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.
1983 Porsche 944 AutomaticFACTORY OEM SERVICE PROCEDURE
Speed Sensor Check
NOTE:
This is an alternate test when an oscilloscope is not available.
- Secure a Fresnel lens front LED from an electronics store or use Part No. 171 919 061B . Connect a 220-ohm-1/4 watt resistor in series with one of the LED terminals.
- Connect positive LED test lead to terminal 8 of control unit harness connector. Connect negative LED test lead to terminal 27 of same connector. Do not start engine, but operate starter. L.E.D. will flicker dimly if speed sensor is sending a signal.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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