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Thread: Cold air on passenger side

  1. #11
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    Default Still no heat

    Shogun
    Finally it is warm enough to work on the 5. Pulled the center console and inspected the stepper motor on the right side of the heater/air box, it works fine so I don't know what is causing only cold air to come out of the vent marked with the yellow arrow. Should I get warm air from any of the other vents on the passenger side? Passenger floor? Right side of console? Knee area on passenger side? It seems to me if it where a broken flap then I should get warm air from all the the other passenger vents except the one marked with the yellow arrow? Is this how it works?

    Quote Originally Posted by shogun View Post
    do you mean vents in center console rear end? If that is the same like on the E32, that is only ambient air, hot air comes from under the seat.


    http://bmwe32.masscom.net/johan/cent...ts_v1.1-1.html

  2. #12
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    Default

    The system is quite complicated and maybe you try to understand the German here, only about 50 pages ;-)
    training material for BMW technicians
    called
    Klimaautomatik IHKA (German language PDF)
    and you find it here, scroll down
    http://www.e38.org/e32/
    There are also a lot of drawings and data to check, for example each temperature sensor in the system, how to check and which data it should show at which degree Celsius.

    the control of each stepper motor is done by the IHKA control unit and it even compares the speed and things like that.

    Have you checked the flap you can see from the outside when you remove in engine room the black cover at the firewall to access the blower motor?
    As I mentioned some month back, the motor for the 2 outer flaps is on the driver side, and the passenger side flap is regulated from this motor too, bith with a bpowden cable. Maybe that is broken? Or just slipped out of the place where it should be?

    More to check here
    http://bmwe32.masscom.net/johan/ihka/ihka.html

    Edit: you mentioned the stepper motor works, but did you remove the stepper motor and check if the flap is broken?

  3. #13
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    Default Found the problem

    Found the problem. I pulled the vent cover in the center of the dash and looked down inside. Turning the ignition on and off the vent on the left moved with the step motor the vent marked with the yellow arrow did not. When I turned on the blower the vent on the right popped open, when I held it closed with a screwdriver heat began to blow out of the right vent. So it looks like this vent has no control. Now the question is do I have to pull the IHKA or can I fix it in place? I downloaded the manual and am trying to figure out which stepper motor controls the center vent. Looks like I am in for a evening of Google translation. Man I pray I don't have to pull the IHKA it looks like a real pain.



    Quote Originally Posted by shogun View Post
    The system is quite complicated and maybe you try to understand the German here, only about 50 pages ;-)
    training material for BMW technicians
    called
    Klimaautomatik IHKA (German language PDF)
    and you find it here, scroll down
    http://www.e38.org/e32/
    There are also a lot of drawings and data to check, for example each temperature sensor in the system, how to check and which data it should show at which degree Celsius.

    the control of each stepper motor is done by the IHKA control unit and it even compares the speed and things like that.

    Have you checked the flap you can see from the outside when you remove in engine room the black cover at the firewall to access the blower motor?
    As I mentioned some month back, the motor for the 2 outer flaps is on the driver side, and the passenger side flap is regulated from this motor too, bith with a bpowden cable. Maybe that is broken? Or just slipped out of the place where it should be?

    More to check here
    http://bmwe32.masscom.net/johan/ihka/ihka.html

    Edit: you mentioned the stepper motor works, but did you remove the stepper motor and check if the flap is broken?

  4. #14
    Join Date
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  5. #15
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    Default Which motor?

    Which motor 2 or 3 controls the left center vent marked with the yellow arrow?


    Quote Originally Posted by shogun View Post
    here the stepper motors are marked
    http://bmwe32.masscom.net/johan/ihka/ihka.html

  6. #16
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    Default

    should be 2, see pages 6,7,8,9 (maybe someone can reconfirm before you start)
    2.09 MB!
    http://www.e38.org/e32/klimaautomatik.pdf

    http://bmwe32.masscom.net/johan/cent...ts_v1.1-1.html
    http://www.bimmerboard.com/forums/posts/200205/

    good pics about a repair on this German site, download them
    http://www.e32-schrauber.de/bmw/s-ihka.htm

    pic in post 11 with JB weld, and in post 17 a pdf with a nicely made bracket,
    in post 19 he made bracket also for the motor to stop them
    http://www.7-forum.com/forum/5/ubelt...tml#post919044

  7. #17
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    Default I only have motor 1 and 3

    I only have motor 1 and 3, then I have a cable controls where motor 2 should be.



    Can I pull the dash and open the top of the vent tubing and access the flap from there? Without having to pull the IHKA out?


    Quote Originally Posted by shogun View Post
    should be 2, see pages 6,7,8,9 (maybe someone can reconfirm before you start)
    2.09 MB!
    http://www.e38.org/e32/klimaautomatik.pdf

    http://bmwe32.masscom.net/johan/cent...ts_v1.1-1.html
    http://www.bimmerboard.com/forums/posts/200205/

    good pics about a repair on this German site, download them
    http://www.e32-schrauber.de/bmw/s-ihka.htm

    pic in post 11 with JB weld, and in post 17 a pdf with a nicely made bracket,
    in post 19 he made bracket also for the motor to stop them
    http://www.7-forum.com/forum/5/ubelt...tml#post919044

  8. #18
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    May 2004
    Location
    Japan
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    Default

    I assume it is not possible, but I never tried it.
    I so far removed the complete IHKA control unit from my parts car, but that I did when there was almost nothing left inside the car, so that was much easier.

  9. #19
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    Default

    Do you know how the flap is attached to the rod? It seems to me that it has just fallen off. The stepper motor on the passenger side actuates both flaps I am assuming? I pulled the motor on the floor vent passenger side and opened the floor vent by hand. This allowed me access to the actuator for the center flaps. When I moved the arm only the center flap on the drivers side moved up and down. The center flap on the passenger side isn't attached to a motor on the drivers side is it?
    Last edited by shogun; 02-24-2017 at 07:19 AM.

  10. #20
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    Default

    was quite long time ago, no sharp memory.
    the drive side flap has a motor, and the passenger side flap is actuated from the drover side motor with a bowden cable. And that is accessible from the engine room.
    And that I found on a 10/1988 E32 750iL, maybe it is different on other production years.
    http://bmwe32.masscom.net/johan/cent...bulkhead_1.jpg


    once more go thru all the pics here
    http://bmwe32.masscom.net/johan/cent...ts_v1.1-1.html

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