Diagnostic Procedure

Check for Diagnostic Trouble Codes (DTCs). See RETRIEVING DIAGNOSTIC TROUBLE CODES (DTCS)  . If no DTCs exist, proceed to TROUBLE SHOOTING  and diagnose vehicle by symptom. If DTCs exist, go to TESTING - MEMORY SEAT MODULE (MSM) DIAGNOSTIC TROUBLE CODES (DTCs)  or TESTING - MEMORY MIRROR MODULE (MMM) DIAGNOSTIC TROUBLE CODES  and perform appropriate DTC test. After repair is complete, clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES (DTCS)  . Recheck system operation.