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Paul 996
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Everything posted by Paul 996
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Here's what the garage has said: Diagnostics does not pick up DME (ECU not responding) Check voltage at starter - 12V Crank key - No voltage at trigger on starter Checked wiring diagram - System has a starter lock and MFI relays Change relays - No difference Connected terminal 30 & 87 on starter lock relay - This allowed engine to crank, but not fire. This side of circuit ok. Thoughts currently - Either relay trigger circuit faulty or ECU Power to relays, but not trigger signals. Wiring seems ok. Check continuity of wires - All ok Check pin for trigger switch (Pin 54 of ECU = UB switched) - This controls Air mass, MFI and DI relay, Injection relay, Oxygen sensor, Secondary airpump relay, Fuel pump (through a connecting relay) This item is not switching - Controlled directly by ECU Check pin 26 (Referred to as terminal 30 on wiring diagram - feeds MFI and DI relay also) - Has the required 5V switching voltage In conclusion the ECU control from Pin 54 is causing the problem. This is the direct control for the majority of engine fuelling systems. Therefore an internal ECU fault. Still waiting to find out the results...
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Thanks guys, I will try your suggestions and let you know. Paul
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Hi Hi i have just joined this forum and have the same trouble as you with my 1999 996 carrera auto. I'm interested to find out if you sloved this problem and what you had to do? many thanks Paul