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. 

NG: Go to step 2 

Fig 1: Diagnosis Display - Display Adjustment Screen

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: TURN "DAY MODE" SETTING OFF 

1. Enter the "Display Check" mode and select "Vehicle Signal Check Mode" (See OPERATION CHECK  ).
2. Cover the automatic light control sensor on the instrument panel with a cloth.
3. Set the instrument panel light control to less than the 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 OPERATION REFERENCE
   
   

   Light Control Switch Condition	Display Condition
   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.

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

Fig 2: Diagnosis Display - Vehicle Signal Check Mode Screen

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY  (See REMOVAL  )