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 shift position P signal from the power management control ECU through the CAN communication system.

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

DTC No. INF Code DTC Detection Condition Trouble Area
C1345/66 - Linear valve offset learning undone. Perform linear valve offset learning and check for DTCs. If no DTCs are output again, the valve is normal.
C1368/67 - 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)

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.

    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 (See page for the electronically controlled brake system, or Click here for the hybrid control system).

      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.


    NEXT

  3. RECONFIRM DTC


    1. Turn the power switch off.

    2. Clear the DTCs Click here.

    3. Turn the power switch on (IG).

    4. Check if the same DTC is output Click here.

      Result
      Result Proceed to
      DTCs C1345/66 and C1368/67 are not output. A
      DTCs C1345/66 and/or C1368/67 are output (for LHD). B
      DTCs C1345/66 and/or C1368/67 are output (for RHD). C

    A

    END

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    C

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here