October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Self-Diagnostic System: Summary

If no hard DTCs are present, and driveability symptoms or intermittent DTCs exist, diagnose system by verifying electronic control system circuit operation. This may be accomplished by using scan tool to compare actual circuit data values to typical manufacturer specified data values. Refer to scan tool manufacturer's instruction manual.