Converted_Germ

I didn't know which section to post this in, so I posted it in both in anticipation of one being removed. Sorry if I broke a regulation.

So about a week ago I go through the DTC and find a bunch of codes. I clear them all seeing as I have never checked codes through the DTC. Today after doing a little work on the car, I go through the DTC again and walah. I have approximately 1,000,000 codes. In reading around on here and some other forums, I see most people appreciate it when the entire list of codes is given, as if they are all interconnected puzzle-pieces. So in true Corvette fashion, here is the list and I give you amigos many thanks in advance.


P.S. Im sorry. I'll owe you guys a cold one after this.

PCM:
P1626H

TCM:
U1301H
C1221H
C1293H

BCM:
U1255H
U1096H
U1061H

SDM:
U1301H

IPC:
U1255H
U1016H
U1064H
U1040H
U1088H
U1176H
U1160H

Radio:
U1016H
U1064H
U1096H

HVAC:
U1064H
U1096H
U1160HC
U1255H

A0-LDCM - No Comm.

A1-RDCM:
U1255H
U1064H
U1016H
U1096H

A6-SCM:
U1300H
U1255H
U1016H
U1064H

B0-RFA:
U1255H
U1064H
U1096H

Later on I jiggled the rubber wire loom going to the driver's side door and it got connection:

A0-LDCM:
U1064H

Symptoms:

-The ABS kicks in randomly upon varied amounts of brake input in combination with steering input.
-The car will randomly say "service active handling" "service ABS" "service traction control"
-The orange "security" light sometimes doesn't turn off upon startup
-I can be driving and the car will say "reduced engine power," all of my gauges will go to red, the radio will shut off, the car will bong at me, and the cluster will light up with warning lights
-Sometimes the electrical components of the drivers side door do not work at all. I read on here that jiggling the loom going into the door would solve the problem, and it does. I just open the door and move it around a bit to temporarily fix it.I guess it has something to do with a pinched wire inside of that loom?

**The other day I noticed a wet spot on the passengers side seat when getting in my car after a rain storm. Sure enough, I look up and the headliner around the a-pillar above the passenger seat is wet. I read it was something to do with the lack of sealant used from GM in between the windshield and the car at the corners. I don't really know how to approach this problem. I called Safelite and they said they do not have anyone in my area that can work on C5's because its risky to remove the reveal molding.


Again, Thanks everyone for taking a look.

martysauto

You have almost all communication codes. Bill will prolly chime in on this, but you may have already found your problem. The harness to the left door. Meanwhile I would clear all of them, drive the car and see what returns.
You did not mention symptoms? Dadaroo and 8vette7 are also very knowledgeable. Listen to them. I just read there is a 4 wire bus connector that you can unplug to disconnect the doors and seats from the communication system.

Converted_Germ

achievement unlocked!


I just added a little more to the bottom of the original post stating what I have been noticing with the car. Thank you martysauto.

dadaroo

Please follow what 8VETTE7 is saying. Even if it is dry now it could have been wet before. Clear your codes and see what comes back. Then we can get down to brass tacks (you can tell how old I am from that comment).

If/when we need to deal with Serial Bus issues we can walk you through that. Probably best to discuss on the phone. Anytime you have a question on anything you can PM me with your phone number.

With regard to the door issue, it could also be the connector (loose/bent pins) and not just a pinched wire. I will try to find my link on that for you.

Bill Curlee

100% GOOD ADVICE!

Converted_Germ

Thank you for the advise everyone. I am going to go out and start taking things apart while there is still some daylight. I will start with the BCM area as suggested and will post what I find.

Converted_Germ

Okay, so I went out and pulled (what I think is) the BCM. I checked all of the prongs in the BCM where the female style clips slide on to and they all seem nice and clean. The carped is dry to the touch, but when I peeled it back the padding underneath was damp. Looks like I get to pull the carpet out and wash/dry everything. Anyways, I did not see any sort of corrosion at all while I was down there. Here are some pictures:

Mind the messy wiring. I don't know what the wires tapped into the fuse panel go to, but two of the wires displayed go to my Escort. I use the body of the BCM as a ground.

apologies for the smashed thumb too...

Bill Curlee

If you have corrosion, it will be on the circuit board that is inside that silver box:

Converted_Germ

okay. I am going to go pull it and rip it open. Thanks!

Converted_Germ

Here are pictures of the BCM circuit board. I dont see any corrosion anywhere.

Converted_Germ

Also, I noticed it started doing this after I installed the BCM:

http://s573.photobucket.com/user/EIP...3yg1n.mp4.html

Converted_Germ

no codes today. They seem to come after a rain, which would mean that water is probably leaking down the A-pillar, through the dash, into the the kick panel and shorting out the BCM which throws all of the communication codes. The LDCM issue seems like it could either be a pinched wire within the loom, corroded/broken contacts within the clip, or a bad ground. I am going to pull the headliner and have a buddy pressure wash the car while I look for leaks. Hopefully I will be able to isolate the origin of the leaking roof and get this problem taken care of. I also think, as Bill Curlee stated in one of his many posts, my car could benefit from going over all of the chassis grounds with a wire brush.

Thanks everyone,
I will post the results from the ground/connector pin cleaning for future reference.