Engine Management System Quiz

What is the primary function of the Engine Control Unit (ECU) in an engine management system?

• To control the air conditioning system

• To manage the fuel injection and ignition timing

• To operate the vehicle's lighting system

• To adjust the seat positions

What role does the computer in an EMS play regarding input data?

• It ignores input data

• It monitors input data from sensors and makes decisions to operate output actuators

• It only stores input data

• It only displays input data

What does the acronym ECU stand for in the context of engine management systems?

• Engine Control Unit

• Electronic Control Unit

• Engine Communication Unit

• Electronic Communication Unit

Which component is used to control the flow of exhaust gases back into the engine?

• EGR valve

• Fuel injector

• Canister purge valve

• Idle actuator

How does the central processing unit (CPU) in an ECU determine when to send a signal to the output circuit?

• By comparing input data values against pre-programmed data values stored in memory.

• By transforming signals from sensors.

• By powering the ECU.

• By storing data values.

Two technicians are discussing engine management systems. Technician A says the electronic control unit can also be called the powertrain control module or the electronic control module. Technician B says the electronic control unit contains three main circuits to control an engine management system. Who is correct?

• Technician A only

• Technician B only

• Both technician A and technician B

• Neither technician A nor technician B

What materials are typically used to manufacture the case of an ECU?

• Wood or glass

• Metal or hard plastic

• Rubber or fabric

• Ceramic or paper

Where is the ECU typically mounted in a vehicle?

• On the roof

• Under the dashboard or on the bulkhead

• Inside the glove compartment

• In the trunk

What does the throttle position sensor (TPS) monitor?

• The position of the throttle plate

• The mass of air entering the engine

• The amount of oxygen in the exhaust gases

• The temperature of the engine

Which sensor monitors the position of the crankshaft and engine RPM?

• ECT sensor

• CKP sensor

• CMP sensor

• ECU sensor