:  Jan 30, 2008



Overview

Ride and handling optimization incorporates the terrain response system which links a number of modules around the vehicle to give the best combination of settings in the different systems.

For information on the description and operation of the system, refer to section 204-06 - Ride and Handling Optimization of the workshop manual.

Inspection and Verification

. Verify the customer concern.

. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
  • Tire condition, pressures, etc
  • Driveline components (correct installation, damage, etc)
  • Engine components (correct installation, damage, etc)
  • Transmission components (correct installation, damage, etc)
  • Suspension components (correct installation, damage, etc)
  • Fuses
  • Harnesses/Connectors
  • Terrain response module
  • Engine control module (ECM)
  • Transmission control module (TCM)
  • Transfer case control module
  • ABS control module
  • Rear differential control module
  • Dynamic suspension control module
  • Controller area network (CAN) circuits

. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index. Refer to the relevant section of the workshop manual.
  Make sure that all DTCs are cleared following rectification.
Make sure that all DTCs are cleared following rectification.

Symptom chart

Because the overall function of the system is dependent on sub-systems, it is possible to misinterpret displays in the message center as being terrain response faults when they are actually a result of a fault in one of the sub-systems.

Refer to the table below for help in deciding when to investigate terrain response faults and when the fault is likely to be in a sub-system.

Symptom Description Possible causes Action
Message center display indicating a sub-system fault The message center indicates to the driver that a fault has occurred and in which sub-system
  • Any sub-system fault supported by the message center
For details of the available messages, refer to the relevant section of the workshop manual. Carry out a complete vehicle DTC read and follow the diagnostic routine(s) indicated.
Message center display: System fault special programs not available, terrain response switch operation normal This message will display when a sub-system fault has occurred if the driver attempts to change the special program, and at each ignition on cycle for 5 seconds until the fault is rectified
  • Any sub-system fault supported by the message center
For details of the available messages, refer to the relevant section of the workshop manual. Carry out a complete vehicle DTC read and follow the diagnostic routine(s) indicated.
Message center display: System fault special programs not available, terrain response switch LEDs inoperative This combination of messages will display when a terrain response module or switch fault has occurred if the driver attempts to change the special program, and at each ignition on cycle for 5 seconds until the fault is rectified
  • Terrain response module fault
  • Terrain response switch fault
Check for DTCs (refer to the index below). Follow the diagnostic routine indicated.
Message center display: System fault special programs not available, ALL terrain response switch LEDs illuminated CAN circuit errors
  • CAN circuit: short circuit to ground
  • CAN circuit: short circuit to power
  • CAN circuit: high resistance
Carry out a complete vehicle DTC read and follow the diagnostic routine(s) indicated.
Special program changes not available User error
  • Engine not running
  • Rock crawl selected with transfer box in high range
  • Special program change attempted with ABS or DSC active This includes ABS cycling as part of HDC
  • Special program change attempted with an overheat condition present in the center or rear differential
Refer to the relevant section of the workshop manual. Make sure that the driver is familiar with the correct operation of the system.

DTC index

:
  Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

Also refer to section 206-09 - Anti-Lock Control - Traction Control of the workshop manual.

DTC Description Possible causes Action
C1A0046 Control module
  • Incorrect car configuration file (CCF) data received from instrument pack cluster (IPC) or CCF incorrectly configured.
  • Modulator installed to unrecognized vehicle configuration
  • Vehicle dynamics control module calibration/parameter memory failure (internal error)
Configure the module using the approved diagnostic system. Clear the DTC and check if the DTC resets after ignition reset following >10 seconds ignition on. If the above is correct and the DTC persists, renew the modulator. Refer to the warranty policy and procedures manual if a module is suspect.
C1A0196 LED
  • LED circuit short circuit to ground
  • High resistance
Check the LED and circuits. Refer to the electrical guides.
C1A0294 Rotary encoder stuck in intermediate position
  • Rotary switch detected between detents for more than 1 minute
Check the operation of the rotary switch.
U007388 Control module communication bus 'A' Off
  • CAN bus off
Refer to the Network Communications section of the workshop manual.
U010087 Lost communication with the ECM/PCM 'A'
  • CAN module status signals not received from the engine/powertrain control module (E/PCM) in the specified time
Refer to the Network Communications section of the workshop manual.
U010187 Lost communication with the TCM
  • CAN module status signals not received from the transmission control module TCM in the specified time
Refer to the Network Communications section of the workshop manual.
U010287 Lost communication with the transfer case control module
  • CAN module status signals not received from the TCCM in the specified time
Refer to the Network Communications section of the workshop manual.
U012287 Lost communication with vehicle dynamics control module
  • CAN module status signals not received from the VDM in the specified time
Refer to the Network Communications section of the workshop manual.
U013287 Lost communication with suspension control module 'A'
  • CAN module status signals not received from the ride level control module (RLM) in the specified time
Refer to the Network Communications section of the workshop manual.
U015587 Lost communication with the instrument panel cluster (IPC) control module
  • CAN minute counter signal not received from the instrument panel cluster in the specified time
Refer to the Network Communications section of the workshop manual.
U030055 Internal control module software incompatibility
  • Software incompatibility with ATCM
  • Not configured
Configure the module using the approved diagnostic system.
U040194 Invalid data received from the ECM/PCM 'A'
  • Engine management status signals received are inconsistent with the mode indicated
  • Engine management fault
Check for engine management DTCs. Refer to the relevant section of the workshop manual.
U040294 Invalid data received from the TCM
  • Transmission status signals received are inconsistent with the mode indicated
  • Transmission fault
Check for transmission DTCs. Refer to the relevant section of the workshop manual.
U040394 Invalid data received from the transfer case control module
  • Transfer case status signals received are inconsistent with the mode indicated
  • Transfer case fault
Check for transfer case DTCs. Refer to the relevant section of the workshop manual.
U041694 Invalid data received from the vehicle dynamics control module
  • Vehicle dynamics status signals received are inconsistent with the mode indicated
  • Vehicle dynamics system fault
Check for dynamic suspension DTCs. Refer to the relevant section of the workshop manual.
U042194 Invalid data received from suspension control module 'A'
  • Dynamic suspension system fault
Check for dynamic suspension DTCs. Refer to the relevant section of the workshop manual.
U1A034A Car config parameter
  • Vehicle configuration incorrect
  • Incorrect module installed
Configure the module using the approved diagnostic system.
U1A1449 CAN initialization failure
  • Internal electronic fault
Refer to the Network Communications section of the workshop manual.