28-tcs C1255 C...
Thread Starter
Racer
Joined: Apr 2003
Posts: 294
Likes: 0
From: Vancouver BC
28-tcs C1255 C...
Problem...
http://forums.corvetteforum.com/show....php?t=1031483
After a bit of searching...
28-TCS C1255 C. Current code
described as EBTCM Malfunction.
"Action Taken When DTC Sets
ABS/TCS/Active Handling (if equiped with RPO JL4) are disabled
Indicators that turn on:
- ABS Indicator
- Car Icon (TCS indicator)
Messages Displayed on the DIC:
- Service ABS
- Service Traction System
- Service Active HNDLG (if equipped with Active Handling RPO JL4)
Can anyone tell me where the EBTCM is? I did battery change yesterday and am wondering if maybe a connection came loose to cause the "service" msgs. Thanks.
http://forums.corvetteforum.com/show....php?t=1031483
After a bit of searching...
28-TCS C1255 C. Current code
described as EBTCM Malfunction.
"Action Taken When DTC Sets
ABS/TCS/Active Handling (if equiped with RPO JL4) are disabled
Indicators that turn on:
- ABS Indicator
- Car Icon (TCS indicator)
Messages Displayed on the DIC:
- Service ABS
- Service Traction System
- Service Active HNDLG (if equipped with Active Handling RPO JL4)
Can anyone tell me where the EBTCM is? I did battery change yesterday and am wondering if maybe a connection came loose to cause the "service" msgs. Thanks.
Last edited by SMX; Mar 6, 2005 at 12:36 PM.
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I don't know how you could have knocked anything loose by changing the battery..they did not go away when you hit reset??
Thread Starter
Racer
Joined: Apr 2003
Posts: 294
Likes: 0
From: Vancouver BC
The rest of the codes were all "H" history codes. This one won't clear when I try to reset it. I don't know where it is so I am not sure about the connections. The old AC Delco was shot. Maybe it could have shorted and caused something to malfunction? If it's a simple fix I would like to find it. Avoid the dealers $.
Racer
Joined: Nov 2004
Posts: 496
Likes: 0
From: HIRAM GA.
Originally Posted by SMX
Problem...
http://forums.corvetteforum.com/show....php?t=1031483
After a bit of searching...
28-TCS C1255 C. Current code
described as EBTCM Malfunction.
"Action Taken When DTC Sets
ABS/TCS/Active Handling (if equiped with RPO JL4) are disabled
Indicators that turn on:
- ABS Indicator
- Car Icon (TCS indicator)
Messages Displayed on the DIC:
- Service ABS
- Service Traction System
- Service Active HNDLG (if equipped with Active Handling RPO JL4)
Can anyone tell me where the EBTCM is? I did battery change yesterday and am wondering if maybe a connection came loose to cause the "service" msgs. Thanks.
http://forums.corvetteforum.com/show....php?t=1031483
After a bit of searching...
28-TCS C1255 C. Current code
described as EBTCM Malfunction.
"Action Taken When DTC Sets
ABS/TCS/Active Handling (if equiped with RPO JL4) are disabled
Indicators that turn on:
- ABS Indicator
- Car Icon (TCS indicator)
Messages Displayed on the DIC:
- Service ABS
- Service Traction System
- Service Active HNDLG (if equipped with Active Handling RPO JL4)
Can anyone tell me where the EBTCM is? I did battery change yesterday and am wondering if maybe a connection came loose to cause the "service" msgs. Thanks.
Thread Starter
Racer
Joined: Apr 2003
Posts: 294
Likes: 0
From: Vancouver BC
Update...
Disconnected the battery again but the problem never went away. The traction control and abs systems are not working. Found that out from driving the car. Could this be a real fault? Could the battery have shorted and ruined something? I think it needs a trip to the dealer now 
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 see that you have a 97. Your EBTCM (Electronic Brake Traction Module) is located just aft of the differential. You cant miss it. It is the device that has all of the brake lines connected to it. 1999 -2004 modles have a front mounted EBTCM
The Rear Mounted EBTCM gets lots of abuse from road salt and grime. There are three parts to the module. The electronic package, the hydraulic module body and the motor. The motor is the round part of the module. On the motor there is a ground lug. The lug has a wire that is connected to the frame. Most of the time the ground lug gets corroded and causes issues with the EBTCM. Be careful with this lug. If it spins inside the motor housing when you service it it will damage the motor.
The ground for that circuit is connected to chassis ground G-401. It is locates on the rear drivers side frame rail behind the rear tire. You need to remove the nut and clean the frame, ground lug and the nut. Use lots of WD-40 cause the nut will be rusted.
Before you remove and clean the grounds, use an OHM Meter and read between the body of the EBTCM and a good clean area on the chassie. You should see "ZERO" ohms. Let me know what you read.
Bill Curlee
The Rear Mounted EBTCM gets lots of abuse from road salt and grime. There are three parts to the module. The electronic package, the hydraulic module body and the motor. The motor is the round part of the module. On the motor there is a ground lug. The lug has a wire that is connected to the frame. Most of the time the ground lug gets corroded and causes issues with the EBTCM. Be careful with this lug. If it spins inside the motor housing when you service it it will damage the motor.
The ground for that circuit is connected to chassis ground G-401. It is locates on the rear drivers side frame rail behind the rear tire. You need to remove the nut and clean the frame, ground lug and the nut. Use lots of WD-40 cause the nut will be rusted.
Before you remove and clean the grounds, use an OHM Meter and read between the body of the EBTCM and a good clean area on the chassie. You should see "ZERO" ohms. Let me know what you read.
Bill Curlee
Thread Starter
Racer
Joined: Apr 2003
Posts: 294
Likes: 0
From: Vancouver BC
Originally Posted by Bill Curlee
I see that you have a 97. Your EBTCM (Electronic Brake Traction Module) is located just aft of the differential. You cant miss it. It is the device that has all of the brake lines connected to it. 1999 -2004 modles have a front mounted EBTCM
The Rear Mounted EBTCM gets lots of abuse from road salt and grime. There are three parts to the module. The electronic package, the hydraulic module body and the motor. The motor is the round part of the module. On the motor there is a ground lug. The lug has a wire that is connected to the frame. Most of the time the ground lug gets corroded and causes issues with the EBTCM. Be careful with this lug. If it spins inside the motor housing when you service it it will damage the motor.
The ground for that circuit is connected to chassis ground G-401. It is locates on the rear drivers side frame rail behind the rear tire. You need to remove the nut and clean the frame, ground lug and the nut. Use lots of WD-40 cause the nut will be rusted.
Before you remove and clean the grounds, use an OHM Meter and read between the body of the EBTCM and a good clean area on the chassie. You should see "ZERO" ohms. Let me know what you read.
Bill Curlee
The Rear Mounted EBTCM gets lots of abuse from road salt and grime. There are three parts to the module. The electronic package, the hydraulic module body and the motor. The motor is the round part of the module. On the motor there is a ground lug. The lug has a wire that is connected to the frame. Most of the time the ground lug gets corroded and causes issues with the EBTCM. Be careful with this lug. If it spins inside the motor housing when you service it it will damage the motor.
The ground for that circuit is connected to chassis ground G-401. It is locates on the rear drivers side frame rail behind the rear tire. You need to remove the nut and clean the frame, ground lug and the nut. Use lots of WD-40 cause the nut will be rusted.
Before you remove and clean the grounds, use an OHM Meter and read between the body of the EBTCM and a good clean area on the chassie. You should see "ZERO" ohms. Let me know what you read.
Bill Curlee
So...
Grounds are good. I took it to the mechanic. He checked it out and told me I need a new module and that this one has an internal malfunction. The price is pretty high... like $1600cdn... ($1200US) for the part. Can I buy this cheaper anywhere else? No warranty
Last edited by SMX; Mar 22, 2005 at 05:49 PM.
