Illumination for Panel Switch does not Come on with Tail Switch ON [10/2015 - 08/2019]: Procedure

1. Enter the "Vehicle Signal Check Mode" screen. Refer to Check Vehicle Signal in Operation Check.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Check that the display changes between ON and OFF according to the light control switch operation.

   OK

   Light Control Switch	Display
   Tail or head	ON
   Off	OFF

   HINT: 

   This display is updated once per second. As a result, it is normal for the display to lag behind the actual switch operation.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 03/2018]  , or refer to  REMOVAL [03/2018 - 08/2019] 

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2015 - 03/2018]  , or refer to  PROBLEM SYMPTOMS TABLE [03/2018 - 08/2019]