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 Porsche 911 Speedster, AutomaticFACTORY OEM SERVICE PROCEDURE
Diagnostic Circuit
- Locate 19-pin diagnostic connector underneath cover in front passenger footwell. Use Digital Volt-Ohmmeter (DVOM) to check wiring harness continuity between pin No. 7 (Orange/Blue wire) of 19-pin diagnostic connector and terminal No. 13 (Orange/Blue wire) of DME control unit.
- Use DVOM to check wiring harness continuity between pin No. 8 (Orange/White wire) of 19-pin diagnostic connector and terminal No. 55 (Orange/Blue wire) of DME control unit. If continuity does not exist, check wiring harness for open circuits.
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.