AUTOMATIC TRANSMISSION SYSTEM DIAGNOSIS SYSTEM


  1. OBD II (w/ Canister Pump Module)


    1. When troubleshooting On-Board Diagnostic (OBD II) vehicles, an OBD II scan tool (complying with SAE J1987) must be connected to the vehicle. Various data output from the vehicle ECM can then be read.

    2. B000YSV

      OBD II 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 SAE J2012 are recorded in the ECM memory.

      If a malfunction does not recur, the MIL remains illuminated until the engine switch is turned off, and the MIL turns off when the engine is started. However, the DTCs will remain recorded in the ECM memory.

    3. To check 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. EURO-OBD (w/o Canister Pump Module)


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

    2. B000UCB

      Euro-OBD regulations require that the vehicle's on-board computer illuminate the Malfunction Indicator Lamp (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 Diagnostic Trouble Codes (DTCs) prescribed by ISO 15765-4 are stored in the ECM memory. If the malfunction does not reoccur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain stored in the ECM memory.

        To check DTCs, connect the GTS or OBD scan tool to the Data Link Connector 3 (DLC3) of the vehicle. The scan tool displays DTCs, the freeze frame data and a variety of engine data. The DTCs and freeze frame data can be cleared using the scan tool.

  3. M-OBD (w/o Canister Pump Module)


    1. When troubleshooting a Multiplex On-Board Diagnostic (M-OBD) vehicles, the vehicle must be connected to the GTS. Various data output from the ECM can then be read.

    2. B000UCB

      OBD regulations require that the vehicle 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 stored in the ECM memory. If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain stored in the ECM memory.

  4. 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 problems (GTS only).

  5. 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).

  6. 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. B000WA6E24
      *1 DTC was stored
      *2 0.5 sec.
      *3 Freeze frame data which can be read

      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.

  7. CHECK DATA LINK CONNECTOR 3 (DLC3)


    1. Check the DLC3.

      Click here

  8. CHECK BATTERY VOLTAGE

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

  9. CHECK MIL


    1. Check that the MIL illuminates when the engine switch is turned on (IG).

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

      w/ Canister Pump Module:

      Click here

      w/o Canister Pump Module:

      Click here

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