Toyota Yaris: Active Torque Split Awd System / AWD Control Switch Circuit

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Drivetrain / Gf1a (transfer / 4wd / Awd) / Active Torque Split Awd System / 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.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the ECM, refer to Registration.

Click here

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Using the GTS, check for DTCs.

Click here

(b) Check that DTCs indicating a CAN communication system malfunction are not output.

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

INSPECT CAN COMMUNICATION SYSTEM

A

2.

READ VALUE USING GTS (DRIVE MODE STATUS)

(a) According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Drive Mode Status

Drive Mode Status

Normal / Power / Sport / Sport / Sport+ / Comfort / ECO / Track

-

-

Powertrain > Engine > Data List

Tester Display

Drive Mode Status

(b) 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.

OK:

AWD Control Switch (No. 2 Combination Switch Assembly) Operation

Data List Display

Multi-information Display Message

PUSH NORMAL

Normal

NORMAL

SPORT

Sport

SPORT

TRACK

Track

TRACK

Result

Proceed to

When the switch is operated, the Data List display and message do not change

A

When the switch is operated, the Data List display changes, but the message does not change

B

When the switch is operated, the Data List display and indicator change normally

C

B

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

C

CHECK INTERMITTENT PROBLEMS

A

3.

INSPECT NO. 2 COMBINATION SWITCH ASSEMBLY

Click here

NG

REPLACE NO. 2 COMBINATION SWITCH ASSEMBLY

OK

4.

CHECK HARNESS AND CONNECTOR (ECM - NO. 2 COMBINATION SWITCH ASSEMBLY)

(a) Turn the ignition switch off.

(b) Disconnect the A106 ECM connector.

(c) Disconnect the H142 AWD control switch (No. 2 combination switch assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A106-24 (TRMS) - H142-6 (B)

Always

Below 1 Ω

A106-31 (PWMS) - H142-4 (2ND)

Always

Below 1 Ω

A106-51 (SPCN) - H142-5 (B)

Always

Below 1 Ω

H142-3 (GND) - Body ground

Always

Below 1 Ω

A106-24 (TRMS) or H142-6 (B) - Body ground

Always

10 kΩ or higher

A106-31 (PWMS) or H142-4 (2ND) - Body ground

Always

10 kΩ or higher

A106-24 (TRMS) or H142-6 (B) - A106-31 (PWMS) or H142-4 (2ND)

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    AWD Warning Light does not Come ON

    DESCRIPTION Refer to "AWD Warning Light Remains ON". Click here WIRING DIAGRAM Refer to "AWD Warning Light Remains ON". Click here CAUTION / NOTICE / HINT Refer to "AWD Warning Light Remains ON"...

    Transfer Assembly

    ..

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    Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.

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