Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport and 2002 Isuzu Rodeo. However, it is still accessible from the selected car via links, so may be relevant.
- Perform ON-BOARD DIAGNOSTIC II SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM. After performing OBD-II system check, go to next step.
- Turn ignition off. Disconnect PCM 32-pin harness connector C-1 (Red). PCM is located under center console in front of shifter. Turn ignition on. If MIL illuminates, go to next step. If MIL does not illuminate, go to step 5 .
- Turn ignition off. Disconnect instrument panel cluster Green 30-pin harness connector. Check for short to ground in White/Green wire (MIL control circuit) between PCM harness connector and instrument panel cluster. See WIRING DIAGRAMS article. If problem is found, repair as necessary. After repair, repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM. If no problem is found, go to next step.
- Replace instrument panel cluster. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. Repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Turn ignition off. Reconnect PCM harness connectors. Turn ignition on. Reprogram EEPROM. See EEPROM PROGRAMMING PROCEDURE under POWERTRAIN CONTROL MODULE. Using scan tool, from MISCELLANEOUS TESTS, select LAMPS TEST . Using scan tool, command MIL Off. If MIL did turn off, repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM. If MIL did not turn off, go to next step.
- Replace and reprogram PCM. See POWERTRAIN CONTROL MODULE REPLACEMENT under POWERTRAIN CONTROL MODULE. After repair, repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.