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Electrical engineers step inside 200

posted by  7 volvofamily on  Wed Jun 3 13:18 CST 2009
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last visit: Fri Jun 21 17:22 CST 2013
[RELATED]

Have you checked the connections and pins on the ECU? I've found that if the car has sat for a while then the connections will corrode and cause resistance issues with the ECU. If the pins and connections are determined to be clean and good then I would try to swap a known good ECU to try out. I don't know of any diagnostic you could try to verify if the current ECU is defective. The only test I know of is for the faulty FI relay ground with a bypass wire.






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