ABS stuck valve?

Tiny
LEE334111
  • MEMBER
  • 2006 VOLVO V70
  • 2.5L
  • 5 CYL
  • 2WD
  • AUTOMATIC
  • 172,000 MILES
I noticed the right rotor and caliper were totally rusted. I found that there is no brake fluid going to that wheel. I discovered that during an emergency braking situation the car skids to the left and forward for about 20 feet or more. De rusted the caliper and rotor, checked the line going Flushed the brake system and put new fluid in. Still no fluid to that wheel, all other wheels working fine. Long story short, it strongly seems that the valve on that line is stuck in the ABS module. No ABS lights show. Trying to unstick the valve, which is closed tight has been unsuccessful. Went to the salvage yard and found an almost identical ABS unit and car (same interior colors, and all).
However, it is an s60. But is the same year 2006 the same model2.5T, 2wd, is STC like our v70 is and NOT DSTC, has the same size wheels, tires and rotors, has the same exact numbers on the pump and the brake control module, all the same numbers except while our unit shows it was made in Mexico and has the number 05W ( and three numbers ), the s60 module says it was made in Mexico and has the same 05W beginning, ( but the three numbers are off by 51 units made (if that is what it means )
The total module is nice and clean as ours is and all four valves were gushing brake fluid out, when we took it off the car.

Question is.

Can we just take that module and switch it over to our car without causing problems to the system? Or does it need to be programmed in some kind of way?

And if it needs to be programmed, how does it need to be and what would the cost be?

and as an alternative can we separate the part of the unit from the pump and control module, and just take the metal rectangular box that the line to the wheels comes out of which houses the valve, and switch that over to our pump and control module, and use that as is, and not have to program it?

Thank you so much for your help.
Here is a picture of the control module from the s60 that has all the same info save for a few numbers from the 05W number on it.
Tuesday, February 21st, 2023 AT 10:17 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,347 POSTS
I do not see the images. Can you please reload them? If the system has fluid coming from the ABS unit, then I am thinking it is the rear brake flex hose that has collapsed internally. Can you undo the line at the front part of the hose to see if you have the same problem? Also, if the ABS valve unit looks the same from both units you can swap the existing module onto the new valve and motor unit, and you should be okay. Here are the ABS module replacement instructions in the images below for reference. Please let me know.
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Tuesday, February 21st, 2023 AT 3:54 PM
Tiny
LEE334111
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Hello Ken,

Thanks so much for getting back to me. Your answer about switching the metal rectangular part that houses the valves and the lines coming out to the four wheels and their calipers without needing anything to be programmed or coded, for things to work, is very heart warming.
I am not sure if you got what I was saying about what is wrong with the v70 so I still do not know if the whole abs unit from the s60 can be switched over to the v70, and function with no programming or codes needed, due to it being so very similar to the abs on the v70, and the two cars being so similar ( ie. Both 2.5t, both 2wd, both STC and non DSTC, both having the same exact rotors, wheels, tires, etc. )
To try to be clearer.
We are talking about the caliper and brake system not working, or functioning on the front right ( passenger side ) wheel, due to no fluid coming to the caliper from the line (that has been tested to be known as clear and functioning ) ( with injected fluid into it )
Because the valve on the abs is stuck shut for that front right wheel
While all the other lines are getting fluid from the abs as the other three lines have valves that do open and close, unlike the
Front right wheel that is not getting any fluid from the ABS, because the valve to that line is stuck shut ( even with the car off )
The front right ( passenger side ) wheel only gets fluid
To the caliper. If we inject the fluid into the line manually
But there is not a drop of fluid coming out of the abs unit
To that line, as the valve is stuck shut and will not allow fluid to come
Out of the abs unit for that line ( while all the other three valves
And lines and wheels work fine.
My main question and our biggest fear, is that taking the entire abs unit we got from the s60 that is functioning with all four valves, and putting it on our v70 might cause permanent damage to the system
If it was supposed to be reprogrammed for our v70, before putting
On the v70. As it is not plug and play, and needs some kind of code or programming to work right on the v70.
So, if we try to put the s60 abs unit on the v70 as is
Which is taken off the s60 with no code or programming done to it.
Would taking it back off our v70, leave us with a spoiled network, Electonic system?
Due to the computers being compromised for having had the s60 put on the car and turning the car on, to see if all is fixed?

We would like know that if we try putting the entire s60 ABS unit onto the v70, as is,
With no programming changes or coding done to it, might turning the electronics and computers on, on the v70, end up damaging the v70
Permanently, in any way.
And if the s60 unit does not work to get fluid to all four lines, take it off and separate just use the valve part of the unit, to put on the v70
To get the right front wheel part of the ABS system again.
I should say we have never seen an ABS light on the system and obd2 is not picking up a problem.
However I have to drive with the STC turned off, because if I leave the STC on, the car skids forward and to the left for about 20 feet or more
And I lose control during that time.
And the right rotor and caliper rust, due to no fluid causing the brake to apply the pads to the rotor.

I hope this makes it a "little" more clear.

Here are the pictures of the s60 unit we took off the junk yard car
And the last picture was taken of our brake control module, which is not clear, as it is on the car and in very low light.
Otherwise our ABS unit looks the same as the s60 one does, including its condition.

Thank you so much for your help, I am so grateful!
Blessings and be well

Pictures 1, 2 and 4 are the S60 ABS unit,
Pictures 3 and 5 are OUR v70 ABS unit
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Thursday, February 23rd, 2023 AT 12:59 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,347 POSTS
If the last to images are the tags for each ABS unit you might be okay because they are the same part number but a different version number, as far as doing permanent damage I don't think will happen, but if you are afraid of installing it don't do it and wait to get the OEM replacement part. There is no comprehensive part exchange protocol that will give us a definite yes or no answer on this type of problem. Do the electrical connections look the same? Usually when the plugs are different, they changed something in the system, FYI.
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Friday, February 24th, 2023 AT 11:13 AM

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