P1635 Diagnostic Trouble Code Discussion for September 2013
5-Volt Reference 'A' Circuit Malfunction
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| Help Request | Posted | |
| 2003 Volkswagen Passat W8 4.0L communication issue VIN: WVWUK63B13 P1635: data bus power train missing message from a/c control. We are looking for the next plan of attack. Here is some background info: has an aftermarket radio, we unplugged the radio harness from the factory connector, no change, no communication to ECM. We went to the obdII diagnostic connector and tested pin #4 for g... |
September 16, 2013 |
