Reprogram necessary with different ABS module?
Reprogram necessary with different ABS module? I am planning on replacing my ABS module with one from a 02 firebird (I have a 98 z28). Both my car and the module that I bought were are non TCS. I am just curious if I will have to completely reprogram the ABS since maybe the gears in the cars are different, or if it will be a plug and play type deal.
thanks
thanks
So will I need to change the setting in the PCM? I didn't mess with the rear end, but I didn't know since the cars had different final drive ratios if that will prematurely set off the abs
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
ABS reads wheel sensors. It doesn't make a **** how many times the engine/trans has to turn to get the wheels moving. The only thing that is important is that all 4 wheels are turning the same speed. Or in non-TCS car, the ring gear (which is directly tied to wheel speed) is spinning the same speed as the front two wheels.
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ABS reads wheel sensors. It doesn't make a **** how many times the engine/trans has to turn to get the wheels moving. The only thing that is important is that all 4 wheels are turning the same speed. Or in non-TCS car, the ring gear (which is directly tied to wheel speed) is spinning the same speed as the front two wheels.
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Just out of curiosity, dont know if all fbodies are like this or someone changed it in the past. We went to put an 02 ABS module in an 01, and the brake lines were different. On the 01 the two rear lines went together and one line came forward to the ABS module. On the 02 it had 2 lines come from the rear into the abs module.
okay that clarifies it then. Thanks guys. Ill have to contact the guy I bought the module off of and find out what ratio was in the Firebird he took the unit out of. It is a non-tcs (3 carrier), which my car is, but I'm pretty they came with 308s and 273s also.
Thanks for the info again.
Thanks for the info again.
Last edited by augie1209; Jul 27, 2012 at 10:26 AM.
maybe not, I read lees last posr wrong, so basically as long as its a nontcs and I didn't change ratios I shouldn't have to mess with thd programming? since the abs gets the readings from the pcm?
Joined: Aug 2007
Posts: 24,241
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From: Turnin' Wrenches Infractions: 005
Took the words right of my mouth. Wheel sizes and gear ratio changes can cause the module to throw up an error. As long as the PCM (ABS doesn't care) is programmed with the correct overall tire diameter, and the correct ring gear ratio, you'll be fine. In fact there's a tolerance for slight discrepancy.
01redssa4, thanks for the great info but I'm lost.
If I have a car (02) with the TCS and I want to run a set of 18" wheels in the rear and 17" wheels in the front I would get a ABS Disabled light on my dash ?
What if the sidewalls of the rear 18" we're shorter and matched the front 17" rim and tire height, would that keep from throwing a light ?
I am not a fan of this option but I don't want any lights on my dash illuminated. I hate the TCS illuminated light on when I switch it off, and really wish the car didn't have it at all, maybe I could unplug it behind the panel and remove the bulb in the dash cluster ?
If I have a car (02) with the TCS and I want to run a set of 18" wheels in the rear and 17" wheels in the front I would get a ABS Disabled light on my dash ?
What if the sidewalls of the rear 18" we're shorter and matched the front 17" rim and tire height, would that keep from throwing a light ?
I am not a fan of this option but I don't want any lights on my dash illuminated. I hate the TCS illuminated light on when I switch it off, and really wish the car didn't have it at all, maybe I could unplug it behind the panel and remove the bulb in the dash cluster ?
Joined: Aug 2007
Posts: 24,241
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From: Turnin' Wrenches Infractions: 005
Rim size makes no difference. Its the rolling length or circumference of the tire that matters. You ARE allowed a certain amount of error and the ABS will still function. However, deviate too much and its a no go. How much error I couldn't tell you bc I've never tried it, but I bet with a little digging you could find some examples that could steer you in the right direction.
