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Home >> Lexus >> 2022 >> UX 250h Base >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (Diagnostic Codes) (2 Of 4) (Hybrid) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1349: Pressure Holding Solenoid Valve Learning Undone; DTC C134A: Pressure Holding Solenoid Valve Learning Malfunction [10/2018 - ] >> Monitor Description

Monitor Description

SAE Code C1349: 

  1. After any of the following situations, if learning of the ABS holding solenoid for one wheel or more is not stored and the vehicle is being driven at a certain speed or more, the skid control ECU (brake booster with master cylinder assembly) judges that the learning of the ABS holding solenoid valve is not performed and illuminates the MIL and stores this DTC.
    1. The skid control ECU (brake booster with master cylinder assembly) has been replaced with a new one.
    2. After the brake actuator assembly, brake pedal stroke sensor assembly or brake pedal is removed and installed or replaced, the zero point is cleared.

C1349 (INF Code 1155): 

  1. After any of the following situations, if learning of the ABS holding solenoid for one wheel or more has not been performed, or learning has been performed but no learning value was stored, the skid control ECU (brake booster with master cylinder assembly) judges that the learning of the ABS holding solenoid valve is not performed and illuminates the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction) and slip indicator lights and stores this DTC.
    1. The skid control ECU (brake booster with master cylinder assembly) has been replaced with a new one.
    2. After the brake actuator assembly, brake pedal stroke sensor assembly or brake pedal is removed and installed or replaced, the zero point is cleared.

      HINT: 

      As the detection conditions slightly differ from SAE code C1349, the detection conditions for DTC C1349 (INF code 1155) is also provided.