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.
Checking of grounding points
The difference in potential between the main ground on pin 14 and the sensor ground on pin 30 should be less than about 0.1 V.
A voltmeter can be used to check the control module's main ground by measuring the voltage across pin 14 and the negative battery terminal. A reading of less than about 0.1 V should be obtained.
Other grounding points can be checked in the same manner, but the voltage should be measured across pin 14 and pins 2, 24, 10 and 19. A reading of less than about 0.1 V should be obtained here also.
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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.