DTC C1254/54 Pressure Switch Circuit: Description

The accumulator pressure sensor is connected to the skid control ECU in the master cylinder solenoid.

Fig 1: Pressure Switch Circuit Diagram

DTC DETECTING CONDITIONS AND TROUBLE AREAS REFERENCE

DTC No.	DTC Detecting Condition	Trouble Areas
C1254/54	Accumulator pressure sensor fault (Fluid pressure does not change when it should e.g. pump operates, brake pedal depressed/released).	Master cylinder solenoid (skid control ECU) Hydraulic brake booster (accumulator pressure sensor) Hydraulic brake booster (master cylinder pressure sensor)