Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000271JZ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System TMC Made): VSC OFF Switch Circuit; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

VSC OFF Switch Circuit

DESCRIPTION

The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.

Pressing the VSC OFF switch (combination switch assembly) turns off TRAC operation, and pressing and holding this switch turns off TRAC and VSC operation. If TRAC and VSC operations are turned off, "Traction Control Turned Off" will be displayed on the multi-information display and the VSC OFF indicator light will come on.

WIRING DIAGRAM

PROCEDURE

1.

READ VALUE USING GTS (TRAC/VSC OFF MODE)

(a) Connect the GTS to the DLC3.

(b) Turn the ignition switch to ON.

(c) Enter the following menus: Chassis / Brake/EPB / Data List.

Chassis > Brake > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

TRC(TRAC)/VSC OFF Mode

TRAC/VSC off mode

Normal mode (TRC(TRAC) ON/VSC ON) / TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON) / VSC expert mode (VSC expert mode MID ON) / VSC OFF mode (TRC(TRAC) OFF/VSC OFF)

Normal mode (TRC(TRAC) ON/VSC ON): Normal mode

TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON): TRAC off mode

VSC expert mode (VSC expert mode MID ON): VSC expert mode

VSC OFF mode (TRC(TRAC) OFF/VSC OFF): VSC off mode

-

Chassis > Brake > Data List

Tester Display

TRC(TRAC)/VSC OFF Mode

(d) Check the indicator light and mode condition on the GTS changes according to VSC OFF switch (combination switch assembly) operation.

Standard:

Switch Operation

Mode Condition Display

Multi-information Display ("Traction Control Turned Off")

VSC OFF Indicator Light

Not pressed

Normal mode (TRC(TRAC) ON/VSC ON)

Not displayed

Does not come on

Pressing the VSC OFF switch (combination switch assembly)

TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON)

Displayed

Does not come on

Pressing and holding the VSC OFF switch (combination switch assembly)

VSC OFF mode (TRC(TRAC) OFF/VSC OFF)

Displayed

Comes on

Result

Proceed to

Indicator light and mode condition display do not change

A

Mode condition display is normal, but indicator light does not change

B

Indicator light and mode condition display are normal

C
B

INSPECT METER / GAUGE SYSTEM

for 12.3 Inch Display: Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for 12.3 Inch Display): HOW TO PROCEED WITH TROUBLESHOOTING

except 12.3 Inch Display: Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (except 12.3 Inch Display): HOW TO PROCEED WITH TROUBLESHOOTING

C

USE SIMULATION METHOD TO CHECK

A

2.

INSPECT VSC OFF SWITCH (COMBINATION SWITCH ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

*a

Component without harness connected

(VSC OFF Switch (Combination Switch Assembly))

*b

for Sedan

*c

for Hatchback

(b) Disconnect the I61 VSC OFF switch (combination switch assembly) connector.

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

OK:

No deformation or corrosion.

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

Standard Resistance (for Sedan):

Tester Connection

Condition

Specified Condition

7 (+) - 5 (E)

Switch pushed

Below 50 Ω

7 (+) - 5 (E)

Switch not pushed

10 kΩ or higher

Standard Resistance (for Hatchback):

Tester Connection

Condition

Specified Condition

8 (+) - 5 (E)

Switch pushed

Below 50 Ω

8 (+) - 5 (E)

Switch not pushed

10 kΩ or higher
NG

REPLACE VSC OFF SWITCH (COMBINATION SWITCH ASSEMBLY)

OK

3.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - VSC OFF SWITCH (COMBINATION SWITCH ASSEMBLY))

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the I61 VSC OFF switch (combination switch assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

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

Standard Resistance (for Sedan):

Tester Connection

Condition

Specified Condition

I61-7 (+) - A51-38 (CSW)

Always

Below 1 Ω

I61-7 (+) or A51-38 (CSW) - Body ground

Always

10 kΩ or higher

I61-5 (E) - Body ground

1 minute or more after disconnecting the cable from the negative (-) battery terminal

Below 1 Ω

Standard Resistance (for Hatchback):

Tester Connection

Condition

Specified Condition

I61-8 (+) - A51-38 (CSW)

Always

Below 1 Ω

I61-8 (+) or A51-38 (CSW) - Body ground

Always

10 kΩ or higher

I61-5 (E) - Body ground

1 minute or more after disconnecting the cable from the negative (-) battery terminal

Below 1 Ω
OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR