NAVIGATION SYSTEM Switch Lights of Remote Touch do not Illuminate

DESCRIPTION

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

WIRING DIAGRAM

*1	from PANEL Relay
*2	PANEL
*3	No. 1 Meter ECU Sub-assembly
*4	Remote Touch (Remote Operation Board)

CAUTION / NOTICE / HINT

PROCEDURE

1. CONFIRM SYMPTOMS

   
   
   1. 

      Text in Illustration

      *a	Switch Illumination

      Perform the following procedure and check the switch illumination again.

      
      

      1. When 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 automatic dimmer function.

      2. Set the rheostat to the maximum brightness.

         Tech Tips

         If the brightness of the rheostat is set to low, switch illumination may not be recognized even when the switch illumination turns on.

      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.

         OK
         Switch illumination turns on.

   
   

   OK

   END

   NG

2. REMOTE TOUCH SELF CHECK (SWITCH ILLUMINATION CHECK)

   
   

   1. Activate self check mode Click here.

   2. 

      Text in Illustration

      *a	Switch Illumination
      *b	Switch Knob

      Check 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 switch illumination brightness changes according to the remote touch switch knob operation.

   
   

   NG

   REPLACE REMOTE TOUCH (REMOTE OPERATION SWITCH) Click here

   OK

3. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to Remote Touch [Remote Operation Board])

      Disconnect the remote touch (remote operation board) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition L152-9 (ILL+) - Body ground Light control switch in tail or head position 11 to 14 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (REMOTE TOUCH [REMOTE OPERATION BOARD] - NO. 1 METER ECU SUB-ASSEMBLY)

   
   

   1. Disconnect the L152 remote touch (remote operation board) connector.

   2. Disconnect the L10 No. 1 meter ECU sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition L152-16 (ILL-) - L10-16 (ILL-) Always Below 1 Ω L152-16 (ILL-) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. REPLACE REMOTE TOUCH (REMOTE OPERATION BOARD)

   
   

   1. Replace the remote touch (remote operation board) with a new or known good one Click here.

   2. Check if the switch illumination turns on.

      OK
      The switch illumination turns on when the light control switch is in the tail or head position.

   
   

   OK

   END (REMOTE TOUCH [REMOTE OPERATION BOARD] IS DEFECTIVE)

   NG

   GO TO METER / GAUGE SYSTEM Click here

6. REPLACE REMOTE TOUCH (REMOTE OPERATION SWITCH)

   
   

   1. Replace the remote touch (remote operation switch) with a new or known good one Click here.

   2. Check if the switch illumination turns on.

      OK
      The switch illumination turns on when the light control switch is in the tail or head position.

   
   

   OK

   END (REMOTE TOUCH [REMOTE OPERATION SWITCH] IS DEFECTIVE)

   NG

   REPLACE REMOTE TOUCH (REMOTE OPERATION BOARD) Click here