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Display does not Dim when Light Control Switch is Turned ON: Procedure

  1. CHECK IMAGE QUALITY SETTING 
    1. Enter the display adjustment screen by pressing the "DISP" switch.
      Fig 1: Display Adjustment - Screen Display
      GTY263353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the light control switch to the TAIL position.
    3. Check if "Day Mode" on the display adjustment is on.

      OK

      "Day Mode" is on.

      TEXT IN ILLUSTRATION

      *a Example:

    NG → See step   2 

    OK → TURN "Day Mode" SETTING OFF 

  2. CHECK VEHICLE SIGNAL (OPERATION CHECK) 
    1. Enter the "Vehicle Signal Check Mode" screen. Refer to Check Vehicle Signal in Operation Check. Refer to OPERATION CHECK .
      Fig 2: Vehicle Signal Check Mode - Screen Display
      GTY190961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Cover the automatic light control sensor on the instrument panel with a cloth.
    3. Set the instrument panel light control to less than the maximum (to activate the dimmer function that works when the light control switch is in the TAIL position).
    4. Check that the display changes between ON and OFF according to the light control switch operation.

      OK

      Light Control Switch Condition Display Condition
      TAIL or HEAD ON
      OFF OFF

      HINT: 

      The display is updated once per second. It is normal for the display to lag behind the actual switch operation.

    NG → See step   3 

    OK → See step   4 

  3. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  4. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to  REMOVAL