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
Ignition Trigger Circuit (Simulation)
- Ignition trigger signal may be simulated for trouble shooting ignition. To do so, connect an oscilloscope to ignition coil high tension lead. With ignition off, disconnect DME control unit.
- Turn ignition on. Intermittently connect terminal No. 1 (White wire) to terminal No. 18 (Red wire) at DME control unit wiring harness connector. A high voltage spike must be displayed on oscilloscope each time terminals are jumpered.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.