Description of Parameters, Quick Test of the Fuel Tank System

Description of parameters, quick test of the fuel tank system

Leak diagnostic unit pump
Graphic display in the fuel tank system quick test.
Measurement range 0-400 mA.
The engine control module (ECM) calculates the value from the pump in the leak diagnostic unit.
The value varies depending on the pressure in the fuel tank system. Higher pressure results in increased power consumption.

Battery voltage
Measurement range 0-17.95 V.
The value indicates the voltage from the system relay to the engine control module (ECM).
The voltage must not be below 11 V when the quick test of the fuel tank system is run.

Fuel tank system quick test
In order for the quick test to start, the status of this parameter must be "Not completed".
- Completed = The engine control module (ECM) has completed the quick test / diagnostic of the fuel tank system during the present operating cycle
- Not completed = The engine control module (ECM) has not completed the quick test / diagnostic of the fuel tank system during the present operating cycle.

Test phase
In order for the quick test to start, the status of this parameter must be "Not running".
The parameter indicates the phase of the test.
- Reference= Reference phase for leaks and function test of the leak diagnostic unit is running
- Fuel tank system = Diagnostics for major leak and minor leak running
- Not running = No quick test or diagnostic is running.
For more information about these parameters:
Test phases, quick test fuel tank system, B5254T7 Test Phases, Quick Test Fuel Tank System

ECM-439C
The parameter indicates the result of the diagnostic for leakage in the fuel tank system. This diagnostic is run during the "Fuel tank system" test phase:
- No fault found= No leak corresponding to the definition of major leak detected by the engine control module (ECM)
- Fault found= Leakage ≥ 1.0 mm detected by the engine control module (ECM). Diagnostic Trouble Code (DTC) ECM-439C will be set in the engine control module (ECM).

ECM-434C
The parameter indicates the result of the diagnostic for leakage in the fuel tank system. This diagnostic is run during the "Fuel tank system" test phase.
- No fault found= No leak corresponding to the definition of minor leak detected by the engine control module (ECM)
- Fault found= 1.0 mm > leakage ≥ 0.5 is detected by the engine control module (ECM). Diagnostic Trouble Code (DTC) ECM-434C will be set in the engine control module (ECM).

ECM-4360
The parameter displays the result of the diagnostic for the function in the leak diagnostic unit corresponding to the diagnostic trouble code (DTC) ECM-4360. The diagnostic is run during "Reference" test phase.
- No fault found = No fault is detected by the engine control module (ECM)
- Fault found= Fault in the leak diagnostic unit detected by the engine control module (ECM). Diagnostic Trouble Code (DTC) ECM-4360 will be stored in the engine control module (ECM).

ECM-436B
The parameter displays the result of the diagnostic for the function in the leak diagnostic unit corresponding to the diagnostic trouble code (DTC) ECM-436B. The diagnostic is run during "Reference" test phase.
- No fault found = No fault is detected by the engine control module (ECM)
- Fault found= Fault in the leak diagnostic unit detected by the engine control module (ECM). Diagnostic Trouble Code (DTC) ECM-436B will be stored in the engine control module (ECM).

ECM-436C
The parameter displays the result of the diagnostic for the function in the leak diagnostic unit corresponding to the diagnostic trouble code (DTC) ECM-436C. The diagnostic is run during "Reference" test phase.
- No fault found = No fault is detected by the engine control module (ECM)
- Fault found= Fault in the leak diagnostic unit detected by the engine control module (ECM). Diagnostic Trouble Code (DTC) ECM-436C will be stored in the engine control module (ECM).

ECM-436D
The parameter displays the result of the diagnostic for the function in the leak diagnostic unit corresponding to the diagnostic trouble code (DTC) ECM-436D. The diagnostic is run during "Reference" test phase.
- No fault found = No fault is detected by the engine control module (ECM)
- Fault found= Fault in the leak diagnostic unit detected by the engine control module (ECM). Diagnostic Trouble Code (DTC) ECM-436D will be stored in the engine control module (ECM).