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Code Help Needed 850 1996

posted by  amnesia on  Sun Mar 28 13:16 CST 2004
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I've got a general question about DTC codes and my 1996 850 Turbo.

I'm considering buying an OBD II code reader (Innova 3100). Recently my AC light was flashing and the dealer told me it is an indicator that there is a heater/AC code in the computer. When the dealer read the code it was a fault with the cabin temperature sensor fan.
My question is, will such codes be read by an OBD II reader, or do you need Volvo's diagnostic equipment to read such non "engine management" codes?

ALso, what is the difference between the OBD II codes and Volvo's 3 digit codes.

Thanks for the help
Amnesia








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    Code Help Needed 850 1996

    posted by  amnesia on  Sun Mar 28 15:36 CST 2004
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    Thanks for the info
    Do you think the 3100 is a worthwhile investment given it's limited application?
    What other systems are not going to be read by it in the Volvo?

    Amnesia








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    Code Help Needed 850 1996

    posted by  Hamfisted on  Sun Mar 28 14:59 CST 2004
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    If your 850 was a '95 or older you would be able to read the A/C codes through the DTC boxes under the hood, this is where Volvo would get their 3 digit code from. On '96 and newer 850's you need a sophisticated ScanTech type tool with the software for a Volvo in it to read the A/C codes, and these would be displayed as OBD-II codes in the P15xx range. The generic code readers like the Innova 3100 or the Actron 9135 are not going to show the A/C codes for a Volvo. They will show the codes for a Ford, GM, or Chrysler but not the Volvo. The cabin temperature sensors are located behind those little holes right above the overhead grab handles for the driver and front passenger. Try using a vacuum cleaner to suck the dust out of the fan blades and see if that frees them up. Its a good idea to do this at least once a year. They seize up from dust built up on the blades. Good luck.


    Mike
    '95 850T







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