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DTC C1256/56 Accumulator Low Pressure: Description

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

Fig 1: Accumulator Low Pressure Communication Diagram
G05629902Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC DETECTION CONDITION AND TROUBLE AREA

DTC Code DTC Detection Condition Trouble Area
C1256/56 The fluid pressure inside the accumulator is below the standard value.
  • Hydraulic brake booster
  • Hydraulic brake booster pump motor
  • Hydraulic brake booster pump motor circuit
  • Accumulator pressure sensor
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