DTC Confirmation Procedure
NOTE:
Perform all test steps.
- Record Continuous Memory DTC & Freeze Frame Data
Turn ignition on with engine off. Connect scan tool to DLC. Retrieve all stored DTCs. Observe and record all DTCs. Go to next step. - Verify Related Repair Information
Check for any related Technical Service Bulletins (TSBs). If any TSBs apply, perform indicated repair. If vehicle is now repaired, procedure is complete. If no TSBs apply, go to next step. - Perform Key On Engine Off (KOEO) Self-Test
Start engine and allow to reach normal operating temperature. Turn off all electrical accessories. Perform KOEO Self-Test procedure. If any DTCs are present, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, go to next step. - Perform Key On Engine Running (KOER) Self-Test
Start engine. Perform KOER Self-Test procedure. If any DTCs are present, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, go to next step. - If Continuous Memory DTCs are present in first step, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If Continuous Memory DTCs are not present, proceed to TROUBLE SHOOTING - NO CODES article for diagnosis by symptom.