Level 3 LV07 (Engines)

Front

What is a typical diesel idle pressure?

Back

3500 - 4000 PSI

Front

The mass air flow sensor contains a module that heats a wire. What happens to the wires temperature and resistance when air flows over said wire?

Back

Both decrease

Front

what is the throttle body Assembly position measured by

Back

potentiometer

Front

What is pulse width modulation?

Back

The period the injector is open

Front

How would you test the fuel rail delivery line when you receive a open loop on the multimeter? Options: set the multimeter to 12 volts and test it as is, isolate the fuel rail and start measuring from the start of the rail to the end of the fuel system until you get a reading, run a continuity test on the wires from the fuel pump, replace with a new fuel rail.

Back

isolate the fuel rail and start measuring from the start of the rail to the end of the fuel system until you get a reading

Front

What happens if injectors are not coded?

Back

Non start

Front

Which one of the following components is located on the 'high pressure' side of the diesel fuel injection system? Fuel pump, Fuel tank, Common Rail, Fuel filter

Back

Common Rail

Front

What is the 3rd step you would do when your fuel pump is not engaging?

Back

do a pressure system check

Front

What controls the opening and closing of the fuel injector in an electronically controlled fuel injection system?

Back

It is controlled by electrical signals from the ECU

Front

What is the first test that can be done when diagnosing a faulty fuel pump?

Back

Listen for the pump when power is on