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2002 Toyota Tundra 4wd Lo Switch Problem

Discussion in '1st Gen Tundras (2000-2006)' started by KHand, Jan 25, 2022.

  1. Jan 25, 2022 at 5:16 AM
    #1
    KHand

    #1
    KHand [OP] New Member

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    I have replaced the 4WD ECU located on the passenger side floor kick panel. 4WD Hi works, 4WD Lo works if you hold in the switch in but the switch will not stay in? Anyone had experience with this problem/resolve?
     
    KHand, Jan 25, 2022
    #1
  2. Jan 25, 2022 at 1:54 PM
    #2
    NickB_01TRD

    #2
    NickB_01TRD You don't need less cars, just more driveway.

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    The switch is not supposed to stay pushed in for 4lo only 4hi. Put truck in 4hi then put in neutral then push 4lo. Not sure what controls the 4lo switch to make it work in that way. Could be some sort of relay not working if it's just turning back off when you let go of the button.
    Did it work before you replaced the 4wd ecu? What was the reason for replacing the 4wd ecu?
     
    NickB_01TRD, Jan 25, 2022
    #2
    shifty` likes this.
  3. Jan 25, 2022 at 5:56 PM
    #3
    shifty`

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    shifty` Waving My Dick In The Wind

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    This is likely the correct answer.

    Most people don't RTFM and fail to realize you must be in neutral for LO. If I'm wrong and you're doing this, my apologies.
     
    shifty`, Jan 25, 2022
    #3
    MachSlow, N84434 and bmf4069 like this.
  4. Jan 26, 2022 at 6:37 AM
    #4
    KHand

    #4
    KHand [OP] New Member

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    While in Neutral 4wd Lo will work until you release the 4wd Lo button? Then in will not stay in Low?
     
    KHand, Jan 26, 2022
    #4
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