Will ABS work without ASR?
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
Will ABS work without ASR?
Ok, on to my next question;
I removed the ASR system (JUNK!) and now my ABS doesn't work either.
I'm not horribly concerned with it, but I would like it back. All I did was remove the ASR module and make a new throttle cable to go right to the throttle body.
I also cut lots of wires, is it possible I simply have to find the wire that I cut and splice it?
I removed the ASR system (JUNK!) and now my ABS doesn't work either.
I'm not horribly concerned with it, but I would like it back. All I did was remove the ASR module and make a new throttle cable to go right to the throttle body.
I also cut lots of wires, is it possible I simply have to find the wire that I cut and splice it?
Burning Brakes
Joined: Feb 2003
Posts: 1,212
Likes: 0
From: OH
I'd be interested in this myself. I just gutted my ASR yesterday, and thru it out. I can live without ABS, but sometimes its nice when I do something stupid and it keeps me from cording my Hoosiers.
Racer
Joined: Aug 2003
Posts: 403
Likes: 1
From: Cotati Ca
A guess would be that, since you can turn off the ASR and still have the ABS, then if done right, you should be able to remove it and still have ABS. But hey, this come to you not from actual experience 
.
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Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
I'll have to dig the book out, but the ABS and ASR share the same brain. So while you can turn ASR off and still have ABS, if you disable ASR, I'm not so sure the ABS would work. The EBTCM is located behind the drivers seat in the hatch compartment.
Why disable the ASR? Was it too hard to push the button?
BTW, my ASR doesn't work. WHen I did the coil conversion, I had to cut the tach filter off and the ASR only works when it feels like it. SO it's related to the ignition as well.
Why disable the ASR? Was it too hard to push the button?
BTW, my ASR doesn't work. WHen I did the coil conversion, I had to cut the tach filter off and the ASR only works when it feels like it. SO it's related to the ignition as well.
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
When you do an MSD ignition you have to bypass the tach filter. If you don't it will not run correctly over 3000 RPM's and the ASR / ABS lights come on as well. Bypassing the factory tach filter though gets it running correctly, the ASR even still works. Of course "works" depends on your frame of reference. It's still junk, but it does function as designed.
BTW you might want to contact forum member RUKWKR, he has removed his ASR. I don't know if his ABS works or not.
BTW you might want to contact forum member RUKWKR, he has removed his ASR. I don't know if his ABS works or not.
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Team Owner
Joined: Dec 1999
Posts: 34,873
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From: Lacey WA RVN 68-69
NCM Sinkhole Donor
When the ASR system operates, one of the things it does is to energize either the front or rear brakes depending on what inputs the ASR gets. Input to the ASR comes from the wheel speed sensors and the lateral accelerometer (located behind the CD head unit).
ASR can retard ignition timing, close the throttle, or apply braking pressure or alll of these depending on inout. Brake pressures is applied thu the ABS system.
The chances are that you have cut a wire that impacts the ABS unit. If the EBTCM has set a code, it can be retrieved with a scan tool or the paperclip method that allows code displays thru the digital speedo display.
I like my ASR system in my 92. It was very simple back in the early years compared to the later C5 system, but it did work. I leave mine on when the roads are wet and it does help from getting the car too far out of shape when I use too much throttle.
IIRC, sombody here was able to reconfigure the ASR to be "OFF" at startup instead of the factory "ON" default. But it's just as easy to push the button to turn the system off when you start the engine.
ASR can retard ignition timing, close the throttle, or apply braking pressure or alll of these depending on inout. Brake pressures is applied thu the ABS system.
The chances are that you have cut a wire that impacts the ABS unit. If the EBTCM has set a code, it can be retrieved with a scan tool or the paperclip method that allows code displays thru the digital speedo display.
I like my ASR system in my 92. It was very simple back in the early years compared to the later C5 system, but it did work. I leave mine on when the roads are wet and it does help from getting the car too far out of shape when I use too much throttle.
IIRC, sombody here was able to reconfigure the ASR to be "OFF" at startup instead of the factory "ON" default. But it's just as easy to push the button to turn the system off when you start the engine.
Burning Brakes
Joined: Feb 2003
Posts: 1,212
Likes: 0
From: OH
I think its less the issue of pushing the button (I did that for the past year I've owned the car), but that its really annoying to have to move that stupid ASR box out of the way every time I want to get to anything on the driver's side of the car.
Drifting
Joined: Jul 1999
Posts: 1,337
Likes: 0
From: Brighton, MI
If the computer isn't happy with what it sees at the wheel speed sensors (IE, removed), then it will also disable the ABS. I know this for a fact. I believe it was tjwong who developed the small board you can put in to default ASR to off at startup. I always have my ASR off. Sometimes pulling into traffic if your tires spin the smallest amount the car falls on it's face and I've almost been hit by oncoming traffic because my car wouldn't get up and go!
Team Owner
Joined: Aug 2000
Posts: 40,156
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From: San Pedro CA
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
Hey guys, thanks for all the suggestions.
This is a TRACK ONLY car, so to answer all of the questions about just pushing the button, well, there is no button. Nor is there a dash or digital display. I removed the ASR because it is a hindrance on the track and the car is gutted to be as light as possible.
I do have access to a Tech tool and will be checking codes tonight. The problem is that EVERYTHING electronic is removed except the BCM and ECM, therefore I'm going to have about 500 codes set. I'm going to have to filter through the airbag and PKE faults to find ones which might be relevant and are from systems that still exist on the car.
The wheel speed sensors are intact. All of the wiring to the ECM is also intact. The things I cut out were primarily to the BCM, and I didn't see anything mentioned in the schematic that goes to ABS. I'm going to start by tracing all of the wires back from the ABS/ASR module and see if I can find one that ends prematurely. Unfortunately, they're all bundled with the fuel pump wires so it's a pain in the ****.
I'll keep updating here...and keep the helpful suggestions coming.
This is a TRACK ONLY car, so to answer all of the questions about just pushing the button, well, there is no button. Nor is there a dash or digital display. I removed the ASR because it is a hindrance on the track and the car is gutted to be as light as possible.
I do have access to a Tech tool and will be checking codes tonight. The problem is that EVERYTHING electronic is removed except the BCM and ECM, therefore I'm going to have about 500 codes set. I'm going to have to filter through the airbag and PKE faults to find ones which might be relevant and are from systems that still exist on the car.
The wheel speed sensors are intact. All of the wiring to the ECM is also intact. The things I cut out were primarily to the BCM, and I didn't see anything mentioned in the schematic that goes to ABS. I'm going to start by tracing all of the wires back from the ABS/ASR module and see if I can find one that ends prematurely. Unfortunately, they're all bundled with the fuel pump wires so it's a pain in the ****.
I'll keep updating here...and keep the helpful suggestions coming.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Note that changing tire sizes can affect the ABS as well. This happened to Mackey, he had 28's on the rear and 26"s on the front.
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
Started tracing wires and reviewing the wiring diagrams. I removed the accellerometer in the IP. Don't know if that affects ABS, but I'll plug it back in and see what happens.
