BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C12BB12,...,C12C649; Right Front Wheel ABS Hold Solenoid Control Circuit Short to Battery; 2024 - 2025 MY Corolla Corolla Hatchback GR Corolla [08/2023

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000002D0FQ
Model Year Start: 2024	Model: GR Corolla	Prod Date Range: [08/2023 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C12BB12,...,C12C649; Right Front Wheel ABS Hold Solenoid Control Circuit Short to Battery; 2024 - 2025 MY Corolla Corolla Hatchback GR Corolla [08/2023 - ]

DTC

C12BB12

Right Front Wheel ABS Hold Solenoid Control Circuit Short to Battery

DTC

C12BB14

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

DTC

C12BB1C

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

DTC

C12BB1E

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

DTC

C12BB49

Right Front Wheel ABS Hold Solenoid Control Internal Electronic Failure

DTC

C12C612

Right Front Wheel ABS Release Solenoid Control Circuit Short to Battery

DTC

C12C614

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

DTC

C12C61C

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

DTC

C12C61E

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

DTC

C12C649

Right 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 RH controls the brake fluid pressure of the front wheel cylinder RH 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	MIL	Note
C12BB12	Right 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)	Does not come on	-
C12BB14	Right 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)	Does not come on	-
C12BB1C	Right 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)	Does not come on	-
C12BB1E	Right 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)	Does not come on	-
C12BB49	Right 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)	Does not come on	-
C12C612	Right 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)	Does not come on	-
C12C614	Right 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)	Does not come on	-
C12C61C	Right 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)	Does not come on	-
C12C61E	Right 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)	Does not come on	-
C12C649	Right 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)	Does not come on	-

PROCEDURE

1.	REPLACE BRAKE ACTUATOR ASSEMBLY

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

Click here

END