Chat with AIExam 14: Radio Frequency and Infotainment Systemsservicing Radio Frequency and Infotainment Systems
Describe the methods used by p remium tire pressure monitoring systems to determine tire location.
(85) 
VerifiedBy entering training mode and then, following the specified order of tire location, placing a magnet around the tire's valve stem. As eac h location is learned, the ID is locked to that position.
The use a transponder located behind the wheel splash shields at three locations. Tire position is relearned each time the vehicle is in motion and all four TPSs send periodic signals to the receivi ng module. The receiving module then sends a signal to one of the transponders. This causes the transponder to emit a 125-kHz signal in the area surrounding the wheel. This signal will excite the TPS at that location. Under this condition, the TPS will sen d a constant signal to the receiving module. The receiving module will then identify the TPS and its location. This procedure is repeated for the other two transponder locations.
Locating the tire pressure monitor module in a specific location. The TPS bro adcasts their pressures as described, but also broadcasts the direction of rotation. The module determines tire location by the strength of the signal from the TPS and its rotation direction.
Use the antilock brake systems (ABS) wheel speed sensors to monitor the number of revolutions per mile of the tires. As the tire pressure drops, the diameter of the tire effectively becomes smaller. This results in more revolutions per mile. When compared to the other wheel speed sensors, the system determines a low tire when it sees a wheel speed sensor reading that is higher than the others. Since the ABS system identifies the location of the wheel speed sensors, that data is used to identify the location of the low tire.
In the immobilizer system, the special keys have a(n) ____ under the covering.
(78) VerifiedD
Pressing a button on the FOB will allow operation of the remote keyless entry (RKE) system, which is typically a function of the ____.
(76) VerifiedC
On a vehicle equipped with an immobilizer system, the engine starts for a few seconds and then dies. What is the LEAST likely cause of this?
(84) Like a home Wi-Fi system, the telematics Wi-Fi uses a wireless ___________ to connect to an internet service.
(68) List perceived problems with the remote start feature that are actually normal operation.
(65) The tire pressure system transponder data is being displayed on the scan tool. The scan tool is reporting communication with only three transponders. What is the most likely cause?
(76) A remote keyless entry system is inoperative. Which of the following is the most common cause of the problem?
(82) A radio transmitter generates radio frequency by taking the data and encoding it onto a(n) ____.
(70) In a simple crystal radio, a capacitor/inductor oscillator performs as the ____ for the radio.
(83) 
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