Toyota Tundra Service Manual: Display does not Dim when Light Control Switch is Turned ON

PROCEDURE

1.	CHECK IMAGE QUALITY SETTING

(a) Display the "Display" screen.

(b) Turn the light control switch to the tail or head position.

OK:

"Day Mode" setting is off

TURN "Day Mode" SETTING OFF

2.	CHECK VEHICLE SIGNAL (OPERATION CHECK)

(a) Enter the "Vehicle Signal Check Mode" screen. [Refer to Check Vehicle Signal in Operation Check (See page )]

(b) Check that the display for "TAIL" 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.

(c) Check that the display for "ADIM/TCAN" changes between DIM and BRIGHT according to the light control switch operation.

OK:

Light Control Switch	Display
Tail or head	DIM
Off	BRIGHT

Result

REPLACE NAVIGATION RECEIVER ASSEMBLY

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Toyota Tundra Service Manual > Steering Column Assembly(for Power Tilt And Power Telescopic Steering Column): On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. REMOVE UPPER STEERING COLUMN COVER 2. REMOVE LOWER STEERING COLUMN COVER 3. INSPECT TILT MOTOR (a) Disconnect the connector from the multiplex tilt and telescopic ECU. *a Component without harness connected (b) Connect the positive (+) battery terminal to terminal ...

Toyota Tundra Owners Manual