mackruss wrote:
Well i went to the dealer today and was told that my ECM was fried probably when i jump started it. To replace 735$ - these guys don't do anything else but replace parts. Strangely enough she runs fine, no limp mode but my ECM is fried, weird.
Any options for me, second hand or try and isolate the problem which i still believe to be a faulty output sensor on the gearbox as recorded by the scanner, can a scanner lie.
I see several ECU's for sale in the US for $150USD to $250 and above.
you should be able to check for continuity at the speedo sensor, as well as check for continuity between the sensor and the ecu.
I would have to double check, but poking at the wiring diagrams seemed to indicate that the speed sensor signal went into the BCM(body control module) and from there was either broadcast on the Bus or had a different dedicated line to the ECU(though some of this could be me confusing 2002 with 2005CRD stuff).
In the FSM pdf you can pullup the pinout for the speedo sensor, it will say the circuit number to the left of the pin function, for example a sensor ground might be K4, if you then search the pdf for K4 you can see everywhere that that circuit runs.
Makes tracking down circuit a lot easier, you can trace them through connections, splices, etc.
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