Diagnostic Test
- VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE:
Diagnose all communication DTCs before continuing.
- Ignition on, engine not running.
- Using a scan tool, read ACC DTCs.
Is the DTC active at this time?
Yes
- Go To 2
No
- The conditions that caused this code to set are not present at this time. Using the appropriate wiring diagram/schematic as a guide, inspect the wiring and connectors, pay particulate attention the CAN circuits.
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- CHECK FOR ACTIVE OR STORED COMMUNICATION DTCs IN TIPM
- Using a scan tool, read TIPM DTCs.
Are any active or stored Communication DTCs set in the TIPM?
Yes
- Refer to TOTALLY INTEGRATED POWER MODULE (TIPM) - DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure.
No
Go To 3
- Using a scan tool, read TIPM DTCs.
- TIPM COMMUNICATION RELATED DTCs IN OTHER MODULES
- With the scan tool, select Network Diagnostics.
Is there more than one module with active DTCs "Logged Against" the TIPM at this time?
Yes
- Replace and program the Totally Integrated Power Module (TIPM) in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Replace and program the ACC Module in accordance with the Service Information.
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- With the scan tool, select Network Diagnostics.