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-   -   bleeding abs module??? (http://www.jeepgarage.org/f5/bleeding-abs-module-17661.html)

jdcollins86 01-19-2011 12:18 AM

bleeding abs module???
 
My dealer says i need to scan the abs module??? and wants to charge me 500$ I tore the metal hose that runs to the caliber from the break line??? do i need to scan the module??:confused: the break reservoir is dry except for the back part of it to the rear of my jeep.:confused::confused::confused:

jdcollins86 01-19-2011 12:23 AM

Re: bleeding abs module???
 
1 Attachment(s)
heres a pic

Scottina06 01-19-2011 12:46 AM

Re: bleeding abs module???
 
I have no idea what they are talking about unless you ruined something from no fluid. Did you put a new brake line on? If so you may need to bleed the system...but they wouldnt charge you $500 for that. You may need a new module

SvenskaJeepGuy 01-19-2011 01:02 AM

Re: bleeding abs module???
 
you most likely ruined the brake module from running with no fluid. that does seem like expensive work

DGoral31 01-19-2011 01:09 AM

Re: bleeding abs module???
 
holly crap, i thought this thread was about your stomach muscles bleeding!! was hoping to get some gory pics and all i got was a pic of some brake lines... :sleepy::sleepy::sleepy::sleepy:

2005JGC 01-19-2011 02:11 AM

Re: bleeding abs module???
 
Yeah, what you said doesnt actually mean anything. What I mean by that is, its like saying they need to repel the flux capacitor... your saying WHAAAa?? I know thats what I am saying reading your post, that said, if its exactly what they are telling you, tell them you want to talk to the tech and have him explain what needs to be done. Sometimes the service writers trying to explain things very foreign to them and they have to do it like they know what they are talking about or you dont buy it, so they throw a couple techy words in there not because they are the right ones but to sound s-m-r-t.

500 seems kinda low for the module especially considering there would be labor to install and base-abs-base bleed the system. I believe on the grand the abs module must be replaced as a hydraulic control unit/pump assembly.

Get the actual low down, figure out exactly what they are doing and we can go from there.... it does sound too expensive.

jdcollins86 01-19-2011 02:11 AM

Re: bleeding abs module???
 
i just got home from work today so tomorrow im going to pick up the line from the dealer and hope for the best...ill let you know

imeh 01-19-2011 05:32 AM

Re: bleeding abs module???
 
When you change the brake line, there is usually no need to do anything but a normal brake bleed. The only time it is necessary to bleed the ABS module by hooking up to the scan tool is if the hydraulic portion is changed. I would suggest replacing the part, bleeding the system as you would normally until you get a good pedal, drive the vehicle in a safe location an push hard enough on the brake pedal to activate ABS a couple of times, bleed the system again. This assumes that there are no malfunction lights on after you complete the regular bleed.

MSCA 01-19-2011 06:58 AM

Re: bleeding abs module???
 
Quote:

Originally Posted by jdcollins86 (Post 337472)
My dealer says i need to scan the abs module??? and wants to charge me 500$ I tore the metal hose that runs to the caliber from the break line??? do i need to scan the module??:confused: the break reservoir is dry except for the back part of it to the rear of my jeep.:confused::confused::confused:


What the dealer means is this: When air gets into the braking system at the master cylinder, you can't just bleed it like you would bleed your brakes at each caliper. This is a very common issue these days on modern vehicles with ABS. They need to hook up a scan tool that will pulsate the ABS module. Without doing that, it's basically impossible to get all of the air out of the ABS module. And that means your ABS might not function properly.

$500 does seem high for that service, unless they are also including repairs as well.

BTW, this is why it's so important to ensure that the master cylinder's fluid level doesn't drop too low during brake bleeding. The last thing you want is to get air into the system at the master cylinder and then have to pay the dealer to get the air out of the ABS module.

imeh 01-19-2011 07:14 AM

Re: bleeding abs module???
 
Quote:

Originally Posted by MSCA (Post 337523)
What the dealer means is this: When air gets into the braking system at the master cylinder, you can't just bleed it like you would bleed your brakes at each caliper. This is a very common issue these days on modern vehicles with ABS. They need to hook up a scan tool that will pulsate the ABS module. Without doing that, it's basically impossible to get all of the air out of the ABS module. And that means your ABS might not function properly.

$500 does seem high for that service, unless they are also including repairs as well.

BTW, this is why it's so important to ensure that the master cylinder's fluid level doesn't drop too low during brake bleeding. The last thing you want is to get air into the system at the master cylinder and then have to pay the dealer to get the air out of the ABS module.

Air will not get into the ABS system even if all of the fluid drains from the brake system and the ABS valves are not opened. Once the parts of the ABS system that are blocked from the normal brake fluid path have fluid, the fluid will not drain out unless the valves are opened when the brake system empty.

MSCA 01-19-2011 07:18 AM

Re: bleeding abs module???
 
Quote:

Originally Posted by imeh (Post 337526)
Air will not get into the ABS system even if all of the fluid drains from the brake system and the ABS valves are not opened. Once the parts of the ABS system that are blocked from the normal brake fluid path have fluid, the fluid will not drain out unless the valves are opened when the brake system empty.

The ABS system uses the same brake fluid that's in the rest of the system. So if you get air into brake system at the master cylinder, you will absolutely end up with air in the ABS module. An air bubble is an air bubble. Once it gets in at the master cylinder, there's no way for a backyard mechanic to get it out. You have to pulse the ABS module and that requires a scan tool that the dealer uses.

If you don't believe me, look it up. There is plenty of information on the Internet about people getting air into the ABS module.

StoneCold 01-19-2011 01:40 PM

Re: bleeding abs module???
 
If it's a replacement module, you're more than likey looking at $$$. A guy at work is having no end of hassle with the module on his Vauxhall Vectra. His bill is almost 1,500!!!:eek:


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