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.
Ground Circuits
Turn ignition off. Connect breakout box, leaving PCM disconnected. Measure resistance between each specified breakout box pin and ground. See PCM GROUND CIRCUIT RESISTANCE table. Repair indicated PCM ground circuit if resistance is greater than 5 ohms.
| PCM Pin | Breakout Box Pin No. | Wire Color | ||
|---|---|---|---|---|
| C1-10 (1) | 18 | Black | ||
| C1-20 | 17 | Black | ||
| C3-1 | 25 | Black/Light Green | ||
| C3-2 | 52 | Black/Orange | ||
| C3-15 | 54 | Black/Orange | ||
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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.