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.
1994 Audi S4FACTORY OEM SERVICE PROCEDURE
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 .
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.