NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Display does not Dim when Light Control Switch is Turned ON; 2018 - 2020 MY Sienna [11/2017

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000001900A
Model Year Start: 2018	Model: Sienna	Prod Date Range: [11/2017 - ]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Display does not Dim when Light Control Switch is Turned ON; 2018 - 2020 MY Sienna [11/2017 - ]

Display does not Dim when Light Control Switch is Turned ON

CAUTION / NOTICE / HINT

NOTICE:

When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:

A communication malfunction DTC is stored.
The radio and display receiver assembly may not operate normally.

PROCEDURE

1.	CHECK IMAGE QUALITY SETTING

(a) Display the "Display" screen.

(b) Turn the headlight dimmer switch assembly 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 headlight dimmer switch assembly operation.

HINT:

The display is updated once per second. It is normal for the display to lag behind the actual switch operation.
Make sure to move the vehicle to a bright area before performing an operation check with the light control switch in the AUTO position.

OK:

Headlight Dimmer Switch Assembly	Display
Tail or head	ON
Off	OFF

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page )