ABS module as line lock
Thread Starter
TECH Junkie
Joined: Dec 2012
Posts: 3,615
Likes: 1,327
From: Iowa
ABS module as line lock Has anyone been clever and used the ABS module as a line lock solenoid?
I'd even be ok to use it to lock all 4 corners on command.
Thinking this could be useful in a footbrake type class where you're not allowed to use a transbrake. this would let you hold all 4 tight while activating say a 2 step. Then, just drop your button to kill the brakes and 2 step together and away you go.
I suppose you could always just use 2 line lock solenoids, but I was wondering if it's even possible with the factory abs module?
I'd even be ok to use it to lock all 4 corners on command.
Thinking this could be useful in a footbrake type class where you're not allowed to use a transbrake. this would let you hold all 4 tight while activating say a 2 step. Then, just drop your button to kill the brakes and 2 step together and away you go.
I suppose you could always just use 2 line lock solenoids, but I was wondering if it's even possible with the factory abs module?
Thread Starter
TECH Junkie
Joined: Dec 2012
Posts: 3,615
Likes: 1,327
From: Iowa
Does anyone have ABS module wiring diagrams? I'd like to know if the module can be forced on/off by just grounding a certain pin, or by giving it a 12v source.
For example, I know that in the transmission, the solenoids always are provided with a 12v source and the pcm will ground each one to activate as needed. So, if you want to check say 3rd gear, you can provide the appropriate solenoids with a ground to force them to do what you need. If the same thing could be done with the ABS module, I would think that you could set up a switch and momentary button.
If it hasn't been done before, i'd love to get some diagrams and guinea pig this project.
For example, I know that in the transmission, the solenoids always are provided with a 12v source and the pcm will ground each one to activate as needed. So, if you want to check say 3rd gear, you can provide the appropriate solenoids with a ground to force them to do what you need. If the same thing could be done with the ABS module, I would think that you could set up a switch and momentary button.
If it hasn't been done before, i'd love to get some diagrams and guinea pig this project.
12 Second Club
iTrader: (10)
Joined: Sep 2005
Posts: 948
Likes: 0
From: From Ohio now in that state up north
I have wanted this in a controller editor like hp tuners for a while but I don't think it's worth the effort for them to do an abs module. It's possible as newer cars have the feature from the factory I believe allowing you to do it with the abs module. I would like to see if it's possible from a switch seems like they might have a fail safe to prevent a grounded wire from locking the brakes completely.
You can't just splice into the harness and "force" one of the solenoids. All the solenoid coils are internal and controlled by the EBCM logic. Unless you've got a Tech 2 lying around (if it can even do that), it's much cheaper to just put a line lock kit in.
Thread Starter
TECH Junkie
Joined: Dec 2012
Posts: 3,615
Likes: 1,327
From: Iowa
I understand there is a module with logic that determines when the solenoids are activated, but what's the actual mechanism for activating them? A solenoid is a solenoid is a solenoid right? They all get grounded (or supplied with power) to become enabled. So, when the EBCM logic determines that it's the appropriate time to activate a solenoid, how does it do so? It has to just ground it right? If need be, the body can come apart to look at the solenoids, and the board, but i'd rather see a schematic before I tear apart my module.
"You can take a good look at a T-bone by sticking your head up a bull's ***, but wouldn't you rather take the butcher's word for it?"
-Tommy Boy
"You can take a good look at a T-bone by sticking your head up a bull's ***, but wouldn't you rather take the butcher's word for it?"
-Tommy Boy
