abs pump advice needed
Thread Starter
Instructor
Joined: Jun 2008
Posts: 101
Likes: 0
From: Justin TX
abs pump advice needed
I have a 2000 a4 with active handling. I have read through the stickies and am unable to find anything about the abs pump itself. My local shop tested my pump and it is bad. Is there an easy fix for this?
Safety Car
Joined: Jan 2001
Posts: 4,390
Likes: 693
From: Boise ID
You need to check and post the codes to help determine what the problem is. If the pump is bad, it needs to be replaced.
Here’s how to check codes.
http://www.c5forum.com/ayc/dtcdic.php
Here’s how to check codes.
http://www.c5forum.com/ayc/dtcdic.php
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 EBTCM opeates the pump. Thees a connector on the bottom od the main connector housing for the pump. Just disconnect it and apply 12 VDC to it and see if the pump runs. If it does, it NOT bad.
Hees a pictue of the BPMV and EBTCM
You can see the moto connector in this picture:
BC
Hees a pictue of the BPMV and EBTCM
You can see the moto connector in this picture:
BC
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 BPMV is sold as an ASSEMBLY and no repair parts are available. If you can get one from a salvage yard or private sale, that would save you some money. Other wise,,,call Gene Culley www.gmpartshouse.com and get a new unit.
If yours is truely bad, rip that bad boy apart and see if you can salvage it.
BC
BC
If yours is truely bad, rip that bad boy apart and see if you can salvage it.
BC
BC
Pro
Joined: Apr 2001
Posts: 539
Likes: 4
From: Rochester, NY
Bill,
I have been troubleshooting a Code 1243 (Stalled ABS Pump) in my YR 2000 vette for a while.
If I understand your statement correctly ("Just disconnect it and apply 12 VDC to it and see if the pump runs. If it does, it NOT bad"), and my BPMV runs with 12 volts, then it must be a ground or the EBCM.......Right
glowworm_76039: There is another forum member (sjbrothers) is looking for broken BPMV's so he can try to find a way to repair them. If you find out yours is broken and you want to donate it to his science project, please send him an e-mail
I have been troubleshooting a Code 1243 (Stalled ABS Pump) in my YR 2000 vette for a while.
If I understand your statement correctly ("Just disconnect it and apply 12 VDC to it and see if the pump runs. If it does, it NOT bad"), and my BPMV runs with 12 volts, then it must be a ground or the EBCM.......Right
glowworm_76039: There is another forum member (sjbrothers) is looking for broken BPMV's so he can try to find a way to repair them. If you find out yours is broken and you want to donate it to his science project, please send him an e-mail
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
Some people NEVER drive their car to the limits that it was designed to handle and don't cycle anti lock brakes or active handling system. . Nothing wrong with that except, the BPMV Pump can become stagnant and stick from non use-age. If you apply an external voltage to the pump and get it to spin and free up, it may resolve your issue.
When ever I drive the car in wet weather, I find a safe place to apply the brakes hard enough to activate the anti-lock and or active handling systems. What better way to get a feel for how the car feels in those conditions. Wet weather allows system activation without excessive strain on the suspension or excessive tire wear.
Yea,,,I find times on normal driving conditions that reach the limits also.
Cycle the pump a couple of times and see if that helps. What ya going to loose?
BC
When ever I drive the car in wet weather, I find a safe place to apply the brakes hard enough to activate the anti-lock and or active handling systems. What better way to get a feel for how the car feels in those conditions. Wet weather allows system activation without excessive strain on the suspension or excessive tire wear.
Yea,,,I find times on normal driving conditions that reach the limits also.
Cycle the pump a couple of times and see if that helps. What ya going to loose?
BC
Instructor
Joined: Jul 2008
Posts: 145
Likes: 2
From: Macon NC
Bill,
I have been troubleshooting a Code 1243 (Stalled ABS Pump) in my YR 2000 vette for a while.
If I understand your statement correctly ("Just disconnect it and apply 12 VDC to it and see if the pump runs. If it does, it NOT bad"), and my BPMV runs with 12 volts, then it must be a ground or the EBCM.......Right
glowworm_76039: There is another forum member (sjbrothers) is looking for broken BPMV's so he can try to find a way to repair them. If you find out yours is broken and you want to donate it to his science project, please send him an e-mail
I have been troubleshooting a Code 1243 (Stalled ABS Pump) in my YR 2000 vette for a while.
If I understand your statement correctly ("Just disconnect it and apply 12 VDC to it and see if the pump runs. If it does, it NOT bad"), and my BPMV runs with 12 volts, then it must be a ground or the EBCM.......Right
glowworm_76039: There is another forum member (sjbrothers) is looking for broken BPMV's so he can try to find a way to repair them. If you find out yours is broken and you want to donate it to his science project, please send him an e-mail
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Thread Starter
Instructor
Joined: Jun 2008
Posts: 101
Likes: 0
From: Justin TX
Thanks for the advice. I'm going to pull the pump next weekend and try to tear it apart and see if I can clean it up and try to make it work. If I come up with a way to make it work I will post what I came up with...
Burning Brakes
Joined: Oct 2004
Posts: 931
Likes: 35
From: Rowlett, Texas
Bill, are those pics of the ABS from a pre-2000 car?
I understand the early C5's had the ABS unit mounted near the rear axle, but the 2000 has it under the power steering in the engine compartment.
I had the 1243 code (stalling/dragging pump motor) in my 2000 last year, and had to partially disassemble the ABS unit to get to the proper contacts to "excercise" the pump motor. It's been awhile so I don't remember all the details (pin #8 I think) but we documented it here in the archives.
After several short 5-second runs, the motor amperage dropped significantly, lossening up quite a bit.
However, a year later, with no use of the aBS in driving, I occasionally get the code again. Gotta drive that thing harder I guess.
DG
I understand the early C5's had the ABS unit mounted near the rear axle, but the 2000 has it under the power steering in the engine compartment.
I had the 1243 code (stalling/dragging pump motor) in my 2000 last year, and had to partially disassemble the ABS unit to get to the proper contacts to "excercise" the pump motor. It's been awhile so I don't remember all the details (pin #8 I think) but we documented it here in the archives.
After several short 5-second runs, the motor amperage dropped significantly, lossening up quite a bit.
However, a year later, with no use of the aBS in driving, I occasionally get the code again. Gotta drive that thing harder I guess.
DG
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 97 and early 98 C5's had rear mounted EBTCM/BPMV: In late 98, they moved it to the front. Here is what they look like in the rear:
The late 98 up to 2000 have EBTCM that look some what different than the one in my pics. The one in my pictures is the 2001+ unit.
BC
The late 98 up to 2000 have EBTCM that look some what different than the one in my pics. The one in my pictures is the 2001+ unit.
BC
Thread Starter
Instructor
Joined: Jun 2008
Posts: 101
Likes: 0
From: Justin TX
Quick Update-
I work at a car dealership, and this is the busiest time of our year, so it will probably be mid february before I attempt to take the pump apart.
I'll keep you posted...
I work at a car dealership, and this is the busiest time of our year, so it will probably be mid february before I attempt to take the pump apart.
I'll keep you posted...
