AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Illumination for Panel Switch does not Come on with Tail Switch ON; 2018 - 2020 MY Sienna [11/2017

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM1000000018F84
Model Year Start: 2018	Model: Sienna	Prod Date Range: [11/2017 - ]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Illumination for Panel Switch does not Come on with Tail Switch ON; 2018 - 2020 MY Sienna [11/2017 - ]

Illumination for Panel Switch does not Come on with Tail Switch ON

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
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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 occurs:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.

1.	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:

This display is updated once per second. As a result, 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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page )