Display does not Dim when Light Control Switch is Turned ON

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

CHECK IMAGE QUALITY SETTING
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 DAY MODE On Screen
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO TO STEP 2

OK: TURN "DAY MODE" SETTING OFF

CHECK VEHICLE SIGNAL (DISPLAY CHECK MODE)

Enter the "Display Check" mode (Vehicle Signal Check) (See DISPLAY CHECK MODE ).

Check that the display changes between DIM and BRIGHT according to the light control switch operation.

LIGHT CONTROL SWITCH DISPLAY

Light Control Switch	Display
TAIL or HEAD	DIM
OFF	BRIGHT

Fig 2: Checking Vehicle Signal (Display Check Mode)

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

Ok: REPLACE MULTI-DISPLAY