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ANTI-LOCK BRAKE SYSTEM PRECAUTION

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  1. IGNITION SWITCH EXPRESSION

    Tip:

    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 Ignition Switch (Position) Engine Switch (Condition)
    Ignition switch off LOCK Off
    Ignition switch ACC ACC On (ACC)
    Ignition switch ON ON On (IG)
    Engine Start START Start

  2. TROUBLESHOOTING PRECAUTIONS


    1. When there are malfunctions with terminal contact points or part installation problems, removal and installation of the suspected problem parts may return the system to the normal condition either completely or temporarily.

    2. In order to determine the malfunctioning area, check the conditions at the time the malfunction occurred, such as DTC output and the Freeze Frame Data, and record them before disconnecting each 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 otherwise 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 the parts have been reassembled. Check for DTCs using the intelligent tester, and also check that system functions and signals received by the ECU are normal using Test Mode.

    3. If replacing the skid control ECU (brake actuator assembly), always replace it with a new one (if the skid control ECU (brake actuator assembly) is not replaced with a new one, DTCs may be stored).

      Note:

      Do not use a skid control ECU (brake actuator assembly) from another vehicle. (display model, etc.)

  4. DTC PRECAUTION


    1. Some DTCs cannot be cleared only by repairing the malfunctioning parts. If the DTC is output after repair work, turn the ignition switch off to clear the DTC.

      Note:

      If a part is still malfunctioning even after the DTC is cleared, the DTC will be stored again.