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1995 Volvo 850 Turbo TRAC and ABS light

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

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misha
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by misha »

It's time to pm Matty Moo.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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RickHaleParker
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by RickHaleParker »

Ok here are the codes I got ...

2-1-3 Left Rear Wheel Sensor, Signal Absent When Moving Off
2-1-4 Right Rear Wheel Sensor, Signal Absent When Moving Off
1-4-1 Faulty Pedal Sensor, Short To Ground Or Voltage
1-4-2 Faulty Brake Light Switch, Open Or Short Circuit

The link below will take you to a ton of information on the 1995 Volvo 850 ABS system.

https://www.volvoclub.org.uk/tech/servi ... ontrol.pdf
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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misha
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by misha »

I doubt that all those malfunctions happened at the same time.The only explanation is in faulty abs module(cold solders) since they are known to go bad without exceptions.
Although abs units up to '95 have minimum chance of failure...they can also go bad.
Pm Matty Moo and see what he have to say about that.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
winter4w
Posts: 7
Joined: Wed Nov 22, 2017 6:45 pm
Year and Model: 1995 Volvo 850
Location: Phoenix AZ

Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by winter4w »

misha wrote: Fri Dec 01, 2017 5:34 am It's time to pm Matty Moo.
Guess ill PM him to this thread
RickHaleParker wrote: Fri Dec 01, 2017 6:30 am Ok here are the codes I got ...

2-1-3 Left Rear Wheel Sensor, Signal Absent When Moving Off
2-1-4 Right Rear Wheel Sensor, Signal Absent When Moving Off
1-4-1 Faulty Pedal Sensor, Short To Ground Or Voltage
1-4-2 Faulty Brake Light Switch, Open Or Short Circuit

The link below will take you to a ton of information on the 1995 Volvo 850 ABS system.

https://www.volvoclub.org.uk/tech/servi ... ontrol.pdf
Yea I was looking at that. Could it be possible it all failed?
misha wrote: Fri Dec 01, 2017 6:49 am I doubt that all those malfunctions happened at the same time.The only explanation is in faulty abs module(cold solders) since they are known to go bad without exceptions.
Although abs units up to '95 have minimum chance of failure...they can also go bad.
Pm Matty Moo and see what he have to say about that.
Yea seeing all those errors made me wonder the same thing. Looking on eBay it looks like the 1995 Modules are cheap. I may just buy one on eBay and put it in and see how it works. Here is one I found (https://www.ebay.com/itm/1993-1995-Volv ... Cb&vxp=mtr)
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misha
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by misha »

No.
There are two types of those modules....the ones that failed and those that didn't failed YET.
Matty Moo rebuilds them(resolder them) and you're good to go as far as car lasts. ;)
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
winter4w
Posts: 7
Joined: Wed Nov 22, 2017 6:45 pm
Year and Model: 1995 Volvo 850
Location: Phoenix AZ

Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by winter4w »

misha wrote: Sat Dec 09, 2017 7:57 pm No.
There are two types of those modules....the ones that failed and those that didn't failed YET.
Matty Moo rebuilds them(resolder them) and you're good to go as far as car lasts. ;)
Looking at the website I don't see anything about the 1995 ABS modules only 1996 and up. Also if I did get one off eBay is it plug and play or do they need to be programmed?
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misha
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by misha »

Your choice.
No need for programing.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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abscate
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by abscate »

There are two types of those modules....the ones that failed and those that didn't failed YET(either one you can buy on eBay,,,)

:-)
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by RickHaleParker »

Yea I was looking at that. Could it be possible it all failed?

It is possible but highly improbable that 4 sensors failed. The probability that the defect is a common component is high. The ABS control module is common to all four sensors and is known to cause these symptoms.

Comb through the descriptions on eBay. There are vendors that not only remanufacture the ABS control module, they also re-engineer the problem so that it does not come back. There are two different ABS modules. One for cars equipped with TRAC and one for cars not equipped with TRAC, get the right one.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
winter4w
Posts: 7
Joined: Wed Nov 22, 2017 6:45 pm
Year and Model: 1995 Volvo 850
Location: Phoenix AZ

Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by winter4w »

misha wrote: Sun Dec 10, 2017 3:54 am Your choice.
No need for programing.
Ok awesome. Also where would I go to contact Matty Moo?
abscate wrote: Sun Dec 10, 2017 4:22 am There are two types of those modules....the ones that failed and those that didn't failed YET(either one you can buy on eBay,,,)

:-)
Yea I know that risk however considering they are $20-$30 not much of a loss. If a replacement one works from eBay I could always still send the original one in for repair and reinstall it while having a spare one in case something does happen later on.
RickHaleParker wrote: Sun Dec 10, 2017 4:52 am Yea I was looking at that. Could it be possible it all failed?

It is possible but highly improbable that 4 sensors failed. The probability that the defect is a common component is high. The ABS control module is common to all four sensors and is known to cause these symptoms.

Comb through the descriptions on eBay. There are vendors that not only remanufacture the ABS control module, they also re-engineer the problem so that it does not come back. There are two different ABS modules. One for cars equipped with TRAC and one for cars not equipped with TRAC, get the right one.


Ok thanks, Do you have any links to sellers with repaired or fixed modules? The 850 we got does have traction control.
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