Reply to thread

Message: <blockquote data-quote="Will_K" data-source="post: 21428" data-attributes="member: 7902">Further update. The engine control module and either the rear axle module (on AWD vehicles) or a diagnostic link resister (on FWD vehicles) provide 120 ohms resistance each at either end of the CAN network, and at the diagnostic test connector you should get 60 ohms as a result of the two resistors in parallel. I haven't actually located the diagnostic link resistor, but measurements point to it as a problem which may be causing my no communication problem with the scanners. The DTC reads open with the PCM disconnected and 120 ohms with the PCM connected, and the PCM reads 120 ohms.I'm still going to have another problem to diagnose after I fix the resistor based on the fact I had a problem before.For reasons I can't explain, I'm getting an instrument panel error code now stating that the hood is open - this wasn't present before. I don't have a hood latch sensor present, and it looks as though a mercury switch was added near the hinge as part of the aftermarket alarm.I made a quick run to the junk yard at lunch thinking I could easily find and grab a data link resistor off the rear suspension module... only to find that I couldn't find it? The description on the wiring diagram states it's near the X400 connector. I think I was looking for it on the axle side of it and not the other side, but the harness looks like it disappears behind the fuel tank or something.It could also be a broken connection somewhere between the DLR and the BCM - or for that matter it could be a connection broken somewhere else between the DLC. But If I could grab that resistor quick I'd rather have it on hand for this evening's diagnostic efforts.</blockquote>

Verification