Deck 15: Radio Frequency and Infotainment Systems Servicing Radio Frequency and Infotainment Systems

Question 1

A remote keyless entry system is inoperative. Which of the following is the most common cause of the problem?

A)A defective lock solenoid
B)A weak transmitter battery
C)A blown transmitter fuse
D)A burned out receiver module

Answer 1

B

Question 2

If a radio system has only one audio input but multiple audio sources, it may use a(n) __________ to switch between the sources.

A) Decoder
B)Translator
C)Multiplexer
D) Grid/antenna Module

Answer 2

C

Question 3

Transmitting antennas work by:

A) Oscillating current to create a magnetic field.
B)Magnetic field induction of an electric field.
C)All of these choices.
D) None of these choices.

Answer 3

C

Question 4

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?

A)An invalid key was used.
B)A misadjusted doorjamb switch.
C)The immobilizer module has a poor ground.
D)Lost communication between immobilizer module and PCM.

Question 5

What component of a radio performs the function of the tuner?

A) Capacitor/inductor oscillator.
B)Decoder.
C)Antenna.
D) None of these choices.

Question 6

What is the function of the radio's detector?

A) Determines the frequency to amplify.
B)Extracts the data from the sine wave.
C)Receives the sine waves from space.
D) All of these choices .

Question 7

The purpose of transmitting temperature information along with the tire pressure readings is to:

A) Alert the driver of tire over temperature conditions.
B)Prevent the tire pressure monitoring system from using the data sent by the tire pressure sensors when the tires are cold.
C)To prevent false low tire pressure warning messages from being displayed.
D) To alert the driver that ice may be on the road.

Question 8

The RKE system fails to operate.  An RF detector tool does not indicate a signal is being received from the FOB when a button is pushed.  Which of the following is the LEAST likely cause?

A) FOB not programmed.
B) Batteries too low.
C) Damaged FOB.
D) Batteries installed wrong.

Question 9

The TPS will send pressure data to the receiver module when which of the following occurs:

A) The vehicle is parked once every 13 hours .
B)While the vehicle is in motion once every 15 seconds .
C)A drop in pressure greater than 1 psi occurs .
D) All of these choices .

Question 10

To program ignition keys into the immobilizer system, all of the following may be required EXCEPT:

A)PIN number.
B)Scan tool.
C)DMM.
D)All previously programmed keys.

Question 11

Each key of the immobilizer system has a unique:

A) Secret key code.
B)Transponder ID code.
C)Cover interface.
D) TFT overlay.

Question 12

The satellite radio's signal is processed by the:

A) The antenna.
B) The radio mode selection transformer.
C)Data bus interface chip.
D) The satellite digital audio receiver.

Question 13

The speaker produces sound by:

A) Creating a noise from a vibrating diaphragm.
B)Changing air pressures in front of the speaker cone.
C)Rubbing two dissimilar materials together at the speed of sound.
D) Changing resistance of the permanent magnet.

Question 14

The tire pressure monitoring system can identify the location of the tire on the vehicle by:

A)Training magnets.
B)Electronic transponders.
C)All of these choices.
D)None of these choices.

Question 15

A radio choke is a winding of wire that is used to:

A) Allow the DC current to pass normally.
B)Block AC current.
C)All of these choices.
D) None of these choices.

Question 16

Using a TPM analyzer results in the illumination of the FAIL light when attempting to retrieve data from the sensor. Which of the following is the most likely cause?

A) Too low of tire pressure.
B) Transponder power supply circuit open.
C)Data circuit between transponder and TPM ECU defective.
D) Improper tire pressure sensor installed.

Question 17

A customer states that his or her engine starts and then dies. This seems to be intermittent. The customer makes arrangements to leave the vehicle for three days to be diagnosed and repaired. During these three days, the vehicle does not have any problems. The immobilizer module does have a stored "Invalid Key." What is the MOST likely cause of this problem?

A)The battery in the key is low.
B)The customer has more than one transponder key on the ring.
C)The cut of the key blade is worn.
D)None of these choices.