Diagnostic Test
- CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
- Turn the ignition on.
- With the scan tool, read Body Control Module (BCM) DTCs and record on the repair order.
- Record the Environmental Data.
- With the scan tool, erase DTCs.
- Turn the ignition off.
- Wait 10 seconds.
- Turn the ignition on.
- Press and release the Speed Control Switches three times.
- With the scan tool, read BCM DTCs.
Did the DTC return?
Yes
- Go To 2
No
- Test complete. The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- CHECK THE RIGHT STEERING WHEEL (SPEED CONTROL) SWITCH NOTE:
Inspect the wiring harness between the SCM and Right Steering Wheel (Speed Control) Switch for any damage or loose connections. Repair as necessary.
- Turn the ignition off.
- Disconnect the Right Steering Wheel Switch harness connector.
- Turn the ignition on.
- With the scan tool, erase DTCs.
- Turn the ignition off.
- Wait 10 seconds.
- Turn the ignition on.
- With the scan tool, read BCM DTCs.
Did the DTC return?
Yes
- Go To 3
No
- Replace the Right Steering Wheel Switch in accordance with the Service Information. Refer to SWITCH, SPEED CONTROL, REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- CHECK THE (V72) S/C SIGNAL 2 CIRCUIT FOR A SHORT TO GROUND BETWEEN THE SCM AND RIGHT STEERING WHEEL SWITCH
- Turn the ignition off.
- Disconnect the SCM C4 harness connector.
- Check for continuity between ground and the (V72) S/C Signal 2 circuit at the SCM C4 harness connector.
Is there continuity between ground and the (V72) S/C Signal 2 circuit?
Yes
- Repair the (V72) S/C Signal 2 circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go To 4
- CHECK THE (V72) S/C SIGNAL 2 CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT AT THE SCM C4 HARNESS CONNECTOR
- Check for continuity between the (V72) S/C Signal 2 circuit all other circuits at the SCM C4 harness connector.
Is there continuity between the (V72) S/C Signal 2 circuit and any other circuit?
Yes
- Repair the short between the circuits that have continuity. Use the wiring diagram as a guide to trace the circuits and look for any in-line connectors to help isolate the location of the short.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go To 5
- Check for continuity between the (V72) S/C Signal 2 circuit all other circuits at the SCM C4 harness connector.
- CHECK THE STEERING CONTROL MODULE (SCM) NOTE:
Disregard any additional Steering Column DTCs that may set when performing this step.
- Turn the ignition off.
- Disconnect the SCM C1 harness connector.
- Turn the ignition on.
- With the scan tool, erase DTCs.
- Turn the ignition off.
- Wait 10 seconds.
- Turn the ignition on.
- With the scan tool, read BCM DTCs.
Did the DTC return?
Yes
- Go To 6
No
- Replace the SCM in accordance with the Service Information. Refer to CLOCKSPRING, REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- CHECK THE (V72) S/C SIGNAL 2 CIRCUIT FOR A SHORT TO GROUND BETWEEN THE BCM AND SCM
- Turn the ignition off.
- Disconnect the BCM C4 harness connector.
- Check for continuity between ground and the (V72) S/C Signal 2 circuit at the SCM C1 harness connector.
Is there continuity between ground and the (V72) S/C Signal 2 circuit?
Yes
- Repair the (V72) S/C Signal 2 circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go To 7
- CHECK THE (V72) S/C SIGNAL 2 CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT AT THE SCM C1 HARNESS CONNECTOR
- Check for continuity between the (V72) S/C Signal 2 circuit all other circuits at the SCM C1 harness connector.
Is there continuity between the (V72) S/C Signal 2 circuit and any other circuit?
Yes
- Repair the short between the circuits that have continuity. Use the wiring diagram as a guide to trace the circuits and look for any in-line connectors to help isolate the location of the short.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Replace Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), EMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- Check for continuity between the (V72) S/C Signal 2 circuit all other circuits at the SCM C1 harness connector.