Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000261GQ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model): Drive Mode Select Switch Circuit; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]

Drive Mode Select Switch Circuit

DESCRIPTION

The characteristics of the electronic throttle and EPS operation change according to operation of the combination switch assembly (drivem ode select switch).

WIRING DIAGRAM

PROCEDURE

1.

INSPECT COMBINATION SWITCH ASSEMBLY (DRIVE MODE SELECT SWITCH)

(a) Remove the combination switch assembly (drive mode select switch).

Click here 2023 - 2025 MY GR Corolla [09/2022 -        ]; POWER ASSIST SYSTEMS: PATTERN SELECT SWITCH (for G16E-GTS): REMOVAL

*a

Component without harness connected

(Combination Switch Assembly (Drive Mode Select Switch))

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

7 (SEL) - 5 (E)

Drive mode select switch pushed forward

Below 50 Ω

7 (SEL) - 5 (E)

Drive mode select switch in neutral position

10 kΩ or higher

6 (E) - 5 (E)

Drive mode select switch pulled rearward

Below 50 Ω

6 (E) - 5 (E)

Drive mode select switch in neutral position

10 kΩ or higher

(c) Install the combination switch assembly (drive mode select switch).

Click here 2023 - 2025 MY GR Corolla [09/2022 -        ]; POWER ASSIST SYSTEMS: PATTERN SELECT SWITCH (for G16E-GTS): INSTALLATION

NG

REPLACE COMBINATION SWITCH ASSEMBLY (DRIVE MODE SELECT SWITCH)

OK

2.

CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND)

(a) Disconnect the I177 combination switch assembly (drive mode select switch) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I177-5 (E) - Body ground

Always

Below 1 Ω

(c) Connect the I177 combination switch assembly (drive mode select switch) connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND)

OK

3.

CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - ECM)

(a) Disconnect the A139 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A139-31 (DMS+) - Body ground

Drive mode select switch pushed forward

Below 50 Ω

A139-31 (DMS+) - Body ground

Drive mode select switch in neutral position

10 kΩ or higher

A139-51 (DMS-) - Body ground

Drive mode select switch pulled rearward

Below 50 Ω

A139-51 (DMS-) - Body ground

Drive mode select switch in neutral position

10 kΩ or higher

(c) Connect the A139 ECM connector.

OK

PROCEED TO NEXT SUSPECTED AREA

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION SWITCH ASSEMBLY - ECM)