Toyota Yaris: Active Torque Split Awd System / AWD Warning Light does not Come ON

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Drivetrain / Gf1a (transfer / 4wd / Awd) / Active Torque Split Awd System / AWD Warning Light does not Come ON

DESCRIPTION

Refer to "AWD Warning Light Remains ON".

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WIRING DIAGRAM

Refer to "AWD Warning Light Remains ON".

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CAUTION / NOTICE / HINT

Refer to "AWD Warning Light Remains ON".

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PROCEDURE

1.

CHECK HARNESS AND CONNECTOR

(a) Check that there is no looseness at the locking and connecting parts of the AWD ECU assembly connector.

OK:

No looseness at the locking and connecting parts

(b) Disconnect the O119 and O120 AWD ECU assembly connectors.

(c) Check the connector case and the terminal for deformation and corrosion.

OK:

No deformation or corrosion

(d) Connect the O119 and O120 AWD ECU assembly connectors.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK AWD WARNING MESSAGE

(a) According to the display on the GTS, perform the Active Test and check the Data List "AWD Warning Light" turns ON/OFF.

Chassis > Four Wheel Drive > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

4WD Warning Light

AWD warning (multi-information display)

OFF / ON

OFF: Warning off

ON: Warning on

-

Chassis > Four Wheel Drive > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

4WD Warning Light

AWD warning (multi-information display)

Warning ON/OFF

Observe combination meter assembly

Chassis > Four Wheel Drive > Active Test

Active Test Display

4WD Warning Light

Data List Display

4WD Warning Light

Result

Proceed to

Data List display does not switch ON/OFF

A

Data List display switches ON/OFF

B

A

REPLACE AWD ECU ASSEMBLY

B

GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    AWD Warning Light Remains ON

    DESCRIPTION The AWD ECU assembly is connected to the combination meter assembly via the CAN communication system. If the AWD ECU assembly stores any DTCs which are related to the active torque split AWD system, the warning message is displayed on the multi-information display in the combination meter assembly...

    AWD Control Switch Circuit

    DESCRIPTION Operate the AWD control switch (No. 2 combination switch assembly) and check that the Data List display and the messages in the multi-information display change according to the switch operation...

    Other information:

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