СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ (для моделей с 1TR-FE) СИСТЕМА ДИАГНОСТИКИ


  1. J-OBD2


    1. When troubleshooting J-OBD2 vehicles, the vehicle must be connected to the GTS. Various data output from the ECM can then be read.

    2. A003B1Z

      OBD regulations require that the vehicle's on-board computer illuminates the MIL on the instrument panel when the computer detects a malfunction in:


      1. The emission control system/components.

      2. The powertrain control components (which affect vehicle emissions).

      3. The computer

        In addition, the applicable DTCs are recorded in the ECM memory.

        If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain recorded in the ECM memory.

  2. NORMAL MODE AND CHECK MODE


    1. The diagnosis system operates in "normal mode" during normal vehicle use. In normal mode, "2 trip detection logic" is used to ensure accurate detection of malfunctions. "Check mode" is also available to technicians as an option. In check mode, "1 trip detection logic" is used for simulating malfunction symptoms and increasing the system's ability to detect malfunctions, including intermittent malfunctions.

  3. 2 TRIP DETECTION LOGIC


    1. When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory (1st trip). If the same malfunction is detected during the next drive cycle, the MIL is illuminated (2nd trip).

  4. FREEZE FRAME DATA


    1. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

    2. A003EN4E18

      The GTS records freeze frame data in 5 different instances: 1) 3 times before the DTC is stored, 2) once when the DTC is stored, and 3) once after the DTC is stored. These sets of data can be used to simulate the vehicle condition around the time when the malfunction occurred. The data may help in finding the cause of the malfunction, or in judging if the DTC was caused by a temporary malfunction.

  5. CHECK DATA LINK CONNECTOR 3 (DLC3)


    1. Check the DLC3 Click here.

  6. CHECK MIL


    1. Check that the MIL illuminates when turning the ignition switch to ON.

      If the MIL does not illuminate, there is a problem in the MIL circuit Click here.

    2. When the engine is started, the MIL should turn off.