Heavy Duty Truck Systems - Chapter 31
Graded A+
What is the purpose of a truck's onboard diagnostic system?
The onboard diagnostic system monitors vehicle performance and detects any faults or
malfunctions in the truck’s systems.
How does a truck’s electronic control module (ECM) co...
Heavy Duty Truck Systems - Chapter 31
Graded A+
What is the purpose of a truck's onboard diagnostic system?
✔✔ The onboard diagnostic system monitors vehicle performance and detects any faults or
malfunctions in the truck’s systems.
How does a truck’s electronic control module (ECM) contribute to engine management?
✔✔ The ECM controls engine functions such as fuel injection, ignition timing, and emissions
based on sensor inputs to optimize performance and efficiency.
What is the function of a truck’s turbocharger in the context of engine performance?
✔✔ The turbocharger increases engine power by forcing more air into the combustion chamber,
which allows for more fuel to be burned and improves overall engine efficiency.
How can you determine if a truck’s air suspension system needs maintenance?
✔✔ Signs that the air suspension system needs maintenance include uneven ride height, a rough
ride, or unusual noises coming from the suspension components.
1
, What does the term 'ABS' stand for in truck braking systems, and what is its function?
✔✔ ABS stands for Anti-lock Braking System, which prevents wheel lock-up during hard
braking to maintain steering control and reduce stopping distances.
How does the truck’s air conditioning system maintain optimal cabin temperature?
✔✔ The air conditioning system uses refrigerant to absorb heat from the cabin air and expel it
outside, thus cooling and maintaining a comfortable interior temperature.
What role does the truck's alternator play in the electrical system?
✔✔ The alternator charges the battery and supplies electrical power to the truck’s electrical
components while the engine is running.
How does the truck’s fuel management system help in reducing emissions?
✔✔ The fuel management system optimizes the fuel-air mixture and controls fuel injection to
ensure efficient combustion and minimize emissions.
What is the importance of regular diagnostics for a truck's drivetrain system?
✔✔ Regular diagnostics help identify and address issues early, preventing potential breakdowns
and ensuring the drivetrain system operates smoothly and efficiently.
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