Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 88 (ENGINE CONTROLS SELF-DIAGNOSTICS - 2.2L)SYSTEM TESTSMIL INOPERATIVEDIAGNOSTIC PROCEDURES
2004 Oldsmobile Bravada RWD
Diagnostic Procedures
2004 Oldsmobile Bravada RWDSECTION Diagnostic Procedures
WARNING: This page is about a different car, the 2002 GMC Sonoma and 2002 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
- Did you perform the Diagnostic System Check - Engine Controls? If yes, go to next step. If no, perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS under SELF-DIAGNOSTIC SYSTEM.
- Inspect fuse that supplies voltage to MIL. Is fuse open? If yes, go to step 10. If no, go to next step.
- Turn OFF ignition. Disconnect PCM. Turn ON ignition, with engine OFF. Connect a 3-amp fused jumper wire between MIL control circuit and a good ground. Observe MIL. Is MIL illuminated? If yes, go to step 9. If no, go to next step.
- Did fuse in the jumper wire open? If yes, go to step 11. If no, go to next step.
- Remove Instrument Panel Cluster (IPC). Test MIL control circuit for open between PCM and IPC. Repair as necessary. Did you find and correct the condition? If yes, go to step 14. If no, go to next step.
- Probe the MIL battery positive voltage circuit at IPC harness connector with a test light connected to a good ground. Does test light illuminate? If yes, go to step 8. If no, go to next step.
- Repair open in MIL battery positive voltage circuit. After repairs, go to step 14.
- Inspect for poor connections at IPC harness connector. Repair as necessary. Did you find and correct condition? If yes, go to step 14. If no, go to step 12.
- Inspect for poor connections at PCM harness connector. Repair as necessary. Did you find and correct the condition? If yes, go to step 14. If no, go to step 13.
- Repair short to ground in MIL battery positive voltage circuit. Replace fuse. After repairs, go to step 14.
- Repair short to voltage in MIL control circuit. After repairs, go to step 14.
- Replace the IPC. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. When complete, go to step 14.
- Replace PCM. Perform PCM relearn procedure. See POWERTRAIN CONTROL MODULE under PROGRAMMING. After replacing PCM, go to next step.
- Operate the system in order to verify the repair. Did you correct the condition? If yes, system is okay. If no, go to step 2.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.