Circuit Description
The instrument panel cluster (IPC) illuminates the Service 4-Wheel Steer indicator. The rear wheel steering control module sends a Class 2 serial data message to the IPC in order to command the indicator ON or OFF.
Diagnostic Aids
Check all connections between the IPC and the rear wheel steering control module for loose or damaged terminals or damaged wiring .Use of the Diagnostic System Check will help ensure that there are not other conditions or DTC's that will cause a loss of communication between modules.
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check-Rear Wheel Steering? | Go to Step 2 | |
Does the Service 4-Wheel Steer indicator illuminate for 2 seconds and then turn OFF? | Go to Step 3 | Go to Step 4 | |
3 |
Does the Service 4-Wheel Steer indicator turn ON? | Go to Step 5 | Go to Diagnostic Aids |
4 | Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console. Did you complete the replacement? | Go to Step 6 | |
5 |
Important: Perform the Learn Alignment procedure. Refer to in Wheel Alignment. Wheel Alignment Measurement Replace the rear wheel steering module. Refer to Rear Wheel Steering Control Module Replacement . Did you complete the replacement? | Go to Step 6 | |
6 |
Does the Service 4-Wheel Steer indicator illuminate for 2 seconds and then turn OFF? | System OK | Go to Step 3 |
