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.
Malfunction Indicator Light
| Switch | PCM Pin | BOB Pin | Wire Color |
|---|---|---|---|
| MIL | 1A | 51 | YEL/BLK |
1) Turn ignition off. Install BOB, leaving PCM disconnected. Turn ignition on. Ground BOB test pin. If MIL light comes on, MIL circuit is okay. If codes do not flash on MIL during QUICK TEST or MIL never comes on, temporarily substitute known good PCM and retest. If MIL light stays off, go to next step.
2) Turn ignition off. Remove instrument panel connector (8-pin connector). Remove and inspect bulb. If bulb is okay, go to next step. If necessary, replace bulb.
3) Turn ignition off. Inspect for shorts or grounds in MIL wire between instrument panel connector and BOB test pin. If any defects exist, repair wire. If wire is okay, replace the instrument panel printed circuit board.
Use the Manual With the Right Hardware
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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.
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