No-Start condition
Thread Starter
8th Gear
Joined: Aug 2011
Posts: 8
Likes: 0
No-Start condition
'99 C5 conv 6-speed. Having gone through all of the recommendations I have found previously posted, I have checked two grounds out on front frame rails, two under the battery, one inside the right front kick panel, one under right door sill, and one behind the passenger seatbelt. Cleaned all with CRC cleaner and coated wtih NOALAX. Erased all codes and new codes that were set indicate the following:
PCM - P1626C
40 BCM - No Comm
58SDM U1000C; U1064C; 1040H
60IPC - U1160C; U1176C
Radio - U1064C
HVAC - U1064C; U1160C; BO367H
Checked all fuses in both boxes. Also removed battery - load tested okay. Removed starter - bench tested ok - 75 amp draw. Removed ignition switch - sanded and rebuilt. Checked ohms - all ok. Car will start if caught in gear. Jumped ignition relay - car will turn over and start. What next? Thanks.
PCM - P1626C
40 BCM - No Comm
58SDM U1000C; U1064C; 1040H
60IPC - U1160C; U1176C
Radio - U1064C
HVAC - U1064C; U1160C; BO367H
Checked all fuses in both boxes. Also removed battery - load tested okay. Removed starter - bench tested ok - 75 amp draw. Removed ignition switch - sanded and rebuilt. Checked ohms - all ok. Car will start if caught in gear. Jumped ignition relay - car will turn over and start. What next? Thanks.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
The BCM no comm will be the cause of it not starting and that is what caused the P1626:
P1626 Theft Deterrent System Fuel Enable Circuit
Get to the BCM and look for water damage on or inside of it. If you go to remove it, make sure you disconnect the battery first.
P1626 Theft Deterrent System Fuel Enable Circuit
Get to the BCM and look for water damage on or inside of it. If you go to remove it, make sure you disconnect the battery first.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Clear the codes and see if they come right back. Not once have I heard of a BCM being painted black and there's no reason for anyone to do it as its not visible to anyone. Next to the BCM is a serial data buss connector which is sometimes called a "star" connector. Its more like a flat bridge connector with a shorting strp across it and wrapped in tape. Make sure the shorting bar is fully seated.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
It sounds like the BCM is having bad problems. You might disconnect the battery, pull out the BCM and open it up. Look for water intrusion into the BCM. I would strongly suggest a wrist grounding strap be worn while doing this, properly grounded of course. Use ISO Alcohol and Q-tips to remove any contamination that you might find.
Thread Starter
8th Gear
Joined: Aug 2011
Posts: 8
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checked bcm no apparent problems,went 1step further took a test lite to tdc relay by bcm, red had batt. power yellow had ignition in start position then took light and backprobed yellow /black wire and car started no fuel signal so it stalled but would turn over with the key. would this mean it is the bcm or is there more to test,....? as always thanks for the help. bill
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Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
The TDR only controls the starter motor, but not the fuel pump. I suggest you PM either Bill Curlee or Lucky131969 and ask for their help. They have the schematics on this and can pinpoint the problem area. Again, the no comm on the BCM is the problem. Yes, it could be a bad BCM but it doesn't happen often.
Thread Starter
8th Gear
Joined: Aug 2011
Posts: 8
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Ok just put everything back. No change. used jumper to start car. Sits, idles, radio started working. Can not retrain key fobs. Car stalls when you let clutch out. Eraced codes, these reset with car idling: pcm - p1626u; bcm - no comm; 58sdm - u1064hc; ipc - u1160h, u1064hc, u1176h; radio - u1064hc; hvac - u1064hc, u1160h; ao-ldcm - u1064h; a1-rdcm - u1064h; a6-scm - u1064hc; bo-rfa - u1064hc. Traction control will not turn on and off, and rear hatches will not open.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
I wish I had schematics to it for you but I don't. You need to verify power to the BCM and a ground path. The serial data buss star connectors are next to the BCM so they should be still taped up with their shorting bars in place. You really need lucky or Bill C's help here or take it to a dealer to test the BCM
Thread Starter
8th Gear
Joined: Aug 2011
Posts: 8
Likes: 0
thanks for all the help guys g grant and lucky !!!!!!!!!!! found another tread with same problems exactly and same codes also.... uboth helped, thanks to bill curlee for his grounding problem sticky excellant forum and people helping out.. special thanks to contempory corvette in bristal pa. one day service and bcm arrived . great prices on used corvette parts!!!!! 18003678388 or2157888605 car started up first time!!!!! THANKS EVERYONE !!!!
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Do yourself a favor and open up the bad BCM anyway and look for water intrusion. If water is getting in there, then your HVAC udder is plugged up and more water will get into the new one and you'll be doing this all over again. Still a mystery to me why your original was painted black...
