Apply parking brake, and place shift lever in Park (A/T) or Neutral (M/T). Block drive wheels. Turn off all electrical loads. Connect appropriate test equipment to vehicle as follows.
Analog Volt-Ohmmeter (VOM)
1) Turn ignition switch to OFF position. Set VOM at 0-15V DC range, and connect positive lead of VOM to positive battery terminal.
2) Connect negative VOM lead to Self-Test Output (STO) terminal of self-test connector. See Fig. 2 . 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 terminal of self-test connector with ignition on.
Follow manufacturer's instructions to hook up equipment and record service codes.
STAR Series Tester
Turn ignition to OFF position. Connect color-coded adapter cable leads to diagnostic tester. Connect 2 service connectors of adapter cable to vehicle self-test connector and STI pigtail connector. Connect timing light. Go to KOEO SELF-TEST.
"CHECK ENGINE" Or "SERVICE ENGINE SOON" Light (MIL)
With ignition on, connect a jumper wire between Self-Test Input (STI) pigtail and signal return terminal of self-test connector. No additional special equipment hookup is required.