Code No. P0555: Brake booster pressure circuit



caution If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).

TROUBLE JUDGEMENT


The PHEV-ECU stores diagnosis code No. P0555 when the brake fluid pressure signal is abnormal.

PROBABLE CAUSES



  • Malfunction of CAN bus line
  • Malfunction of hydraulic unit (integrated with ASC-ECU)
  • Malfunction of PHEV-ECU

DIAGNOSIS PROCEDURE



1.M.U.T.-III CAN bus diagnostics.
2.M.U.T.-III other system diagnosis code (ASC-ECU). Refer to GROUP 35C - Diagnosis Code Chart or .
3.M.U.T.-III PHEV-ECU diagnosis code. Refer to .