Homework Quiz

The ECM ________________the engine from damage during extreme operating conditions or from further damage when an essential engine component fails.

• The ECM controls the radio system in the vehicle.
• The ECM is responsible for adjusting the air conditioning settings.
• The ECM regulates the tire pressure in the vehicle.
• The ECM monitors engine parameters and adjusts settings to protect the engine.

There are what two levels of engine protection?

• Primary protection and tertiary protection
• Main protection and backup protection
• First protection and second protection
• Primary protection and secondary protection

Specifically, the ECM records::

• Engine operation, performance, and efficiency data
• Transmission fluid levels
• Windshield wiper usage
• Tire pressure readings

Two levels of warning lamps indicate faults. _________lamps indicate a warning. _______ lamps indicate that the vehicle must stop.

• Blue
• Red, Amber
• Yellow, Red

• Green

Engine torque can be limited by the ECM. This function is referred to as ___________ ______________________.

• power restriction
• torque control
• speed governing
• engine derating

Forced shutoff protects the vehicle from _____________ ______________.

• potential speed

• impending doom

• likely internment

• serious errors

If the engine has been forced to shut down due to an active engine protection function, the driver can power down the ECM for ______seconds to reset the _____-second delay.

• 5, 35
• 15, 25
• 20, 40
• 10, 30

The Idle cool down feature protects the engine when the ______________temperature is high

• radiator
• oil
• transmission
• exhaust

DL1 (J1939-1) is electrically terminated at each end with a _____________. Each DL1 (J1939-1) network has two _________________.

• resistor, resistors

• fuse, switches
• inductor, relays
• capacitor, connectors

The correct number of resistors can be checked by measuring the resistance across the DL1 (J1939-1) circuit at the 16-pin diagnostic connector. The correct resistance is ____-_____ ohms. When tested individually, each resistor must have a resistance of ______-______ ohms. Data link 2 ISO (International Organization for Standardizatio

• 50-70 ohms

  110-130 ohms

• 40-80 ohms

  80-160 ohms

• 100-200 ohms

  40-80 ohms

• 60-120 ohms

  80-160 ohms