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Home >> Lexus >> 2022 >> LS 500h AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/ Advanced Park) - Diagnostic Codes (5 Of 5) & Symptom Tests >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Advanced Park) >> DTC C1505-7E: Brake Pressure Control solenoid "E" Actuator Stuck On; DTC C150B-7E: Brake Pressure Control solenoid "F" Actuator Stuck On [11/2021 - 10/2023] >> Procedure

DTC C1505-7E: Brake Pressure Control solenoid "E" Actuator Stuck On; DTC C150B-7E: Brake Pressure Control solenoid "F" Actuator Stuck On [11/2021 - 10/2023]: Procedure

  1. CHECK DTC 
    1. Check the DTCs that are output.

      Chassis > Brake Booster > Trouble Codes 

      Chassis > Brake/EPB > Trouble Codes 

      Result

      Result Proceed to
      Only DTCs C1505-7E and/or C150B-7E are output. A
      DTCs other than C1505-7E and/or C150B-7E are output. B

    Result: 

    A 

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

    Result: 

    B 

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS