Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIQ7
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: MF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE CONTROL 4WD SYSTEM: AWD Warning Light does not Come ON; 2016 MY Sienna [12/2015 - 08/2016]

AWD Warning Light does not Come ON

DESCRIPTION

Refer to "AWD Warning Light Remains ON" (See page 2016 MY Sienna [12/2015 - 08/2016]; MF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE CONTROL 4WD SYSTEM: AWD Warning Light Remains ON+ ).

WIRING DIAGRAM

Refer to "AWD Warning Light Remains ON" (See page 2016 MY Sienna [12/2015 - 08/2016]; MF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE CONTROL 4WD SYSTEM: AWD Warning Light Remains ON+ ).

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT:

Check the condition of each related circuit connector before troubleshooting (See page 2016 - 2020 MY Sienna [12/2015 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication system DTCs are output.

Result

Result

Proceed to

CAN communication system DTC is not output

A

CAN communication system DTC is output

B

HINT:

When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

B

GO TO CAN COMMUNICATION SYSTEM

A

2.

INSPECT AWD WARNING

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / Four Wheel Drive / Active Test.

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

Four Wheel Drive

Tester Display

Test Part

Control Range

Diagnostic Note

4WD Warning Light

AWD warning (multi-information display) / ON or OFF

ON: Warning on

OFF: Warning off

Observe combination meter

(f) When performing the 4WD Warning Light Active Test, check 4WD Warning Light in the Data List.

Four Wheel Drive

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

4WD Warning Light

AWD warning (multi-information display) / ON or OFF

ON: Warning on

OFF: Warning off

-

Result

Result

Proceed to

Does not change between ON and OFF

A

Changes between ON and OFF

B

A

REPLACE 4WD ECU ASSEMBLY

B

GO TO METER / GAUGE SYSTEM