MULTI-MODE MANUAL TRANSAXLE SYSTEM DIAGNOSIS SYSTEM


  1. DESCRIPTION

    A013674E01

    • The transmission control ECU has a self-diagnosis system. If the ECU, the multi-mode manual transmission system or any components operate incorrectly, the ECU detects the malfunction, and illuminates the multi-mode manual transmission warning light on the combination meter.

      The multi-mode manual transmission warning light is illuminated when the multi-mode manual transmission system malfunctions.

    • A01385UE05

      When troubleshooting Euro-OBD vehicles, the only difference from the usual troubleshooting procedure is that an OBD scan tool (complying with ISO 15031-4) or an intelligent tester is connected to the vehicle, and various data output from the vehicle ECU is read.

    • Euro-OBD regulations require that the vehicle's on board computer illuminates the MIL (Malfunction Indicator Lamp) on the combination meter when the ECM (Engine Control Module) detects a malfunction in: 1) the emission control systems and components, or 2) the powertrain control components (which affect vehicle emissions), or 3) the ECM. Therefore, the transmission control ECU illuminates the MIL and multi-mode manual transmission warning light together if malfunctions related to these systems or components are detected.

    • If the malfunction does not recur for 3 consecutive trips, the MIL goes out automatically. However, the DTCs remain recorded in the transmission control ECU memory.

    • A0136XRE01

      To check DTCs, connect the OBD scan tool or intelligent tester to the DLC3 (Data Link Connector 3) on the vehicle. The OBD scan tool or intelligent tester also enables the DTCs to be erased and the freeze frame data and various forms of engine data to be checked. See the instruction manual of the OBD scan tool or intelligent tester for details.

    • The DTCs include ISO controlled codes and manufacturer controlled codes. ISO controlled codes must be set as prescribed by the ISO, while manufacturer controlled codes can be set by the manufacturer within prescribed limits Click here.

  2. FREEZE FRAME DATA


    • Freeze frame data record the vehicle conditions (engine speed, vehicle speed, transmission gear position, shift position, etc.) when malfunctions are detected. When troubleshooting, the freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, the transmission gear was in neutral or not, and other data, from the time the malfunction occurred.

  3. DLC3 (Data Link Connector 3)


    • A0136KQE61

      The transmission control ECU uses the ISO 9141-2 (Euro-OBD) communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 9141-2 format.

    Symbol Terminal No. Name Reference terminal Result Condition
    SIL 7 Bus "+" line 5-Signal ground Pulse generation During transmission
    CG 4 Chassis ground Body ground 1 Ω or less Always
    SG 5 Signal ground Body ground 1 Ω or less Always
    BAT 16 Battery positive Body ground 9 to 14 V Always

    Tech Tips

    The DLC3 is the interface prepared for reading various data from the vehicle's ECU. After connecting the cable of an intelligent tester or OBD scan tool, turn the ignition switch to ON and turn the tester or scan tool ON.

    If a communication failure message is displayed on the tester or scan tool screen (on the tester: no information available), a problem exists in either the vehicle or tester. In order to identify the location of the problem, connect the tester to another vehicle.

    If communication is normal: Inspect the DLC3 on the original vehicle.

    If communication is impossible: The problem is probably with the tester itself. Consult the service department listed in the instruction manual.

  4. CHECK MULTI-MODE MANUAL TRANSMISSION WARNING LIGHT


    1. A013674E01

      Turn the ignition switch to ON.

    2. Check that the warning light illuminates for 5 seconds. If the warning light does not illuminate, proceed to troubleshooting the multi-mode manual transmission warning light circuit Click here.

  5. BATTERY VOLTAGE


    1. Measure the voltage of the battery.

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

    2. Inspect the battery, fuses, fusible links, wiring harness, connectors and ground.