DTC C1400-00: Brake Pressure Leak Malfunction; DTC C140A-00: Pressure Control Reservoir Leak Malfunction [11/2021 - 10/2023]: Description

The No. 2 skid control ECU (brake actuator assembly) controls the brake fluid pressure of each wheel cylinder based on the brake fluid pressure sensor.

DTCs may be stored if one of the following occurs:

Brake fluid leaks.
Foreign matter enters a solenoid valve.
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	DTC Detection Condition	Trouble Area	MIL	Note
C1400-00	Brake Pressure Leak Malfunction	Malfunction (leakage, etc.) detected in the ABS decrease pressure valve in the brake actuator assembly.	Brake booster with master cylinder assembly Brake actuator assembly	Does not come on	Output ECU: No. 2 skid control ECU (brake actuator assembly)
C140A-00	Pressure Control Reservoir Leak Malfunction	After the vehicle is driven at a certain speed and the ignition switch is turned off for 90 seconds, a malfunction is detected by the No. 2 skid control ECU (brake actuator assembly) during self-diagnosis.	Brake booster with master cylinder assembly Brake actuator assembly	Does not come on	Output ECU: No. 2 skid control ECU (brake actuator assembly)