AUTOMATIC TRANSAXLE SYSTEM DIAGNOSIS SYSTEM


  1. EURO-OBD


    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. B000L3OE03

      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 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.

    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


    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 (GTS only).

  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 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, whether the air/fuel ratio was lean or rich, as well as other data stored at the time of a malfunction.

    2. B000LVGE01

      The GTS records freeze frame data in 5 different instances: 1) 3 times before the DTC is set, 2) once when the DTC is set, and 3) once after the DTC is set. 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 BATTERY VOLTAGE


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

  7. CHECK MIL


    1. The MIL is illuminated when the engine switch is turned on (IG) (engine not started).

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

      Tech Tips

      If the MIL is not illuminated when the engine switch is turned on (IG), check the MIL circuit Click here.