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View Full Version : Charge System Fault on a C5 with RR


Highlander
April 5th, 2012, 01:26 PM
Do i have to send it back?

Car charges normally, but gives this error. Any way to fix?
N0DIH
April 6th, 2012, 01:29 AM
Got more details on the error? Never heard of that. does the pcm have issues?
Highlander
April 6th, 2012, 04:47 AM
Brand new from moates...

I believe it gives p0638
GMPX
April 6th, 2012, 10:34 AM
Is this a 512K or 1Mb PCM?
There is several different service numbers for the 1Mb PCM, I know some of the truck ones don't work right in CTS-V's and Holden's as they are missing an output driver on the PCB.
Highlander
September 14th, 2012, 03:31 PM
I figured this out. Since i was doing a 2004->2002 conversion i needed to change pin 75 to pin 52 or something like that. Generator Field Duty Cycle.
joecar
September 16th, 2012, 03:24 PM
Highlander, thanks for posting a resolution :cheers:
Highlander
September 16th, 2012, 03:25 PM
Yeah... i always forget to post what I find.

alldata and mitchell have the wrong pinouts.. the only way i got it sorted was through the dealer data!