ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1345, C1368

DTC Code DTC Name
C1345 Linear Solenoid Valve Offset Learning undone
C1368 Linear Solenoid Valve Offset

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) stores the individual characteristics of each linear solenoid built into the brake booster with master cylinder assembly. Based on the stored information, the skid control ECU (brake booster with master cylinder assembly) calibrates the individual differences and controls systems.

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 solenoid valve offset learning results are normal.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1345 Linear Solenoid Valve Offset Learning undone 1133 The linear solenoid valve offset learning value is not stored. Perform linear solenoid valve offset learning and check for DTCs. If no DTCs are output again, the valve is normal.

Electronically controlled brake system DTC

Tech Tips

During test mode, related DTCs are cleared.
C1368 Linear Solenoid Valve Offset 1134 The linear solenoid valve offset learning value cannot be obtained.

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

  • Skid control ECU (brake booster with master cylinder assembly)

 Electronically controlled brake system DTC

CAUTION / NOTICE / HINT

Note

After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

Click here

Tech Tips

Before performing linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization, DTC C1203 will be output.

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 that DTCs other than C1345, C1349 and C1392 are not output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      OK
      DTCs other than C1345, C1349 and C1392 are not output.
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    OK

  2. PERFORM AIR BLEEDING


    1. Perform the air bleeding procedure in Bleed Brake System.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  3. PERFORM LINEAR SOLENOID VALVE OFFSET LEARNING


    1. Turn the power switch off.

    2. Check and ensure the following conditions required for performing linear solenoid valve offset learning and then perform linear solenoid valve offset learning.

      Click here


      Chassis > ABS/VSC/TRC > Utility
      Tester Display
      ECB Utility

      1. The auxiliary battery voltage is 11 to 15.5 V when the power switch is on (READY).

      2. The brake actuator (brake booster with master cylinder assembly) is not hot.

      3. The hybrid control system is not malfunctioning.

      4. The shift lever is in P.

      5. The READY light in the combination meter assembly is illuminated.

      6. The brake pedal is not depressed.

      7. The parking brake is released.

      8. DTC C1451 (Motor Drive Permission Malfunction) is not output. (If it is output, bleed the air from the high-pressure tube.)

      Result
      Proceed to
      NEXT

    NEXT

  4. RECONFIRM 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 if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTCs C1345 and C1368 are not output. A
      DTCs C1345 and/or C1368 are output. (for LHD) B
      DTCs C1345 and/or C1368 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