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Speedometer stopped working

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

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5rivers
Posts: 533
Joined: 27 February 2009
Year and Model: V70 1998 T5
Location: The North Country, NYS
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Speedometer stopped working

Post by 5rivers »

Hi Everyone,

I went on a short trip this morning, about 6 miles, and realized that my speedometer stopped working. Any ideas on what might cause this? Are there cable connections I should be looking at, ABS sensors to clean? Could it be electrical? Any way to find out?

Appreciate any suggestions!
5rivers
1998 V70 M56, silver/grey, has tranny issues, #?# owner, 330,xxx miles, a handy parts car
1998 V70 AT, nautical blue, 2nd owner, 260,000 miles, Sold
1998 V70 AT, T5, forest green, 3rd owner, 172,300 miles, Mimas 16" rims

scot850
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Year and Model: 2000 V70 R
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Post by scot850 »

I am trying to remember if the P80's -98 have a separate speed sensor on the transmission. The ABS module can also cause this issue when they start to fail, but I would check the ABS sensors and front reluctor rings on the outer end of the axles for dirt/rust/damage.

There is information somewhere here or possibly on Matty's Mid-West ABS website on resistance values for the ABS cables.

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

5rivers
Posts: 533
Joined: 27 February 2009
Year and Model: V70 1998 T5
Location: The North Country, NYS
Been thanked: 14 times

Post by 5rivers »

I will check on those spots and report back. Thank you!

If it helps narrow the troubleshooting, the odometer has stopped working as well.
5rivers
1998 V70 M56, silver/grey, has tranny issues, #?# owner, 330,xxx miles, a handy parts car
1998 V70 AT, nautical blue, 2nd owner, 260,000 miles, Sold
1998 V70 AT, T5, forest green, 3rd owner, 172,300 miles, Mimas 16" rims

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Sveedy
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Year and Model: 96 850 Turbo
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Post by Sveedy »

This happened to me a couple of weeks back. Turned out to be a lose connector going into one of the distribution blocks under the dash.
In my case, I found that the purple slide lock that holds the plugs firmly in place, had been left unseated by a tech from the previous owner.
I was having other weird intermittent dash issues as well till I found that lock, so this is probably not your cause. But who knows....
Try to learn life's bad lessons vicariously through others.


1996 850 Turbo GLH ( Goes Like Hell )
1999 V70 GLT

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RickHaleParker
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Post by RickHaleParker »

Is your ABS working as it should?
Scan the DTCs and look for DTCs for the ABS.

The P80 ABS are known to get cracked solder joints where connector is soldered on the PCB. The speedometer a wheel sensor data data stream from the ABS. When that signal is lost due to a cracked solder joint(s) the speedometer quits also.

You can get a Remanufactured P80 ABS on eBay for as low as $75.00 with core exchange.
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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. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.

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