Switch Lights of Remote Touch do not Illuminate [10/2015 - 08/2019]: Procedure

1. Perform the following procedure and check the switch illumination again.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Switch Illumination

   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 automatic dimmer function.

   2. Set the rheostat to maximum brightness.

      HINT: 

      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.

      HINT: 

      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.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  2

1. Activate self check mode.

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

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  3

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  4

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: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Replace the remote operation board with a new or known good one.

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

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.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

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

1. Replace the remote operation switch with a new or known good one.

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

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.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

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