Deck 6: Tire Pressure Monitoring Systems

Question 1

Technician A says that underinflated tires reduce fuel economy. Technician B says that underinflated tires are unsafe and cause accelerated tire wear. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Answer 1

C

Question 2

Tech A says that a TPMS system can save fuel over time. Tech B says that a TPMS will help prevent blowouts. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Answer 2

C

Question 3

Tech A says that the use of nitrogen to fill a tire will prevent the tire from blowing out. Tech B says that when mounting or dismounting a tire on a wheel with a TPMS sensor, you need to position the wheel/tire properly on the tire machine or the TPMS sensor can be easily broken. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Answer 3

B

Question 4

Technician A says some tire pressure monitoring systems have a sensor mounted in each wheel rim. Technician B says some tire pressure monitoring systems use the wheel speed sensors in the ABS system to detect tire pressure. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 5

The air pressure on a vehicle with TPMS is supposed to be 35 psi. Technician A says that one some vehicles, a 5 psi drop below 35 psi will cause the TPMS light to illuminate. Technician B says that on other vehicles, a 2 psi will cause the light to illuminate. Who is correct?

A) Tech A
B) Tech B
C) Both Techs A and B
D) Neither Tech A nor B

Question 6

Vehicles that are 2008 model year and newer are required to be equipped with a ________, designed to monitor the pressures in each individual tire and alert the driver of a problem if a tire pressure is outside of the specified limits.

A) TPMS
B) ECM
C) ECG
D) MIL

Question 7

There are two basic configurations used to monitor the vehicle's tire pressures: ________ and ________.

A) Flat; rough
B) Direct; indirect
C) High; low
D) High band; low band

Question 8

The use of a(n) ________ in the sensor allows the sensor to go to sleep when the vehicle stops, which extends battery life.

A) Pressure switch
B) Battery switch
C) Ignition switch
D) Centrifugal switch

Question 9

If the TPMS warning light indicates a system fault, connect an appropriate scan tool to the system and read any ________.

A) ECRs
B) MILs
C) DTCs
D) EGRs

Question 10

The ________ monitors the tires for low air pressure and alerts the driver when one or more tires are lower than (or in some cases, higher than) the designated thresholds.

A) Pressure differential valve
B) Supplemental restraint system (SRS)
C) Tire pressure monitoring system (TPMS)
D) Pressure relief valve

Question 11

Many TPMS sensors use ________-plated valve cores in an aluminum valve stem.

A) Brass
B) Aluminum
C) Nickel
D) Copper

Question 12

TPMS sensor batteries are designed to last for _______ years without replacement.

A) 1-3
B) 2-4
C) 5-10
D) Over 10

Question 13

Many TPMS valve stems have valve cores with ________ threads and should not be replaced with ________ threads.

A) Coated; cross
B) Cross; coated
C) Noncoated; cross
D) Coated; noncoated

Question 14

________ valve stems may be made as part of the valve stem or may screw onto, or snap into, the valve stem, which is replaceable.

A) Rubber press-fit
B) Screw-in
C) TPMS-integrated
D) Brass fitted

Question 15

The sensors in the ________ provide information to a steering control module for electric power steering assist or for the electronic stability control system.

A) Steering arm
B) Steering linkage
C) Steering spring
D) Steering column

Question 16

The steering column of a vehicle with EPS or stability control will be equipped with a _______.

A) Motion sensor
B) Steering angle sensor
C) Both A and B
D) Neither A nor B

Question 17

All of the following statements about a tire pressure monitoring system are true, EXCEPT:

A) it is often referred to as a TPMS.
B) it uses a warning light as a driver warning.
C) it can be diagnosed with an appropriate scan tool.
D) it can automatically stop a leak in a tire.

Question 18

Technician A says that TPMS sensors that are fastened to the inner end of the valve stem are called direct sensors. Technician B says an indirect TPMS system does not use pressure sensors. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B

Question 19

Technician A says that dismounting and mounting a tire is the same process on all modern wheels. Technician B says that the tire pressure monitoring system has changed mounting and dismounting procedures on some vehicles equipped with TPMS. Who is correct?

A) Technician A
B) Technician B
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B

Question 20

Technician A says a loose tie rod end is ok when aligning a car. Technician B says that recalibrating the steering angle sensor is needed on most recent vehicles. Who is correct?

A) Technician A
B) Technician B
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B

Question 21

All of the following statements about a TPMS system are true, EXCEPT:

A) It is designed to increase safety.
B) It monitors the tires for low air pressure.
C) It can be fitted to all vehicles using conventional and run-flat tires.
D) It signals normal pressure variations caused by changes in ambient temperature.

Question 22

The National Highway Traffic Safety Administration requires the TPMS to notify the driver when any tire is:

A) 15% below recommended pressure on the placard.
B) 25% below recommended pressure on the placard.
C) 35% below recommended pressure on the placard.
D) 45% below recommended pressure on the placard.

Question 23

Which piece of U.S. legislation is responsible for the TPMS?

A) Clean Air Act
B) TREAD Act
C) National Traffic and Motor Vehicle Safety Act of 1966
D) Executive order of the president

Question 24

All vehicles must comply with the TREAD Act, except:

A) Motorcycles.
B) 20% of all models from October 2005 to August 2006.
C) 70% of all models from September 2006 to August 2007.
D) 100% of all models after September 2007.

Question 25

Two technicians are describing the operation of the TPMS. Tech A says that the TPMS is a mechanical system used to monitor the air pressure inside a pneumatic tire. Tech B says that the TPMS is also referred to as remote tire pressure monitoring systems (RTPMS) or simply as run-flat
Indicators. Who is right?

A) Tech A only
B) Tech B only
C) Both A and B
D) Neither A nor B

Question 26

Where do you find the most accurate tire pressure specifications for TPMS operation?

A) Placard on door jam
B) Tire sidewall
C) Coded in the VIN (vehicle identification number)
D) TPMS sensor readout on the scan tool

Question 27

A TPMS monitors the tires for low air pressure and alerts the driver when one or more tires are lower than (or in some cases higher than) required by doing which of these?

A) Turning on the MIL (malfunction indicator lamp)
B) Turning on the yellow low-pressure indicator light
C) Disabling the ignition
D) Sounding a warning buzzer

Question 28

All of the following statements about indirect TPMS are true, EXCEPT:

A) It operates on the principle that an under-inflated tire has a slightly smaller diameter than a correctly inflated tire.
B) It can detect under-inflation in up to three tires at the same time.
C) It measures the air pressure indirectly by monitoring individual wheel speeds.
D) It is more expensive when compared to other types of TPMS.

Question 29

Tech A says the direct TPMS measures tire pressure, sometimes via a sensor that is installed inside each wheel. Tech B says the indirect TPMS measures the air pressure indirectly by monitoring individual wheel speeds and other signals available in the vehicle using the ABS (antilock brake system) wheel speed sensors. Who is right?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 30

How is the indirect TPMS system reset?

A) Pressing the calibration button
B) Re-learning the sensor position
C) Clearing the codes
D) Reducing the air pressure

Question 31

The pressure sensors:

A) transmit using UV rays technology.
B) transmit information on the volume of air in the tires.
C) can be used to display real-time tire pressures.
D) are usually battery-less.

Question 32

The mode of sensor operation where a very fast change in inflation pressure is detected and inflation pressure is sent to the control module approximately once a second is:

A) active mode.
B) sleep mode.
C) alert mode.
D) control mode.

Question 33

The TPMS sensor that sends a signal to the receiver when exposed to a powerful electromagnetic force is the:

A) continuous wave sensor.
B) magnetically triggered sensor.
C) pulse-width-modulated sensor.
D) PWM sensor.

Question 34

The valve stem-mounted sensor uses the valve stem as which of these?

A) Receiver
B) Memory
C) Operator
D) Transmitter

Question 35

Tech A says that the banded sensor is installed in the drop well of the wheel inside the tire and banded or clamped around the drop well of the wheel. Tech B says that the TPMS pressure sensor uses a lithium-ion battery. Who is right?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 36

A special tool that is used to reset the sensors when rotating the tires is the:

A) centrifugal switch.
B) magnetic tool.
C) scan tool.
D) TPMS tester.

Question 37

The __________ measures the air pressure in a tire by monitoring wheel speeds.

A) direct system
B) indirect system
C) pressure sensor
D) PWM sensor

Question 38

Technician A says that there are two different types of direct tire pressure monitor sensors. Technician B says that some direct tire pressure sensors can receive and send signals to the TPMS control unit. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 39

Technician A says that you do not need to be concerned about damaging a TPMS sensor if servicing a tire/wheel assembly. Technician B says that some sensors are attached to the valve stem while others are clamped into position in the wheels drop center. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 40

TPMS sensors can be mounted by which of the following methods?

A) Valve stem mounted
B) Glue mounted
C) Banded
D) Both A and C