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.
1988 Porsche 924 AutomaticFACTORY OEM SERVICE PROCEDURE
Diagnosis & Testing: Notes
NOTE:
The DME system tests are limited. Complete testing of the DME system requires an oscilloscope, voltmeter, ohmmeter and special test leads to insert in multiple pin CU connector. On 944-S a self-diagnosis with fault memory is integrated into the DME control unit. Faults can be called from memory with a special diagnostic Tester (9268), which can be connected to diagnostic connector on DME control unit wiring harness.
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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