No A/C - Does anyone have a service manual?
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2004-2007 Cadillac CTS-V General Discussion Discussion, No A/C - Does anyone have a service manual? in Cadillac CTS-V Series Forum - 2004 - 2007; Stock 06, nothing has been touched. A/C works one day, the next it blows hot air. No service message has ...
  1. #1
    backpachyderm is offline Cadillac Owners Member
    Automobile(s): 06 CTS-V
    Join Date
    Dec 2010
    Posts
    5

    No A/C - Does anyone have a service manual?

    Stock 06, nothing has been touched. A/C works one day, the next it blows hot air. No service message has ever appeared on the DIC. CCP never falls back to AC Off. High side and low side are 140ish, so it's not blocked. Checked all the fuses. Relay is switching power. Pulled the connector to the compressor, and it never receives power in any state of off/on/high/defrost. Engine revs slightly when the AC is switched on, but the clutch never tries to engage, not even for a split second.

    If this were a normal car I would pull the low pressure switch off the can and jump it as that is what I'm being led towards, but I can't find one in this car for the life of me. No one has schematics, and none of the parts houses around me have ever even seen one these. Does anyone have a service manual with the troubleshooting checklist, or any idea of what to check next? I have a feeling that I'm going to be paying a dealer $600 to replace a $20 part in the end, so I'm trying to avoid that inevitability.

    Thanks for any help.

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  3. #2
    darkman's Avatar
    darkman is offline Cadillac Owners Master
    Automobile(s): 2005 CTS-V
    Join Date
    Nov 2005
    Location
    Spring, Texas
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    6,998

    Re: No A/C - Does anyone have a service manual?

    See attached. (These are for the 2005 V - I do not know how they differ from an 06.)

  4. #3
    backpachyderm is offline Cadillac Owners Member
    Automobile(s): 06 CTS-V
    Join Date
    Dec 2010
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    5

    Re: No A/C - Does anyone have a service manual?

    Thanks for those, but that didn't help much. Seems everything leads down the path to checking BCM codes and data. Looks like EFILive is the only consumer priced product that will do that?

  5. #4
    nmaier2201's Avatar
    nmaier2201 is offline Cadillac Owners Connoisseur
    Automobile(s): 2006 CTS-V
    Join Date
    Aug 2007
    Location
    Chicago, IL
    Posts
    1,417

    Re: No A/C - Does anyone have a service manual?

    i have the 06 books... not a digital copy, so if you need I can look something specific up for you if you need.

    it's strange as it looks like you have checked most all of the stuff out already.... either way PM me if you need something from the 06 manual

  6. #5
    backpachyderm is offline Cadillac Owners Member
    Automobile(s): 06 CTS-V
    Join Date
    Dec 2010
    Posts
    5
    The wire to the compressor is broken somewhere in the loom. I have a temporary fix on until I can find where it has failed.

    Thanks for the help again.

  7. #6
    darkman's Avatar
    darkman is offline Cadillac Owners Master
    Automobile(s): 2005 CTS-V
    Join Date
    Nov 2005
    Location
    Spring, Texas
    Posts
    6,998

    Re: No A/C - Does anyone have a service manual?

    .....

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