TPMS

What is the purpose of the TPMS system?

• To detect a tire that has low inflation pressure

• To inflate a low tire if needed

• To flash a warning light if a tire with low inflation pressure is detected

• All of the above

Technician A says that tire pressure will drop 1 PSI for every 10 degrees drop in temperature. Technician B says that the two type of TPMS pressure sensors are snap-in and clamp-in. Which technician is correct?

• Tech A

• Tech B

• Both Tech A and Tech B

• Neither Tech A nor Tech B

The FMVSS 138 law (TREAD Act) requires that the driver be notified if the tire inflation pressure drops how much?

• 30%

• 25%

• 20%

• 15%

Two technicians are discussing the indirect tire-pressure monitoring system. Technician A says that it was used by some vehicle manufacturers. Technician B says that it uses the speeds of the RF and LR tires and compares the rotating speeds of the LF and RR tires to detect a low tire. Which technician is correct?

• Tech A

• Tech B

• Both Tech A and Tech B

• Neither Tech A nor Tech B

What mode does a direct pressure sensor enter when the vehicle is stopped?

• Sleep mode

• Storage mode

• Alert mode

• Active mode

What type of valve core is used in stem-mounted sensors?

• Brass

• Nickel-plated

• Steel

• Aluminum

The tire pressure sensor sends a signal to the ________.

• door module

• RKE receiver

• BCM

• any of these, depending on the vehicle

What does the “delta pressure method” mean?

• Change the inflation pressure    

• Activate the sensor so it broadcasts the pressure to the scan tool

• Inflating the tire to the specified pressure

• Using a handheld tester to read the pressure as reported by the sensor

When a TPMS sensor needs replacement, which of the following is NOT an option?

• Replace with an OE sensor

• Replace with a programmable aftermarket sensor

• Replace the sensor battery and program it to the vehicle    

• Replace with a multiple protocol sensor

To activate or learn a direct pressure sensor, what does the service technician need to do?

• Enter learn mode and use a magnet

• Enter learn mode and decrease inflation pressure

• Use a handheld tester

• Any of the above depending on the vehicle and system