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 system(s) after the terminal is reconnected.





1. TROUBLESHOOTING PRECAUTION

NOTICE:
- When there is a malfunction in the contact point of the terminals or installation problems with parts, 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 malfunctioning area, be sure to check the conditions at the time the malfunction occurred, such as by DTC output and freeze frame data output, and record it before disconnecting each connector or removing and installing parts.
- Since the ABS with EBD & BA & TRAC & VSC systems may be influenced by a malfunction in the other systems, be sure to check for DTCs in the other systems.
- Be sure to remove and install the ABS & TRACTION actuator assembly and each sensor with the ignition switch off unless specified in the inspection procedure.
- When removing and installing the ABS & TRACTION actuator assembly and each sensor, be sure to check that the normal display is output in the test mode inspection and in DTC output inspection after installing all the parts.
- After replacing the ABS & TRACTION actuator assembly and/or the yaw rate and acceleration sensor, make sure to perform yaw rate and acceleration sensor zero point calibration.
- The CAN communication system is used for data communication between the skid control ECU, the steering angle sensor, and the yaw rate sensor (the acceleration sensor is included).
If there is trouble in the CAN communication line, the DTC of the communication line is output.
- If the DTC of the CAN communication line is output, repair the malfunction in the communication line and troubleshoot the ABS with EBD & BA & TRAC & VSC systems.
- Since the CAN communication line has its own length and route, it cannot be repaired temporarily with the bypass wire, etc.

2. EXPRESSIONS OF IGNITION SWITCH
The type of ignition switch used on this model differs according to the specifications of the vehicle.
The expressions listed in the table below are used.