Anti-Lock Brake System Precaution

Brake. Corolla. Zre142 Aze141
Brake Control Dynamic Control Systems. Corolla. Zre142 Aze141

  1. EXPRESSIONS OF IGNITION SWITCH

  1. TROUBLESHOOTING PRECAUTIONS

  1. HANDLING PRECAUTIONS

  1. DTC PRECAUTION

  1. CAN COMMUNICATION SYSTEM PRECAUTIONS

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.

Expression
Switch Type
Ignition Switch (Position)
Engine Switch (Condition)
Ignition switch off
LOCK
off
Ignition switch ON
ON
on (IG)
Ignition switch ACC
ACC
on (ACC)
Engine start
START
start

2.TROUBLESHOOTING PRECAUTIONS

  1. When there is a malfunction in the 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. In order to determine the malfunctioning area, be sure to check the conditions at the time the malfunction occurred, such as DTC output and the Freeze Frame Data, and record it before disconnecting any connector or removing and installing parts.

  3. Since the system may be influenced by malfunctions in systems other than the ABS system, be sure to check for DTCs in other systems.


3.HANDLING PRECAUTIONS

  1. Be sure to remove and install the ECU, brake actuator and each sensor, etc. with the ignition switch off unless it is specified in the inspection procedure.

  2. If the ECU, brake actuator or a sensor has been removed and installed, it is necessary to check the system for problems after any parts have been reinstalled. Check for DTCs using the Techstream, and also check that system functions and signals received by the ECU are normal using Test Mode.


4.DTC PRECAUTION

  1. Warnings for some DTCs will not be cleared by just replacing the malfunctioning parts. If a warning is still displayed after completing a repair, turn the ignition switch off before beginning the clear DTC procedure.

    NOTICE:
    If a DTC for a malfunctioning part reappears after it was cleared, then it has been stored again.

5.CAN COMMUNICATION SYSTEM PRECAUTIONS

  1. The CAN communication system is used for data communication between the skid control ECU and other ECUs. If there are any problems in the CAN communication line, corresponding DTCs in the communication line are output.

  2. If any CAN communication line DTCs are output, repair the malfunction in the communication line and troubleshoot the ABS system while data 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.