СИСТЕМА ECD СИСТЕМА ДИАГНОСТИКИ

  1. DESCRIPTION

    A012FV9

    1. When troubleshooting a Euro-OBD (On-Board Diagnostic) vehicle, an GTS or OBD scan tool must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle's ECM (Engine Control Module) can be then read.

    2. Euro-OBD regulations require that the vehicle's on- board computer illuminates the MIL (Malfunction Indicator Lamp) on the instrument panel when the computer detects a malfunction in:

      1. The emission control system components.

      2. The power train control components (which affect vehicle emissions).

      3. The computer itself. If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs will remain stored in the ECM memory.

    3. To check the DTCs, connect an GTS to the DLC3. The GTS displays DTCs, freeze frame data, and a variety of engine data. The DTCs and freeze frame data can be cleared with the GTS (refer to DTC Check/Clear).

      Click hereНажмите здесь

  2. 2-TRIP DETECTION LOGIC

    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 subsequent drive cycle, the MIL is illuminated (2nd trip).

  3. FREEZE FRAME DATA

    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.

  4. DLC3 (Data Link Connector 3) (Click here Нажмите здесь)

  5. INSPECT BATTERY VOLTAGE

    Standard Voltage
    11 to 14 V

    If the voltage is below 11 V, recharge or replace the battery.

  6. CHECK MIL

    1. The MIL illuminates when the ignition switch is turned to ON and the engine is not running.

      A012FV9
      Tip:

      If the MIL is not illuminated, check the MIL circuit.

      Click here Нажмите здесь

    2. When the engine is started, the MIL should turn OFF. If the MIL remains ON, the diagnosis system has detected a malfunction or abnormality in the system.

  7. ALL READINESS

    Tip:

    • With "All Readiness" you can check whether or not the DTC judgment has been completed by using the GTS.

    • You should check "All Readiness" after simulating malfunction symptoms or for validation after finishing repairs.

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and the GTS on.

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 30 seconds.

    5. Perform the DTC judgment driving pattern to run the DTC judgment.

    6. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      Powertrain > Engine and ECT > Utility
      Tester Display
      All Readiness

    7. Input the DTCs to be confirmed.

    8. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform the driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit