NAVIGATION SYSTEM (for HDD) > Switch Lights of Remote Touch Always Illuminate or cannot be Controlled Using Rheostat

for Preparation Click here


DESCRIPTION

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

HINT:
  1. When the remote touch is in self check mode, the switch illumination on the remote touch may remain on.
  2. 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


E187347E04


INSPECTION PROCEDURE

NOTICE:
Inspect the fuse for circuits related to this system before performing the following inspection procedure.

1.CHECK ILLUMINATION CONTROLLED BY RHEOSTAT SWITCH

  1. Perform the following 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.

      HINT:
      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.

      HINT:
      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

      HINT:
      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
Go to step 3
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.


NEXT


3.CONFIRM SYMPTOMS


    E181083E04

  1. Perform the following settings, 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).

      HINT:
      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.

      HINT:
      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.

      HINT:
      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

Text in Illustration 
*a
Switch Illumination


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).



    E181064E07

  1. 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.

Text in Illustration 
*a
Switch Illumination
*b
Switch Knob


NG
REPLACE REMOTE OPERATION BOARD (Click here)
OK


5.CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

  1. Disconnect the H70 remote touch connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    H70-6 (ILL+) - Body ground
    		Light control switch in the tail or head position
    		11 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.CHECK HARNESS AND CONNECTOR

  1. Disconnect the H70 remote touch connector.

  1. Disconnect the H19 combination meter assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H70-4 (ILL-) - H19-10 (ILL-)
    		Always
    		Below 1 Ω
    H70-4 (ILL-) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE REMOTE OPERATION BOARD (Click here)