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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: Master Cylinder Solenoid Communication Diagram
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DTC DETECTION CONDITION CHART

DTC Code DTC Detection Condition Trouble Area
C1256/56 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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