EBCM nightmare and brake locking issues
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 4
EBCM nightmare and brake locking issues
Guys, FML.
Few days ago my ABS and Active Handling service light came on so I checked and cleaned the 101 and 108 grounds and didn't fix the errors, then did the nightmarish EBCM removal, opened and resoldrered a few connections that seemed need to be resoldered, put the EBCM back on the car and reseted the errors, tried to move and the brakes are STUCK, OMFG, I disconnected the EBCM still same issue, even took it off fully still the same issue, took out ABS fuses and still stuck, can someone help? Can't think of anything else and can't find help online.
Few days ago my ABS and Active Handling service light came on so I checked and cleaned the 101 and 108 grounds and didn't fix the errors, then did the nightmarish EBCM removal, opened and resoldrered a few connections that seemed need to be resoldered, put the EBCM back on the car and reseted the errors, tried to move and the brakes are STUCK, OMFG, I disconnected the EBCM still same issue, even took it off fully still the same issue, took out ABS fuses and still stuck, can someone help? Can't think of anything else and can't find help online.
Last edited by Artako; Dec 17, 2023 at 08:05 PM. Reason: Typo
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 4
Melting Slicks
Joined: Dec 2004
Posts: 3,382
Likes: 250
I had a ecbm problem and still yet to test the fix on track to see if it works. Dash lite is at least good. Anyway, I just got my ebcm back from absfixer. he has the gear to test and fix the ebcm. The solder trick might work but I think there is more to it? For about 250 fixer added a electric surge thing to my ebcm and found 13 hard codes and a bad relay. I don't think that would have been solved just by refreshing solder joints. Anyway that's my data point. I think ABSFixer is good service and good value.
People say with no ebcm you got stock brakes just not abs like the 1970's. They say you can drive the car around but the pointy things in the abs are sticking out exposed. I have no idea if that is bad to get road dirt in there so I did not even start my car once I got the ebcm out it went right to fixer.
People say with no ebcm you got stock brakes just not abs like the 1970's. They say you can drive the car around but the pointy things in the abs are sticking out exposed. I have no idea if that is bad to get road dirt in there so I did not even start my car once I got the ebcm out it went right to fixer.
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
The POINTY THING on the Brale Pressure Modulator Valve "BPMV" are spool valves. Some are OPEN and Shut when they are actuated ENERGIZED by the electro magnet in the Electronic Brake Pressure Module (EBPM) The other ones are SHUT and open when commanded open.
I have to agree with JIM993. Sounds like one of the spool valves is stuck in a position that it should not be in. Locking pressure in the calipers.
YEP, Try venting the calipers and see if it frees up the wheels. If its not a brake pressure issue, it could be a Transmission issue. If it were me, I would put the transmission in N and jack a wheel in the front and back and see if you can rotate a wheel/s.
I have to agree with JIM993. Sounds like one of the spool valves is stuck in a position that it should not be in. Locking pressure in the calipers.
YEP, Try venting the calipers and see if it frees up the wheels. If its not a brake pressure issue, it could be a Transmission issue. If it were me, I would put the transmission in N and jack a wheel in the front and back and see if you can rotate a wheel/s.
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 4
The POINTY THING on the Brale Pressure Modulator Valve "BPMV" are spool valves. Some are OPEN and Shut when they are actuated ENERGIZED by the electro magnet in the Electronic Brake Pressure Module (EBPM) The other ones are SHUT and open when commanded open.
I have to agree with JIM993. Sounds like one of the spool valves is stuck in a position that it should not be in. Locking pressure in the calipers.
YEP, Try venting the calipers and see if it frees up the wheels. If its not a brake pressure issue, it could be a Transmission issue. If it were me, I would put the transmission in N and jack a wheel in the front and back and see if you can rotate a wheel/s.
I have to agree with JIM993. Sounds like one of the spool valves is stuck in a position that it should not be in. Locking pressure in the calipers.
YEP, Try venting the calipers and see if it frees up the wheels. If its not a brake pressure issue, it could be a Transmission issue. If it were me, I would put the transmission in N and jack a wheel in the front and back and see if you can rotate a wheel/s.
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
Just disconnect the big connector on the EBTCM, vent the calipers and see it it stays free when you turn the ignition on.. For the calipers to clamp, you either had to:
1 Depress the brake
2. The BPMV motor had to run to build pressure in the system. With the module disconnected, the motor cant run and the spool valves can not actuate.
If you depress the brake and release it, the front wheels SHOULD lock up when brake depressed and roll free when the pedal is released. If they remain locked up after release, there is a problem in the hydraulic system.
.
1 Depress the brake
2. The BPMV motor had to run to build pressure in the system. With the module disconnected, the motor cant run and the spool valves can not actuate.
If you depress the brake and release it, the front wheels SHOULD lock up when brake depressed and roll free when the pedal is released. If they remain locked up after release, there is a problem in the hydraulic system.
.
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Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 4
Melting Slicks
Joined: Dec 2004
Posts: 3,382
Likes: 250
I did not touch those things when I took my EBCM off. Somehow you dented the dome or bent one of the posts? ABSFixer has those parts for sale. They aren't cheap but I bet they work. I did not realize how screwed up my car was until fixer fixed my EBCM. My brakes actually work like brakes.
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 4
I did not touch those things when I took my EBCM off. Somehow you dented the dome or bent one of the posts? ABSFixer has those parts for sale. They aren't cheap but I bet they work. I did not realize how screwed up my car was until fixer fixed my EBCM. My brakes actually work like brakes.
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 4
Guys, FML.
Few days ago my ABS and Active Handling service light came on so I checked and cleaned the 101 and 108 grounds and didn't fix the errors, then did the nightmarish EBCM removal, opened and resoldrered a few connections that seemed need to be resoldered, put the EBCM back on the car and reseted the errors, tried to move and the brakes are STUCK, OMFG, I disconnected the EBCM still same issue, even took it off fully still the same issue, took out ABS fuses and still stuck, can someone help? Can't think of anything else and can't find help online.
Few days ago my ABS and Active Handling service light came on so I checked and cleaned the 101 and 108 grounds and didn't fix the errors, then did the nightmarish EBCM removal, opened and resoldrered a few connections that seemed need to be resoldered, put the EBCM back on the car and reseted the errors, tried to move and the brakes are STUCK, OMFG, I disconnected the EBCM still same issue, even took it off fully still the same issue, took out ABS fuses and still stuck, can someone help? Can't think of anything else and can't find help online.
Cruising
Joined: Jul 2014
Posts: 10
Likes: 1
Same problem C6 Front brakes locked up.
Guys, FML.
Few days ago my ABS and Active Handling service light came on so I checked and cleaned the 101 and 108 grounds and didn't fix the errors, then did the nightmarish EBCM removal, opened and resoldrered a few connections that seemed need to be resoldered, put the EBCM back on the car and reseted the errors, tried to move and the brakes are STUCK, OMFG, I disconnected the EBCM still same issue, even took it off fully still the same issue, took out ABS fuses and still stuck, can someone help? Can't think of anything else and can't find help online.
Few days ago my ABS and Active Handling service light came on so I checked and cleaned the 101 and 108 grounds and didn't fix the errors, then did the nightmarish EBCM removal, opened and resoldrered a few connections that seemed need to be resoldered, put the EBCM back on the car and reseted the errors, tried to move and the brakes are STUCK, OMFG, I disconnected the EBCM still same issue, even took it off fully still the same issue, took out ABS fuses and still stuck, can someone help? Can't think of anything else and can't find help online.
Cruising
Joined: Jul 2014
Posts: 10
Likes: 1
Same problem C6 Front brakes locked up.
Guys, FML.
Few days ago my ABS and Active Handling service light came on so I checked and cleaned the 101 and 108 grounds and didn't fix the errors, then did the nightmarish EBCM removal, opened and resoldrered a few connections that seemed need to be resoldered, put the EBCM back on the car and reseted the errors, tried to move and the brakes are STUCK, OMFG, I disconnected the EBCM still same issue, even took it off fully still the same issue, took out ABS fuses and still stuck, can someone help? Can't think of anything else and can't find help online.
Few days ago my ABS and Active Handling service light came on so I checked and cleaned the 101 and 108 grounds and didn't fix the errors, then did the nightmarish EBCM removal, opened and resoldrered a few connections that seemed need to be resoldered, put the EBCM back on the car and reseted the errors, tried to move and the brakes are STUCK, OMFG, I disconnected the EBCM still same issue, even took it off fully still the same issue, took out ABS fuses and still stuck, can someone help? Can't think of anything else and can't find help online.
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 4
My C6 front brakes completely locked up at a very busy intersection at rush hour. I finally reached under the right front fender and sliced the brake hose to release pressure on both front wheels. I have removed the ABS module but don’t see how to remove the electronic board. Every ABS has info for removing the C5 but none the C6. There is a bonded electrical connector housing. Do I simply cut that housing where it is bonded and somehow release the board. I have removed the screws that were exposed when I took the valve body off.
sure your issue is ABS not something else, pulled codes yet?
Cruising
Joined: Jul 2014
Posts: 10
Likes: 1
Yes and believe it or not no codes. I am beginning to think one or more of the solenoid valves got stuck or somehow failed..
I hate to send the electronic module out if it’s actually something wrong with the valve assembly.
I hate to send the electronic module out if it’s actually something wrong with the valve assembly.
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 4
if it's yur abs module yu can simply take out 2 fuses in your fuse bix to test and see. It will fix your problem right away, if it doesn't, it's not your abs module
Melting Slicks
Joined: Dec 2004
Posts: 3,382
Likes: 250
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 4