Bill C, I need your help! No comm issues.
08-03-2016, 04:39 PM
#1
Instructor
Thread Starter
Bill C, I need your help! No comm issues.
Yesterday my windows quit working driver and passenger side. I did some searches and tried pulling the wires out of the accordion in the door jambs. Now my windows work but I am getting a REP, my instrument cluster is acting up comma, and a ton of codes. It will start and doesn't seem to be in REP mode, but nonetheless something is not right. I have pulled the grey tabs off the plugs near the BCM and they look fine. I have unplugged all the wires going to the BCM and the plugs in the door jambs and they look fine. No sign of oxidation on the BCM. What next?
PCM No Comm
BCM U1255 H C
SDM U1000 H C
SDM U1016 H C
BO-RFA U1000 H C
Colby
PCM No Comm
BCM U1255 H C
SDM U1000 H C
SDM U1016 H C
BO-RFA U1000 H C
Colby
Last edited by Cleonard; 08-03-2016 at 04:40 PM.
08-03-2016, 05:02 PM
#2
Instructor
Thread Starter
I also visually checked all fuses but haven't yet tested for ground and voltage with a meter. Would the no comm to the PCM cause all the other codes?
Colby
Colby
Last edited by Cleonard; 08-03-2016 at 05:02 PM.
10-30-2016, 11:46 AM
#3
Racer
Any luck with this? I am having the same problem intermittently. I use the "shake the door wire harness" trick and it fixes it for a while...
11-09-2016, 02:20 AM
#4
Le Mans Master
Member Since: Aug 2005
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St. Jude Donor '13-'14-'15
Are you talking about No Communication to your ECM when you plug into your OBD2 port ?? If so this is a very common issue as GM hides the fuse to your OBD2 port on your car's cigarette lighter fuse------Make sure the cig ligther fuse is not blown----This is why it is recommended to never use any cig lighter adapters to charge any electronic devices as they can prevent the OBD2 port from having power and cause a no comm issue
