Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Isuzu Trooper. 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. Check for loose wire harness, cracked harness connector, poor, loose or corroded wire terminal condition, fuel tank condition and fuel level sensor condition. If problem is found, repair as necessary. After repair is complete, see VERIFYING VEHICLE REPAIR under SELF-DIAGNOSTIC SYSTEM. If no problem is found, go to next step.
- Turn ignition off. Remove fuel level sensor from fuel tank. See REMOVAL, OVERHAUL & INSTALLATION article. Ensure sensor arm moves freely. Check wiring for an intermittent open circuit. If problem is found, go to next step. If no problem is found, go to step 5.
- Replace fuel level sensor. See REMOVAL, OVERHAUL & INSTALLATION article. After repair is complete, see VERIFYING VEHICLE REPAIR under SELF-DIAGNOSTIC SYSTEM.
- Replace and reprogram PCM. See POWERTRAIN CONTROL MODULE REPLACEMENT under POWERTRAIN CONTROL MODULE. Use scan tool to clear DTC and verify repair.