Toyota Corolla Cross: Left Front Wheel ABS Hold Solenoid Control Circuit Short to Battery (C12A512,...,C12B049)

Toyota Corolla Cross (2022-2025) Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System (for Gasoline Model) / Left Front Wheel ABS Hold Solenoid Control Circuit Short to Battery (C12A512,...,C12B049)

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)

PROCEDURE

1.	REPLACE BRAKE ACTUATOR ASSEMBLY

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END

SEE MORE:

Disassembly

DISASSEMBLY CAUTION / NOTICE / HINT COMPONENTS (DISASSEMBLY) Procedure Part Name Code 1 FRONT NO. 2 AXLE INBOARD JOINT BOOT CLAMP 43448G - - 2 FR

INSPECTION PROCEDURE 1. INSPECT CANISTER (CHARCOAL CANISTER ASSEMBLY) (a) Visually check the canister (charcoal canister assembly). (1) Visually check the canister (charcoal canister assembly) for cracks or damage. If cracks or damage is found, replace the canister (charcoal canister assembly).

Toyota Corolla Cross: Left Front Wheel ABS Hold Solenoid Control Circuit Short to Battery (C12A512,...,C12B049)

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Disassembly

Inspection