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ABS Sensor

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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osmium
Posts: 208
Joined: 2 July 2009
Year and Model: 96 850 GLT
Location: Nashua, NH

Re: ABS Sensor

Post by osmium »

wheelsup wrote:That's weird I wonder what happened? Makes me scared to try it on my car.
Maybe I damaged the wire rying to get it out of the holder on the strut.

Once I get it back form the shop, I'll have a good look at the wires if the lights are still on.

-os
1996 850 GLT 262k miles (gone :( )

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1999 Honda Civic (gone)
1996 850 GLT (gone, no more Volvos :( )
2000 Buick Park Avenue (gone)
2005 Honda Odyssey (gone)
2013 Lexus ES350 (replaced Volvo 850)
2021 Honda Pilot

wheelsup
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Post by wheelsup »

Too bad you couldn't get the axle out too, was it rusted badly? My car spent 8 years driving around Nashua I am scared that all the bolts on the car are rusted.
1995 850 GLT Wagon w/ 200,000 miles

Cbom
Posts: 5
Joined: 18 January 2010
Year and Model: 06 S40+S60, 97 850
Location: Indiana

Post by Cbom »

I just finished replacing a hub assembly on my 850. Took it for a drive and now my ABS is coming on when stopping right after the car slows down to about 10 mph. After I came back home I decided to take it back out again to see if it was going to keep doing it.. When I started the car up the ABS and TRACS lights came on and stayed on and I had no ABS noise. I just had the module rebuilt about two months ago to solve this problem. Everything was going well until I made this hub replacement. I did unplug the ABS sensor while I was replacing the hub and then took the sensor out to clean the parts before putting everything back together. Do these sensors seem to fail pretty easily if you unplug them?

i hate my volvo
Posts: 12
Joined: 19 February 2010
Year and Model: 2000 v70xc
Location: El Dorado Hills, CA

Post by i hate my volvo »

when this happened to my car i was in a white out snow storm. i looked on the bright side though...i've always thought of myself as an automobile purist, so the elimination of driving aids such as abs and traction control turned my fear into a half cracked smile. question to those who may know...how properly will the volvo awd system function without the trac system operable? i should be just fine with the exception of the power interruption in slippage right? just in case it ever happens again. the volvo's awd is okay at best. nothing can compare to TORsen from audi. i've driven audi (torsen system not haldex), volvo, and subaru; and audi definitely wins the traction war. however...my insurance on my volvo is only 45 bucks a month for everything and the cops fly by me now instead of waiting behind me to fug up ;) thank you grandma status !!!

polskamafia mjl
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Post by polskamafia mjl »

Audis use the same system as Volvo...it's called Haldex. Torsen simply means torque sensing, aka the differnetial senses which tire has the most torque and applies power to that tire. I can't remember off the top of my head but I don't recall Audi using that system for a very long.

P.S. if you haven't noticed I don't much care for you handle. Sorry, just being honest.
'All my money is gone and I have an old Volvo.' - Bamse's Turbo Underpants

Current: 1995 Volvo 850 T-5R Manual - Bringing it back from the brink of death
Previous: 1996 Volvo 850 GLT - Totaled

osmium
Posts: 208
Joined: 2 July 2009
Year and Model: 96 850 GLT
Location: Nashua, NH

Post by osmium »

wheelsup wrote:Too bad you couldn't get the axle out too, was it rusted badly? My car spent 8 years driving around Nashua I am scared that all the bolts on the car are rusted.
I guess. I didn't have any problem with the axle nut and it looked pretty rusted on. Everything else came off with a problem. The axle stopped me cold. It's now at a local shop to get the whole job done.

I hated giving in but I got to get the car back on the road. But at least I know that I can replace the rotors and brake pads without any problem so at least I learned something.

-os
1996 850 GLT 262k miles (gone :( )

Image

1999 Honda Civic (gone)
1996 850 GLT (gone, no more Volvos :( )
2000 Buick Park Avenue (gone)
2005 Honda Odyssey (gone)
2013 Lexus ES350 (replaced Volvo 850)
2021 Honda Pilot

wheelsup
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Post by wheelsup »

So it was stuck in the hub/splines? That's odd, I just took apart a '95 and the axle nut was rusted severely but the impact wrench took it off no problem, and the axle backed out easily with a little nudging from a 3/8" extension bar. As far as I can tell it was an original axle, here are some pics, looks pretty rusted!! I was surprised at how easily it slid out actually.

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1995 850 GLT Wagon w/ 200,000 miles

osmium
Posts: 208
Joined: 2 July 2009
Year and Model: 96 850 GLT
Location: Nashua, NH

Post by osmium »

[quote="wheelsup"]So it was stuck in the hub/splines? That's odd, I just took apart a '95 and the axle nut was rusted severely but the impact wrench took it off no problem, and the axle backed out easily with a little nudging from a 3/8" extension bar. As far as I can tell it was an original axle, here are some pics, looks pretty rusted!! I was surprised at how easily it slid out actually.

How did you nudge it out with the extension bar?

I pounded on mine pretty good and was getting worried i was going to damage something else.

-os
1996 850 GLT 262k miles (gone :( )

Image

1999 Honda Civic (gone)
1996 850 GLT (gone, no more Volvos :( )
2000 Buick Park Avenue (gone)
2005 Honda Odyssey (gone)
2013 Lexus ES350 (replaced Volvo 850)
2021 Honda Pilot

i hate my volvo
Posts: 12
Joined: 19 February 2010
Year and Model: 2000 v70xc
Location: El Dorado Hills, CA

Post by i hate my volvo »

polskamafia mjl wrote:Audis use the same system as Volvo...it's called Haldex. Torsen simply means torque sensing, aka the differnetial senses which tire has the most torque and applies power to that tire. I can't remember off the top of my head but I don't recall Audi using that system for a very long.

P.S. if you haven't noticed I don't much care for you handle. Sorry, just being honest.
as far as audi not using TORsen for very long..they've used and not really changed the same torsen design in every performance model from the coupe gt/coupe quattro cars of the 1980's to the new audi r8. they would never replace it with the haldex. haldex is only used in tt/a3/vw R32 platforms, basically if the engine is transverse mount. if it is linearly mounted(like every audi i've ever owned--1990 audi 90 20v, 1991 audi s2, 1993 audi s4, 2001 audi s4) it is torsen. even audi realized the limitations of haldex and utilizes TORsen to this day on most street models and all high performance models s4/rs4/s6/rs6/s8/r8/r10tdi (all of which are linear mount). torsen is a fully symmetrical true awd system while haldex is a fwd system that helps when additional traction is necessary. haldex is more fuel efficient therefore appealing to the masses. i like my volvo but i would never compare it's awd capabilities to my TORsen audi. the volvo awd is problematic and easily broken. while stock torsen systems are proven and daily driven with over 800hp. http://www.80tq.com/20vtMotor.html no one has raced more awd cars than audi. the world rally attempted to ban torsen quattro due to it's superiority.

holler1
Posts: 756
Joined: 25 June 2008
Year and Model:
Location: West Virginia

Post by holler1 »

i hate my volvo wrote:...how properly will the volvo awd system function without the trac system operable? i should be just fine with the exception of the power interruption in slippage right?
My understanding is that the Volvo AWD system is strictly mechanical. The only thing that is ever decoupled is the viscous coupler, which senses a difference in rotation speed between front and rear. So TRACS being off should not affect it other than the slippage issue you mentioned.

Re: ABS sensors. I have had intermittent problems with the wiring to one front wheel sensor, and had to repair the connector due to the wiring getting brittle and loose from the connector. Check the connector wiring- you have have broken it trying to get it off the strut.
1998 Volvo V70 AWD 165000-R muffler, HD endlinks, boost gauge
2008 Ford Fusion AWD 107000
2000 Ford Ranger 4wd 172000
1991 Toyota Camry 160000#1
Previous: 1982 Volvo DL (240) 160000
1998 Tacoma, Fords (6), Dodge, Montero,
GTO, Sunbeam Alpine, VW Dasher
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