Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM10000000265T4
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 without Electric Parking Brake System TMMMS Made): C12A512,...,C12B049; Left Front Wheel ABS Hold Solenoid Control Circuit Short to Battery; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

DTC

C12A512

Left Front Wheel ABS Hold Solenoid Control Circuit Short to Battery

DTC

C12A514

Left Front Wheel ABS Hold Solenoid Control Circuit Short to Ground or Open

DTC

C12A51C

Left Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range

DTC

C12A51E

Left Front Wheel ABS Hold Solenoid Control Circuit Resistance Out of Range

DTC

C12A549

Left Front Wheel ABS Hold Solenoid Control Internal Electronic Failure

DTC

C12B012

Left Front Wheel ABS Release Solenoid Control Circuit Short to Battery

DTC

C12B014

Left Front Wheel ABS Release Solenoid Control Circuit Short to Ground or Open

DTC

C12B01C

Left Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range

DTC

C12B01E

Left Front Wheel ABS Release Solenoid Control Circuit Resistance Out of Range

DTC

C12B049

Left Front Wheel ABS Release Solenoid Control Internal Electronic Failure

DESCRIPTION

The ABS solenoid relay and solenoid valves are built into the brake actuator assembly.

The front solenoid valve LH controls the brake fluid pressure of the front wheel cylinder LH of the vehicle.

When this DTC is stored, the fail-safe function operates and the ABS solenoid relay is turned off to prevent the solenoid valves from operating.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C12A512

Left Front Wheel ABS Hold Solenoid Control Circuit Short to Battery

A short to +B in the solenoid circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C12A514

Left Front Wheel ABS Hold Solenoid Control Circuit Short to Ground or Open

An open or short in the solenoid circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C12A51C

Left Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range
  • A current leak in the solenoid circuit is detected during the self test.
  • The solenoid operation request signal and solenoid operation feedback signal do not match for a certain period of time.

Skid control ECU (brake actuator assembly)

C12A51E

Left Front Wheel ABS Hold Solenoid Control Circuit Resistance Out of Range

An abnormal resistance in the solenoid circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C12A549

Left Front Wheel ABS Hold Solenoid Control Internal Electronic Failure

An internal malfunction in the solenoid circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C12B012

Left Front Wheel ABS Release Solenoid Control Circuit Short to Battery

A short to +B in the solenoid circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C12B014

Left Front Wheel ABS Release Solenoid Control Circuit Short to Ground or Open

An open or short in the solenoid circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C12B01C

Left Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range
  • A current leak in the solenoid circuit is detected during the self test.
  • The solenoid operation request signal and solenoid operation feedback signal do not match for a certain period of time.

Skid control ECU (brake actuator assembly)

C12B01E

Left Front Wheel ABS Release Solenoid Control Circuit Resistance Out of Range

An abnormal resistance in the solenoid circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C12B049

Left Front Wheel ABS Release Solenoid Control Internal Electronic Failure

An internal malfunction in the solenoid circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

DTC Detection Conditions: C12A514

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

-

-

-

Malfunction Status

An open in the solenoid circuit is detected during the self test.

○

-

A short in the solenoid circuit is detected during the self test.

-

○

Detection Time

-

-

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: C12A51C

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

-

-

-

Malfunction Status

A current leak in the solenoid circuit is detected during the self test.

○

-

The solenoid operation request signal and solenoid operation feedback signal do not match for a certain period of time.

-

○

Detection Time

-

-

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: C12B014

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

-

-

-

Malfunction Status

An open in the solenoid circuit is detected during the self test.

○

-

A short in the solenoid circuit is detected during the self test.

-

○

Detection Time

-

-

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: C12B01C

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

-

-

-

Malfunction Status

A current leak in the solenoid circuit is detected during the self test.

○

-

The solenoid operation request signal and solenoid operation feedback signal do not match for a certain period of time.

-

○

Detection Time

-

-

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 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMMMS Made): UTILITY

PROCEDURE

1.

REPLACE BRAKE ACTUATOR ASSEMBLY

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

Click here 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (for Gasoline Model): REMOVAL

NEXT

END