Auto-Cruise Control System Diagnostic Troubleshooting Strategy

WARNING: This page is about a different car, the 2004 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.

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 but no auto-cruise control system DTCs are set, and the malfunction may be intermittent. Refer to How to Use Troubleshooting/Inspection Service Points - HOW TO COPE WITH INTERMITTENT MALFUNCTION .
If you can verify the condition but there are no auto-cruise control system DTCs, or the system cannot communicate with scan tool MB991958, refer to SYMPTOM CHART and find the fault.
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 .