Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000019009
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION 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:

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 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 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION 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]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PROBLEM SYMPTOMS TABLE 2019 - 2020 MY Sienna [08/2018 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PROBLEM SYMPTOMS TABLE )