Switch Lights of Remote Touch Always Illuminate or cannot be Controlled Using Rheostat [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 (remote operation controller assembly) 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 (remote operation controller assembly) is in self check mode. If it is, cancel self check mode.

      Refer to OPERATION CHECK [08/2019 - ]

      HINT: 

      When the remote touch (remote operation controller assembly) is in self check mode, the switch illumination on the remote touch (remote operation controller assembly) 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. Enter self-diagnostic mode.

   Refer to OPERATION CHECK [08/2019 - ]

2. Operate the remote touch screen diagonally from the upper left to the lower right and check that the brightness of the switch illumination changes.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Switch Illumination
   *b	Remote Touch Screen

   NOTE:

   Since the remote touch screen may recognize a pinch in/out or flick operation if operated with 2 fingers, always use 1 finger to operate the remote touch screen in self-diagnostic mode.

   OK

   Brightness changes according to remote touch screen operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY). Refer to  REMOVAL [08/2019 - ] 

Result: 

OK 

See step  5

1. Disconnect the J154 remote touch (remote operation controller assembly) connector.
2. Measure the voltage according to the value (s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   J154-2 (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 J154 remote touch (remote operation controller assembly) 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
   J154-5 (ILL-) - J10-39 (ILL-)	Always	Below 1 Ω
   J154-5 (ILL-) or J10-39 (ILL-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY). Refer to  REMOVAL [08/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR