BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM BC–1 ANTI-LOCK BRAKE SYSTEM PRECAUTION 1. 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 in this section. Switch Type Expression Ignition Switch (Position) Engine Switch (Condition) Ignition switch off LOCK off Ignition switch on (IG) ON on (IG) Ignition switch on (ACC) ACC on (ACC) Engine start START start 2. TROUBLESHOOTING PRECAUTION HINT: The anti-lock brake system includes the ABS and EBD. BC (a) When there is a malfunction in the terminal contact points or installation problems with parts, removing and installing the suspected problem parts may return the system to normal, pletely or temporarily. (b) In order to determine the malfunctioning area, be sure to check the conditions at the time the malfunction occurred, such as by the DTC output and the freeze frame data output, and record it before disconnecting each connector or removing and installing parts. (c) Be sure to remove and install the brake actuator and each individual sensor with the ignition switch off unless otherwise specified in the inspection procedure. (d) If the brake actuator or a sensor 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. 3. MUNICATION SYSTEM PRECAUTION (a) The munication system is used for data communication between each of the ECUs and sensors. If there is trouble in the CAN communication line, a DTC of munication line is output. (b) If a DTC of the munication line is output, repair the malfunction in munication line and troubleshoot the anti-lock brake system. BC–2 BRAKE CONTROL –
