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Replacing ABS module/pump

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markalishous
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Replacing ABS module/pump

Postby markalishous » Mon Dec 01, 2014 11:52 am

When replacing the ABS module/pump will bleeding the brakes normally be enough to get any trapped air out of the abs pump? Is there anything else i should look out for when replacing the unit?

Cheers.

himynameisdaniel
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Postby himynameisdaniel » Mon Dec 01, 2014 3:33 pm

The ABS unit has its own mechanisms to vent air out of the system.
bleed your brakes properly and engage the ABS unit.
You also don't want to run ABS pump completely dry, run some fluid through it prior to installing
you can either send the command to it or take it on the road.

There are some useful videos on YouTube on replacing ABS pumps in new vehicles.
Whilst i haven't found a CJ specific video. the principals are basically the same.

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markalishous
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Postby markalishous » Mon Dec 01, 2014 3:45 pm

Cheers. My OBD cable can only read generic commands (no ABS related data ). I will take it out to a dirt track near my place and give traction control and ABS a work out. I take it traction control uses the ABS pump as i lost it with ABS when the pump died.

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GB-XRS
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Postby GB-XRS » Tue Dec 02, 2014 7:10 am

Did you get a replacement ABS pump?

I have a spare.
Cheers

Greg
EVO X RS tarmac rally car

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markalishous
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Postby markalishous » Tue Dec 02, 2014 7:56 am

yea i got a replacement one off ebay so fingers crossed that it works.

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lantourismo
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Postby lantourismo » Sat Jan 03, 2015 4:56 am

The abs pumps in these cars seem to be having a lot of issues.

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SEB15
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Postby SEB15 » Tue Jun 30, 2015 7:23 pm

just wondering if there is any update on this? Looking to tackle this job in the weekend as well, any tips will be great!
Cheers :)

himynameisdaniel
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Postby himynameisdaniel » Tue Jun 30, 2015 8:06 pm

If your going to replace the hydraulic unit then you will need to stop the brake fluid from emptying the master cylinder when you remove the ABS unit.

otherwise you will need to bench bleed the master cylinder
Regardless of how well you do this you will need to bleed all 4 calipers anyway. as a pocket of air can result in
1.) failure of the ABS system again.
2.) rupture of the pistons in your brakes (requiring a caliper rebuild)
3.) complete failure of your braking system with pedal straight to the floor.

I would want a power bleeder for this.

Strongly advise to check out the workshop manual for removal instructions.
It has a detailed view and also labels as to which pipes that go into the unit are which brake hose.

Ralliart08
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Re: Replacing ABS module/pump

Postby Ralliart08 » Tue Dec 06, 2016 7:58 pm

Hi I am a new member and I am after information on the abs as we have been told that the pump needs replacing and as everyone has said the cost is just rude , is ther anyone in Brisbane that can fix the problem at a reasonable cost .


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