Switch Lights of Remote Touch Always Illuminate or cannot be Controlled Using Rheostat [10/2015 - 08/2019]: Procedure

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.

      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.

Result: 

B 

See step  3

Result: 

A 

See step  2

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. 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).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Switch Illumination

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

      Refer to OPERATION CHECK [10/2015 - 12/2017] , or refer to OPERATION CHECK [12/2017 - 08/2019]

      HINT: 

      When the remote touch is in self check mode, the switch illumination of 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

Result: 

B 

GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] 

Result: 

C 

END 

Result: 

A 

See step  4

1. Activate self check mode.

   Refer to OPERATION CHECK [10/2015 - 12/2017] , or refer to OPERATION CHECK [12/2017 - 08/2019]

2. Check the switch illumination.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Switch Illumination
   *b	Switch Knob

   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

Result: 

NG 

REPLACE REMOTE OPERATION BOARD. Refer to  DISASSEMBLY [10/2015 - 12/2017]  , or refer to  DISASSEMBLY [12/2017 - 08/2019] 

Result: 

OK 

See step  5

1. Disconnect the g1 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
   g1-9 (ILL+) - Body ground	Power switch off Light control switch in tail or head position	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Disconnect the g1 remote touch (remote operation board) connector.
2. Disconnect the J10 combination meter assembly connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   g1-16 (ILL-) - J10-39 (ILL-)	Always	Below 1 Ω
   g1-16 (ILL-) or J10-39 (ILL-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE REMOTE OPERATION BOARD. Refer to  DISASSEMBLY [10/2015 - 12/2017]  , or refer to  DISASSEMBLY [12/2017 - 08/2019] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR