Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HBL6
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 09/2022]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C052C11,...,C142719; ABS Pump Motor Control Circuit Short to Ground; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]

DTC

C052C11

ABS Pump Motor Control Circuit Short to Ground

DTC

C052C13

ABS Pump Motor Control Circuit Open

DTC

C052F14

ABS Pump Motor Supply Voltage Circuit Short to Ground or Open

DTC

C142719

ABS Pump Motor Circuit Current Above Threshold

DESCRIPTION

The ABS motor relay is built into the brake actuator assembly.

When the skid control ECU (brake actuator assembly) operates ABS, TRAC, VSC, brake hold or brake assist, the ABS motor relay turns ON and drives the motor pump built into the brake actuator assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C052C11

ABS Pump Motor Control Circuit Short to Ground

When the voltage at terminal +BM is between 9.6 and 16.4 V, a short to ground in the ABS motor drive circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C052C13

ABS Pump Motor Control Circuit Open

An open in the ABS motor drive circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C052F14

ABS Pump Motor Supply Voltage Circuit Short to Ground or Open

  • When the pump motor is turned off after operating, 0.6 V or more is detected at the pump motor for 0.48 seconds or more.
  • The power supply of the ABS motor relay is less than 5 V for 0.15 seconds or more.

Skid control ECU (brake actuator assembly)

C142719

ABS Pump Motor Circuit Current Above Threshold

  • When the ABS motor relay is operating, an overload in the ABS motor relay is detected for 0.06 seconds or more.
  • When the ABS motor relay is operating, a short in the pump motor drive circuit is detected for 0.06 seconds or more.

Skid control ECU (brake actuator assembly)

DTC Detection Conditions: C052F14

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

The pump motor is turned off after operating.

-

Malfunction Status

0.6 V or more is detected at the pump motor.

-

The power supply of the ABS motor relay is less than 5 V.

-

Detection Time

0.48 seconds or more.

0.15 seconds or more.

Number of Trips

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C142719

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

The ABS motor relay is operating.

Malfunction Status

An overload in the ABS motor relay is detected.

-

A short in the pump motor drive circuit is detected.

-

Detection Time

0.06 seconds or more.

0.06 seconds or more.

Number of Trips

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

CAUTION / NOTICE / HINT

NOTICE:

  • 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

  • Before performing troubleshooting, make sure to confirm that the battery voltage is normal.

    Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

  • The system may store DTC C052F14 due to a drop in battery voltage. If a DTC regarding low system supply power voltage is output at the same time, perform troubleshooting for that DTC first.
  • If the vehicle has stored DTC C052F14 due a drop in battery voltage, it can be cleared by driving the vehicle at a speed of 15 km/h (9 mph) or more for 0.48 seconds or more and then clearing the DTCs using the GTS.

PROCEDURE

1.

REPLACE BRAKE ACTUATOR ASSEMBLY

(a) Replace the skid control ECU (brake actuator assembly).

Click here 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

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