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850R no obd2
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- Posts: 50
- Joined: Wed Jul 10, 2019 12:13 am
- Year and Model: 94 850
- Location: Seattle
- Has thanked: 4 times
- Been thanked: 2 times
850R no obd2
I recently purchased a 96 r, and its got a few faults. ABS light and TRACS light are intermittently on, but i know the cause for those, so im not too worried about it, but at startup, the service light will turn on as well, before shutting off shortly after. my coworker has got one of those crazy matco scan tools with volvo software installed on it, but for some reason, no matter how many times he updates his tool, it can never "connect" to my car. I'm assuming there is some connection malfunction somewhere along the line, but im not sure what to check for, or where to start. for a little background, the previous owner installed some shitty aftermarket head unit, and did an equally shitty job installing it; could he have messed a connection up in the process?
'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)
'88 245 DL who knows (bought for $600)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)
'88 245 DL who knows (bought for $600)
- Clemens
- Posts: 1268
- Joined: Thu Sep 03, 2015 12:34 pm
- Year and Model: 96 855 R + 94 855 T5
- Location: Austria
- Has thanked: 108 times
- Been thanked: 59 times
Re: 850R no obd2
the 96 and 97 Volvo OBD2 is kinda weird. most obd readers cannot communicate with it if I remember correctly. i always have a Volbo dealer read the codes if any appear.
the service light comes on after a year or xx.xxx miles. It reminds you of the annual service.
The lights to worry about are the dreadful blinking arrow and the lambda sign (might be a different icon for US models).
the service light comes on after a year or xx.xxx miles. It reminds you of the annual service.
The lights to worry about are the dreadful blinking arrow and the lambda sign (might be a different icon for US models).
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V
Winter: 1994 855 T5M
Donor: 1995 854 10V
- matthew1
- Site Admin
- Posts: 10875
- Joined: Sat Sep 14, 2002 11:03 am
- Year and Model: 850 T5, 1997
- Location: Denver, Colorado, US
- Has thanked: 717 times
- Been thanked: 312 times
Re: 850R no obd2
What year 850 are we talking about here? Your profile lists a 1994 850, but the title says 850 R, which is a 1996 or 1997.
NM. I see your signature has a '96 854R.
A 1996 should connect. It is a fully functioning OBD-II system.
A head unit will not affect OBD.
NM. I see your signature has a '96 854R.
A 1996 should connect. It is a fully functioning OBD-II system.
A head unit will not affect OBD.
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1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a kickback.
1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

- erikv11
- Posts: 10144
- Joined: Sat Jul 25, 2009 2:03 pm
- Year and Model: 850, V70, S60R, XC70
- Location: Iowa
- Has thanked: 129 times
- Been thanked: 364 times
Re: 850R no obd2
Yeah I agree, I would try a scanner that you know can connect to an 850 (or VOL-FCR etc.), before suspecting any problem with the car's OBD2. I suspect it is the scanner.
For the service light the fix is to remove the bulb.
For the service light the fix is to remove the bulb.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6
130k
gone: '96 NA 850 210k, '98 NA V70 182k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6

gone: '96 NA 850 210k, '98 NA V70 182k
- matthew1
- Site Admin
- Posts: 10875
- Joined: Sat Sep 14, 2002 11:03 am
- Year and Model: 850 T5, 1997
- Location: Denver, Colorado, US
- Has thanked: 717 times
- Been thanked: 312 times
Re: 850R no obd2
Go ahead and get yourself a cheap OBD-II code reader. They're under $20, and it'll pay for itself many times over with your three OBD Volvos.
My Autel cheapie OBD-II scanner works every time, almost ten years later.
My Autel cheapie OBD-II scanner works every time, almost ten years later.
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a kickback.
1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a kickback.
1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

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- Posts: 50
- Joined: Wed Jul 10, 2019 12:13 am
- Year and Model: 94 850
- Location: Seattle
- Has thanked: 4 times
- Been thanked: 2 times
Re: 850R no obd2
I own a scanner just like that one Mathew. I'll try it when i get home. I was just concerned because, i assumed if a specialized scan tool failed to connect, it was an issue with the car
'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)
'88 245 DL who knows (bought for $600)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)
'88 245 DL who knows (bought for $600)
- Goupil
- Posts: 133
- Joined: Mon Feb 04, 2019 12:52 pm
- Year and Model: 98' V70 LPT
- Location: Brittany
- Has thanked: 7 times
- Been thanked: 14 times
Re: 850R no obd2
Might be a dumb question, but do you even have power to the OBD plug ?
When I got mine it had a blown fuse, iirc the obd fuse is shared with the AC
When I got mine it had a blown fuse, iirc the obd fuse is shared with the AC
1998 Volvo V70 B5254T M56
1993 Volvo 940 D24TIC M46
1993 Volvo 940 D24TIC M46
- matthew1
- Site Admin
- Posts: 10875
- Joined: Sat Sep 14, 2002 11:03 am
- Year and Model: 850 T5, 1997
- Location: Denver, Colorado, US
- Has thanked: 717 times
- Been thanked: 312 times
Re: 850R no obd2
Sometimes the simplest effort is the most successful. More advanced technology always equals more variables. Reducing variables is the heart of troubleshooting.Mstrshkbrnnn wrote: ↑Wed Oct 02, 2019 4:25 pm I own a scanner just like that one Mathew. I'll try it when i get home. I was just concerned because, i assumed if a specialized scan tool failed to connect, it was an issue with the car
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a kickback.
1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a kickback.
1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

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- Posts: 50
- Joined: Wed Jul 10, 2019 12:13 am
- Year and Model: 94 850
- Location: Seattle
- Has thanked: 4 times
- Been thanked: 2 times
Re: 850R no obd2
just checked the fuse, and yes, it is receiving power. when my roommate get back home im gonna use his cheapo scanner that Matthew was recommending, and i'll get back to the thread with the results.
'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)
'88 245 DL who knows (bought for $600)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)
'88 245 DL who knows (bought for $600)
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