical binding is found, CHECK the luggage compartment lid alignment. REFER to: Liftgate Alignment (501-03 Body Closures, General Procedures).

PINPOINT TEST T: U201A:55

Normal Operation and Fault Conditions

REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Phone as a Key, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RFA U201A:55	Control Module Main Calibration Data: Not Configured	Sets when the RFA module memory not programmed.

Possible Sources

There is no RFA module ID stored in the BCM memory
Internal memory error

T1 CHECK RFA (REMOTE FUNCTION ACTUATOR)MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the RFA module self-test.

Is DTC B15A5:56 present?

Yes

CARRY OUT a reload of the RFA module calibration file and configuration.

No	The system is operating correctly at this time. The module software configuration was not complete or the internal memory was not programmed.

PINPOINT TEST U: U2300:55, U2300:56

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM U2300:55	Central Configuration: Not Configured	This continuous memory DTC sets when Central Configuration: Not Configured
RGTM U2300:56	Central Configuration: Invalid/Incompatible Configuration	This continuous memory DTC sets when Central Configuration: Invalid/Incompatible Configuration

Possible Sources

RGTM

U1 CARRY OUT THE PMI PROCEDURE USING AS-BUILT DATA

CARRY OUT the PMI procedure using As-Built data. CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test

Is the DTC U2300:55 and U2300:56 returns?

Yes

Install new RGTM.
REFER to: Rear Gate Trunk Module (RGTM) (501-03 Body Closures, Removal and Installation).

No	The system is operating correctly at this time. The module software configuration was not complete or the internal memory was not programmed.

PINPOINT TEST V: U3000:41 ,U3000:49

Normal Operation and Fault Conditions

REFER to: Body Closures (501-03 Body Closures, Diagnosis and Testing).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM U3000:41	Control Module: General Checksum Failure	Sets when General Check sum Failure
RGTM U3000:49	Control Module: Internal Electronic Failure	Sets when Internal Electronic Failure

Possible Sources

RGTM

V1 CARRY OUT THE PMI PROCEDURE USING AS-BUILT DATA.

CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test.

Is the DTC U3000:41 and U3000:49 returns,

Yes

Install new RGTM.
REFER to: Rear Gate Trunk Module (RGTM) (501-03 Body Closures, Removal and Installation).

No	The system is operating correctly at this time. The module software configuration was not complete or the internal memory was not programmed.

Body Closures - System Operation and Component Description. Description and Operation

S..

Front Door Alignment. General Procedures

Inspection NOTE: LH side shown, RH side similar. Check the body-to-front door dimensions. Refer to: Body and Frame (501-26 Body Repairs - Vehicle Specific Information and Tolerance Checks, Description and Operation)...

Other information:

Lincoln Navigator 2018-2024 Workshop Manual: Second Row Single Seat Cushion Cover. Removal and Installation

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Lincoln Navigator 2018-2024 Workshop Manual: Interior Camera System. Diagnosis and Testing

Diagnostic Trouble Code (DTC) Chart Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Information, Description and Operation). Module DTC Description Action CMR B115E:49 Camera Module: Internal Electronic Failure GO to Pinpoint Test A CMR B115E:54 Cam..

Rear Camber Adjustment. General Procedures

Special Tool(s) / General Equipment

Wheel Alignment System

Activation

NOTICE: Suspension fasteners are critical parts that affect the performance of vital components and systems. Failure of these fasteners may result in major service expense. Use the same or equivalent parts if replacement is necessary. Do not use a replacement part of lesser quality or substitute design. Tighten fasteners as specified.

Using alignment equipment and the manufacturer's instructions, measure the rear camber.
Use the General Equipment: Wheel Alignment System

Lincoln Navigator: Body Closures / Body Closures. Diagnosis and Testing

Body Closures - System Operation and Component Description. Description and Operation

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Rear Camber Adjustment. General Procedures