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ABS / Tracs Issues (96 850 Turbo)

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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rokkein
Posts: 21
Joined: 20 November 2005
Year and Model: 96' 850 Turbo
Location:

ABS / Tracs Issues (96 850 Turbo)

Post by rokkein »

I've been dealing with some intermittent ABS (possibly TRACS) issues for a few months now. I sent my ABS computer to Victor in Cali to be repaired. I've also had all of the ABS sensors and wiring inspected. I replaced the ignition switch. Yet, a problem still persists.

The ABS light is on most of the time, but will turn off randomly (TRACS has never been on). I feel the brake pedal pulse at times near the end of braking. This is low speed, 5-10mph and under dry, flat conditions. I have actually also felt the brake pedal pulse WITHOUT my foot being on the brake (coasting to a stop) which makes me think TRACS.

What else can I try besides the option that the ABS computer was improperly repaired?

JRL
Posts: 9350
Joined: 22 November 2005
Year and Model: Several
Location: 19333
Been thanked: 16 times

Post by JRL »

Well, it's possible. My 1st rebuild was no good, the same thing happened.
I sent mine to www.modulemaster.com and they sent me another, (they had one in stock) and that cured it!
Sometime the processor is so corrupted that all the re soldering (the usual problem) in the world won't help
I would ask Victor for an exchange one if he has it, if not try to "borrow" one from the dealer :roll: (I can do this, but I realize most of you cannot)
If after another one is installed the light is still there and the pedal continues to pulsate you actually must have a bad wheel sensor, rare but very possible
A good dealer can test each sensor for correct signal

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