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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: Master Cylinder Solenoid Communication Diagram
G05262739Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

If the code (C1254/54) is output, the following conditions will occur:

DTC DETECTION CONDITION CHART

DTC Code DTC Detection Condition Trouble Area
C1254/54 Accumulator pressure sensor malfunction (Fluid pressure does not change when the pump operates or when the brake is applied.)
  • Hydraulic brake booster
  • Accumulator pressure sensor
  • Master cylinder pressure sensor