Hey All, I have had the dreaded EBCM failure. I know the standard procedure is to cough up the $158 and send it to absfixer.com but I'd rather repair it myself if possible. I hear that its often just a small relay in there that breaks, so if I can somehow get the cover off I'll be able to see whats going on inside. However, the cover is glued on with RTV very well, and no matter how much I pry it will not budge. Has anyone ever had the cover off theirs, and how did it get off. Doesnt make sense for all of us to be paying all this money when we might be able to figure it out on our own. -Quin

 

What does EBCM stand for? I have never heard of this before.

:o

 

Electronic Brake Control Module

 

Got mine apart carefully with a razor blade and small screwdriver...now I need to find where to buy that relay inside!!!! Anyone know where to find it????

 

Can you provide any info on the relay or any pics? If so, I may be able to help.

 

I will take some pics of it tomorrow and post them...I know I have seen the relay somewhere before, I just cannot remember where or what it was in

 

Don't have an answer - but would you consider doing a DIY pictorial for all (including the removal of the unit and reinstall)?

With the number of these going 'south' this would be much appreciated, and should be made a part of the Tech Info forum post (IMO)

 

Dennis, here's a How To that was orginally posted by Twil1ght:


Courtesy Bill Curlee

As many of you have run into the EBCM failure (DIC code C1214 - Sol Valve relay Contact or coil CKT Open) and the infamous Service Traction Control/Service Active Handling/Service ABS - and let's not leave out the "shame you into the service center" lights that won't go off the dash, I thought I'd take a minute to say I just replaced my EBCM.

I got the part from gmpartsdirect.com for nearly half what the stealership wants for it. And as far as putting it in - you could grab 2 or 3 kids off the short bus and let all of them take turns following your instructions and the slowest one would take about 30 minutes. It's a complete joke. I did mine from the topside and wouldn't even have had to get under the car except that I dropped a bolt and had to pick it up off the ground.

Put the part in, turned key to on position, watched the lights go off after a month of looking at them, checked for codes, system has joy - Did a quick test with competitive driving, perfect results - time for a beer.

EDIT: The instructions I used:



Removal Procedure

1. Turn the ignition switch to the OFF position.
2. Disconnect the EBCM harness connector.
3. Remove the two insulator nuts.
4. Lift the EBCM/BPMV out of the bracket high enough to
allow clearance to remove the insulator mounting bolt and
the EBCM.
5. Remove the insulator mounting bolt from the EBCM.
6. Remove the four EBCM to BPMV bolts.
7. Separate the EBCM from the BPMV by gently pulling apart
until
separated.
8. Carefully remove the seal.
The seal may by reused if it is not cut or damaged.

Installation Procedure

1. Clean the BPMV seal surface with alcohol using a clean
rag.
2. Install the seal to the BPMV if it is not cut or damaged.
3. Install the EBCM to the BPMV.
4. Tighten the four mounting bolts in the following sequence:
- First pass to 27 inch Ibs.
- Second pass to 53 inch Ibs.

Important: If the insulator nut was removed it must be replaced with a new insulator nut.

5. Install the front EBCM insulator mounting bolt. Tighten
the bolt to 10 ft. Ibs.
6. Install the EBCM/BPMV into the bracket.
7. Install the two insulator nuts. Tighten the two insulator
nuts to 89 inch Ibs.
8. Connect the EBCM harness connector. Important: Both
sides of the EBCM harness connector must be engaged
with lever before closing.
9. Turn the ignition switch to the ON position; do NOT start
the engine.
10. Perform the Diagnostic System Check - ABS. (Don't let this scare you - this basically means let the car do what the car does, and show you that everything is OK with the system, and then investigate the DIC codes which should be cleared)

Alos this question may be relevant:

What type, and size driver did you use to remove the four screws holding the EBCM to the BPMV? Did you remove the hoses that cross the top of the EBCM? Did you replace the insulator nuts or use the original ones?

Answer:

On 2001 and up, its mounted up front on the frame near the steering rack. EBCM is Electronic Brake Control Module and is the computer half of the ABS/TC/AH assembly. BPMV (Brake Pressure Modulating Valve) is the mechanical part of the assembly. My C1214 required the BPMV to be replaced.

 

Correct term is EBTCM. (Electronic Brake Traction Control Module) The "T" gets commonly left out a lot in conversation. No biggie though.

Like Dave said, it's mounted to the BPMV.

 

Yes, dumb question on it's way... Is the upper radiator hose empty or do I have to drain the radiator before I take it off?

 

Should not have to alter the location of the hose. There is plenty of room. I just disconnected the airbridge for easier access.

 

What are the two "insulator nuts"? I'm in the process of removing the module from my '99 and there's some type of insulator or standoff at the bottom in the middle with a nut on it. It's design with a slot for removal, but looks like the entire unit has to come up before that piece clears and the module can be removed. Is that one of the insulators that should be replaced? Others too? Tnx

 

exactly what I did. Gives you enough room to get it on and off.

 

DG

Many thanks

 

How to remove the lower clip on the traction control module any help please

 

Hello any instructions on releasing the bottom clip I can’t seem to get it off I outdated appreciate any help thx

 

I went through this ordeal, last year. If I remember correctly, it just "pivots" up, and out of the way.