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.
Check Engine Control Module (ECM)
| Step | Check | Yes | No |
|---|---|---|---|
1 CHECK ECM SIGNAL.
|
Is the voltage 0 ↔ 14 V or more? | Go to step 2. | Inspect the ECM.
|
2 CHECK HARNESS BETWEEN COMBINATION METER AND ECM.
|
Is the resistance less than 10 Ω? | Replace the meter case assembly. | Repair or replace the harness. |
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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