Engine Management L1 - Day 1

Select all that apply. Which of the following are engine management inputs?

• Engine Coolant Temperature Sensor (G62)

• RPM Sensor (G28)

• Turbo Recirculation Valve (N249)

• Knock Sensor (G61)

What is a PTC sensor?

• A variable resistor which decreases its resistance as temperature increases

• A variable resistor which increases its resistance as temperature increases

• Any solenoid that has a ground signal

• Any sensor that uses a positive potential for signal

What is the difference between gauge pressure and absolute pressure?

• Gauge uses PSI, absolute uses BAR

• Absolute is more accurate by using millionths

• They use different zero points

• Gauge measures much higher ranges than absolute

If a static fuel pressure test is within specification, there cannot be a restriction causing low fuel delivery volume.

• True

• False

How does the fuel pump control module (J538) control the fuel transfer pump (G6)?

• An analog signal

• Pulse Width Modulation

• A variable frequency sine wave

• Square waves that change amplitude

What important basic check should be performed prior to other fuel system tests?

• A fuel buoyancy test

• A compression test

• An injector leak test

• A fuel quality test

What is a digital signal?

• Any signal that has 256 states (0-255)

• Any signal that instantly rises and instantly falls between its voltage states.

• All electrical sensor signals

• All position sensors

Select all that apply. Which of the following are engine management outputs?

• Camshaft Actuator (N205)

• Wastegate Bypass Regulator Valve (N75)

• Charge Air Pressure Sensor (G31)

• Fuel Transfer Pump (G6)

Which test may damage a contactless potentiometer?

• Any DVOM measurement

• Inductive current measurements

• Resistance measurements

• Viewing Measured Value Blocks

When using the DSO in ODIS, Auto is used for ______ signals, and Writer is used for ______ signals.

• slow, fast

• digital, digilog

• analog, voltage

• fast, slow