СИСТЕМА МЕХАНИЧЕСКОЙ ТРАНСМИССИИ СИСТЕМА ДИАГНОСТИКИ


  1. EURO-OBD (EUROPEAN SPEC)


    1. When troubleshooting Europe On-Board Diagnostic (Euro-OBD) vehicles, an OBD scan tool (complying with ISO 15765-4) must be connected to the vehicle. Various data output from the vehicle's ECM can then be read.

    2. A01LW17

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


      • The emission control system/components

      • The powertrain control components (which affect vehicle emissions)

      • The computer

      In addition, the applicable Diagnostic Trouble Codes (DTCs) prescribed by ISO 15765-4 are stored 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.

    3. To check for DTCs, connect the GTS to the Data Link Connector 3 (DLC3) of the vehicle. 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.

      Click here

  2. NORMAL MODE AND CHECK MODE (GTS Only)


    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 as an option for technicians. In check mode, 1 trip detection logic is used for duplicating malfunction symptoms and increasing the system's ability to detect malfunctions, including intermittent problems.

  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 subsequent driving 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 and whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

  5. DATA LINK CONNECTOR 3 (DLC3)


    1. Check the DLC3.

      Click here

  6. BATTERY VOLTAGE

    If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

  7. MIL (Malfunction Indicator Lamp)


    1. The MIL is illuminated when the ignition switch is turned to ON (with the engine not running).

      If the MIL does not illuminate, check the MIL circuit.

      Click here

    2. The MIL will turn off when the engine is started. If the MIL remains illuminated, the diagnosis system has detected a malfunction or abnormality in the system.