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.

    Click here 2018 - 2020 MY Sienna [11/2017 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: PRECAUTION

  • 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.

PROCEDURE

1.

CHECK VEHICLE SIGNAL (OPERATION CHECK)

(a) Enter the "Vehicle Signal Check Mode" screen. [Refer to Check Vehicle Signal in Operation Check (See page 2018 - 2020 MY Sienna [11/2017 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: OPERATION CHECK )]

(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

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2018 MY Sienna [11/2017 - 08/2018]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: PROBLEM SYMPTOMS TABLE 2019 - 2020 MY Sienna [08/2018 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: PROBLEM SYMPTOMS TABLE )