ECBM swap
Thread Starter
Instructor
Joined: Feb 2017
Posts: 180
Likes: 18
From: Indiana
ECBM swap
Has anyone changed just the electronic part of the ECBM? I would rather not have to bleed the brakes. Swapping that little box looks a lot easier than swapping that solenoid pack.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
Yes, and most of the time is the problem is not corroded valves in the body, (not getting code for slow or stuck vavle), its a corrosion problem on the connector pins, or cold solder joint problem on the control board.
So step one is top the connector to douche it and the controller board pins with electircal spray contact cleaner, in case the problem is just corrosion alone.
If that does not solve the problem and the board pins are good, the connector female spades and wires to them are fine, then it time to pull the control board. If if re-solder on the board is not your cup of tea, then send out the controller to have it repaired, verse getting a used controller that may have the some problems.
And yes, better to just replace the board if pump body and valves are fine, since GM went a bit over board on the connector line fittings when tightening them, and guys will either break the threaded connectors or strip out the threads when replacing the pump body as well.
So step one is top the connector to douche it and the controller board pins with electircal spray contact cleaner, in case the problem is just corrosion alone.
If that does not solve the problem and the board pins are good, the connector female spades and wires to them are fine, then it time to pull the control board. If if re-solder on the board is not your cup of tea, then send out the controller to have it repaired, verse getting a used controller that may have the some problems.
And yes, better to just replace the board if pump body and valves are fine, since GM went a bit over board on the connector line fittings when tightening them, and guys will either break the threaded connectors or strip out the threads when replacing the pump body as well.
Thread Starter
Instructor
Joined: Feb 2017
Posts: 180
Likes: 18
From: Indiana
Thank you.
I am getting errors on the canbus that I figure has to come from the ECBM or ECM. The wiring all checks out and the resistance checks out, so it is that or the ECM. I already replaced the BCM after finding corrosion in it.
I am getting errors on the canbus that I figure has to come from the ECBM or ECM. The wiring all checks out and the resistance checks out, so it is that or the ECM. I already replaced the BCM after finding corrosion in it.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
DTC or history codes will tell you where the problem is coming from, and just need to see what U code(s) is being thrown.U code is a loss of communication.
If not an active code, then need a scanner that can pull down to body level, to see the history codes that were thrown and from what module.
Also to point out, U code is loss of communication to the module, when the module has a lot of sensors to it, and could be EBCM is fine, but problem is connector on other sensors down line of it, or one of these sensors going out instead.
If not an active code, then need a scanner that can pull down to body level, to see the history codes that were thrown and from what module.
Also to point out, U code is loss of communication to the module, when the module has a lot of sensors to it, and could be EBCM is fine, but problem is connector on other sensors down line of it, or one of these sensors going out instead.
Thread Starter
Instructor
Joined: Feb 2017
Posts: 180
Likes: 18
From: Indiana
DTC or history codes will tell you where the problem is coming from, and just need to see what U code(s) is being thrown.U code is a loss of communication.
If not an active code, then need a scanner that can pull down to body level, to see the history codes that were thrown and from what module.
Also to point out, U code is loss of communication to the module, when the module has a lot of sensors to it, and could be EBCM is fine, but problem is connector on other sensors down line of it, or one of these sensors going out instead.
If not an active code, then need a scanner that can pull down to body level, to see the history codes that were thrown and from what module.
Also to point out, U code is loss of communication to the module, when the module has a lot of sensors to it, and could be EBCM is fine, but problem is connector on other sensors down line of it, or one of these sensors going out instead.
U2105 in the BCM and
U0100 in the ECBM.
I have continuity in the wires between them and pins 6 & 14 show 60 ohms at the DLC.
I replaced the BCM because it had corrosion, harness at the ECM looks good, harness at the ECBM looks good as does the harness at the BCM.
Thread Starter
Instructor
Joined: Feb 2017
Posts: 180
Likes: 18
From: Indiana
