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Thread: Stuck in low range P38

  1. 10th April 2011, 07:58 PM #11
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    roversmith
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    Frank

    The transfer case acctuator is an electic motor controled by the ecu under the passenger side front seat. Unfortunately they have a fault that when you change from one range to another the ecu doesnt cut the current to the acctuator motor once the range change is completed. this cooks the insulation in the motor and shorts out taking a couple of transitors in the controller with it. I think the acctuator motor has provision to rotate it manualy from under the car. Cant remember the direction of rotation, but as mentioned jack stands are very cheap insurance with air suspension.

    Cheers Greg
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  2. 10th April 2011, 09:45 PM #12
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    PaulP38a
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    Hi Frank. Just curious, when the lights flash and it beeps does the message centre say something like "select transfer neutral"?
    I've had mine do this when it thinks it is moving or not in neutral. A bit of playing around with the gearstick usually fixes the position sensor.
    I know I've got to get up underneath mine one day and adjust the transmission lever, but your problem does sound a bit like this.
    Cheers, Paul.
    My toys, projects and write-ups at PaulP38a.com
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  3. 10th April 2011, 11:09 PM #13
    redandy3575
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    Chuck on some supertramp in the CD player and take the long way home
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  4. 11th April 2011, 06:55 AM #14
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    Stuck in low gear

    Unfortunately out of Supertramp but its a good thought. I have found the transmission ECU ERR 5881 but i don't know how to test it. Purchased one on line from England will install when it arrives. Going to pull the electric motor off today and see what it is like i can at least test it.
    Figured i may as well get the ECU as if mine is ok i will have a spare. Plan on getting all electrical bits for spare just incase.
    Thanks to all for the advice can anyone recommend a good supplier of parts like the ECU's and the change motor.

    Frank
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  5. 11th April 2011, 10:40 AM #15
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    Gippslander
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    Took the back off the ECU and yes it is fried, removed the change motor and it tested ok found i could manually change from low to high with the shift mechanism as explained in an earlier post from roversmith. 3/4 turn to the right from low puts it in high. Also noted that you can hot wire motor if it is still ok by taking the computer lead off and hot wire the bottom two terminals by changing polarity the motor turns backward and forward. thanks again for the help

    Frank
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  6. 11th April 2011, 01:58 PM #16
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    Quote Originally Posted by Gippslander View Post
    Took the back off the ECU and yes it is fried, removed the change motor and it tested ok found i could manually change from low to high with the shift mechanism as explained in an earlier post from roversmith. 3/4 turn to the right from low puts it in high. Also noted that you can hot wire motor if it is still ok by taking the computer lead off and hot wire the bottom two terminals by changing polarity the motor turns backward and forward. thanks again for the help

    Frank
    An electric aerial manual raise-and-lower toggle switch (momentary DPDT centre off tooggle sw) would be a lot cheaper than an ECU to replace, should be easy to wire up temporarily.
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  7. 12th April 2011, 07:18 PM #17
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    Saw you out and about today, so your temporary fix must have worked
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  8. 13th April 2011, 02:19 PM #18
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    That must have been Monday i thought i saw you up the street. Yes it worked but had to go back to work so i am sitting offshore Malaysia thinking about next trip home and up the bush. Will have to catch up soon.
    Frank
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