Quote:
Originally Posted by TimFreeh
The 'fault in communication with the ECU' error code isn't the same thing as the first error code saying the ECU couldn't communicate with the Glow Plug controller.
The 'fault in communication with the ECU' error is telling you your scan tool can't seem to interface/find the N3/9 main CDI control unit.
Was the ignition on when you scanned for codes? If not the scan-tool won't find the N3/9 module because it isn't powered up.
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Yes the key was on, as I was able to clear codes in other modules. I was also able to see six faults in the CDI module, I just was not able to clear the codes. Four were stored, the other two were the glow plug controller (currant and stored). I know they are two different faults, but I can only assume they are caused by the same thing, as they both showed up after I changed the alternator. Could there be a fuse that is blown? Since the scan tool worked to clear codes in other modules, I assume at least the diagnostic circuit/fuse is good.