Symptom Charts

This article is where all diagnosis begins in the Powertrain Control Module (PCM)/Secondary On board Diagnostic Module C (SOBDMC) Quick Test. If the Powertrain Control Module (PCM)/Secondary On board Diagnostic Module C (SOBDMC) Quick Test is completed and no DTCs are retrieved, the technician may be directed to the NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX . The No Diagnostic Trouble Code (DTC) Present Symptom Chart Index contains the list of symptoms addressed in this article, and sends the technician to the appropriate chart in the NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHARTS . If no PCM or SOBDMC DTCs are present and the vehicle symptom is not listed in the No Diagnostic Trouble Code (DTC) Present Symptom Chart Index, the technician should go to the appropriate Service Information article to continue diagnosis.