BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C13C012,...,C13C949; Brake Pressure Control Solenoid "A" Control Circuit Short to Battery; 2023 - 2025 MY Corolla Corolla HV [09/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000025DUM
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C13C012,...,C13C949; Brake Pressure Control Solenoid "A" Control Circuit Short to Battery; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ]

DTC

C13C012

Brake Pressure Control Solenoid "A" Control Circuit Short to Battery

DTC

C13C014

Brake Pressure Control Solenoid "A" Control Circuit Short to Ground or Open

DTC

C13C01C

Brake Pressure Control Solenoid "A" Control Circuit Voltage Out of Range

DTC

C13C01E

Brake Pressure Control Solenoid "A" Control Circuit Resistance Out of Range

DTC

C13C049

Brake Pressure Control Solenoid "A" Control Internal Electronic Failure

DTC

C13C912

Brake Pressure Control Solenoid "B" Control Circuit Short to Battery

DTC

C13C914

Brake Pressure Control Solenoid "B" Control Circuit Short to Ground or Open

DTC

C13C91C

Brake Pressure Control Solenoid "B" Control Circuit Voltage Out of Range

DTC

C13C91E

Brake Pressure Control Solenoid "B" Control Circuit Resistance Out of Range

DTC

C13C949

Brake Pressure Control Solenoid "B" Control Internal Electronic Failure

DESCRIPTION

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

Depending on the operating conditions, the master cylinder cut solenoid valves regulate the brake fluid pressure generated by the pump motor.

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Note
C13C012	Brake Pressure Control Solenoid "A" Control Circuit Short to Battery	A short to +B in the master cylinder cut solenoid circuit is detected during the self-test.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13C3 Output ECU: Skid control ECU (brake actuator assembly)
C13C014	Brake Pressure Control Solenoid "A" Control Circuit Short to Ground or Open	An open or short in the master cylinder cut solenoid circuit is detected during the self-test.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13C2 Output ECU: Skid control ECU (brake actuator assembly)
C13C01C	Brake Pressure Control Solenoid "A" Control Circuit Voltage Out of Range	A current leak in the master cylinder cut solenoid circuit is detected during the self-test. The master cylinder cut solenoid valve operation request signal and master cylinder cut solenoid valve operation feedback signal do not match for a certain period of time.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13C1 (Case 1 to 4) Output ECU: Skid control ECU (brake actuator assembly)
C13C01E	Brake Pressure Control Solenoid "A" Control Circuit Resistance Out of Range	An abnormal resistance in the master cylinder cut solenoid circuit is detected during the self-test.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13C1 (Case 5) Output ECU: Skid control ECU (brake actuator assembly)
C13C049	Brake Pressure Control Solenoid "A" Control Internal Electronic Failure	An internal malfunction in the master cylinder cut solenoid circuit is detected during the self-test.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13C0 Output ECU: Skid control ECU (brake actuator assembly)
C13C912	Brake Pressure Control Solenoid "B" Control Circuit Short to Battery	A short to +B in the master cylinder cut solenoid circuit is detected during the self-test.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13CC Output ECU: Skid control ECU (brake actuator assembly)
C13C914	Brake Pressure Control Solenoid "B" Control Circuit Short to Ground or Open	An open or short in the master cylinder cut solenoid circuit is detected during the self-test.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13CB Output ECU: Skid control ECU (brake actuator assembly)
C13C91C	Brake Pressure Control Solenoid "B" Control Circuit Voltage Out of Range	A current leak in the master cylinder cut solenoid circuit is detected during the self-test. The master cylinder cut solenoid valve operation request signal and master cylinder cut solenoid valve operation feedback signal do not match for a certain period of time.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13CA (Case 1 to 4) Output ECU: Skid control ECU (brake actuator assembly)
C13C91E	Brake Pressure Control Solenoid "B" Control Circuit Resistance Out of Range	An abnormal resistance in the master cylinder cut solenoid circuit is detected during the self-test.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13CA (Case 5) Output ECU: Skid control ECU (brake actuator assembly)
C13C949	Brake Pressure Control Solenoid "B" Control Internal Electronic Failure	An internal malfunction in the master cylinder cut solenoid circuit is detected during the self-test.	Skid control ECU (brake actuator assembly)	Comes on	Brake/EPB	SAE Code: C13C9 Output ECU: Skid control ECU (brake actuator assembly)

MONITOR DESCRIPTION

C13C0 and C13C9:

When the self-diagnosis function detects a master cylinder cut solenoid internal malfunction when the master cylinder cut solenoid is not operating, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

C13C1 (Case 1) and C13CA (Case 1):

When it is detected by the self-diagnosis function that the feedback value from the master cylinder cut solenoid drive circuit does not match the operation request value, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

C13C1 (Case 2) and C13CA (Case 2):

When the downstream voltage of the master cylinder cut solenoid or the current flowing in the master cylinder cut solenoid is less than a certain value, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

C13C1 (Case 3) and C13CA (Case 3):

When the master cylinder cut solenoid is not operating and the current flowing in the master cylinder cut solenoid exceeds a certain value (current leak is detected), the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

C13C1 (Case 4) and C13CA (Case 4):

If the current flowing in the master cylinder cut solenoid circuit, circuit temperature, or voltage drop within the circuit is a certain value or more, the skid control ECU (brake actuator assembly) judges that there is a master cylinder cut solenoid overcurrent malfunction and illuminates the MIL and stores this DTC.

C13C1 (Case 5) and C13CA (Case 5):

If the master cylinder cut solenoid is not operating and the resistance value of the master cylinder cut solenoid is outside of a certain range, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

C13C2 and C13CB:

If the current, voltage or temperature of the master cylinder cut solenoid circuit is less than or exceeds a certain value, or the operation request value and feedback value deviate by a certain value or more, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

C13C3 and C13CC:

When it is detected by the self-diagnosis function that there is a short to +B in the master cylinder cut solenoid circuit, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs	C13C0: Cyclic valve test for SM1 (built in self-test) C13C1 (Case 1): Valve feedback monitoring for SM1 (PWM check) C13C1 (Case 2): Valve feedback monitoring for SM1 (valve-coil path interruption) C13C1 (Case 3): Cyclic valve test (current leakage test) for SM1 C13C1 (Case 4): Valve feedback monitoring for SM1 (general application specific integrated circuit valve driver failure) C13C1 (Case 5): Cyclic valve test (valve resistance check) for SM1 C13C2: Cyclic valve test (silent valve driver test) for SM1 C13C3: Cyclic valve test (valve actuation register test) for SM1 C13C9: Cyclic valve test for SM2 (built in self-test) C13CA (Case 1): Valve feedback monitoring for SM2 (PWM check) C13CA (Case 2): Valve feedback monitoring for SM2 (valve-coil path interruption) C13CA (Case 3): Cyclic valve test (current leakage test) for SM2 C13CA (Case 4): Valve feedback monitoring for SM2 (general application specific integrated circuit valve driver failure) C13CA (Case 5): Cyclic valve test (valve resistance check) for SM2 C13CB: Cyclic valve test (silent valve driver test) for SM2 C13CC: Cyclic valve test (valve actuation register test) for SM2
Required Sensors/Components(Main)	Skid control ECU (brake actuator assembly)
Required Sensors/Components(Related)	Skid control ECU (brake actuator assembly)
Frequency of Operation	During initial checking
Duration	-: C13C0, C13C1 (Case 3 and 5), C13C2, C13C3, C13C9, C13CA (Case 3 and 5), C13CB and C13CC 0.03 seconds: C13C1 (Case 1, 2 and 4), C13CA (Case 1, 2 and 4)
MIL Operation	Immediately
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

TMC's intellectual property

CONFIRMATION DRIVING PATTERN

NOTICE:

When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off.
Turn the ignition switch to ON (READY) and turn the GTS on.
Wait for 1 second or more. [*]
HINT:

[*]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Chassis / Brake/EPB* / Utility / All Readiness.
*: Electric Parking Brake System
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

PROCEDURE

1.	REPLACE BRAKE ACTUATOR ASSEMBLY

Click here

END