BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): C12D112,...,C12DC49; Left Rear Wheel ABS Hold Solenoid Control Circuit Short to Battery; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001HBJI
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 without Electric Parking Brake System): C12D112,...,C12DC49; Left Rear Wheel ABS Hold Solenoid Control Circuit Short to Battery; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]

DTC

C12D112

Left Rear Wheel ABS Hold Solenoid Control Circuit Short to Battery

DTC

C12D114

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

DTC

C12D11C

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

DTC

C12D11E

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

DTC

C12D149

Left Rear Wheel ABS Hold Solenoid Control Internal Electronic Failure

DTC

C12DC12

Left Rear Wheel ABS Release Solenoid Control Circuit Short to Battery

DTC

C12DC14

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

DTC

C12DC1C

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

DTC

C12DC1E

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

DTC

C12DC49

Left Rear Wheel ABS Release Solenoid Control Internal Electronic Failure

DESCRIPTION

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

The rear solenoid valve LH controls the brake fluid pressure of the rear 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
C12D112	Left Rear 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)
C12D114	Left Rear 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)
C12D11C	Left Rear 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)
C12D11E	Left Rear 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)
C12D149	Left Rear 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)
C12DC12	Left Rear 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)
C12DC14	Left Rear 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)
C12DC1C	Left Rear 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)
C12DC1E	Left Rear 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)
C12DC49	Left Rear 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: C12D114

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	-	-	-
Malfunction Status	An open in the solenoid circuit is detected during the self test.	○	-
Malfunction Status	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: C12D11C

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	-	-	-
Malfunction Status	A current leak in the solenoid circuit is detected during the self test.	○	-
Malfunction Status	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: C12DC14

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	-	-	-
Malfunction Status	An open in the solenoid circuit is detected during the self test.	○	-
Malfunction Status	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: C12DC1C

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	-	-	-
Malfunction Status	A current leak in the solenoid circuit is detected during the self test.	○	-
Malfunction Status	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

PROCEDURE

1.	REPLACE BRAKE ACTUATOR ASSEMBLY

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

Click here

END