98 A4 1.8t B5 - Won't start, Can't pull codes, No communication
06-09-2012, 05:50 PM
#1
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98 A4 1.8t B5 - Won't start, Can't pull codes, No communication
As I'm driving today, my check engine suddenly light flashes at me and half a block later, I'm stranded in the middle of the road.
The car will crank but not start.
Checked for codes and I'm getting 'no communication'.
Checked ECM. Fuses look fine. Fuel pressure is fine.
Tried putting a matching and working ECM in to replace the one I have in now and that one is also reading 'no communication'.
Anything else I can try?????
The car will crank but not start.
Checked for codes and I'm getting 'no communication'.
Checked ECM. Fuses look fine. Fuel pressure is fine.
Tried putting a matching and working ECM in to replace the one I have in now and that one is also reading 'no communication'.
Anything else I can try?????
06-09-2012, 06:55 PM
#3
Sounds like you have some other module that is bad and is flooding the k-line so the ECU can't communicate. Is your brake warning light on? Factory radio or aftermarket? Any other warning lights?
Since you know the ECU isn't the problem then you need to start disconnecting other problem area modules until communication is back.
Since you know the ECU isn't the problem then you need to start disconnecting other problem area modules until communication is back.
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