BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): C059749,...,C13C91C; Brake System Control Module "A" Internal Electronic Failure; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 - ]

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM10000000260S2
Model Year Start: 2023	Model: GR Corolla	Prod Date Range: [09/2022 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): C059749,...,C13C91C; Brake System Control Module "A" Internal Electronic Failure; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 - ]

DTC

C059749

Brake System Control Module "A" Internal Electronic Failure

DTC

C12A51C

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

DTC

C12B01C

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

DTC

C12BB1C

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

DTC

C12C61C

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

DTC

C12D11C

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

DTC

C12DC1C

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

DTC

C12E71C

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

DTC

C12F21C

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

DTC

C12F662

Left Front Wheel ABS Hold Solenoid / Right Front Wheel ABS Hold Solenoid Signal Compare Failure

DTC

C12F762

Left Rear Wheel ABS Hold Solenoid / Right Rear Wheel ABS Hold Solenoid Signal Compare Failure

DTC

C13BF62

Brake Pressure Control Solenoid A/B Signal Compare Failure

DTC

C13C01C

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

DTC

C13C91C

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

DESCRIPTION

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

The solenoid valves control the brake fluid pressure at each wheel cylinder.

When these DTCs are stored, the fail-safe function operates and the solenoid relay is turned off to prevent the solenoid valves from operating.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C059749	Brake System Control Module "A" Internal Electronic Failure	When the +BS terminal voltage is from 9.5 to 17.4 V and the solenoid relay is ON, the relay contact is ON and the pump motor is in a low voltage state continuously for 0.1 seconds or more.	Skid control ECU (Brake actuator assembly)
C12A51C	Left Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range	Any of the following is detected: When the +BS terminal voltage is 17.4 V or less while holding solenoid (SFLH) outputs OFF, open circuit continues for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SFLH) outputs OFF, current is maintained for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SFLH) outputs ON, overcurrent continues for 0.1 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SFLH) outputs ON, open circuit continues for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)
C12B01C	Left Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range	Either of the following is detected: When the +BS terminal voltage is 17.4 V or less while reduction solenoid (SFLR) outputs OFF, reduction solenoid (SFLR) is ON continuously for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while reduction solenoid (SFLR) outputs ON, reduction solenoid (SFLR) is OFF continuously for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)
C12BB1C	Right Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range	Any of the following is detected: When the +BS terminal voltage is 17.4 V or less while holding solenoid (SFRH) outputs OFF, open circuit continues for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SFRH) outputs OFF, current is maintained for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SFRH) outputs ON, overcurrent continues for 0.1 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SFRH) outputs ON, open circuit continues for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)
C12C61C	Right Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range	Either of the following is detected: When the +BS terminal voltage is 17.4 V or less while reduction solenoid (SFRR) outputs OFF, reduction solenoid (SFRR) is ON continuously for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while reduction solenoid (SFRR) outputs ON, reduction solenoid (SFRR) is OFF continuously for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)
C12D11C	Left Rear Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range	Any of the following is detected: When the +BS terminal voltage is 17.4 V or less while holding solenoid (SRLH) outputs OFF, open circuit continues for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SRLH) outputs OFF, current is maintained for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SRLH) outputs ON, overcurrent continues for 0.1 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SRLH) outputs ON, open circuit continues for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)
C12DC1C	Left Rear Wheel ABS Release Solenoid Control Circuit Voltage Out of Range	Either of the following is detected: When the +BS terminal voltage is 17.4 V or less while reduction solenoid (SRLR) outputs OFF, reduction solenoid (SRLR) is ON continuously for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while reduction solenoid (SRLR) outputs ON, reduction solenoid (SRLR) is OFF continuously for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)
C12E71C	Right Rear Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range	Any of the following is detected: When the +BS terminal voltage is 17.4 V or less while holding solenoid (SRRH) outputs OFF, open circuit continues for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SRRH) outputs OFF, current is maintained for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SRRH) outputs ON, overcurrent continues for 0.1 seconds or more. When the +BS terminal voltage is 17.4 V or less while holding solenoid (SRRH) outputs ON, open circuit continues for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)
C12F21C	Right Rear Wheel ABS Release Solenoid Control Circuit Voltage Out of Range	Either of the following is detected: When the +BS terminal voltage is 17.4 V or less while reduction solenoid (SRRR) outputs OFF, reduction solenoid (SRRR) is ON continuously for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while reduction solenoid (SRRR) outputs ON, reduction solenoid (SRRR) is OFF continuously for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)
C12F662	Left Front Wheel ABS Hold Solenoid / Right Front Wheel ABS Hold Solenoid Signal Compare Failure	A difference in holding solenoid (SFLH) and holding solenoid (SFRH) output accuracy continues for 0.2 seconds or more.	Skid control ECU (Brake actuator assembly)
C12F762	Left Rear Wheel ABS Hold Solenoid / Right Rear Wheel ABS Hold Solenoid Signal Compare Failure	A difference in holding solenoid (SRLH) and holding solenoid (SRRH) output accuracy continues for 0.2 seconds or more.	Skid control ECU (Brake actuator assembly)
C13BF62	Brake Pressure Control Solenoid A/B Signal Compare Failure	A difference in master cylinder cut solenoid (SM1) and master cylinder cut solenoid (SM2) output accuracy continues for 0.2 seconds or more.	Skid control ECU (Brake actuator assembly)
C13C01C	Brake Pressure Control Solenoid "A" Control Circuit Voltage Out of Range	Any of the following is detected: When the +BS terminal voltage is 17.4 V or less while master cylinder cut solenoid (SM1) is on, overcurrent continues for 0.1 seconds or more. When the +BS terminal voltage is 17.4 V or less while master cylinder cut solenoid (SM1) is off, an open circuit continues for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while master cylinder cut solenoid (SM1) is on, an open circuit continues for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while master cylinder cut solenoid (SM1) is off, current continues to be applied for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)
C13C91C	Brake Pressure Control Solenoid "B" Control Circuit Voltage Out of Range	Any of the following is detected: When the +BS terminal voltage is 17.4 V or less while master cylinder cut solenoid (SM2) is on, overcurrent continues for 0.1 seconds or more. When the +BS terminal voltage is 17.4 V or less while master cylinder cut solenoid (SM2) is off, an open circuit continues for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while master cylinder cut solenoid (SM2) is on, an open circuit continues for 0.05 seconds or more. When the +BS terminal voltage is 17.4 V or less while master cylinder cut solenoid (SM2) is off, current continues to be applied for 0.05 seconds or more.	Skid control ECU (Brake actuator assembly)

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

NEXT

2.	RECONFIRM DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Check if the same DTC is output.

Chassis > Brake/EPB > Trouble Codes

Result	Proceed to
DTCs C059749, C12A51C, C12B01C, C12BB1C, C12C61C, C12D11C, C12DC1C, C12E71C, C12F21C, C12F662, C12F762, C13BF62, C13C01C and C13C91C are not output.	A
DTCs C059749, C12A51C, C12B01C, C12BB1C, C12C61C, C12D11C, C12DC1C, C12E71C, C12F21C, C12F662, C12F762, C13BF62, C13C01C and/or C13C91C are output.	B

HINT:

If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly), with the ignition switch turned to ON and the stop light switch off, the ECU performs self-diagnosis of the solenoid circuit.
If the normal system code is output (no DTCs are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU (brake actuator assembly).
If any DTCs are output while jiggling a connector or wire harness of the skid control ECU (brake actuator assembly), inspect and repair the connector or wire harness.
If no DTCs were output when reconfirming DTCs, checking for intermittent problems is necessary because it is suspected that the original DTCs were stored due to the poor connection of a connector terminal.

A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE ACTUATOR ASSEMBLY