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Lincoln Navigator: Perimeter Anti-Theft Alarm / Perimeter Anti-Theft Alarm. Diagnosis and Testing

Lincoln Navigator 2018-2025 Workshop Manual / Electronic Feature Group / Perimeter Anti-Theft Alarm / Perimeter Anti-Theft Alarm. Diagnosis and Testing

DTC Chart: BCM

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).

  DTC Description Action
B109F:01 Intrusion Sensor Module: General Electrical Failure   GO to Pinpoint Test B
B109F:02 Intrusion Sensor Module: General Signal Failure   GO to Pinpoint Test B
B109F:08 Intrusion Sensor Module: Bus Signal / Message Failure   GO to Pinpoint Test B
B109F:49 Intrusion Sensor Module: Internal Electronic Failure INSTALL a new intrusion sensor.
REFER to: Intrusion Sensor (419-01A Perimeter Anti-Theft Alarm, Removal and Installation).
B109F:55 Intrusion Sensor Module: Not Configured Using a diagnostic scan tool, PERFORM the LIN New Module Initialization procedure (Toolbox> BCM > LIN New Module Initialization).
B109F:97 Intrusion Sensor Module: Component or System Operation Obstructed or Blocked   GO to Pinpoint Test B
B109F:9A Intrusion Sensor Module: Component or System Operating Conditions   GO to Pinpoint Test B
B11D9:09 Vehicle Battery: Component Failure   GO to Pinpoint Test B
B1305:01 Hood Switch: General Electrical Failure   GO to Pinpoint Test D
All other Diagnostic Trouble Codes (DTCs) -  
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).

Symptom Chart: Anti-Theft - Perimeter

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).

Condition Possible Sources Actions
No horn output during alarm activation Horn output concern DIAGNOSE the inoperative horn
REFER to: Horn (413-06 Horn, Diagnosis and Testing).
The alarm system does not activate from an unauthorized entry at a door Door ajar concern DIAGNOSE the courtesy lamps not illuminating with a door open
REFER to: Interior Lighting (417-02 Interior Lighting, Diagnosis and Testing).
The alarm system does not activate from an unauthorized entry at the liftgate Door ajar concern DIAGNOSE the courtesy lamps not illuminating with a door open
REFER to: Interior Lighting (417-02 Interior Lighting, Diagnosis and Testing).
The alarm system does not activate from an unauthorized entry at the hood Refer to the Pinpoint Test   GO to Pinpoint Test A
The alarm system does not activate from the intrusion sensor Refer to the Pinpoint Test   GO to Pinpoint Test B
The alarm system does not arm or no turn signals flash confirmation Refer to the Pinpoint Test   GO to Pinpoint Test C
The alarm system falsely activates
  • A valid PATS key read was NOT received when the ignition transitioned to RUN
  • Panic button pressed on a RKE transmitter
  • Door ajar input
  • Intrusion/inclination sensor input
  • Hood ajar input
  • An intermittent fault exists. Using a diagnostic scan tool, view the following BCM Parameter Identifications (PIDs) to identify and isolate the cause of the last alarm activation.
    • Most Recent Alarm Trigger Event (ALARM_EVT_1)
    • 2nd Most Recent Alarm Trigger Event (ALARM_EVT_2)
    • 3rd Most Recent Alarm Trigger Event (ALARM_EVT_3)
    • 4th Most Recent Alarm Trigger Event (ALARM_EVT_4)
  • For a PID value of "Panic" causing the false alarm event, the system is operating correctly at this time. INSTRUCT the customer in the correct operation of the panic alarm feature. REFER to "Panic Alarm" in the Owner's Literature.
  • For a PID value of "Door Ajar" causing the false alarm event, DIAGNOSE the ajar switches.
    REFER to: Interior Lighting (417-02 Interior Lighting, Diagnosis and Testing).
  • For a PID value of "Interior Motion Detected" or "Tilt Detected" causing the false alarm event, diagnose the intrusion/tilt sensor. GO to Pinpoint Test B
  • For a PID value of "Hood Ajar" causing the false alarm event, diagnose the hood ajar switch. GO to Pinpoint Test D

Pinpoint Tests

The Alarm System Does Not Activate From An Unauthorized Entry At The Hood


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

Normal Operations and Fault Conditions


REFER to: Perimeter Anti-Theft Alarm - System Operation and Component Description (419-01A Perimeter Anti-Theft Alarm, Description and Operation).

Possible Sources

  • Wiring, terminals or connectors
  • Hood latch
  • BCM

Visual Inspection and Diagnostic Pre-checks

  • Inspect the hood latch for damage.

PINPOINT TEST A: THE ALARM SYSTEM DOES NOT ACTIVATE FROM AN UNAUTHORIZED ENTRY AT THE HOOD
A1 MONITOR THE BCM (BODY CONTROL MODULE) HOOD AJAR SWITCH (HOOD_SW) PID (PARAMETER IDENTIFICATION)
  • Ignition ON.
  • Using a diagnostic scan tool, view the BCM Parameter Identifications (PIDs).
  • Using a diagnostic scan tool, monitor the BCM HOOD_SW PID .
  • Disconnect: Hood Ajar Switch C127.

Does the PID read AJAR when the switch is disconnected?
Yes INSTALL a new hood latch.
REFER to: Hood Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).
No GO to A2

A2 CHECK THE HOOD AJAR SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C127-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to A3
No REPAIR the circuit.

A3 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM 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 all 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 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.


The Alarm System Does Not Activate From The Intrusion Sensor


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

Normal Operations and Fault Conditions


REFER to: Perimeter Anti-Theft Alarm - System Operation and Component Description (419-01A Perimeter Anti-Theft Alarm, Description and Operation).


  BCM DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B109F:01 Intrusion Sensor Module: General Electrical Failure Sets when the BCM detects a short to ground from the intrusion sensor LIN circuit.
B109F:02 Intrusion Sensor Module: General Signal Failure Sets when the BCM detects a communication fault with the intrusion sensor.
B109F:08 Intrusion Sensor Module: Bus Signal / Message Failure Sets when the BCM detects a communication fault with the intrusion sensor.
B109F:97 Intrusion Sensor Module: Component or System Operation Obstructed or Blocked Set by the BCM when the intrusion sensor is blocked, has an internal wiring fault between the intrusion sensor module and ultrasonic pulse producers, or has stopped working.
B109F:9A Intrusion Sensor Module: Component or System Operating Conditions Sets when the BCM detects a communication fault with the intrusion sensor.
B11D9:09 Vehicle Battery: Component Failure Set by the BCM when a battery failure is detected.

Possible Sources

  • Wiring, terminals or connectors
  • Intrusion sensor
  • BCM

Visual Inspection and Diagnostic Pre-checks

Verify the BCM fuse 11 (5A) is OK.


PINPOINT TEST B: THE ALARM SYSTEM DOES NOT ACTIVATE FROM THE INTRUSION SENSOR
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
B1 CHECK FOR VOLTAGE TO THE INTRUSION SENSOR
  • Ignition OFF.
  • Disconnect: Intrusion Sensor C9800.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C9800-1   Ground

Is the voltage greater than 11 volts?
Yes GO to B3
No GO to B2

B2 CHECK THE INTRUSION SENSOR VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Disconnect: BCM C2280C.
  • Disconnect: Keyless Entry Keypad C500.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C9800-1   C2280C-15

Is the resistance less than 3 ohms?
Yes GO to B7
No REPAIR the circuit.

B3 CHECK THE INTRUSION SENSOR GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C9800-1   C9800-3

Is the voltage greater than 11 volts?
Yes GO to B4
No REPAIR the circuit.

B4 CHECK THE INTRUSION SENSOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE
  • Disconnect: BCM C2280E.
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C9800-2   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to B5

B5 CHECK THE INTRUSION SENSOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C9800-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to B6
No REPAIR the circuit.

B6 CHECK THE INTRUSION SENSOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C9800-2   C2280E-36

Is the resistance less than 3 ohms?
Yes INSTALL a new intrusion sensor.
REFER to: Intrusion Sensor (419-01A Perimeter Anti-Theft Alarm, Removal and Installation). TEST the system for normal operation. If the concern is still present, GO to B7
No REPAIR the circuit.

B7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all the BCM 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. 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.


The Alarm System Does Not Arm Or No Turn Signals Flash Confirmation


Refer to Wiring Diagrams Cell 95 for schematic and connector information.

Normal Operations and Fault Conditions


REFER to: Perimeter Anti-Theft Alarm - System Operation and Component Description (419-01A Perimeter Anti-Theft Alarm, Description and Operation).

Possible Sources

  • Door ajar switch input
  • Hood ajar switch input
  • Liftgate ajar switch output
  • Turn signal output
  • RKE transmitter concern
  • BCM

PINPOINT TEST C: THE ALARM SYSTEM DOES NOT ARM OR NO TURN SIGNALS FLASH CONFIRMATION
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
C1 CHECK FOR BCM (BODY CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) B1305:01

NOTE: DTC B1305:01 sets if the hood is open. Make sure the hood is closed prior to running the self-test.

  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.

Is DTC B1305:01 present?
Yes GO to Pinpoint Test D
No GO to C2

C2 CHECK THE DOOR AND LIFTGATE AJAR SWITCH INPUTS
  • Close all the doors and liftgate.
  • Observe the IPC .

Does the IPC indicate a door or the liftgate is ajar?
Yes
REFER to: Instrumentation, Message Center and Warning Chimes - Vehicles With: Head Up Display (HUD) (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
See "The Door, Hood Or Liftgate Ajar Warning Indicator Is Never Or Always On."
No GO to C3

C3 VERIFY THE HAZARD FLASHER LAMP OPERATION
  • Ignition OFF.
  • Activate the hazard flasher lamp function and observe the turn signals.

Do all the turn signals flash on and off?
Yes GO to C4
No DIAGNOSE the inoperative turn signals.
REFER to: Turn Signal and Hazard Lamps (417-01 Exterior Lighting, Diagnosis and Testing).

C4 CHECK THE RKE (REMOTE KEYLESS ENTRY) TRANSMITTER FUNCTION
  • Using the RKE transmitter, lock and unlock the doors.

Do the doors lock and unlock?
Yes GO to C5
No DIAGNOSE the inoperative RKE transmitter.
REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).

C5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all the BCM 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. 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.


B1305:01


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

Normal Operations and Fault Conditions


REFER to: Perimeter Anti-Theft Alarm - System Operation and Component Description (419-01A Perimeter Anti-Theft Alarm, Description and Operation).


  BCM DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B1305:01 Hood Switch: General Electrical Failure Sets when the BCM detects an open from the hood ajar switch input during a self-test. This DTC also sets if the self-test is carried out with the hood open.

Possible Sources

  • Wiring, terminals or connectors
  • Hood latch
  • BCM

Visual Inspection and Diagnostic Pre-checks

  • Inspect the hood latch for damage.

PINPOINT TEST D: B1305:01
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
D1 CHECK THE HOOD AJAR SWITCH
  • Disconnect: Hood Ajar Switch C127.
  • Ignition ON.
  • Connect:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C127-2   C127-1
  • Using a diagnostic scan tool, perform the BCM self-test.

Is DTC B1305:01 still present?
Yes REMOVE the fused jumper wire. GO to D2
No REMOVE the fused jumper wire. INSTALL a new hood latch.
REFER to: Hood Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).

D2 CHECK THE HOOD AJAR SWITCH GROUND CIRCUIT FOR AN OPEN
  • Connect a fused jumper wire:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C127-2   Ground
  • Using a diagnostic scan tool, perform the BCM self-test.

Is DTC B1305:01 still present?
Yes REMOVE the fused jumper wire. GO to D3
No REMOVE the fused jumper wire. REPAIR the circuit.

D3 CHECK THE HOOD AJAR SWITCH INPUT CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C127-2   C2280F-14

Is the resistance less than 3 ohms?
Yes GO to D4
No REPAIR the circuit.

D4 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all the BCM 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. 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.


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