2000 S40 brake issue - no fluid from ABS pump to one wheel?
Thread Starter
|
Super Moderator
Joined: Mar 2012
Posts: 9,601
Likes: 540
From: Burlington, VT
2000 S40 brake issue - no fluid from ABS pump to one wheel?
My 2000 S40 brakes started pulling to the right - so I has my mechanic check for a stuck caliper. he said the caliper looked fine but noticed it was not getting any fluid to the front left wheel. When they took the line off the ABS pump module - again no fluid came out when the brakes were activated... Does it make sense that the pump module could fail or clog to one wheel only or should I be checking sensors etc? Used anti-lock pumps are cheap enough to find but looking to see if anybody has experienced a similar failure.
Senior Member
Joined: Mar 2012
Posts: 732
Likes: 6
Can't really help you with the specific question but I can tell you I exercise my ABS systems as often as is practical/safe. Before you do anything you might try this as I think it's possible that the ABS valves can stick. So brake hard on dry pavement in a safe location until your ABS activates. Do this a few times and see what happens.
From your story it appears you may now have one brake line full of air. Your mechanic should not really have left your car in that condition. If you do try my trick and free up your ABS module be prepared for very poor braking action after that until your brakes are bled.
From your story it appears you may now have one brake line full of air. Your mechanic should not really have left your car in that condition. If you do try my trick and free up your ABS module be prepared for very poor braking action after that until your brakes are bled.
Last edited by migbro; Dec 28, 2014 at 04:51 PM.
Thread Starter
|
Super Moderator
Joined: Mar 2012
Posts: 9,601
Likes: 540
From: Burlington, VT
Good thought...
Can't really help you with the specific question but I can tell you I exercise my ABS systems as often as is practical/safe. Before you do anything you might try this as I think it's possible that the ABS valves can stick. So brake hard on dry pavement in a safe location until your ABS activates. Do this a few times and see what happens.
From your story it appears you may now have one brake line full of air. Your mechanic should not really have left your car in that condition. If you do try my trick and free up your ABS module be prepared for very poor braking action after that until your brakes are bled.
From your story it appears you may now have one brake line full of air. Your mechanic should not really have left your car in that condition. If you do try my trick and free up your ABS module be prepared for very poor braking action after that until your brakes are bled.
Senior Member
Joined: Mar 2012
Posts: 732
Likes: 6
The blind leading the blind now. Doesn't make any sense to me but if it sounds good to you go for it. You're probably going to wind up replacing the ABS unit regardless.
Thread Starter
|
Super Moderator
Joined: Mar 2012
Posts: 9,601
Likes: 540
From: Burlington, VT
post mortem on this I ruled out the ABS control module due to the lack of codes and assumed one of the valves just got stuck in the pump itself Too cold out to tear the unit apart etc so I replaced the pump unit with a used part I got for $75, bled the brakes and all is good. Now I have a spare control unit to boot and I may take apart the old pump for a look...
Senior Member
Joined: Mar 2012
Posts: 732
Likes: 6
post mortem on this I ruled out the ABS control module due to the lack of codes and assumed one of the valves just got stuck in the pump itself Too cold out to tear the unit apart etc so I replaced the pump unit with a used part I got for $75, bled the brakes and all is good. Now I have a spare control unit to boot and I may take apart the old pump for a look...
Thread
Thread Starter
Forum
Replies
Last Post
kennta
1998-2000 model year V70
1
Jan 4, 2015 05:31 AM
mortonight
General Volvo Chat
0
Jan 23, 2010 08:34 PM
katiejoyful
Volvo 240, 740 & 940
1
Dec 12, 2007 04:49 PM