Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001CW4E
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 01/2019]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for Gasoline Model): Electric Parking Brake System AUTO Function Circuit; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]

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
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)
  • The electric parking brake may still operate up to 20 seconds after the engine switch is turned off. Before disconnecting connectors or fuses, turn the engine switch off and wait 20 seconds or more.
  • Inspect the fuses for circuits related to this system before performing the following procedure. (for M/T)
  • After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.

    Click here 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): UTILITY

  • When replacing the skid control ECU (brake actuator assembly), operate the electric parking brake switch (electric parking brake switch assembly) as the parking brake indicator light blinks (red) when the engine switch is first turned on (IG).

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) 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))
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