Diagnostic Formats

Diagnostic Trouble Codes (DTC) are retrieved using QUICK TEST. Three types of DTCs are stored: Key On Engine Off (KOEO), Key On Engine Running (KOER) and continuous memory codes. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. During QUICK TEST, PCM performs 3 self-tests to retrieve DTCs. See RETRIEVING DTCS  . DTCs may be cleared from PCM memory after they have been recorded or repaired. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM.