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Home >> Porsche >> 1989 >> 911 Turbo, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests >> Introduction >> Control Unit (Cu) >> Ground Circuits

Ground Circuits

Using an ohmmeter, and wiring diagragm check for continuity to ground on CU ground circuit terminals. Resistance should be zero ohms. If not, repair open to ground. Check DME ground wires on cylinder No. 1 intake pipe and fuel filter mount. Check ground strap between body and transmission/engine. Ensure all electrical connections are free of corrosion and securely attached.