ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1345/66 and 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 hybrid vehicle control ECU 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

Tip:

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
      Tip:

      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 off.

    4. Turn the power switch on (IG).

    5. 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

    for RHD:Click here