System Operation
System Diagram - Gauges
*.sttxt { visibility: hidden; } *.stcallout { visibility: visible; } 1 PCM 2 GWM 3 Fuel Pump and Sender Unit 4 IPC 5 Speedometer 6 Tachometer 7 Temperature 8 Fuel E367343Item | Description |
---|---|
1 | PCM |
2 | GWM |
3 | Fuel pump and sender unit |
4 | IPC |
5 | Speedometer |
6 | Tachometer |
7 | Temperature |
8 | Fuel |
Network Message Chart - Gauges
The data on each gauge is displayed when the IPC receives messaged inputs from other modules on the CAN . The IPC communcates on the HS-CAN3 . If the originating module communicates on a network other than the HS-CAN3 , the messaged signals will be sent to the GWM first, then to the IPC .
Gauge | Network Message | Originating Module | Originating CAN | Receiving Module |
---|---|---|---|---|
Engine temperature (virtual) | Engine coolant temperature data | PCM | FD-CAN | IPC |
Engine overheat indication request | ||||
Fuel (virtual) | Fuel level data | IPC | HS-CAN3 | PCM |
Fuel level display | PCM | FD-CAN | IPC | |
Speedometer (virtual) | Vehicle speed | PCM | FD-CAN | IPC |
Tachometer (virtual) | Engine rpm data | PCM | FD-CAN | IPC |
System Diagram - RTT Indicators
RTT Indicators
*.sttxt { visibility: hidden; } *.stcallout { visibility: visible; } 1 Engine Oil Pressure Sensor 2 Parking Brake Switch 3 Brake Fluid Level Switch 4 Door/Hood Ajar Switches 5 Liftgate Ajar Switch 6 Driver/Passenger Seatbelt Buckle 7 PCM 8 TCCM 9 ABS Module 10 IPMA 11 SODx 12 CCM 13 BCM 14 RCM 15 GSM 16 GWM 17 Washer Fluid Level Sensor 18 Fuel Pump and Sender Unit 19 IPC 20 RTTs E367344Item | Description |
---|---|
1 | Engine oil pressure sensor |
2 | Parking brake switch |
3 | Brake fluid level switch |
4 | Door/hood ajar switches |
5 | Liftgate ajar switch |
6 | Driver/passenger seatbelt buckle |
7 | PCM |
8 | TCCM |
9 | ABS module |
10 | IPMA |
11 | Side Obstacle Detection Control Module x (SODx) |
12 | CCM |
13 | BCM |
14 | RCM |
15 | GSM |
16 | GWM |
17 | Washer fluid level sensor |
18 | Fuel pump and sender unit |
19 | IPC |
20 | Reconfigurable Telltales (RTTs) |
Reconfigurable Telltales (RTTs)
Item | Description |
---|---|
1 | 4WD Reconfigurable Telltales (RTTs) (2H, 4H, 4L, 4A) |
2 | ABS |
3 | Airbag |
4 | Auto high beam/Adaptive high beam |
5 | Auto hold |
6 | Auto stop-start |
7 | Auto tow haul |
8 | BLIS off |
9 | Brake warning |
10 | Charging system |
11 | Cruise control/adaptive cruise control |
12 | Distance indication (Selected Calm screen only) |
13 | Door ajar |
14 | Hood ajar |
15 | Liftgate ajar |
16 | Electric park brake |
17 | ELD |
18 | Engine over-temperature |
19 | Engineering test mode (ETM) |
20 | Forward collision system warning |
21 | Front fog lamps |
22 | High beams |
23 | Hill descent control ready |
24 | Lane centering aid |
25 | Lane keeping system |
26 | LED low beam malfunction |
27 | Lights on |
28 | Low fuel |
29 | Low engine oil pressure |
30 | Low washer fluid |
31 | MIL (check engine) |
32 | Overspeed warning (Gulf Cooperative Countries [GCC]) |
33 | Powertrain malfunction (wrench) |
34 | Progressive range select |
35 | Rear fog lamp (China only) |
36 | Seatbelt/Belt-Minder |
37 | Speed sign |
38 | Stability-traction control (sliding car icon) |
39 | Stability-traction control disabled (sliding car OFF icon) |
40 | TPMS |
41 | LH / RH turn indicator |
42 | IPC |
Network Message Chart - Indicators and Reconfigurable Telltales (RTTs)
The telltales and Reconfigurable Telltales (RTTs) are illuminated or displayed in the IPC when the IPC receives messaged inputs from other modules on the CAN , due to system faults detected, system status changes or for driver information. The IPC communcates on the HS-CAN3 . If the originating module communicates on a network other than the HS-CAN3 , the messaged signals are sent to the GWM first, then to the IPC .
Indicator | Telltale/RTT (T, RTT or Both) | Network Message | Originating Module | Originating CAN | Receiving Module |
---|---|---|---|---|---|
ABS warning | RTT | ABS warning indicator request | ABS module | FD-CAN | IPC |
Airbag warning | RTT | Airbag waring indicator status | RCM | HS-CAN2 | IPC |
Auto/adaptive high beam | RTT | Auto high beam indicator request | IPMA | FD-CAN | IPC |
Auto hold | RTT | Auto hold mode indicator | ABS module | FD-CAN | IPC |
Auto stop/start | RTT | Stop-start standby indicator | PCM | FD-CAN | IPC |
Auto tow haul | RTT |
|
PCM | FD-CAN | IPC |
Auto tow allow request menu | IPC | HS-CAN3 | PCM | ||
BLIS off | RTT |
|
IPMA | FD-CAN | IPC |
|
|||||
Brake warning/low brake fluid warning/parking brake | RTT | Brake (red) warning indicator request | ABS module | FD-CAN | IPC |
Park brake active status | |||||
Brake fluid level status | ABS module | FD-CAN | BCM | ||
Brake warning indicator request (brake fluid level) | BCM | HS-CAN1 | IPC | ||
Charging system warning | RTT | Battery low state of charge | BCM | HS-CAN1 | IPC |
Cruise control/ACC /set speed display | RTT |
|
PCM | FD-CAN | IPC |
Distance indication | RTT | Forward distance alert warning indicator request | IPMA | FD-CAN | IPC |
Door, hood, liftgate ajar | RTT |
|
BCM | HS-CAN1 | IPC |
ELD (eLocker) | RTT | Rear differential lock indicator request | PCM | FD-CAN | IPC |
Electric parking brake | RTT | Parking brake (yellow) lamp request | ABS module | FD-CAN | IPC |
Engine over-temperature | RTT |
|
PCM | FD-CAN | IPC |
Forward collision warning off | RTT | Forward collision warning indicator request | IPMA | FD-CAN | IPC |
Four-wheel drive | RTT |
|
TCCM | FD-CAN | IPC |
Front fog lamp | RTT | Front fog lamp indicator request | BCM | HS-CAN1 | IPC |
High beam | RTT | Headlamp high beam status | BCM | HS-CAN1 | IPC |
Hill descent control ready | RTT | Hill descent mode | ABS module | FD-CAN | IPC |
Lane Centering Aid (LCA) | RTT | Traffic jam assist status | IPMA | FD-CAN | IPC |
Lane Keeping System (LKS) | RTT | Lane keeping system status display | IPMA | FD-CAN | IPC |
LED low beam malfunction | RTT | Headlamp low beam out | BCM | HS-CAN1 | IPC |
Lights on | RTT | Parklamp status | BCM | HS-CAN1 | IPC |
Low fuel warning | RTT | Fuel level data | IPC | HS-CAN3 | PCM |
|
PCM | FD-CAN | IPC | ||
Low engine oil pressure | RTT |
|
PCM | FD-CAN | IPC |
MIL (check engine) | RTT | MIL request | PCM | FD-CAN | IPC |
Overspeed warning (Gulf Cooperative Countries [GCC]) | RTT | Vehicle speed | PCM | FD-CAN | IPC |
Powertrain malfunction (wrench) warning | RTT |
|
PCM | FD-CAN | IPC |
4WD service required | TCCM | FD-CAN | |||
Body service required | BCM | HS-CAN1 | |||
Gearshift module service required | GSM | HS-CAN2 | |||
Progressive range select | RTT |
|
PCM | FD-CAN | IPC |
Rear fog lamp (China only) | RTT | Rear fog lamp indicator request | BCM | HS-CAN1 | IPC |
Seatbelt/Belt-Minder | RTT |
|
RCM | HS-CAN2 | IPC |
Speed sign recognition | RTT | Traffic sign recognition status request | IPMA | FD-CAN | IPC |
Stability-traction control (sliding car icon) | RTT | Stability-traction control indicator request | ABS module | FD-CAN | IPC |
Stability-traction control disabled (sliding car OFF icon) | RTT | Stability-traction control disabled indicator request | ABS module | FD-CAN | IPC |
TPMS | RTT | Tire pressure warning indicator | BCM | HS-CAN1 | IPC |
Turn indicator (LH / RH ) | RTT |
|
BCM | HS-CAN1 | IPC |
Networked Input Messages and Default States
NOTE: Whenever a network message is suspected as missing and confirmed by a missing message DTC (U-code), it is important to look for other symptoms that can also be present in the IPC and throughout the vehicle. Once a DTC sets in the IPC , it is helpful to review the complete message list to determine which other modules also rely on the same message and run the self-test for those modules. If the message is missing from other modules, the same or similar lost communication DTC can also be set in those modules. Confirmation of missing messages common to multiple modules can indicate the originating module is the source of the concern or the communication network may be at fault.
For a list of all the network messages,
Refer to: Controller
Area Network (CAN) Module Communications Network - System Operation and
Component Description (418-00A Controller Area Network (CAN) Module
Communications Network, Description and Operation).
The IPC uses input messages from other modules to control the gauges, informational indicators, warning indicators and message center message displays over the communication networks. The IPC receives all networked data over the HS-CAN3 .
The vehicle uses 5 communication networks to transmit the data used by the IPC .
For additional information,
Refer to: Controller Area Network
(CAN) Module Communications Network - System Operation and Component
Description (418-00A Controller Area Network (CAN) Module Communications
Network, Description and Operation).
All messaged inputs to the IPC from other networks are received from the GWM over the HS-CAN3 . The GWM acts as a gateway to convert messages from one of the other networks to the HS-CAN3 , which is recognized by the IPC .
Network messages can drop out or be missing for a variety of reasons, such as high network traffic on the bus. The IPC incorporates a defined strategy for handling missing network messages based on time. The strategy is basically the same for all indication outputs (gauges, indicators or chimes), but differs in the length of time required for the network message to be missing. If a required network message is missing or invalid for less than the programmed length of time, the gauge, indicator or message center display that requires the network message remains at the last commanded state based upon the last network message received. If the messaged input is missing for longer than the programmed length of time, the IPC output (gauge, indicator etc.) reacts according to a pre-defined default action.
Refer to the diagnostic overview descriptions located before each pinpoint test for further descriptions of the default action specific to each indicator or gauge. If the missing messaged input to the IPC returns at any time, the normal function of the gauge, indicator or message center display resumes.
Over-The-Air (OTA) Updates
The IPC is capable of receiving software updates through a cellular or WiFi connection to the vehicle. The software updates are sent to the TCU and then to the enhanced central gateway (ECG), or GWM . The GWM sends the software update data to the IPC over the HS-CAN3 or through a pair of ethernet cable circuits connected to the IPC , depending upon the type of software update or IPC level. The ethernet cable connections are used for higher speed downloads and enhanced data security. The ethernet cables are color coded specifically for each module.
The ethernet connection is used for module software updates only, and not for receiving messaged data related to IPC function or driver information. If a module communication concern is detected, it will only affect the CAN connections to the IPC .
For certain types of software updates, certain vehicle functions will be unavailable while the updates are occurring, such as vehicle start, driving the vehicle, charging the vehicle (HEV ) or using the key fob to lock or unlock the vehicle. The vehicle owner can schedule the software updates for periods of vehicle non-use, or cancel the update prior to the software download. The vehicle owner will also be notified when an update is ready to download.
For additional information, REFER to Section 418-01B.
Startup-Shutdown
The IPC provides a startup/shutdown sequence also known as a welcome/goodbye strategy. The IPC initiates and follows a progressive strategy providing increasing IPC functionality from IPC wake up to ready to drive status. This sequence begins at RKE unlock or driver door open through the ignition RUN state. During this period, the IPC provides increasing functionality from backlighting or illuminating gauge rings, gauge pointers, illuminating the PRNDM, backlighting of the message center display, displaying a message center splash screen, gauge and LED prove out, gauge sweep and finally normal IPC operation.
MyKey® (North America)
The MyKey® feature allows the customer to program a restricted driving mode that is tied to one or more keys known as a MyKey® key. The following features are provided by the IPC when a MyKey® key is being used:
The following features are provided in the message center display when a MyKey® key is being used:
When an administrator key is in use, the following information is provided in the center touchscreen display:
For information on the MyKey® features, refer to the Owner's Literature.
MyKey® (China)
The MyKey® feature allows the customer to program a restricted driving mode that is tied to one or more keys known as a MyKey® key. The following features are provided by the IPC when a MyKey® key is being used:
The following features are provided in the message center display when a MyKey® key is being used:
When an administrator key is in use, the following information is provided in the center touchscreen display:
For information on the MyKey® features, refer to the Owner's Literature.
Dealer Test Mode (Engineering Test Mode)
To enter the IPC engineering test mode or dealer test mode, begin with the ignition off. Press and hold the RH steering wheel switch OK button. For push-button start vehicles, place the ignition on and continue to hold the button for 5-8 seconds until the display indicates Test or Gauge Sweep. Press the up or down arrow buttons to navigate through each of the display windows. To exit the IPC dealer test mode, press and hold the OK button for 5-8 seconds or place the ignition in off.
Gauges (Virtual)
Engine Temperature
The IPC uses 2 messages to control the temperature gauge. The first is the engine coolant temperature data, which provides the current engine temperature input to the PCM . The second message is the engine overheat indication request, which is sent by the PCM to the IPC when an overheating condition exists. When the IPC receives the engine overheat indication request message, the IPC sends the temperature gauge to full hot and turns on the over-temperature warning indicator.
Fuel
The IPC receives the fuel level data from a single fuel level sender. The IPC sends a reference voltage to the fuel level sender. As the fuel level changes, a float actuates the variable resistor fuel level sender,which will change the fuel level signal voltage. The IPC monitors the changes in voltage from the sender and sends a fuel level data message to the PCM through the GWM to calculate the fuel level.
The PCM calculates the fuel level based on current fuel volume in the fuel tank. The PCM sends the fuel level display message to the IPC to activate the needle in the fuel gauge.
After a fuel fill up, the time for the fuel gauge to move from empty (E) to full (F) ranges from 2 seconds to 55 minutes depending on which operating mode the fuel gauge is in.
The PCM uses 4 different operating modes to calculate the fuel level:
Anti-Slosh Mode
The default fuel gauge mode is called the anti-slosh mode. Anti-slosh mode prevents unexpected fuel gauge changes from fuel slosh (gauge instability due to changes in fuel sensor readings caused by fuel moving around in the tank). This could result in slow fuel gauge movement in fuel volume changes.
Key OFF Fueling Mode
The key OFF fueling mode (2 seconds to read empty [E] to full [F]) requires 3 conditions to be met:
If these conditions are not met, the fuel gauge stays in the anti-slosh mode, which results in a slow to read full (F) event.
Key ON Fueling Mode
In key ON fueling mode, a 30-second timer activates after the transmission is put into the PARK (P) or NEUTRAL (N) position. When the 30-second time has elapsed and at least 10% of the vehicle's fuel capacity has been added, the fuel gauge response time is 60 seconds to read from empty (E) to full (F). When the transmission is shifted out of PARK (P) or NEUTRAL (N), the fuel gauge strategy reverts to the anti-slosh mode. The key ON fueling mode prevents slow to read full events from happening if the customer refuels the vehicle with the ignition in the RUN mode.
The key ON fueling mode (approximately 60 seconds to read empty [E] to full [F]) requires the following conditions be met:
Speedometer
The IPC receives the vehicle speed data from the PCM . The PCM receives the wheel speed data from the ABS . The PCM uses axle ratio and tire size stored in the vehicle configuration file along with wheel speed inputs to generate a vehicle speed signal.
The IPC provides a tolerance that allows the speed indication to display between 3% below and 7% above the actual vehicle speed. This means that with an actual vehicle speed of 97 km/h (60 mph), the speedometer can indicate between 94-103 km/h (58-64 mph). Incorrect tire size or tire size configuration could potentially affect the speedometer accuracy.
Tachometer
The IPC uses engine rpm data from the PCM to display the current rpm in the gauge.
Indicators and Reconfigurable Telltales (RTTs)
NOTE: It is important to view each of the cluster options in the Overview to identify which IPC uses specific fixed location indicators.
Refer to: Instrument Panel Cluster (IPC) - Overview (413-01
Instrumentation, Message Center and Warning Chimes, Description and
Operation).
Prove-Out
The IPC carries out a display prove-out to verify the gauges function and all module controlled warning indicator lamps and monitored systems are functioning correctly within the IPC . Upon initiation of the prove-out, the gauges sweep from one stop to the other then return to the normal indication state based on the input received. The IPC also provides a timed prove-out of some indicators while other indicators illuminate upon engine start up or have no prove-out.
ABS Warning
If a fault condition exists in the ABS , the ABS module sends the ABS warning indicator request message to either flash or illuminate the ABS indicator or RTT warning indicator.
Refer to ABS /Brake/Stability-Traction Control System Indication description for information on the conditions when the ABS warning indicator is turned on.
ABS /Brake/Stability-Traction Control System Indication
The brake/stability-traction control system indication is controlled almost entirely by the ABS module. The ABS module can illuminate multiple indicators for various fault conditions. The following table provides a summary of the basic fault conditions and the indicators that are illuminated for each condition.
NOTE: Refer to the Normal Operation and Fault Condition description before each brake/stability-traction control system indicator Pinpoint Test for the IPC default action for network/missing message conditions.
Event/Fault Condition | ABS Indicator Status | Brake Warning Indicator Status | Electric Park Brake Indicator Status (Red) | Electric Park Brake Fault Indicator Status (Yellow) | Stability-Traction Control Indicator Status | Traction Control Disabled Indicator Status |
---|---|---|---|---|---|---|
Normal conditions | Off | Off | Off | Off | Off | Off |
Parking brake applied | Off |
|
Off | Off | Off | Off |
Low brake fluid level or brake fluid level input concern | Off | On | Off | Off | Off | Off |
Stability-traction control event - trailer sway | Off | Off | Off | Off | Flashing | Off |
Stability-traction control event - brake applied | Off | Off | Off | Off | Flashing | Off |
Stability-traction control disabled by driver | Off | Off | Off | Off | Off | On |
Single wheel speed sensor fault | On | Off | Off | Off | On | Off |
2 wheel speed sensor faults on the same axle or 3 wheel speed sensor faults | On | On | Off | On | On | Off |
ABS module fault | On | On | Off | Off | On | Off |
Park brake malfunction | Off | On | Flashing | On | Off | Off |
ABS disabled | On | On | Off | Off | On | Off |
All functions disabled | On | On | On | On | On | Off |
Steering wheel angle sensor center not found | Off | Off | Off | Off | On | Off |
ABS to CAN total failure |
|
On | Off | On | On | Off |
Electric park brake switch fault | Off | Off | Flashing | On | Off | Off |
Configuration mismatch | Off | Off | Off | Off | On | Off |
VIN mismatch | Off | Off | Off | Off | On | Off |
ACC and ABS both active | Off | Off | Off | Off | Flashing | Off |
Adaptive Cruise Control/Cruise Control
The IPC provides a cruise control RTT indicator when the cruise control or adaptive cruise control system is active or in standby mode.
Airbag Warning
The IPC provides the airbag warning RTT indicator if a SRS concern is detected. If a fault is detected in the airbag circuit, the RCM sets a DTC and the IPC illuminates the airbag warning RTT indicator.
Auto High Beam/Adaptive High Beam
The IPC provides the auto high beam or adaptive high beam RTT indicator to indicate the auto high beam or adaptive high beam is active.
Auto Hold
The IPC provides the auto hold RTT indicator to indicate the state of the auto hold feature. The auto hold feature holds a vehicle stationary once it has come to a stop using the brakes, allowing the driver to remove his or her foot from the brake pedal.
Auto Stop-Start
The IPC provides the auto stop-start RTT indicator, along with multiple messages displayed throughout the auto stop-start system operation, to inform the driver of the system status and to provide direction when driver intervention is required.
The auto stop-start indicator informs the driver of the following states:
Indicator State | System Status |
---|---|
Solid green | The auto stop-start feature has temporarily turned off the engine. |
Solid amber | A stop-start system concern exists. |
Flash in either green or amber | A system state as determined by the PCM . |
Auto Tow Haul
NOTE: Total combined vehicle mass data threshold is programmed at approximately 10,500 lbs (vehicle and trailer). If the total mass is below the 10,500 lb threshold, the transmission maintains the base shift points and the tow haul indicator remains off. Example: if the vehicle weight is 6,000 lbs and the trailer weight is below 4,500 lbs, the tow haul does not illuminate and the transmission shifts at the base shift points (no tow haul assist).
The tow haul RTT indicator illuminates when the tow haul system has been engaged and is actively providing tow haul control for the vehicle. There are two tow haul systems: with trailer tow and without trailer tow. The message center provides a menu on both systems allowing the driver to select OFF or AUTO. Both systems must determine there is a trailer connected using a programmed vehicle mass data threshold before the system engages and requests the IPC turn on the tow haul RTT indicator.
On vehicles equipped with trailer tow with AUTO selected, once the system determines a vehicle mass (trailer connected), the IPC illuminates the tow haul RTT indicator. If the driver stops and turns off the ignition (potential refueling or other event where the trailer remains connected), then turns on the ignition again the tow haul RTT indicator remains on and the system continues to provide tow haul control once it determines vehicle mass still meets criteria. If vehicle mass remains unchanged, the indicator remains on. If a change in vehicle mass is detected (trailer disconnected or a lighter trailer that doesn’t meet mass criteria), the system no longer provides tow haul control and the IPC turns off the tow haul RTT indicator.
On vehicles without trailer tow with AUTO selected, the tow haul system does not re-start in tow haul mode after an ignition cycle. The customer needs to drive enough for the tow haul system to relearn vehicle mass above the programmed threshold which can take several acceleration events to learn. Once the system determines the trailer is connected, the IPC turns on the tow haul RTT indicator.
When the driver enters the message center tow haul menu and changes the selection, the IPC sends the auto tow allow request menu message to the PCM . Once the PCM acts upon the request to change state, the PCM sends the auto tow allow status menu message to the IPC .
When the system is actively providing tow haul control, the PCM sends the auto tow active status message to the IPC to illuminate the auto tow haul RTT indicator.
Blind Spot Monitoring System (BLIS®) Off
The IPC provides a BLIS off RTT indicator to inform the driver the BLIS is turned off.
Brake Warning
The brake warning RTT indicator informs the driver the brake fluid level is low, there is a failure in the base brake system or the parking brake is applied. The IPC uses messaged inputs to control the brake warning RTT indicator.
Refer to ABS /Brake/Stability-Traction Control System Indication description for information on the conditions when the brake warning RTT indicator is turned on.
Charge Warning (12-Volt Battery)
The IPC provides a charging system RTT indicator along with message displays indicating the charging system status. When a fault is present in the charging system, the BCM sends the battery low state of charge message to the IPC to display message center warning messages and the charging system RTT indicator.
Door Ajar, Hood Ajar Or Liftgate Ajar Warning
The IPC provides a door ajar warning RTT indicator along with message displays to indicate the status of the doors, hood and liftgate. The BCM monitors each of the ajar inputs and sends the specific door ajar status message to the IPC to display the ajar warning RTT indicator and corresponding warning message.
Distance Indication
The IPC provides a distance indication RTT indicator when the Calm screen feature is selected, and other indication displays are not visible. The distance indication RTT indicator informs the driver that the vehicle is approaching a vehicle in front and the system determined the distance between vehicles is too close.
ELD Indicator
The ELD indicator informs the driver the locking differential is engaged.
Electric Park Brake
The electric park brake RTT indicator illuminates when a fault in the electric park brake system is detected.
Engine Over-Temperature
The IPC provides a RTT warning indicator to alert the driver the engine is over temperature.
Fog Lamp - Front
The IPC provides a front fog lamp RTT indicator to indicate when the front fog lamps are on.
Fog Lamp - Rear (China Only)
The IPC provides a rear fog lamp RTT indicator to indicate when the rear fog lamps are on.
Forward Collision System
The IPC provides a RTT warning indicator to alert the driver the forward collision warning system is unavailable or a fault is detected, disabling the system.
Four Wheel Drive System
The IPC provides a RTT indicator for each 4WD position selected: 2H, 4H, 4L, 4A.
High Beam
The high beam RTT indicator informs the driver the high beams are on.
Hill Descent Control
The IPC provides a hill descent control RTT indicator to indicate when the HDC is in ready mode, active control mode, or in an over-temperature mode with the system cooling.
Lane Centering Aid
The IPC provides the lane centering aid on RTT indicator to indicate the lane centering aid has been turned on, is active or in standby mode. The RTT indicator changes colors to indicate system status.
Lane Keeping System
The IPC provides the lane keeping system on RTT indicator to indicate the lane keeping system has been turned on, is active or in standby mode. The RTT indicator changes colors to indicate system status.
LED Low Beam Malfunction
The IPC provides the LED low beam malfunction RTT indicator to indicate a fault in the LED lighting system.
Lights On
When the parking lamps are turned on, the BCM sends the park lamp status to the IPC to illuminate the lights on RTT indicator.
Low Engine Oil Pressure
The IPC uses the engine oil pressure warning indicator request and engine RPM data from the PCM to control the low engine oil pressure RTT indicator. The engine oil pressure sensor is hardwired to the PCM . The IPC requires engine RPM above 400 RPM before the message center displays the low engine oil pressure warning.
Low Fuel
To supplement the fuel gauge indication, the IPC provides the low fuel warning RTT indicator.
The IPC uses the low fuel warning indicator request message sent from the PCM to the IPC to control the low fuel warning RTT indicator.
When the DTE is 120 km (75 miles) (for MyKey®) and 80 km (50 miles), 40 km (25 miles), 20 km (10 miles) and 0 km (0 miles) for all keys, the low fuel RTT indicator illuminates.
Low Washer Fluid Level
The low washer fluid level switch is hardwired to the IPC through a single signal circuit and is grounded through a separate ground circuit. The IPC provides a reference voltage to the washer fluid level switch. When the washer fluid is low, the washer fluid level switch closes, pulling the reference voltage low, and the IPC illuminates the low washer fluid level RTT indicator.
MIL (Check Engine)
The IPC provides the MIL or check engine lamp RTT indicator when a fault in the engine or the powertrain system is detected.
Overspeed Warning (Gulf Cooperative Countries [GCC])
The IPC provides an overspeed warning RTT indicator when the vehicle speed has reached or exceeded the 120 km/h (75 mph) threshold.
Powertrain Malfunction (Wrench) Warning
The IPC provides a powertrain malfunction (wrench) RTT warning indicator to indicate a:
Progressive Range Select
The IPC provides the progressive range select RTT indicator to display each selected transmission gear position.
Seatbelts/Belt-Minder
The RCM monitors the driver and front passenger seatbelt positions through the seatbelt buckle switch. The RCM provides the driver and passenger seatbelt buckle status to the IPC to turn on or turn off the seatbelt warning RTT indicator.
Speed Sign Recognition
The speed signRTT indicates the speed limit recognized by the system as the current posted speed limit based on the last posted speed sign recognized. The IPC uses speed sign recognition data provided by the IPMA .
Stability-Traction Control (Sliding Car Icon)
The stability-traction control (sliding car icon) RTT indicator informs the driver of the current status of the stability and traction control systems. The stability-traction control indicator illuminates when a fault condition exists or when an active traction control or stability control event is occuring.
Refer to ABS /Brake/Stability-Traction Control System Indication description for information on the conditions when the stability-traction control indicator (sliding car icon) is turned on.
Traction Control Disabled (Sliding Car OFF Icon)
The stability-traction control is configured on/off from the console mounted switch. When the driver enables or disables the stability-traction control system, or when a system fault disables the stabillity traction control, the ABS module sends the traction control off indicator request message to the IPC to illuminate or turn off the stability-traction control disabled (sliding car OFF icon) RTT indicator based upon the system state.
Refer to ABS /Brake/Stability-Traction Control System Indication description for information on the conditions when the stability-traction control disabled indicator (sliding car OFF icon) is turned on.
When a MyKey® administrator has set the AdvanceTrac® feature to always on and a MyKey® programmed key is in use, the stability-traction control system cannot be disabled. The menu selection in the message center used to disable the stability-traction control system does not display when a MyKey® is in use, but remains active for the MyKey® administrator to select the AdvanceTrac® always on feature off. The stability-traction control indicator still functions normally to indicate a stability-traction control system fault and a stability-traction control active event.
TPMS Warning
If the BCM determines the tire pressure has exceeded the low tire pressure limits, the tire pressure warning indicator request message is sent to the IPC to illuminate the TPMS warning RTT indicator.
If a TPMS monitor or sensor fault condition exists, the BCM sends the tire pressure warning indicator request message to the IPC to flash the TPMS RTT warning indicator. The IPC flashes the TPMS RTT warning indicator for 75 seconds then turns the indicator on solid.
Turn Signal/Hazard
When the multifunction switch is in the LH or RH turn position or if the hazard switch is on, the BCM sends the left or right turn lamp on request to the IPC to flash the turn signal RTT indicator on and off.
Component Description
Brake Fluid Level Switch
The brake fluid level switch is mounted in the master cylinder reservoir and is hardwired to the ABS module through a single signal circuit and is grounded through a separate return circuit. The ABS module provides a reference voltage to the brake fluid level switch. When the brake fluid level is low the switch closes, pulling the reference voltage low. When the brake fluid level is high, the switch opens, sending the reference voltage high on the signal circuit to the ABS module.
Engine Oil Pressure Sensor
The engine oil pressure sensor is hardwired to the PCM through VREF, signal and return circuits. The PCM provides the sensor voltage supply on the VREF circuit and monitors the voltage changes through the signal and return circuits as the engine oil pressure changes.
Fuel Level Sender (Float and Card)
The fuel level sender is mounted to the fuel pump and sender unit. The fuel level sender is a dual sweep potentiometer style resistor connected to a float mechanism. Each sweep has multiple fingers that reduces intermittent loss of data. As the fuel level changes, the float rises or falls with the fuel level moving the sweep arm across the resistor wires. This movement either increases or decreases the resistance through the unit. The fuel level sensor resistance ranges from 180 ohms ± 4 ohms to 10 ohms ± 2 ohms. When the fuel level is low, the fuel level sensor resistance is high. When the fuel level is high, the fuel level sensor resistance is low.
The fuel pump and sender unit is hardwired to the IPC through separate signal and return circuits. The fuel level return circuits are grounded internally in the IPC . The IPC provides a reference voltage on the fuel level signal circuit. As the fuel level changes, the change in resistance raises or lowers the fuel level signal voltage depending on the resistance of the fuel level sender. The IPC converts the fuel level signals and sends them to the PCM through the GWM .
IPC
The IPC provides the driver with a system status and alerts the driver when certain conditions exist in the vehicle. The IPC receives the ignition status from the BCM through the GWM over the HS-CAN3 .
The IPC requires PMI when it is replaced.
Low Washer Fluid Level Switch
The low washer fluid switch is hardwired to the IPC through a single signal wire and is grounded to a body ground through a separate circuit. The IPC provides a reference voltage to the low washer fluid level switch. When the washer fluid level is low, the float drops closing the switch and pulling the reference voltage low. When the washer fluid level is high, the float lifts opening the circuit to the IPC and sending the reference voltage high.
Seatbelt Buckle Sensor
The seatbelt buckles contain integrated sensors that are Hall-effect switches. The seatbelt buckle sensors are serviced as one component with the seatbelt buckle. The seatbelt buckles are hard-wired inputs to the RCM . The RCM sends the seatbelt buckle status messages to the IPC .
Removal
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.
NOTE: Removal steps in this procedure may contain installation details.
With the vehicle in NEUTRAL, position it on a hoist.NOTICE: Do not use power tools to remove or install the stabilizer bar