Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000026K7D
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for Gasoline Model): Electric Parking Brake System AUTO Function Circuit; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

Electric Parking Brake System AUTO Function Circuit

DESCRIPTION

for M/T

  • The electric parking brake system AUTO function (IG-OFF linked function) is controlled by the skid control ECU (brake actuator assembly) based on whether it receives input voltage or not.

    When the engine switch is turned off, the electric parking brake system AUTO function (IG-OFF linked function) automatically operates to apply the electric parking brake.

for CVT

  • The skid control ECU (brake actuator assembly) receives shift position signals from the ECM via CAN communication to control the electric parking brake system AUTO function (shift-linked function).

    The electric parking brake system AUTO function (shift-linked function) is automatically disabled when the engine switch is on (IG), the brake pedal is depressed and the shift lever is moved out of P. Then, if the shift lever is moved to P, the AUTO function (shift-linked function) automatically operates to apply the electric parking brake.

WIRING DIAGRAM

for M/T (except TMC Made)
for M/T (TMC Made)
for CVT

CAUTION / NOTICE / HINT

NOTICE:

  • The AUTO function (IG-OFF linked function) will not automatically operate if the electric parking brake switch assembly is moved to the release side when the engine switch is turned off. (for M/T)
  • The AUTO function (shift-linked function) will not be automatically disabled when the engine switch is on (IG), the brake pedal is depressed and the shift lever is moved out from P if the electric parking brake switch assembly is moved to the engage side. The AUTO function (shift-linked function) will not automatically operate to apply the electric parking brake when the shift lever is moved to P if the electric parking brake switch assembly is moved to the release side. (for CVT)
  • Inspect the fuses for circuits related to this system before performing the following procedure. (for M/T)

PROCEDURE

1.

CHECK VEHICLE SPECIFICATION

(a) Check the vehicle specification.

Result

Proceed to

for M/T

A

for CVT

B
B

GO TO STEP 3

A

2.

CHECK FOR SHORT TO +B

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

(b) except TMC Made:

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A51-36 (IG1) - Body ground

Engine switch off

Below 1 V

*a

Front view of wire harness connector

(to Skid Control ECU (Brake Actuator Assembly))

(c) for TMC Made:

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A51-36 (IGR) - Body ground

Engine switch off

Below 1 V

*a

Front view of wire harness connector

(to Skid Control ECU (Brake Actuator Assembly))
OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.

CHECK DTC (SFI SYSTEM)

(a) Check for DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC is not output

A

DTC is output

B
A

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

B

GO TO SFI SYSTEM

for M20A-FKS: Click here 2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

for 2ZR-FAE: Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING