CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM DIAGNOSIS SYSTEM


  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. A001WPO

      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 any of the following:


      • 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 reoccur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain stored in the ECM memory.

    3. To check for 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.

      Click here

  2. M-OBD (EXCEPT EUROPEAN SPEC.)


    1. When troubleshooting 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. A001YBE

      OBD regulations require that the vehicle's onboard computer illuminate the MIL on the instrument panel when the computer detects a malfunction in any of the following:


      • The emission control system/components

      • The power train 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 goes off automatically but the DTCs remain recorded in the ECM memory.

  3. 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 to technicians as an option. In check mode, 1 trip detection logic is used when reproducing malfunction symptoms for increasing the ability of the system to detect malfunctions, including intermittent malfunctions.

  4. 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).

  5. 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.

    2. A001VYOE08
      *1 DTC is stored
      *2 0.5 sec.
      *3 Freeze frame data which can be read

      The GTS displays freeze frame data recorded at five different points: 1) 3 times before the DTC is stored, 2) once when the DTC is stored, and 3) once after the DTC is stored. The data can be used to reproduce the vehicle condition around the time of the malfunction. The data may be helpful in determining the cause of a malfunction. It may also be helpful in determining whether a DTC is being caused by a temporary malfunction.

  6. LIST OF FREEZE FRAME DATA


    Powertrain > Transmission
    Tester Display
    Vehicle Speed
    Engine Speed
    Calculate Load
    Coolant Temperature
    Intake Air Temperature
    Engine Run Time
    Battery Voltage
    BATT Voltage
    Throttle Position Sensor No.1 Voltage %
    Starter SW
    Neutral Position SW
    Stop Light SW
    Cruise Main SW
    TC Terminal
    Running Time from MIL ON
    Time after DTC Cleared
    Distance from DTC Cleared
    Warmup Cycle Cleared DTC
    Total Distance Traveled
    Total Distance Traveled
    Accel Position from EFI
    NT Sensor Speed
    NIN Sensor Speed
    NOUT Sensor Speed
    NOUT Sensor Voltage
    Belt Clamping Force Sensor
    Shift SW Status (P Range)
    Shift SW Status (R Range)
    Shift SW Status (N Range)
    Shift SW Status (N,P Range)
    Shift SW Status (S Range)
    Shift SW Status (D Range)
    A/T Oil Temperature No.1
    ATF Thermal Degradation Estimate
    CVT Oil Press Calibration
    NT Sensor Voltage
    Lock Up Status
    CVT Shift Status Ratio
    Solenoid (SLU)
    Solenoid (SLS) High/Low
    Solenoid (SLS) MAX/MIN
    Solenoid (SLP)
    Solenoid (SL)
    Solenoid (SC)

  7. DATA LINK CONNECTOR 3 (DLC3)


    1. Check the DLC3.

      Click here

  8. BATTERY VOLTAGE

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

  9. 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.