Diagnostic Test
- CHECK FOR AN ACTIVE DTC
- Turn the ignition on.
- With the scan tool, read Adaptive Cruise Control (ACC) Module DTCs and record on the repair order.
- With the scan tool, erase ACC Module DTCs.
- Turn the ignition off.
- Start the engine.
- Activate the ACC.
- With the scan tool, read ACC Module DTCs.
Is the DTC active?
Yes
- Go To 2
No
- Go To 4
- CHECK FOR BODY CONTROL MODULE (BCM) DTCS
- With the scan tool, read BCM DTCs and record on the repair order.
Are there any BCM DTCs present?
Yes
- Repair the BCM DTC(s). Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX .
No
- Go To 3
- With the scan tool, read BCM DTCs and record on the repair order.
- CHECK OTHER MODULES FOR DTCS
- With the scan tool, read DTCs.
Are there any other modules reporting communication DTCs against the BCM?
Yes
- Replace and program the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
No
- Using the schematics as a guide, check the ACC Module pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the Adaptive Cruise Control (ACC) Module in accordance with the Service Information. Refer to MODULE, ADAPTIVE CRUISE CONTROL (ACCM), REMOVAL .
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- With the scan tool, read DTCs.
- CHECK THE WIRING AND CONNECTORS
- The conditions necessary to set the DTC are not present at this time.
- Using the schematics as a guide, inspect the wiring and connectors specific to this Module. Wiggle the wiring and connectors while checking for shorted and open circuits.
- Check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Check Service Bulletins for any possible causes that may apply.
Were there any problems found?
Yes
- Repair as necessary.
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Test complete.