Display does not Dim when Light Control Switch is Turned ON [12/2015 - 11/2017]: Procedure

1. Turn the light control switch to the tail or head position.
2. Check that the daytime screen setting on the display adjustment screen is set to on.
   RESULT
   
   

   Result	Proceed to
   Daytime screen setting is set to on	A
   Daytime screen setting is set to off	B

Result: 

A 

CHANGE DAYTIME SCREEN SETTING TO OFF 

Result: 

B 

See step  2

1. Enter the "Vehicle Signal Check Mode" screen.

   Refer to Check Vehicle Signal in Operation Check (Refer to OPERATION CHECK [12/2015 - 11/2017] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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: 

   The display is updated once per second. It is normal for the display to lag behind the actual switch operation.

Result: 

OK 

REPLACE NAVIGATION RECEIVER ASSEMBLY 

(Refer to REMOVAL [12/2015 - 11/2017] )

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2015 - 08/2016] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 11/2017] )