DTC C1341: Hydraulic System Malfunction (FR); DTC C1342: Hydraulic System Malfunction (FL); DTC C1343: Hydraulic System Malfunction (RR); DTC C1344: Hydraulic System Malfunction (RL) [05/2023 - ]: Description

To control the braking force for each wheel, the skid control ECU assembly inputs the operating fluid pressure of each wheel cylinder from the wheel cylinder pressure sensors.

DTCs may be stored if one of the following occurs:

Brake fluid leaks.
Wheel cylinder vibrates due to uneven wear of a brake disc.
Foreign matter enters solenoid valve.
Line pressure drops during air bleeding.
Brake pads are replaced.
Rotors are replaced.
HINT:

When replacing the brake pads, retracting the brake caliper pistons and installing new brake pads will greatly increase the clearance between the brake pads and brake discs. This will result in a significant possibility of this DTC being stored the next time the brake pedal is depressed. As this is not a malfunction, clear the DTC if it is stored for this reason.

DTC No.	Detection Item	INF Code	DTC Detection Condition	Trouble Area	Note
C1341	Hydraulic System Malfunction (FR)	551 552 553 554 555	INF Code: 551 Decrease in FR wheel hydraulic pressure control performance. (Pressure increase malfunction) INF Code: 552 Decrease in FR wheel hydraulic pressure control performance. (Pressure decrease malfunction) INF Code: 553 Malfunctions such as leaks occur in the FR wheel pressure increase control valve. INF Code: 554, 555 Malfunctions such as leaks occur in the FR wheel pressure decrease control valve.	INF Code: 551, 552 Brake fluid leaks Brake actuator assembly INF Code: 553, 554, 555 Brake fluid leaks Brake disc rotor excessive wear Brake actuator assembly	-
C1342	Hydraulic System Malfunction (FL)	561 562 563 564 565	INF Code: 561 Decrease in FL wheel hydraulic pressure control performance. (Pressure increase malfunction) INF Code: 562 Decrease in FL wheel hydraulic pressure control performance. (Pressure decrease malfunction) INF Code: 563 Malfunctions such as leaks occur in the FL wheel pressure increase control valve. INF Code: 564, 565 Malfunctions such as leaks occur in the FL wheel pressure decrease control valve.	INF Code: 561, 562 Brake fluid leaks Brake actuator assembly INF Code: 563, 564, 565 Brake fluid leaks Brake disc rotor excessive wear Brake actuator assembly	-
C1343	Hydraulic System Malfunction (RR)	571 572 573 574 575	INF Code: 571 Decrease in RR wheel hydraulic pressure control performance. (Pressure increase malfunction) INF Code: 572 Decrease in RR wheel hydraulic pressure control performance. (Pressure decrease malfunction) INF Code: 573 Malfunctions such as leaks occur in the RR wheel pressure increase control valve. INF Code: 574, 575 Malfunctions such as leaks occur in the RR wheel pressure decrease control valve.	INF Code: 571, 572 Brake fluid leaks Brake actuator assembly INF Code: 573, 574, 575 Brake fluid leaks Brake disc rotor excessive wear Brake actuator assembly	-
C1344	Hydraulic System Malfunction (RL)	581 582 583 584 585	INF Code: 581 Decrease in RL wheel hydraulic pressure control performance. (Pressure increase malfunction) INF Code: 582 Decrease in RL wheel hydraulic pressure control performance. (Pressure decrease malfunction) INF Code: 583 There is a malfunction or leak in the RL wheel pressure increase control valve. INF Code: 584, 585 There is a malfunction or leak in the RL wheel pressure decrease control valve.	INF Code: 581, 582 Brake fluid leaks Brake actuator assembly INF Code: 583, 584, 585 Brake fluid leaks Brake disc rotor excessive wear Brake actuator assembly	-