СИСТЕМА SFI > СИСТЕМА ДИАГНОСТИКИ

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EURO-OBD
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.
Euro-OBD regulations require that the vehicle's on-board computer illuminates the Malfunction Indicator Lamp (MIL) on the instrument panel when the computer detects a malfunction in:
FI02547E03

  1. The emission control system/components

  2. The powertrain control components (which affect vehicle emissions)



    3. B151886E02

  3. 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 reoccur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain recorded in the ECM memory.
    To check DTCs, connect the intelligent tester 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 the engine data.
    The DTCs and freeze frame data can be erased with the scan tool (see page Нажмите здесь).


NORMAL MODE AND CHECK MODE
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 detected malfunctions, including intermittent malfunctions (intelligent tester only).

2-TRIP DETECTION LOGIC
When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory (1st trip). If the same malfunction is detected again after the engine switch is turned off and then on (IG), the MIL will illuminated (2nd trip).

ДАННЫЕ ФИКСИРОВАННОГО НАБОРА ПАРАМЕТРОВ
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 running or stopped, 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.

DLC3 (Data Link Connector 3)
Refer to INTRODUCTION (see page Нажмите здесь).

INSPECT BATTERY VOLTAGE
If voltage is below 11 V, replace the battery before proceeding to the next step.

Battery Voltage:
11 to 14 V


CHECK MIL

  1. Check that the MIL illuminates when turning the engine switch on (IG).
    If the MIL does not illuminate, there is a problem in the MIL circuit [refer to MIL CIRCUIT (see page Нажмите здесь)].

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


ALL READINESS
For this vehicle, using the intelligent tester allows readiness codes corresponding to all DTCs read. When diagnosis (normal or malfunctioning) has complete, readiness codes are set.