Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000ZL6R
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: LIGHTING (INT): LIGHTING SYSTEM: Interior Light Circuit; 2017 - 2020 MY Sienna [08/2016 -        ]

Interior Light Circuit

DESCRIPTION

The illuminated entry system controls the No. 2 room light assembly*1, spot light assembly*2 and roof console box assembly.

  • *1: w/o Rear Sliding Roof
  • *2: w/ Rear Sliding Roof

WIRING DIAGRAM

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Main Body

Tester Display

Test Part

Control Range

Diagnostic Note

Illuminated Entry System

No. 2 room light assembly*1, spot light assembly*2 and roof console box assembly

ON/OFF

Interior light switch is in the DOOR position and all doors are closed.
  • *1: w/o Rear Sliding Roof
  • *2: w/ Rear Sliding Roof

OK:

Each light fades in.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)

(a) Disconnect the main body ECU connector.

*a

Front view of wire harness connector

(to Main Body ECU)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

D12-2 (DOMR) - Body ground

Always

11 to 14 V

(c) Reconnect the main body ECU connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK)

(a) Disconnect the instrument panel junction block assembly connector.

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

2D-12 - Body ground

Always

11 to 14 V

(c) Reconnect the instrument panel junction block assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.

Click here 2016 - 2020 MY Sienna [12/2015 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

2D-12 - 2I-1 (ILE)

Always

Below 1 Ω

2I-1 (ILE) - Body ground

Always

10 kΩ or higher

(c) Reinstall the instrument panel junction block assembly.

Click here 2016 - 2020 MY Sienna [12/2015 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: INSTALLATION

OK

REPLACE MULTIPLEX NETWORK BODY ECU

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY