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Thread: Central instrument panel not working?

  1. #1
    Join Date
    Jul 2018
    Location
    Tahmoor NSW
    Posts
    112

    Central instrument panel not working?

    G'day Gentlemen of the Brains Trust.

    The panel below the two central vents on the dash is not working at all, save the parking light/sensors and the height control lights.
    The temperature control, heated seats, DSC, fan speed and front and rear heater demister. The rear seat fan is running full bore and can not be turned off by switch. I have removed most of the fuzes in the glovebox for no success, can anyone point my nose in the right direction.

    Thanks in advance

  2. #2
    Join Date
    Nov 2019
    Location
    Brisbane
    Posts
    113
    Do you have LR scan tool like IIDTool or something you can pull the codes? This would be my first port of call.
    05 L322 Range Rover | BMW M62 4.4 | Cairns Blue
    07 Lexus GS450h | 2GR-FSE Hybrid | Blue Onyx Pearl

  3. #3
    Join Date
    Aug 2020
    Location
    Sydney
    Posts
    88
    If there is no success removing fuses, then I'd suggest looking at earth's... No idea where they are for that!

    You aren't getting water into the fuse box are you? And no one has mucked about with the fuse box adding extra relays?

  4. #4
    Join Date
    Jul 2018
    Location
    Tahmoor NSW
    Posts
    112
    nobody has been messing with the fuses or relays, just driving up the driveway front air went off and rear air blower up to full bore. I have had no problems with water entering the fuses.

    I'll have to read up on the GAP IID tool to be able to read the codes.

  5. #5
    Join Date
    Dec 2017
    Location
    wandin nth vic
    Posts
    456
    Try a hard reset . You know!
    Disconnect battery, touch cables together etc.

  6. #6
    Join Date
    Nov 2019
    Location
    Brisbane
    Posts
    113
    Quote Originally Posted by theelms66 View Post
    Try a hard reset . You know!
    Disconnect battery, touch cables together etc.
    This has saved me a few times! Good idea
    05 L322 Range Rover | BMW M62 4.4 | Cairns Blue
    07 Lexus GS450h | 2GR-FSE Hybrid | Blue Onyx Pearl

  7. #7
    Join Date
    Jan 1970
    Location
    Manly QLD
    Posts
    1,432
    You say there is a blower fan running? The "Final Stage Resistor" or FSR (manual calls it the "blower fan control module) is what controls the fan speed. It has a permanent 12V supply and the AC ECU provides a signal wire (2-5v) telling it what fan speed to run. If the FSR has failed it will either run the fan and not turn off - or no fan at all....

    There is an FSR for the front blower fan located above the drivers' footwell, and one for the rear seat blower fan in the center console.

    If you have a fan going full stick - Job #1 is unplug the FSR. it may be shorting the signal wire from the ECU causing funny stuff.
    L322 3.6TDv8 Lux

  8. #8
    Join Date
    Jan 1970
    Location
    Manly QLD
    Posts
    1,432
    What car we talking about?
    this is 07-09:

    RearBlower.PNG


    below is from RAVE manual for 02-05. It's the same, but the FSR is called "Output Stage" in this document. 02-05 have a different control panel (thumb dial vs rotary dial), but the system works the same.
    RearBlower2.jpg
    L322 3.6TDv8 Lux

  9. #9
    Join Date
    Jul 2018
    Location
    Tahmoor NSW
    Posts
    112
    Quote Originally Posted by irubix View Post
    This has saved me a few times! Good idea
    I have done this twice now (to be sure, to be sure) still no joy.

  10. #10
    Join Date
    Jul 2018
    Location
    Tahmoor NSW
    Posts
    112
    Quote Originally Posted by harlie View Post
    You say there is a blower fan running? The "Final Stage Resistor" or FSR (manual calls it the "blower fan control module) is what controls the fan speed. It has a permanent 12V supply and the AC ECU provides a signal wire (2-5v) telling it what fan speed to run. If the FSR has failed it will either run the fan and not turn off - or no fan at all....

    There is an FSR for the front blower fan located above the drivers' footwell, and one for the rear seat blower fan in the center console.

    If you have a fan going full stick - Job #1 is unplug the FSR. it may be shorting the signal wire from the ECU causing funny stuff.
    Now there is something I didn't know, I'll check it out in the morning. I have rung the dealer and waiting for his call back, but I'll check it out in the morning.

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