752 Mid Term Prep

An IAT is being tested. After the vehicle has been allowed to cool for several hours, a scan tool is used to observe the IAT sensor reading. When compared to the engine coolant temperature (ECT), the two temperatures should be within how many degrees F of each other:

• 5

• 10

• 20

• 15

What unit of electricity is used as a signal for a computer?

• Amperage

• Voltage

• Ohms of Resistance

• Wattage

When testing an ECT sensor on a vehicle, a digital multimeter can be used and the signal wire back probed. What setting should the technician use to test the sensor?

• AC Volts

• DC Amperes

• DC Volts

• Ohms of Resistance

The SAE term for the vehicle computer is ________.

• ECU

• PCM

• ECM

• VCM

A TP sensor is being backprobed. The meter reading shows that the technician is measuring ________.

• Signal Voltage

• Ground

• Idle Voltage

• Reference Voltage

Technician A says that all the fuel injectors on an engine should have the same electrical resistance. Technician B says that the difference between any two injectors should be less than 2 ohms. Which technician is correct?

• Technician A

• Technician B

• Technician A and B

• Niether Technician

A freeze-frame is a ________ of all data at the instant an emission-related DTC is set.

• Comprehensive Component Monitor

• Snapshot

• Failure Record

• Trip

Enable criteria means ________.

• The same thing as a trip

• Conditions for a particular test to be performed

• Warm-up Cycle

• Drive Cycle

A pending code is set when a fault is detected on ________.

• A one-trip fault Item

• A thermostat (warm-up) problem

• A catalytic converter efficiency test

• The first fault of a two trip failure

A vehicle has a flashing MIL when warmed up and driving. What does this mean?

• Possible catalytic converter damage

• Fuel Pressure too low

• Low tailpipe flow

• OBD II self-test complete