Precaution [11/2023 - ]

HINT: 

When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

Refer to AUTOMATIC LEARNING CHART [11/2023 - ]

1. When there is a malfunction with terminal contact points or part installation problems, removal and installation of the suspected parts may return the system to normal either completely or temporarily.
2. Before disconnecting a connector or removing and installing a component in order to narrow down the malfunctioning part, make sure to perform the following procedure.
   • Check for and record any DTCs and Freeze Frame Data that were stored around the time that the malfunction occurred.
   • If any open circuit DTCs related to intermittent (momentary interruptions) malfunctions are output, check the intermittent monitor.

     Refer to DATA LIST / ACTIVE TEST [11/2023 - ]

   NOTE:

   Before disconnecting connectors or fuses, turn the engine switch off and wait 20 seconds or more*.

   1. *: Differs according to vehicle conditions
3. Since the system may be influenced by malfunctions in systems other than the electronically controlled brake system, be sure to check for DTCs in other systems.

1. Always ensure that the ignition switch is off before removing the brake actuator assembly or a sensor unless specifically instructed by the repair information.
2. When replacing the brake actuator assembly, always replace it with a new one.
   NOTE:

   Never use a brake actuator assembly from another vehicle, including new vehicles.

3. If the brake actuator assembly or a sensor has been removed and installed, always perform a Dealer Mode (Signal Check) inspection and check for DTCs after completion of installation to confirm that the system is operating correctly.
4. Do not remove and install any electronically controlled brake system components not specified by the repair information or the system may not operate correctly due to loss of calibration.
5. When performing diagnosis and repair for the electronically controlled brake system, follow all specified procedures and perform the necessary inspections after completion.

1. If the warning lights are illuminated due to a malfunction, the warning lights will only turn off for some DTCs when the malfunction is repaired and the DTCs are cleared.
2. If a warning lights are illuminated, it is necessary to follow the procedure to turn off the warning lights.
   WARNING CLEARING PROCEDURE
   
   

   DTC No.	Procedure
   C0500-1F C0500-23 C0500-3A C0506-1F C0506-23 C0506-3A C050C-1F C050C-23 C050C-3A C0512-1F C0512-23 C0512-3A C0520-1C C0520-96	Repair or replace with new part Turn ignition switch to ON Drive (30 km/h or higher for 30 seconds) → Warning light turns off
   C0040-9E C0040-9F C1380-7E C1380-7F P0571-11	Repair or replace with new part Turn the ignition switch to ON and stop the vehicle for 5 seconds or more, and then lightly depress the brake pedal 2 or 3 times → Warning light turns off
   C0526-96 C14FE-14	Repair or replace with new part Turn ignition switch to ON after idling for 3 seconds → Warning light turns off
   C0063-96	Repair or replace with new part Turn ignition switch to ON after idling for 10 seconds → Warning light turns off

   NOTE:

   • Use caution when operating the vehicle when the warning lights are illuminated as the system may not operate due to a fail-safe function.
   • After clearing the DTCs, the DTCs will be stored again if the malfunction persists.

1. After replacing certain components, it may be necessary to update the ECU security key.

   Refer to WORK PROCEDURE [11/2023 - ]

2. After replacing the skid control ECU (brake actuator assembly), perform "Calibration".

   Refer to UTILITY [11/2023 - ] 

3. After replacing or reinstalling the yaw rate and acceleration sensor (airbag sensor assembly), perform "Calibration".

   Refer to UTILITY [11/2023 - ] 

4. After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.

   Refer to TEST MODE PROCEDURE [11/2023 - ] 

5. After replacing or removing and installing a speed sensor rotor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.

   Refer to TEST MODE PROCEDURE [11/2023 - ] 

When testing with a 2-wheel drum tester such as a speedometer tester, combination tester for the speedometer and brakes, or chassis dynamometer, or when jacking up the front wheels and turning the wheels, perform the following procedure to enter Inspection Mode and disable the TRAC and VSC systems.

For entering Inspection Mode: Refer to UTILITY [11/2023 - ] 

1. Switching of mode

   Operating the VSC OFF switch switches the system between normal mode, TRAC off mode and VSC off mode.

   1. Normal mode

      If the VSC OFF switch is pressed when in TRAC off mode or VSC off mode, the system enters normal mode.

      In normal mode, TRAC and VSC are enabled.

      The system is set to normal mode when the ignition switch is turned to ON.

   2. TRAC off mode

      If the VSC OFF switch is pressed when in normal mode, the system enters TRAC off mode. When in TRAC off mode, TRAC is disabled and the multi-information display in the combination meter assembly displays "Traction Control Turned Off".

      When the vehicle reaches a certain vehicle speed when in TRAC off mode, the system automatically returns to normal mode.

   3. VSC off mode

      When the VSC OFF switch is pressed and held for 3 seconds or more with the vehicle stopped, the system enters VSC off mode. When in VSC off mode, TRAC and VSC are disabled, the multi-information display in the combination meter assembly displays "Traction Control Turned Off" and the VSC OFF indicator light is illuminated.

      The system does not automatically return to normal mode based on vehicle speed when in VSC off mode.

1. The CAN communication system is used for communication between the skid control ECU (brake actuator assembly), steering angle sensor, yaw rate and acceleration sensor (airbag sensor assembly) and other ECUs. If there is a malfunction in a CAN communication line, communication DTCs related to the affected systems will be stored.
2. If any CAN communication DTCs are output, repair the malfunction, then troubleshoot the electronically controlled brake system while communication is normal.
3. In order to enable CAN communication, a specific type of wiring is used for the CAN communication lines. The wiring used for each communication line is a twisted pair of wires that have an equal length. A bypass wire should not be used because the data being transmitted will be corrupted.