Inspection Procedure

1. Enter the display adjustment screen by pressing the "DISP" switch.
2. Turn the light control switch to the TAIL position.
3. Check if "DAY MODE" on the display is ON.

   OK: "DAY MODE" is ON. 

   Fig 1: Identifying Display Adjustment Screen - Day Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2 

OK: TURN "DAY MODE" SETTING OFF 

1. Enter the "Display Check" mode (Vehicle Signal Check Mode) (see SYSTEM NORMAL CONDITION CHECK  ).
   Fig 2: Identifying Screen Display - Vehicle Signal Check Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Cover the automatic light control sensor on the instrument panel with a cloth.
3. Set the instrument panel light control to less than maximum (to activate the dimmer function that works when the light control switch is in the TAIL position).
4. Check that the display changes between DIM and BRIGHT according to the light control switch operation.

   OK 

   LIGHT CONTROL SWITCH CONDITION AND DISPLAY CONDITION REFERENCE
   
   

   Light Control Switch Condition	Display Condition
   TAIL or HEAD	DIM
   OFF	BRIGHT

   HINT:

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

NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

OK: REPLACE DISPLAY AND NAVIGATION ASSEMBLY (See  REMOVAL   )