Utility [12/2019 - 11/2023]

1. If any of the parts listed in the following table are replaced or adjusted, it is necessary to perform the specified operation.
   NOTE:

   Learning cannot be performed again until the values stored during the previous learning (linear solenoid valve offset, SM solenoid valve offset, brake pedal stroke sensor assembly zero point, system information, and yaw rate and acceleration sensor zero point) have been cleared. After replacing parts, clear the previous values before performing learning.

   NECESSARY OPERATIONS AFTER REPLACEMENT OR ADJUSTMENT
   
   

   Parts to be Replaced / Operation	Necessary Operation
   No. 1 skid control ECU (brake booster with master cylinder assembly) No. 2 skid control ECU (brake actuator assembly)	Bleed air. Perform "Calibration".
   Brake pedal stroke sensor assembly* Brake pedal* Yaw rate sensor*	Perform "Calibration".
   Brake pedal stroke sensor assembly adjustment Wheel alignment adjustment	Perform "Calibration".

   *: Even when not replacing the part, it is necessary to perform the specified necessary procedures after installation.

*: Electronically Controlled Brake System

HINT: 

When entering Dealer Mode (Calibration), the No. 2 skid control ECU (brake actuator assembly) communicates with the forward recognition camera to judge whether the vehicle is equipped with the pre-collision system. Therefore, do not exit Dealer Mode (Calibration) within 5 seconds of entering Dealer Mode (Calibration).

1. To ensure that calibration completes correctly, confirm the following items before performing "Calibration":
   1. The auxiliary battery voltage is 11 to 15.5 V when the ignition switch is turned to ON (READY).
   2. The brake booster with master cylinder assembly and brake actuator assembly are not hot.

      HINT: 

      If the temperature of the brake booster with master cylinder assembly or brake actuator assembly is excessively high, wait until it cools down before performing "Calibration".

2. Clear the linear solenoid valve offset, SM solenoid valve offset, brake pedal stroke sensor assembly zero point, system information, and yaw rate and acceleration sensor zero point.
   1. Turn the ignition switch off.
   2. Check that the steering wheel is centered.
   3. Check that the shift lever is in P.
   4. Connect the GTS to the DLC3.
   5. Turn the ignition switch to ON.
   6. Turn the GTS on.
   7. Using the GTS, clear the linear solenoid valve offset, SM solenoid valve offset, brake pedal stroke sensor assembly zero point, system information, and yaw rate and acceleration sensor zero point. Enter the following menus: Chassis / Brake/EPB* / Utility / Reset Memory.

      *: Electric Parking Brake System

      Chassis > Brake/EPB > Utility 

      Tester Display
      Reset Memory

      NOTE:

      When performing "Reset Memory", each warning light or indicator light illuminates or flashes, and a DTC indicating that learning is incomplete and/or vehicle control history is stored.

   8. Turn the ignition switch off.
      NOTE:

      If the ignition switch is turned to ON for more than 15 seconds with the shift lever in P after the zero point of the yaw rate and acceleration sensor has been cleared, only the zero point of the yaw rate sensor will be stored. If the vehicle is driven under these conditions, the No. 2 skid control ECU (brake actuator assembly) will store the zero point calibration for the acceleration sensor as not being completed. The No. 2 skid control ECU (brake actuator assembly) will then also indicate this as a malfunction of the VSC system using the indicator light.

3. Perform linear solenoid valve offset learning, SM solenoid valve offset learning, brake pedal stroke sensor assembly zero point calibration, system information memorization, and yaw rate and acceleration sensor zero point calibration.
   NOTE:

   This procedure can be performed only once per trip. For that reason, if it is necessary to perform learning again, turn the ignition switch off for 4 minutes or more before turning the ignition switch to ON again.

   HINT: 

   • When Dealer Mode (Calibration) is entered, linear solenoid valve offset learning, SM solenoid valve offset learning, brake pedal stroke sensor assembly zero point calibration, system information memorization, and yaw rate and acceleration sensor zero point calibration will be performed automatically.
   • If linear solenoid valve offset learning has not been performed, DTC C1345-00 or C1345-51 is stored.
   • If SM solenoid valve offset learning has not been performed, DTC C13B9-51 is stored.
   • If brake pedal stroke sensor assembly zero point calibration has not been performed, DTC C05C0-00, C05C0-51, C05C1-00 or C05C1-51 is stored.
   • If system information memorization has not been performed, DTC C124A-00, C124A-05 or C136F-00 is stored.
   • If yaw rate sensor zero point calibration has not been performed, DTC C1210-54 or X204C is stored.
   • If acceleration sensor zero point calibration has not been performed, DTC C051D-00 or C051D-54 is stored.
   1. Turn the ignition switch off.
   2. Check that the steering wheel is centered.
   3. Check that the shift lever is in P.
   4. Connect the GTS to the DLC3.
   5. Turn the ignition switch to ON.
   6. Check that the parking brake is released.
      NOTE:

      • If the parking brake is not released, linear solenoid valve offset learning and SM solenoid valve offset learning cannot be performed.
      • If the parking brake is engaged during linear solenoid valve offset learning and SM solenoid valve offset learning, learning will be suspended.

        In this case, learning will resume when the parking brake is released.

      • After replacing the brake actuator assembly, the parking brake indicator light (red) blinks when the ignition switch is turned to ON for the first time. To turn off the parking brake indicator light (red) after replacing the brake actuator assembly, operate the electric parking brake switch (electric parking brake switch assembly) to the lock side then to the release side.
   7. Turn the GTS on.
   8. Switch the skid control ECU to Dealer Mode (Calibration) using the GTS. Enter the following menus: Chassis / Brake/EPB* / Utility / Calibration.

      *: Electric Parking Brake System

      Chassis > Brake/EPB > Utility 

      Tester Display
      Calibration

   9. Wait for approximately 4 minutes with the vehicle stopped without depressing the brake pedal and confirm that the ABS warning light, brake system warning light (yellow indicator) and slip indicator light flash the Dealer Mode pattern (blinks at 0.25 second intervals).
      NOTE:

      • Do not depress the brake pedal when performing "Calibration".
      • If Dealer Mode is entered when the shift position is in a position other than P, DTC C051D-00, C051D-54 or C1210-54 is stored.

      HINT: 

      • An auxiliary battery voltage of 10 V or more is required during learning. If the auxiliary battery voltage drops below 10 V, learning may be canceled. The time required for learning changes depending on the auxiliary battery voltage.
      • If linear solenoid valve offset learning does not complete, DTCs C1345-00 or C1345-51 will be stored. In this case, perform learning again after clearing the DTCs and turning the ignition off.
      • If SM solenoid valve offset learning does not complete, DTC C13B9-51 will be stored. In this case, perform learning again after clearing the DTCs and turning the ignition off.
      • After "Calibration" completes, the ABS warning light, brake system warning light (yellow indicator) and slip indicator light flash the Dealer Mode pattern (blinks at 0.25 second intervals).
      • Do not exit Dealer Mode (Calibration) within 5 seconds of entering Dealer Mode (Calibration). If Dealer Mode (Calibration) is exited within 5 seconds of entering Dealer Mode (Calibration), DTC U023A-87 may be stored. If DTC U023A-87 is output after exiting Dealer Mode (Calibration), enter Dealer Mode (Calibration) again, wait at least 5 seconds, then recheck for DTCs.
   10. Check that "complete" is displayed for Dealer Mode (Signal Check) Inspection Item "Learning of Stroke Sensor Zero Point".
   11. Turn the ignition switch off.
   12. Disconnect the GTS.

HINT: 

• With "All Readiness", you can check whether or not the DTC judgment has been completed by using the GTS.
• You should check "All Readiness" after simulating malfunction symptoms or for validation after finishing repairs.

1. Turn the ignition switch off.
2. Connect the GTS to the DLC3.
3. Turn the ignition switch to ON
4. Turn the GTS on.
5. Clear the DTCs even if no DTCs are stored. Enter the following menus: Chassis / Brake Booster / Trouble Codes.

   Chassis > Brake Booster > Clear DTCs 

6. Clear the DTCs even if no DTCs are stored. Enter the following menus: Chassis / Brake/EPB* / Trouble Codes.

   *: Electric Parking Brake System

   Chassis > Brake/EPB > Clear DTCs 

7. Press the clear button.
8. Turn the ignition switch off.
9. Turn the ignition switch to ON (READY).
10. Perform the DTC judgment driving pattern to run the DTC judgment.
11. Enter the following menus: Chassis / Brake Booster / Utility / All Readiness.

    Chassis > Brake Booster > Utility 

    Tester Display
    All Readiness

12. Enter the following menus: Chassis / Brake/EPB* / Utility / All Readiness.

    *: Electric Parking Brake System

    Chassis > Brake/EPB > Utility 

    Tester Display
    All Readiness

13. Input the DTC to be confirmed.
14. Check the DTC judgment result.

    GTS Display	Description
    Normal	DTC judgment completed System normal
    Abnormal	DTC judgment completed System abnormal
    Incomplete	DTC judgment not completed Perform the driving pattern
    N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit Perform the driving pattern

    If the judgment result shows Incomplete or N/A, perform the DTC confirmation driving pattern again.