Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001CW4K
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 09/2022]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for Gasoline Model): C060B12; Left Electric Parking Brake Actuator Control Circuit Short to Battery; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

DTC

C060B12

Left Electric Parking Brake Actuator Control Circuit Short to Battery

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C060B12

Left Electric Parking Brake Actuator Control Circuit Short to Battery
  • Diagnosis Condition:

    Electric parking brake not operating

  • Malfunction Status:

    The ECU power supply is normal but there is a malfunction in the electric parking brake actuator LH internal circuit (short to +B).

  • Detection Time:

    Approximately 0.015 to 0.195 seconds (depending on each malfunction)
  • Parking brake actuator assembly LH
  • No. 2 parking brake wire assembly
  • Wire harness or connector
  • Skid control ECU (brake actuator assembly)

DTC stored

An electric parking brake system malfunction is displayed on the multi-information display.

WIRING DIAGRAM

Click here 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for Gasoline Model): C060B00,C060B11; Left Electric Parking Brake Actuator Control+

CAUTION / NOTICE / HINT

NOTICE:

  • 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.
  • 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 FOR SHORT TO +B

(a) Turn the engine switch off.

(b) Make sure the No. 2 parking brake wire assembly is securely installed.

(c) Disconnect the n1 parking brake actuator assembly LH connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

n1-2 (+) - n1-1 (-)

Electric parking brake not operating

Below 1 V

*a

Front view of No. 2 Parking Brake Wire Assembly

(to Parking Brake Actuator Assembly LH)
OK

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; PARKING BRAKE: ELECTRIC PARKING BRAKE ACTUATOR: REMOVAL 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; PARKING BRAKE: ELECTRIC PARKING BRAKE ACTUATOR: REMOVAL

NG

2.

CHECK FOR SHORT TO +B

(a) Disconnect the nO3 No. 2 parking brake wire assembly connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

nO3-1 - nO3-2

Electric parking brake not operating

Below 1 V

*a

Front view of wire harness connector

(to No. 2 Parking Brake Wire Assembly)
OK

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY
NG

3.

CHECK FOR SHORT TO +B

(a) Disconnect the nO3 No. 2 parking brake wire assembly connector.

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

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

*a

Front view of wire harness connector

*b

(to Skid Control ECU (Brake Actuator Assembly))

*c

(to No. 2 Parking Brake Wire Assembly)

-

-

Standard Voltage:

Tester Connection

Condition

Specified Condition

nO3-1 or A51-13 (MRL+) - Body ground

Always

Below 1 V

nO3-2 or A51-12 (MRL-) - Body ground

Always

Below 1 V
OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (for Gasoline Model): REMOVAL 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (for Gasoline Model): REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (for Gasoline Model): REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR