310S Electrical and Electronic Systems 2

Question 1

What is the purpose of the CAN bus (Controller Area Network) in modern vehicles?

Accepted Answer

To allow multiple control modules to communicate over a shared data network

Answer

To supply power to all control modules

Answer

To control the air conditioning system only

Answer

To connect the vehicle to the internet

Question 2

When testing a Hall-effect sensor, what type of signal output should a technician expect?

Accepted Answer

A digital square wave signal switching between high and low voltage

Answer

A sinusoidal (AC) wave signal

Answer

A steady DC voltage that varies with temperature

Answer

A pulsed DC signal with varying frequency and amplitude

Question 3

What does a parasitic draw test measure?

Accepted Answer

Current flowing from the battery when the vehicle is off and all systems are in sleep mode

Answer

Current consumed by the starter motor during cranking

Answer

The resistance of the battery cables

Answer

Alternator output under full load

Question 4

What is the correct way to test a vehicle's ground circuit?

Accepted Answer

Perform a voltage drop test between the component ground and the battery negative terminal

Answer

Measure resistance with an ohmmeter while the circuit is energized

Answer

Check for voltage at the ground terminal with the circuit off

Answer

Visually inspect the ground wire only

Question 5

A vehicle's headlights dim significantly when the power windows are operated. What is the most likely cause?

Accepted Answer

A weak battery or poor charging system output

Answer

A faulty headlight switch

Answer

Normal operation for all vehicles

Answer

A short circuit in the window motor

Question 6

What is the function of the body control module (BCM)?

Accepted Answer

To manage body electrical functions such as lighting, wipers, door locks, and security

Answer

To control engine performance and emissions

Answer

To operate the transmission shift solenoids

Answer

To monitor tire pressure sensors