Auto-Cruise Control System Diagnostic Troubleshooting Strategy

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Use these steps to plan your diagnostic strategy. If you follow them carefully, you will check most of the possible causes of an auto-cruise control system problem.

Gather information from the customer.
Verify that the condition described by the customer exists.
Check the vehicle for any auto-cruise control system DTC.
If you can verify the condition and there are no auto-cruise control system DTCs, and the malfunction is intermittent, refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .
If you can verify the condition but there are no auto-cruise control system DTCs, or the system cannot communicate with the scan tool, check that the auto-cruise control system is operating properly.
- If the auto-cruise control system is operating properly, refer to DATA LIST REFERENCE TABLE .
- If the auto-cruise control system is operating properly, Refer to DIAGNOSTIC TROUBLE CODE CHART .
If there is an auto-cruise control system DTC, record the number of the code, then erase the code from vehicle memory using the scan tool.
Re-create the auto-cruise control system DTC set conditions to see if the same Auto-cruise Control System DTC will set again.
- If the same Auto-cruise Control System DTC sets again, perform the diagnostic procedures for the set code. Refer to DIAGNOSTIC TROUBLE CODE CHART .