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ABS light random and idle question

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

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

scot850
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Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
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scot850

Re: ABS light random and idle question

Post by scot850 » Thu Apr 11, 2019 12:19 pm

You may have both errors, switch and ABS module. Haven't had the switch cause the speedo to drop out but the ABS senor failing will cause that. Try to see what codes you can pull. If a speed sensor error shows up it will most likely be the ABS module.

When I had a failing module it gave all sorts of weird issues with whole speedo cluster.

A re-built ABS module is a good investment from our good friend Matty Moo at Mid-West ABS. Costs a little more, but he does an exchange process where you can have your module until the new one arrives, swap it and then return the old one. He will need the part number on the module. Go to his web-site for more info.

Neil.


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

vovo850
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Year and Model: 1995 850 glt
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vovo850

Re: ABS light random and idle question

Post by vovo850 » Thu Apr 11, 2019 2:06 pm

No problems with the speedo yet.
It's my understanding when the module goes it's because of cracks in the solder.
Not too hard to reflow solder.


1995 Volvo 850 GLT N/A automatic wagon

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erikv11
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erikv11

Re: ABS light random and idle question

Post by erikv11 » Thu Apr 11, 2019 6:00 pm

Agreed, many have the soldering skills (but I don't). But opening and closing the case without butchering it is part of the challenge, check out ways others have figured out how to get that done. Maybe get one from a junk yard to try on. Or get a JY one and swap it in and be done (for a while)!


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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abscate
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abscate

Re: ABS light random and idle question

Post by abscate » Thu Apr 11, 2019 6:23 pm

You need a serious solder iron, not a circuit board one, like a 200 watt Weller. It’s about half the price of a good tested unit from Matty


Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW

vovo850
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Re: ABS light random and idle question

Post by vovo850 » Fri Apr 12, 2019 10:08 am

I have a nice butane one. I think it's up to the task.


1995 Volvo 850 GLT N/A automatic wagon

Matty Moo
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Matty Moo

Re: ABS light random and idle question

Post by Matty Moo » Fri Apr 12, 2019 2:01 pm

He has a 95, it's a different abs system. It doesn't have the failure issues like the 96 and up.
These users thanked the author Matty Moo for the post:
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http://www.midwest-abs.com
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1996 850 Platinum Wagon. ARD Green Tune, OBX.-Gone
1998 s70 ARD tune, EST exhaust, SE/R interior.
1999 s70 Plain Jane.
2000 s70 GLT
2014 Ram
2012 Jeep Wrangler Unlimited

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