Quick Test
NOTE:
Procedure given is for reading codes using an analog volt-ohmmeter. When using a scan tester, use tool manufacturer's instructions.
Turn ignition off. Set VOM at 0-15V DC range. Connect positive lead of VOM to positive battery terminal. Connect negative VOM lead to Self-Test Output (STO) terminal of Data Link Connector (DLC). See Fig 1 . Connect timing light, and go to KOEO SELF-TEST. Activate KOEO SELF-TEST by connecting jumper wire from Self-Test Input (STI) pigtail to Signal Return (SIG RTN) terminal of DLC with ignition on.