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.
1985 Porsche 944 AutomaticFACTORY OEM SERVICE PROCEDURE
Cu Power Supply
- Disconnect CU connector. Connect positive voltmeter lead to terminal 35 of CU harness connector. Connect negative test lead to terminal 5 of CU harness connector. Turn ignition switch to "RUN" position. Voltmeter should read battery voltage.
- Connect voltmeter positive test lead to terminal 18 of CU harness connector. Connect negative test lead to terminal 5 of CU harness connector. Turn ignition on. Voltmeter should read battery voltage.
- If no voltage is available, remove DME power relay. Using a jumper wire, connect terminals 30 and 87. Repeat voltage checks in step 1) and 2). On 944, connect voltmeter between terminals 3 of 9-pin connector and ground. If no voltage, check battery and related circuits.
Factory Service Tools
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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.