Deck 21: Instrumentation and Information Displays

Question 1

Analog gauges use digital displays of numbers.

Answer 1

False

Question 2

The sending unit for the engine coolant temperature gauge is typically an NTC thermistor.

Answer 2

True

Question 3

An oil pressure sending unit may be called a piezoresistive sensor.

Answer 3

True

Question 4

The indicator needle on a speedometer is held to the zero position by ______.

A)magnetic force
B)the weight of the needle
C)the speedometer cable
D)a hairspring

Question 5

Most digital speedometers have a speed limit. If the vehicle exceeds the speed value, the speedometer continues to display the top of its range.

Question 6

None of the gauges work on a vehicle. Technician A says the connection to the instrument cluster may be open. Technician B says the cluster's IVR may be open. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 7

Which of the following is NOT a type of gauge design?

A)thermal
B)balancing coil
C)variable resistance
D)bimetallic

Question 8

Electronic odometer display readings are stored in the computer's RAM.

Question 9

LCDs are usually red, white, or green.

Question 10

A mechanical odometer is typically driven by the speedometer drive cable and a set of gears.

Question 11

All the following are used as digital electronic displays EXCEPT:

A)light-emitting diode
B)liquid crystal diode
C)incandescent
D)vacuum fluorescent

Question 12

A universal gauge checker can be used to check the operation of the ______.

A)gauge unit
B)instrument voltage regulator
C)both A and B
D)neither A nor B

Question 13

When the fluid level in a washer reservoir is low, the fluid level switch opens and the low washer level indicator lamp illuminates.

Question 14

A digital speedometer constantly reads zero mph. Technician A says the problem may be the vehicle speed sensor. Technician B says the problem may be the throttle position sensor. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 15

Technician A says the low fuel warning indicator light is turned on when the fuel level drops below one-eighth of the tank capacity. Technician B says the fuel gauge sending unit is normally combined with the electric fuel pump. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 16

Most tachometers operate from a cable driven by the engine's distributor or camshaft.

Question 17

The oil pressure light stays on whenever the engine is running. The oil pressure has been checked and it meets specifications. Technician A says a short to ground in the circuit between the indicator light and the pressure switch could be the cause. Technician B says an open in the pressure switch could be the cause. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 18

An engine coolant temperature sending unit may be called a piezoresistive sensor.

Question 19

The oil change maintenance reminder on a Honda is automatically reset by a switch contact in the oil filter housing that is tripped whenever the oil filter is removed.

Question 20

On most new vehicles, the action of an ECT (engine coolant temperature)sensor can be monitored on a scan tool.

Question 21

Technician A says the vehicle speed sensor used with an electronic speedometer is typically mounted near one of the vehicle drive wheels. Technician B says a cable-driven speedometer unit depends upon magnetism to move the needle. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 22

Technician A says that the brake pad warning indicator light is triggered by a switch on the back of the brake pedal. Technician B says the brake pad warning indicator is triggered by a switch on the master cylinder. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 23

A(n)_____ coil is installed in the IVR power lead to prevent radio interference caused by pulsations of the IVR.

A)choke
B)solenoid
C)ignition
D)damper

Question 24

The stop light (brake light)checker uses a _____ to sense when a brake light bulb is burned out.

A)thermistor
B)photo diode
C)voltage stabilizer
D)reed switch and magnetic coils

Question 25

Technician A says an oil pressure sending unit may be tested with an ohmmeter. Technician B says an engine coolant temperature sending unit may be tested with an ohmmeter. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 26

Technician A says most digital temperature gauges are bar-type displays. The number of illuminated bars varies according to the current flow from the sending unit. Technician B says some warning lights are triggered by the PCM and BCM. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 27

The vehicle speed sensor (VSS)for an electronic speedometer on an RWD vehicle is typically mounted _____.

A)on the right front wheel hub
B)on the left front wheel hub
C)on the right rear axle hub
D)on the transmission output shaft

Question 28

The park distance control system warns the driver that the vehicle is close to an obstacle by _____.

A)an audible signal that increases in frequency as the vehicle gets closer
B)the ABS system automatically applying the brakes when the vehicle gets too close
C)both A and B
D)neither A nor B

Question 29

All the following are items to be checked in gauge systems EXCEPT:

A)sender units
B)detector switches
C)IVR
D)gauges

Question 30

Park distance control systems are being discussed. Technician A says that as the distance between the vehicle and an object becomes closer, the intervals between the warning tones become longer. Technician B says that some systems have both visual and audible warnings. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 31

Which of the following is NOT displayed on the Toyota hybrid multifunction display panel?

A)direction and path of energy flow
B)voltage of HV battery pack
C)fuel consumption (MPG)
D)amount of recovered energy

Question 32

Which of the following is NOT connected to the tone generator?

A)headlight switch
B)ignition key switch
C)seat belt switch
D)park/neutral safety switch

Question 33

Which of the following is NOT a component of an analog gauge system?

A)thermoelectric gauge
B)sending unit
C)light-emitting diode
D)instrument voltage regulator

Question 34

Fuel range, ETA (estimated time of arrival), fuel economy and distance to destination are common types of data that are displayed on the _____.

A)BCM (body control module)
B)driver information center
C)heads-up display
D)All the answers are correct.

Question 35

The internal combustion engine in a hybrid does not normally run when the vehicle is at a standstill. What alerts the driver that the vehicle is capable of being driven?

A)the Ready light
B)the Hybrid System On light
C)the Electric Drive Enabled light
D)the Drive light

Question 36

Tire pressure monitor systems are being discussed. Technician A says that when the indicator light is yellow, the pressure in one of the vehicle's tires is below minimum. Technician B says that when the indicator is red, the tire pressure is excessively low or almost flat. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 37

In an NTC-type thermistor, when the temperature is high, the resistance is ______.

A)zero
B)low
C)high
D)unknown

Question 38

Technician A uses a universal gauge tester to diagnose gauge problems. Technician B uses a scan tool to test the ECT (engine coolant temperature)sensor. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 39

An NTC thermistor is used in a(n)_____.

A)oil pressure sending unit
B)engine coolant temperature sensor
C)fuel gauge sending unit
D)all answers are correct

Question 40

Which of the following is not a type of digital display?

A)LED (light-emitting diode)
B)LCD (liquid crystal diode)
C)balancing coil
D)vacuum fluorescent

Question 41

The ____________________ is the simplest type of magnetic gauge.

Question 42

What is the difference between a warning light and an indicator light?

Question 43

What basic devices should be checked while diagnosing gauge/indicator failures?

Question 44

What is meant by ISO symbols?

Question 45

The two types of electrical analog gauges are magnetic and ____________________.

Question 46

The correct term for a modern dashboard is ____________________.

Question 47

What is a HUD system and how does it work?

Question 48

All electrical gauges require an input from either a ____________________ or sensor.

Question 49

A heads-up display projects visual images on the ____________________.

Question 50

The ____________________ gauge indicates engine speed (RPM).

Question 51

Information on the operation of the Toyota hybrid system is displayed on the ____________________ located in the center of the dash.

Question 52

Identify at least four causes of intermittent electrical/electronic problems.

Question 53

In some fuel gauge systems, a ____________________ module is used to reduce gauge fluctuation caused by fuel sloshing in the tank.

Question 54

Describe how a fuel level sending unit operates.

Question 55

The resistance value of an NTC thermistor ____________________ as temperature increases.

Question 56

What tools are needed to check the operation of a fuel gauge sending unit?

Question 57

What is the function of an IVR (instrument voltage regulator)?