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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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RickHaleParker
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by RickHaleParker »

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

The Volvo part number you need is 9401542. 1995 is the last year they used that part number.
The only thing I'm finding at this time is Pre-owned for $30.00 and new for $670.79 with lifetime warranty and unlimited returns.
Last edited by RickHaleParker on Mon Dec 11, 2017 9:00 pm, edited 2 times in total.
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scot850
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by scot850 »

Matty's web-site is:

https://www.midwest-abs.com/

Only thing is I don't see a pre-96 option for 850's. Best to e-mail him from his web-site.

Neil.
2000 V70 R - still being an endless PITA
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2015 Kia Sportage EX-L
1993 850 GLT -Sold
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1997 Volvo 850 SE NA - Went to niece in California - Sold
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Roger_850T
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by Roger_850T »

Have you tried clearing the codes and waiting to see what comes back? If you have never cleared them, then they could be old to very old, and meaningless at this point. I would clear and see what comes back, and THEN start diving into replacing parts.

Here is some info from VIDA:

DTC information 1-2-X, 2-1-X, 2-2-X, 3-2-X

DTC 1-2-X.
If the control module finds signals from wheel sensors are subject to electromagnetic interference, are varying too much or are subject to short intermittent open/short circuits at speeds below 40 km/h (25 mph), it posts DTC 1-2-1, 1-2-2, 1-2-3 or 1-2-4, depending on which wheel sensor is involved.
DTC 2-1-X.
If the control module finds there is no wheel sensor signal on moving off from speeds under 6 km/h (4 mph), or if the slowest wheel is turning at a speed less than 60 % of the fastest wheel, but still finds that the circuit is unbroken, it posts DTC 2-1-1, 2-1-2, 2-1-3 eller 2-1-4, depending on which wheel sensor is involved.
DTC 2-2-X.
If the control module finds from the wheel sensors that a wheel has not moved (signal stops) for up to 28 seconds (exact time depends on driving conditions) while driving or while ABS is in operation, it posts DTC 2-2-1, 3-2-2, 3-2-3 or 3-2-4, depending on which wheel sensor is involved (assumes that the wheel sensor circuit is unbroken).
DTC 3-2-X.
If the control module finds that the signal from the wheel sensor is affected by electromagnetic interference, is varying too much or is subject to short intermittent open/short circuits at speeds over 40 km/h (25 mph), it posts DTC 3-2-1, 3-2-2, 3-2-3 or 3-2-4, depending on which wheel sensor is involved.

Substitute value
ABS/TRACS switched out. For DTC 1-2-X, the ABS system is disabled at speeds up to 40 km/h (25 mph). The ABS warning indicator only comes on at speeds over 20 km/h (12 mph).
With DTCs 1-2-1 and 1-2-2, the ABS system is only disabled on the front wheelsif the speed is below 40 km/h (25 mph). The ABS system cuts in as soon as the fault disappears. The ABS system cuts out completely at speeds over 40 km/h (25 mph).

Possible source
- Loose contacts in leads/joints.
- Lead insulation damaged.
- Contact resistance in connectors.
- Ground and signal leads are too near a source of interference.
- Wheel sensor loose.
- Wheel sensor faulty.
- Pulse wheel faulty.
- Some wheel was locked while driving.
- Play in wheel bearings or axle vibration.
- Hydraulic unit faulty.

Note! With the ignition on, DTCs may be posted if the car is jacked up or if one or more wheels are turned fast enough.
'05 XC90 V8 140k
'95 854T 310k
'02 V70 159k
'03 S80 111k (crashed)
'93 945T 217k (gone to be parted out)
'87 245 300k+ sold, still going
'84 264 Diesel, RIP at 160k
'78 242 manual everything.
'73 P1800ES, fun until the rust set in...
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Roger_850T
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by Roger_850T »

For the 1-4-1 error, this is the little switch that's mounted in the brake booster. The solder joints fail and become intermittent. This is repairable by removing, disassembling the switch, re-soldering the connector to the circuit board, reassemble, and replace. I found a good writeup somewhere, I'll look for it again. Meanwhile, here's VIDA again:

DTC information1-4-1

Condition
If control unit finds that pedal sensor circuit:
is shorted to ground or supply.
has an open circuit in the circuit.
is giving a faulty signal.
it posts DTC 1-4-1

Substitute value
ABS/TRACS cutting out.
Possible source
Signal lead shorted to ground or supply
Open circuit in ground or signal lead
Ground and signal lead shorted to one another
Faulty pedal sensor
Contact resistance in terminals

Fault symptom
None.
'05 XC90 V8 140k
'95 854T 310k
'02 V70 159k
'03 S80 111k (crashed)
'93 945T 217k (gone to be parted out)
'87 245 300k+ sold, still going
'84 264 Diesel, RIP at 160k
'78 242 manual everything.
'73 P1800ES, fun until the rust set in...
User avatar
Roger_850T
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Joined: Tue Dec 31, 2013 11:55 am
Year and Model: 854T 1995
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Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by Roger_850T »

The 1-4-2 DTC goes along with the 1-4-1. It looks at both the brake light and the brake pedal position sensor, and turns on this DTC if there's a mismatch between the two.

My bet: The 2-1-3 and 2-1-4 are old, from when you were doing some maintenance on the car at some point. The issue you have is the failing brake pedal position sensor, that is causing both the 1-4-1 and the 1-4-2.

Roger
'05 XC90 V8 140k
'95 854T 310k
'02 V70 159k
'03 S80 111k (crashed)
'93 945T 217k (gone to be parted out)
'87 245 300k+ sold, still going
'84 264 Diesel, RIP at 160k
'78 242 manual everything.
'73 P1800ES, fun until the rust set in...
User avatar
Roger_850T
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Posts: 289
Joined: Tue Dec 31, 2013 11:55 am
Year and Model: 854T 1995
Location: Frederick MD
Been thanked: 15 times

Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by Roger_850T »

Here is a good overview of the system:
https://www.volvoclub.org.uk/tech/servi ... ontrol.pdf
'05 XC90 V8 140k
'95 854T 310k
'02 V70 159k
'03 S80 111k (crashed)
'93 945T 217k (gone to be parted out)
'87 245 300k+ sold, still going
'84 264 Diesel, RIP at 160k
'78 242 manual everything.
'73 P1800ES, fun until the rust set in...
User avatar
Roger_850T
MVS Moderator
Posts: 289
Joined: Tue Dec 31, 2013 11:55 am
Year and Model: 854T 1995
Location: Frederick MD
Been thanked: 15 times

Re: 1995 Volvo 850 Turbo TRAC and ABS light

Post by Roger_850T »

THIS is the thread I was looking for. I did this and it was the fix for my '95 850T.

https://www.volvoforums.org.uk/showthre ... 192&page=5

Good luck!

Roger
'05 XC90 V8 140k
'95 854T 310k
'02 V70 159k
'03 S80 111k (crashed)
'93 945T 217k (gone to be parted out)
'87 245 300k+ sold, still going
'84 264 Diesel, RIP at 160k
'78 242 manual everything.
'73 P1800ES, fun until the rust set in...
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