2005 S60 ABS Pump Motor Replacement Topic is solved

[ReWagner]

For some time I have had an ABS message - with trouble codes BTM0070 (pump motor supply voltage, faulty signal) and BCH0072 (pump motor, mechanical error). The online information that I could find suggested that the likely problem was a faulty Brake Control Module.

At first the ABS message was intermittent, then continuous. I got a used BCM and replaced the old one. That solved the problem for a while, but it became intermittent again, then continuous.

I sent the original BCM to XeModEx and had it rebuilt, to repair the power leads and to put a more robust pump driver in it. That solved the problem for a while again, but the ABS message soon returned intermittently. I called XeModEx and they told me that often the pump motor is faulty, rather than the BCM.

So I bought a used ABS pump motor and replaced the old one. That has solved the problem.

I am posting because I could find no reliable information on how to replace the ABS pump motor itself, without taking the entire ABS pump assembly out of the vehicle. That would have required the brake lines to be removed from the ABS pump assembly, and when the ABS pump assembly is reinstalled the brake lines would need to be bled.

Instead, I found that it is possible to remove and replace the ABS pump motor without taking the ABS pump or the BCM out of the vehicle. That avoids the need to remove the brake lines from the ABS pump, so it is not necessary to bleed the brake lines after the repair.

I am including what I learned about how to make the ABS pump motor replacement in the attached document. There are some photos in the attachment that may help understand how to do it. Perhaps this information will be useful to someone with the same problem.

[kcodyjr]

Submitted for consideration for the VRD.

Matthew, I was expecting it to send you a note, but then it told me to change the first post icon, which I don't think I have privilege to do.

[abscate]

Duly iconned for the VRD. Thanks for sharing this!

[ReWagner]

Correction: the error codes were BCM-0070 and BCM-0072.

Additional information: the vehicle has 120,000 miles on it.

[komatiite]

My first post on here coming from Swedespeed forum. Cheers! I am replacing the ABS pump on our 2004 V70 and am using this thread as a guide. I bought a used ABS module including the BCM, and removed the ABS pump motor from the assembly. The seal stuck to the block and I am having some time getting it reinstalled on the motor in preparation for mounting to the car. Any suggestions on how to easily install the seal, and more importantly all of the tiny nodules on it back in the holes?

[precopster]

I recently replaced the ABS pump on my 2001 XC70 because of an ABS pump motor faulty signal ABS-0070 and all along the problem was a missing fuse from position 19!! The car was new to me and someone had removed the fuse; a great practical joke on me!!

I replaced the pump by replacing the whole block and BCM. This meant I needed to bleed the lines. My original problem was a mushy pedal. It took a hand operated vacuum bleeder to bleed the lines and find the original cause of the spongy pedal. The original ABS unit was fine all along. The hand operated vacuum pump eventually yielded some old looking dirty brake fluid that looked like flat Coca-Cola that must have been trapped somewhere in the system.
Looks like replacing the whole dice may be easier with that easy to damage seal on the pump in there. Good bleeding procedure is therefore pretty essential.

[komatiite]

I was going to replace out the entire assembly, but then read on here (link below) that I could easily just swap out the ABS pump motor. I took it out of the used unit I got, and the bearing stayed in place, but unfortunately, the seal came out of the motor and stayed on the block. It was almost a test to see how things fit before messing with the unit still installed in the car. Seeing as how I have probably spent 2 hours trying to get the seal back on (seriously), I'm thinking I should have just removed the brake lines and been done with it.

https://www.matthewsvolvosite.com/forums ... =9&t=77863

[abscate]

Welcome komatiite.....that sounds like a nasty so thanks for the heads up

[komatiite]

Yeah, 'm thinking I'm going to call xemodox and see if they can tell me how they replace the seal when they rebuild an ABS motor. They offer the service to rebuild the pump, so they must have someway to get that darn seal on it.

[vtl]

I replaced the pump by replacing the whole block and BCM. This meant I needed to bleed the lines. My original problem was a mushy pedal. It took a hand operated vacuum bleeder to bleed the lines and find the original cause of the spongy pedal.

For years I've been fighting with a mushy pedal in my XC70. Bled so many times, last few attempts system were under 2 bar pressure. Even replaced master cylinder - nothing. It turned out that I had to trigger ABS control valves, which released a lot of air trapped inside ABS module.

The morale: if the brake system was opened in the engine compartment, it's a great chance of need for using DiCE/VIDA along with the brake bleeder.