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
& Component Testing >> Computerized Engine Controls >> MOTRONIC Engine Control Module >> Ground Circuits Ground Circuits NOTE: Information is not available from manufacturer for a step-by-step ground circuit test at Engine Control Module (ECM). For additional information. Also, see ECM GROUND & VOLTAGE CHECK in SELF-DIAGNOSTICS article. Using DVOM, switched to resistance range. Check ground connections for continuity at ECM terminals No. 10, 14, 19, and 24 (1.0 ohm maximum). See WIRING DIAGRAMS.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.