Antilock Brakes / Traction Control Systems: Service Precautions

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: PRECAUTION

PRECAUTION
NOTE: When disconnecting the negative (-) battery terminal, initialize the following systems after the terminal is reconnected.





- When there is a malfunction in the contact point of the terminals or installation problems with part, the removal and installation of the suspected problem parts may return the system to the normal condition either completely or temporarily.
- In order to determine the malfunction area, be sure to check the conditions at the time the malfunction occurred, such as by DTC output and the Freeze Frame Data output, and record it before disconnecting each connector or removing and installing parts.
- Be sure to remove and install the skid control ECU, brake actuator and each sensor with the ignition switch off unless specified in the inspection procedure.
- If the skid control ECU, brake actuator, or a season has been removed and installed, it is necessary to check the system for problems after the parts have been reassembled. Check for DTCs using the intelligent tester, also check that system functions and signals received by the ECU are normal using test mode.
- After replacing the yaw rate sensor (the acceleration sensor is included) and/or the brake actuator assembly, make sure to perform yaw rate and acceleration sensor zero point calibration Calibration.
- CAN communication system is used for the data communication between the skid control ECU (included in the actuator), the steering angle sensor, and the yaw rate sensor (the acceleration sensor is included). If there is trouble in the CAN communication line, a DTC in the communication line is output.
- If a DTC in the CAN communication line is output, repair the malfunction in the communication line and troubleshoot the VSC system under the condition that data communication is normal.
- 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 date being transmitted will be corrupted.