NAVIGATION SYSTEM Switch Lights of Remote Touch Always Illuminate or cannot be Controlled Using Rheostat

DESCRIPTION

Power is supplied to the remote touch illumination when the light control switch is in the tail or head position.

Tech Tips


  • When the remote touch is in self check mode, the switch illumination on the remote touch may remain on.

  • If any illumination controlled by the rheostat switch has a malfunction such as an open circuit, the switch illumination of the remote touch is affected and cannot be controlled by the rheostat switch.

WIRING DIAGRAM

A0020R4E02

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK ILLUMINATION CONTROLLED BY RHEOSTAT SWITCH


    1. Perform the following procedure and check that the illumination controlled by the rheostat switch illuminates properly.


      1. If the vehicle is in a bright area, move it to a dark area.

        Tech Tips

        When the vehicle is in a bright area, the switch illumination may not turn on due to the auto dimmer function.

      2. If the light control switch is in the AUTO position, turn the switch to the tail or head position.

        Tech Tips

        If the light control switch is in the AUTO position, the switch illumination will not turn on unless the surrounding area is dark.

        Result
        Result Proceed to
        Any of the illumination controlled by the rheostat switch does not illuminate properly. A
        All of the illumination controlled by the rheostat switch illuminates properly. B

        Tech Tips

        The shift lever illumination and panel switch illumination are controlled by the rheostat switch. If either of these has a malfunction such as an open circuit, the switch illumination of the remote touch is affected and cannot be controlled by the rheostat switch.


    B

    CONFIRM SYMPTOMS Click here

    A

  2. REPAIR OR REPLACE ILLUMINATION CONTROLLED BY RHEOSTAT SWITCH


    1. Repair or replace the part with the malfunctioning illumination that is controlled by the rheostat switch.

      Result
      Proceed to
      NEXT

    NEXT

  3. CONFIRM SYMPTOMS


    1. A00213KC04
      *a Switch Illumination

      Perform the following procedure, operate the rheostat switch again, and check if illumination brightness adjustment is possible (including adjustment of other devices such as the radio receiver assembly).


      1. Check if the remote touch is in self check mode. If it is, cancel self check mode.

        Click here

        Tech Tips

        When the remote touch is in self check mode, the switch illumination on the remote touch may remain on.

      2. If the vehicle is in a bright area, move it to a dark area.

        Tech Tips

        When the vehicle is in a bright area, the switch illumination may not turn on due to the auto dimmer function.

      3. If the light control switch is in the AUTO position, turn the switch to the tail or head position.

        Tech Tips

        If the light control switch is in the AUTO position, the switch illumination will not turn on unless the surrounding area is dark.

        Result
        Result Proceed to
        Switch illumination cannot be adjusted (illumination for other devices can be adjusted). A
        Switch illumination cannot be adjusted (illumination for other devices also cannot be adjusted). B
        Switch illumination can be adjusted. C

    B

    GO TO METER / GAUGE SYSTEM Click here

    C

    END

    A

  4. REMOTE TOUCH SELF CHECK (SWITCH ILLUMINATION CHECK)


    1. Activate self check mode.

      Click here

    2. A00213KC05
      *a Switch Illumination
      *b Switch Knob

      Check the switch illumination.


      1. Move the remote touch switch knob from the lower left to the upper right to check that the brightness of the switch illumination changes.

        OK
        The brightness of the switch illumination changes according to remote touch switch knob operation.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REMOTE OPERATION BOARD Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the K78 remote touch (remote operation board) connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      K78-9 (ILL+) - Body ground

      Power switch off

      Light control switch in tail or head position

      		 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (REMOTE TOUCH (REMOTE OPERATION BOARD) - COMBINATION METER ASSEMBLY)


    1. Disconnect the K78 remote touch (remote operation board) connector.

    2. Disconnect the K3 combination meter assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K78-16 (ILL-) - K3-39 (ILL-) Always Below 1 Ω
      K78-16 (ILL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REMOTE OPERATION BOARD Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR