Diagnostic Test
- 1) DTC IS ACTIVE NOTE: To help in the service of the Adaptive Cruise Control (ACC) System, it is recommended speaking to the customer to find out what type of environment they were driving in when the cruise concern took place. Heavy rain, snow, ice and fog can cause the ACC system to become unavailable. This should be considered normal operation and no repair is necessary.
With a scan tool, select View DTCs.
Is the DTC active at this time?
Yes
- Go To 2).
No
- No repair is necessary. Ensure the lens is free of dirt, damage or other obstruction. Clear the DTC and verify the proper operation of the ACC system.
- 2) PCM DTC IS ACTIVE
With a scan tool, read the PCM DTCs.
Are there PCM DTC(s) present?
Yes
- Refer to the ENGINE DIAGNOSTIC SECTION and perform the appropriate test.
No
- The ACC Module has detected the ambient temperature above operating range. Once the temperature has decreased below 85°C (185°F) ACC operation will be restored.