ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1345/66, C1368/67

DTC Code DTC Name
C1345/66 Linear Solenoid Valve Offset Learning Undone
C1368/67 Linear Solenoid Valve Offset Malfunction

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) stores and corrects the individual differences in the brake pedal stroke sensor assembly, actuator solenoids, and stroke simulator solenoid. Perform initialization and calibration of the linear solenoid valve if any of these parts is replaced.

The skid control ECU (brake booster with master cylinder assembly) receives the park (P) signal from the hybrid vehicle control ECU assembly through the CAN communication system.

These DTCs are cleared when the linear valve offset learning results are normal.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1345/66 Linear Solenoid Valve Offset Learning Undone - Linear valve offset learning undone. Perform linear valve offset learning and check for DTCs. If no DTCs are output again, the valve is normal. Electronically controlled brake system DTC
C1368/67 Linear Solenoid Valve Offset Malfunction - Offset learned value out of specification.

  • Perform linear valve offset learning and check for DTCs. If no DTCs are output again, the valve is normal.

  • Brake actuator (Brake booster with master cylinder assembly)

 Electronically controlled brake system DTC

CAUTION / NOTICE / HINT

Note

When replacing the brake actuator (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.

Click here

Tech Tips

When C1451/72 is output together with C1345/66 and/or C1368/67, inspect and repair the trouble areas indicated by C1451/72 first.

Click here

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the power switch off.

    3. Turn the power switch on (IG).

    4. Check the DTCs (electronically controlled brake system and hybrid control system) that are output.

      for Electronically Controlled Brake System: Click here

      for Hybrid Control System: Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      DTCs (except C1345/66, C1368/67 and hybrid control system DTCs) are not output. A
      Hybrid control system DTCs are output. B
      DTCs (except C1345/66 and/or C1368/67) are output. C

      Tech Tips

      Before performing initialization and calibration of the linear solenoid valve, C1203/95 will be output.


    B

    INSPECT HYBRID CONTROL SYSTEM Click here

    C

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    A

  2. PERFORM INITIALIZATION AND CALIBRATION OF LINEAR SOLENOID VALVE


    1. Turn the power switch off.

    2. Perform initialization and calibration of the linear solenoid valve.

      Click here


      Chassis > ABS/VSC/TRC > Utility
      Tester Display
      ECB Utility
      Result
      Proceed to
      NEXT

    NEXT

  3. RECONFIRM DTC


    1. Turn the power switch off.

    2. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    3. Turn the power switch on (IG).

    4. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTCs C1345/66 and C1368/67 are not output. A
      DTCs C1345/66 and/or C1368/67 are output. B

    A

    END

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY for LHD: Click here
    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY for RHD: Click here