C5 ecm ( pcm )
Thread Starter
5th Gear
Joined: Dec 2011
Posts: 5
Likes: 0
C5 ecm ( pcm )
Can someone help to let me know if it is the ecm unit.. Driving yesterday and all of a sudden the guages went all over to max and stayed there, the information center stated to power down immediately and traction control was bad and anti lock system was failing.. I lost no power and engine runs fine.. Any suggestions, unfortunately I am out of town 500 miles.. Can I make it home or can I do something like change th emc??? Thanks
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Try opening both doors one at a time and give a shake to the door accordian tubes there. If the problem goes away or shows changes, then the issue is the serial data buss wire in the connector there. It will become lose over time and causes all sorts of weird issues. Also, jiggle the ignition key itself...if you have a bunch of stuff hanging off the key, remove the extra.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
I'll toss in one more real possibility, is the passenger floorboard "wet" with water? If the HVAC udders are plugged up, water will drip onto and into the BCM which is behind the passenger footwell which is a serious issue.
Please give us the information on your car...year, model, mods...
Please give us the information on your car...year, model, mods...
Thread Starter
5th Gear
Joined: Dec 2011
Posts: 5
Likes: 0
I'll toss in one more real possibility, is the passenger floorboard "wet" with water? If the HVAC udders are plugged up, water will drip onto and into the BCM which is behind the passenger footwell which is a serious issue.
Please give us the information on your car...year, model, mods...
Please give us the information on your car...year, model, mods...
leaned all the grounds and I've tried disconnecting the battery and re booting the system.. No luck.. Some items work some don't.. auto headlights , NO Radio, NO Interior courtesy lights Yes.. Some of the BCM system seems to work and the other stuff does not.. From reading I don't believe it's the PCM but could be the BCM.. Need help.. Can I make the trip back 500 miles if the engine seems to be runing fine?
Tech Contributor
Joined: Sep 2005
Posts: 1,731
Likes: 82
From: New Market AL
Where are you right now?
Check the door harness like dgrant suggested. Pull the accordian back and work the wiring harness out enough to access the connector(s). Look for any sign of wire insulation being abraded. There is a wire in that door harness that often has a very short exposed end at the connector that can ground out.
Check the door harness like dgrant suggested. Pull the accordian back and work the wiring harness out enough to access the connector(s). Look for any sign of wire insulation being abraded. There is a wire in that door harness that often has a very short exposed end at the connector that can ground out.
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Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Where are you right now?
Check the door harness like dgrant suggested. Pull the accordian back and work the wiring harness out enough to access the connector(s). Look for any sign of wire insulation being abraded. There is a wire in that door harness that often has a very short exposed end at the connector that can ground out.
Check the door harness like dgrant suggested. Pull the accordian back and work the wiring harness out enough to access the connector(s). Look for any sign of wire insulation being abraded. There is a wire in that door harness that often has a very short exposed end at the connector that can ground out.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
What was the exact code? If you got any of these I'll list, the PCM has serious issues and you'll need to see a dealer in all probability. Check all of the fuses. Look for battery acid on the PCM or its wiring and so on.
P0601 PCM Memory
P0602 PCM Not Programmed
P0604 PCM RAM Performance
P0606 PCM Internal Communication Interrupted
P0601 PCM Memory
P0602 PCM Not Programmed
P0604 PCM RAM Performance
P0606 PCM Internal Communication Interrupted
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I have the ISSUE WHIPPED!! Wait till you hear what it was!!! 
Were working on getting him in the BEST condition to get back home SAFELY and efficiently!!
Hes working on some FIXES now!
Bill
Were working on getting him in the BEST condition to get back home SAFELY and efficiently!!
Hes working on some FIXES now!
Bill
Thread Starter
5th Gear
Joined: Dec 2011
Posts: 5
Likes: 0
I want to thank everyone that helped me today, Bill Curlee had some magic and guideness and had me check a few items and found out that the floor in the vette was wet under the driver seat and the plug that works the seat was in water and shorten the system out. To Bill thanks and everyone else thank you..
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
BOB
When your back home,, We can figure out where the water came from...
Glad we were able to resolve the MAIN Issue and restore the rest of the BCM functions.
Get your BUTT home safely and give me a call.
Glad to be able to help! STAY SAFE!!
BILL
When your back home,, We can figure out where the water came from...
Glad we were able to resolve the MAIN Issue and restore the rest of the BCM functions.
Get your BUTT home safely and give me a call.
Glad to be able to help! STAY SAFE!!
BILL
