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Thread: Ambient Temperature Sensor

  1. #1
    Join Date
    Mar 2005
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    Pacific Northwest
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    Default Ambient Temperature Sensor

    Hi Gang:

    01 XC70 85k miles.

    Have intermittent outside temperature reading issues. Seems to have occurred when the weather got warmer here but not sure since it is fairly intermittent.

    Called dealer for parts and found there are 2 outside sensors, one in each side mirror. Used my BSR PPC Volvo code reader and got no codes related to ambient sensor.

    Have any ideas on how I can isolate which side is failing? As luck would have it, the parts are different for each side. Maybe I have to wait until it fails more frequently
    SOLD 2001 V70XC @123k 20mpg. No more Volvos due to shift to better gas mileage
    SOLD 2001 V70 T5 @132k 22mpg.
    2013 Tesla Model S 85kWhr 21k miles 90 eMPG. Best car ever
    2011 Toyota Prius Model2 49k 60mpg
    2001 VW Golf GLS 1.8T Auto 145k Fahrvergnügen but only 24mpg
    http://freewebs.com/howardsvolvos/

  2. #2
    Join Date
    Feb 2003
    Location
    Dimock, PA
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    Default

    I could be wrong on this, but after having a nasty encounter with a deer several years ago I was told that the ambient temperature sensor on US spec cars was in the passenger side rear view mirror and that there was no temperature sensor in the driver side mirror. Is it possible that the two sensors have to do with left hand versus right drive models? I'm just guessing. Or perhaps these are position sensors for automatic mirror adjustments and not the temperature?
    Bill
    03 XC70 OSD (Traded-in 4/12)
    05 AWD S80 OSD
    12 XC70 T6

  3. #3
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    Feb 2009
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    Alberta, Canada
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    Default

    On a somewhat related note - my temperature sensor consistently reports a temperature 3-4 degrees celsius above the actual air temp. I don't really care one way or another but I'm curious if this happens to anyone else?

  4. #4
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    Default

    Quote Originally Posted by BillAileo View Post
    I could be wrong on this, but after having a nasty encounter with a deer several years ago I was told that the ambient temperature sensor on US spec cars was in the passenger side rear view mirror and that there was no temperature sensor in the driver side mirror. Is it possible that the two sensors have to do with left hand versus right drive models? I'm just guessing. Or perhaps these are position sensors for automatic mirror adjustments and not the temperature?
    Yes, everywhere I read also suggest only on the passenger side mirror. But the volvo parts guys got my VIN and said the diagram shows there is one inside both the right and left side mirrors.

    I guess I'll wait for the next failure and maybe get a heat gun/ice pack out to see if I can figure out which side is the problem.
    SOLD 2001 V70XC @123k 20mpg. No more Volvos due to shift to better gas mileage
    SOLD 2001 V70 T5 @132k 22mpg.
    2013 Tesla Model S 85kWhr 21k miles 90 eMPG. Best car ever
    2011 Toyota Prius Model2 49k 60mpg
    2001 VW Golf GLS 1.8T Auto 145k Fahrvergnügen but only 24mpg
    http://freewebs.com/howardsvolvos/

  5. #5
    Join Date
    Sep 2002
    Location
    Belgium
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    Default

    I vaguely remember reading somewhere that the car has 2 sensors for (outside) temperature reading,
    one for the airco and one for the DIM display. The one for the DIM would be located at the passenger side.
    Willy
    144 GL (1974)--->244 GL (1982)--->940 GLE 2.3i (1992)--->XC70 2.5T (2004)

  6. #6
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    Sep 2002
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    Belgium
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    Default

    I just took a quick look at the wiring diagrams, the outside temperature sensor (item 7/11)
    is located in the outside mirror at the passenger side.
    Willy
    144 GL (1974)--->244 GL (1982)--->940 GLE 2.3i (1992)--->XC70 2.5T (2004)

  7. #7
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    Default

    Quote Originally Posted by Willy View Post
    I just took a quick look at the wiring diagrams, the outside temperature sensor (item 7/11)
    is located in the outside mirror at the passenger side.
    Willy
    Thanks Willy, my VADIS says that too. I'll go ahead and order that for replacement.
    SOLD 2001 V70XC @123k 20mpg. No more Volvos due to shift to better gas mileage
    SOLD 2001 V70 T5 @132k 22mpg.
    2013 Tesla Model S 85kWhr 21k miles 90 eMPG. Best car ever
    2011 Toyota Prius Model2 49k 60mpg
    2001 VW Golf GLS 1.8T Auto 145k Fahrvergnügen but only 24mpg
    http://freewebs.com/howardsvolvos/

  8. #8
    Join Date
    May 2009
    Location
    Chocolate Town USA
    Posts
    1,185

    Default

    Passenger side.

    Be carefull since it might also be the passenger side door moduale that is going bad.

    Have had that happen in all the 01/02 cars I have seen or family owns where the door module goes bad .

    01V70XC
    02V70XC
    01V70T5
    01V70T5
    02V70
    2012 Ford Fusion 2004 V70XC 01 V70XC -M66 1998 C70 T5-M66

  9. #9
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    Pacific Northwest
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    Default

    Quote Originally Posted by Chilled Man View Post
    Passenger side.

    Be carefull since it might also be the passenger side door moduale that is going bad.

    Have had that happen in all the 01/02 cars I have seen or family owns where the door module goes bad .

    01V70XC
    02V70XC
    01V70T5
    01V70T5
    02V70
    Interesting. I pulled the codes with my BSR Volvo code reader and got the following

    DDM-0049

    Reading up on VADIS shows DDM is the drive side control module internal fault. However, everything on the driver door works. Windows power up and down, mirrors move, central lock and child lock all works.

    I don't have a PDM code (passenger door module)

    Not sure the DDM code is related because the ambient temperature sensor is connected to the PDM.

    Reading more on VADIS, I thought I clarify some info on the ambient temperature sensors discussed earlier. VADIS says

    - Right hand mirror contains ambient temp sensor for the DIM. This is true for both LH and RH drive cars
    - Left hand mirror contains ambient temp sensor for the ECM
    SOLD 2001 V70XC @123k 20mpg. No more Volvos due to shift to better gas mileage
    SOLD 2001 V70 T5 @132k 22mpg.
    2013 Tesla Model S 85kWhr 21k miles 90 eMPG. Best car ever
    2011 Toyota Prius Model2 49k 60mpg
    2001 VW Golf GLS 1.8T Auto 145k Fahrvergnügen but only 24mpg
    http://freewebs.com/howardsvolvos/

  10. #10
    Join Date
    Sep 2002
    Location
    Belgium
    Posts
    2,103

    Default

    If no problem(s) can be found, perhaps it is worthwhile to take a close look at the wiring harness,
    especially where it leaves the door (think rear hatch problems).
    Willy
    144 GL (1974)--->244 GL (1982)--->940 GLE 2.3i (1992)--->XC70 2.5T (2004)

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