Login Register

ABS Pump or Controller on scanned 850 ?

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
Post Reply
laser
Posts: 6
Joined: 27 August 2017
Year and Model: 2001 V40
Location: City

ABS Pump or Controller on scanned 850 ?

Post by laser »

What is most likely, cracks in the soldering on the ABS control unit on the 850 or ABS pump?

Have managed to get 3 error codes on Volvo 850 -96 via OBDII (ELM327)
ABS-313 LRear wheel sensor open/short
ABS-314 RRear wheel sensor open/short
ABS-443 Pump motor fault

I don't want to disassemble the control unit in sheet metal if there is a fault with the ABS pump, without the 443 fault I would have been more sure of only the wrong control unit.
Top
User avatar
xanthefin
Posts: 444
Joined: 4 May 2019
Year and Model: 1997 850
Location: Pluto
Has thanked: 106 times
Been thanked: 130 times

Post by xanthefin »

For Control Unit my voice at least.
Pump has larger power connecter which solders just goes absolute horrible condition after aging and thermal plus vibration cycles if not yet ever opened and fixed.

I seen personally multiple times pump code with cracked abs units on 850 along with sensor codes.
Top
jmartin919
Posts: 298
Joined: 12 July 2013
Year and Model: S70 GLT SE 2000
Location: Durham, NC
Has thanked: 94 times
Been thanked: 39 times

Post by jmartin919 »

I was commenting to another poster that the ABS on my '93 makes a very brief scrapping sound shortly after starting up and driving but works fine and gives me no codes, You mention the condition of the solder joints in the control unit and it got me to wondering if maybe the scrapping I'm hearing is the pump not getting the full current it needs due to weak solder joints. The control unit is original with about 200K on it.
'00 S70 GLT SE
'82 MB 380SL
'11 MB E350 Sport
'84 Chevy C10
'93 850 GLT NA SOLD
Top
User avatar
foggydogg
Posts: 2948
Joined: 17 October 2009
Year and Model: '98 V70 R, 97 850 T5
Location: District Of Columbia, not one of the Several States
Has thanked: 83 times
Been thanked: 402 times

Post by foggydogg »

Pumps rarely fail, cold solder joints on the control unit are a sure thing.
69 1800s, @500k Death by Rust
94 850 Turbo, T-boned, ambulance for me, crusher for it
97 855 T5, 855 R projects
98 V70R x2, Silver Junkyard rescue, Coral Red
98 V70GLT x2, parts cars
00 V70xc x2, both now dead
62 122s, gone to live in Richmond
56 445 Duett basket project
1950 Studebaker 2R10 flatbed, T9 crashbox
Top
User avatar
abscate
MVS Moderator
Posts: 35267
Joined: 17 February 2013
Year and Model: 99: V70s S70s,05 V70
Location: Port Jefferson Long Island NY
Has thanked: 1497 times
Been thanked: 3809 times

Post by abscate »

jmartin919 wrote: ↑04 Feb 2024, 19:33 I was commenting to another poster that the ABS on my '93 makes a very brief scrapping sound shortly after starting up and driving but works fine and gives me no codes, You mention the condition of the solder joints in the control unit and it got me to wondering if maybe the scrapping I'm hearing is the pump not getting the full current it needs due to weak solder joints. The control unit is original with about 200K on it.
If it is a brief sound at 10-15 mph on first acceleration after key off, that’s the normal system self-test
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
Top
jmartin919
Posts: 298
Joined: 12 July 2013
Year and Model: S70 GLT SE 2000
Location: Durham, NC
Has thanked: 94 times
Been thanked: 39 times

Post by jmartin919 »

That's what it is. Thanks
'00 S70 GLT SE
'82 MB 380SL
'11 MB E350 Sport
'84 Chevy C10
'93 850 GLT NA SOLD
Top
laser
Posts: 6
Joined: 27 August 2017
Year and Model: 2001 V40
Location: City

Post by laser »

Thanks for answers.
It was control unit.
Top
User avatar
abscate
MVS Moderator
Posts: 35267
Joined: 17 February 2013
Year and Model: 99: V70s S70s,05 V70
Location: Port Jefferson Long Island NY
Has thanked: 1497 times
Been thanked: 3809 times

Post by abscate »

I’ll guess 990:10 control unit to pump failures on the P80 chassis
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
Top
User avatar
erikv11
Posts: 11800
Joined: 25 July 2009
Year and Model: 850, V70, S60R, XC70
Location: Iowa
Has thanked: 292 times
Been thanked: 765 times

Post by erikv11 »

I'll go 992:8
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6 :shock: 153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k
Top
Post Reply
  • Similar Topics
    Replies
    Views
    Last post

Return to “850, S70, V70, C70, V70-XC 1992-2000”