When troubleshooting a Euro-OBD (On-Board Diagnostic) vehicle, an GTS or OBD scan tool must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle's ECM (Engine Control Module) can be then read.
Euro-OBD regulations require that the vehicle's on- board computer illuminates the MIL (Malfunction Indicator Lamp) on the instrument panel when the computer detects a malfunction in:
The emission control system components.
The power train control components (which affect vehicle emissions).
The computer itself. If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs will remain stored in the ECM memory.
To check the DTCs, connect an GTS to the DLC3. 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 (refer to DTC Check/Clear).
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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 during the subsequent drive cycle, the MIL is illuminated (2nd trip).
FREEZE FRAME DATA
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.
DLC3 (Data Link Connector 3) (Click here Нажмите здесь)
INSPECT BATTERY VOLTAGE
|11 to 14 V|
If the voltage is below 11 V, recharge or replace the battery.
The MIL illuminates when the ignition switch is turned to ON and the engine is not running.
If the MIL is not illuminated, check the MIL circuit.
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When the engine is started, the MIL should turn OFF. If the MIL remains ON, the diagnosis system has detected a malfunction or abnormality in the system.
With "All Readiness" you can check whether or not the DTC judgment has been completed by using the GTS.
You should check "All Readiness" after simulating malfunction symptoms or for validation after finishing repairs.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and the GTS on.
Clear the DTCs.Powertrain > Engine and ECT > Clear DTCs
Turn the ignition switch off and wait for 30 seconds.
Perform the DTC judgment driving pattern to run the DTC judgment.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.Powertrain > Engine and ECT > Utility
Input the DTCs to be confirmed.
Check the DTC judgment result.