Volvo RWD 900 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 8/2006 900 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

960 Temp Guage Inop 900 1994

posted by  will rehsper on  Tue Oct 12 05:07 CST 2021
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Tue Jul 3 14:55 CST 2012
[RELATED]

Spent a little time diagnosing the parent’s ’94 960 over the weekend. Thanks to the FAQ (and OBD1) we were able to quickly diagnose the surging idle and hot start issue as the coolant temperature sensor at the back of the head. FAQ was also helpful in finding the right replacement part number. Thanks for that.

Unresolved is temperature gauge. It’s stone dead. The sensor has been replaced at some time over the last 20+ years of ownership and the electrical connection underhood looks good. Each one of these I’ve seen fails open, pegs the gauge at hot. So I’m tempted to blame something at the gauge cluster. Does this make sense? What to look for?
The other gauges all work, though I did notice that the coolant level indicator light does not illuminate at all (after noticing it was low on coolant). Also wiring at the level sensor is corroded, insulation crumbling.

Thoughts on causes/fixes of the temp gauge are welcomed and appreciated. And of course any tips for the ECT sensor replacement.

Thanks,
Will
--
XC60 / Odyssey








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    960 Temp Guage Inop 900 1994

    posted by  pierso on  Tue Nov 9 15:44 CST 2021
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Sun Feb 24 06:56 CST 2013
    [RELATED]

    I bought a new sensor for my 1993 940 2.0T and because It proved a bit awkward to get the old one out, I put the new sensor in a drawer in my shed for later and bought an inline temp sensor (smartly anodised in blue) and jubilee clipped it in to place in the middle of the top hose, poked the two wires into the connectors I pulled off the original sensor and it works the original gauge just fine. I think it was £15 on eBay (UK). If for any reason I forgot to check there was coolant in the reservoir the top hose would probably get air in it and the gauge wouldn't come off the stop which I would be very suspicious of and would subsequently check.
    That's probably why they put the sensor on the block!

    Not had a problem with the other sensor you mention or the symptoms you described . . . Yet! So unfortunately can't help you there.

    regards








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    960 Temp Guage Inop 900 1994

    posted by  DanR on  Tue Oct 26 08:52 CST 2021
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Thu Oct 23 15:25 CST 2014
    [RELATED]

    Hi Will, it has been 20 years since I had my '94 960, Was there two sensors, one at the back, and one near the radiator hose at the t-stat? One was for the computer and the other was for the gauge. I am totally not sure about this though.
    --
    DanR








    •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

      960 Temp Guage Inop 900 1994

      posted by  will rehsper on  Tue Oct 26 10:06 CST 2021
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Tue Jul 3 14:55 CST 2012
      [RELATED]

      You got it Dan! The one in the back is for the computer.

      I still don't have a resolution to report. The car and new sensor are a couple states away and my father is in no particular hurry to resolve.

      Thanks for the reply

      -Will
      --
      XC60 / Odyssey








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    960 Temp Guage Inop 900 1994

    posted by  Volvo From Heck on  Tue Oct 12 08:51 CST 2021
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Mon Oct 13 20:56 CST 2014
    [RELATED]

    First thing you need to do is ground the engine temp sensor wire with the ignition on. If the gauge then reads full hot you will know that the wires and gauge are OK. If it doesn't read full hot further examination of the wire circuit and gauge are in order. - Dave







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.