Deck 13: Accessorieselectrical Accessories Diagnosis and Repair

Question 1

Testing of an alarm system is being discussed. Technician A says that if the system fails to operate with the relay by-passed. The relay is defective. Technician B says the relay is generally tested with an ammeter. Who is correct?

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

Answer 1

D

Question 2

When testing the rear window defogger, the test light remains bright as it is moved the length of each grid. The most likely cause is a poor ground circuit connection.

Answer 2

True

Question 3

The amount of current flow through the rear window defogger grid depends on the temperature of the grid.

Answer 3

True

Question 4

The power door lock system does not operate. Technician A says faulty unlock relay contacts could be the cause. Technician B says a faulty motor could cause this. Who is correct?

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

Question 5

A window regulator converts the rotary motion of the motor into the vertical movement of the window.

Question 6

The drive side power seat does move fore or aft. The technician notices that the motor attempts to move the seat then stops. The least likely cause of this is:

A) A binding track
B) A short in the motor armature
C) A faulty PTC
D) An obstruction under the seat

Question 7

When diagnosing a memory seat system, you find that the driver's seat does not move at all. The first procedure you should perform is

A) to check the system for codes.
B) a visual inspection.
C) to check for voltage to the motor.
D) to replace the defective seat motor.

Question 8

The antitheft system alarm periodically goes off without any apparent reason. Technician A says the problem could be caused by a faulty door ajar switch. Technician B says worn contacts inside the starter interrupt relay could be causing the problem. Who is correct?

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

Question 9

The cruise control system is inoperative. Technician A says a faulty brake light switch can be the cause. Technician B says the cause may be the dump valve is stuck open. Who is correct?

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

Question 10

A resistor block wired in parallel controls the speed of most motor fans.

Question 11

The set vehicle speed for cruise control can be a function of the electronic throttle control (ETC) system.

Question 12

Technician A says aftermarket grill assemblies may inhibit the operation of the adaptive cruise control system. Technician B says a horn that sounds continuously can be caused by a short to ground in the between the relay and the horn. Who is correct?

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

Question 13

Interval or intermittent wipers use a variable resistor to directly control current flow to the motor.

Question 14

Technician A says the electronic cruise control system may use a normally open vent valve. Technician B says the electronic cruise control system may utilize the electronic throttle control system. Who is correct?

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

Question 15

The horn button on a relay-equipped horn system will apply a ground to the relay coil to activate the horn(s).

Question 16

The adaptive cruise control system is not operating. Technician A says the ACC sensor may have debris on the lens. Technician B says electronic throttle control actuator is faulty. Who is correct?

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

Question 17

A vent valve that is stuck open may cause the cruise control system to be inoperative.

Question 18

The memory seat function will operate only when the transmission is in the park position.

Question 19

The wipers operate properly in the manual mode, but not in the automatic mode. Technician A says the problem may be caused by a fault in the bus network. Technician B says the problem may be caused by a faulty rain sensor module. Who is correct?

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

Question 20

False wipes in an automatic wiper system are usually the result of a foreign material on the windshield or from flaws in the windshield that interfere with the system optics.

Question 21

Technician A says on an electromagnetic field wiper motor the strength of the total magnetic field will determine the motor speed. Technician B says on an electromagnetic field wiper motor the two field coils are wound in opposite directions so their magnetic fields will oppose each other. Who is correct?

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

Question 22

Blower motor resistor blocks are being discussed, Technician A says if the thermal limiter opens the fan will only operate at high speed. Technician B says if any of the resistors burn out, the blower motor fan will operate at low speed only. Who is correct?

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

Question 23

The electric rear window defogger system is being discussed. Technician A says the grid is a series of controlled voltage amplifiers. Technician B says to protect the vehicle's electrical system, a timer circuit may be incorporated. Who is correct?

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

Question 24

Intermittent wiper systems are being discussed. Technician A says they may use a solid-state module that may be incorporated into the body computer. Technician B says they may use a capacitor that operates the wiper motor directly until it is fully discharged. Who is correct?

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

Question 25

Slower-than-normal wiper operation is being discussed. Technician A says this may be caused by excessive electrical resistance. Technician B says this may be caused by a problem in the mechanical linkage. Who is correct?

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

Question 26

Technician A says the power seat system typically uses stepper motors. Technician B says the rotational direction of the power seat motor is determined by the direction current flows through it. Who is correct?

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

Question 27

A two-speed windshield wiper will operate in only the low-speed position. Technician A says the common motor brush is worn. Technician B says the Hi-Lo relay may be faulty. Who is correct?  

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

Question 28

The driver side power window will not go up or down. Technician A says a worn motor may be the problem. Technician B says the problem could be caused by a faulty master switch. Who is correct?

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

Question 29

An inoperative electrochromic mirror is being discussed. Technician A says the mirror's light sensor may be faulty. Technician B says the external mirror switch may be defective. Who is correct?

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

Question 30

The right front electric window is inoperative regardless of which switch is used. It sounds like the motor is turning. Technician A says the window regulator may be disengaged. Technician B says the sector gear may be worn. Who is correct?

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

Question 31

Horn relays are sometimes included in the horn circuit for which of the following reasons?

A) To allow the use of two horns in the circuit
B) To decrease the amount of current needed to activate the horn
C) To decrease the amount of current that flows through the horn switch
D) To allow the horn button to be placed on the end of a stalk on the steering column

Question 32

Blower motor system fan speed control is being discussed. Technician A says this is done by a resistor block wired in parallel to the fan. Technician B says this is done by use by a power module. Who is correct?

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

Question 33

Technician A says the motor turns faster if there are more armature windings connected between the common and high-speed brushes. Technician B says the less counterelectromotive force (CEMF) in the armature, the greater the armature current. Who is correct?

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

Question 34

Technician A says a horn that sounds constantly could be caused by a faulty relay. Technician B says a horn that sounds constantly could be caused by an open in the horn button switch. Who is correct?

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

Question 35

Which component within the wiper motor ensures that when the motor is turned off the wiper arms will be brought to the bottom position?

A) Wiper switch
B) Park switch
C) Recycle relay
D) None of the above

Question 36

A blower motor that is rotating very slowly is being tested. A voltmeter placed across the power and ground terminals of the motor indicates 6 volts when the blower switch is placed in the "high" speed position. All of the following statements about the possible cause of this problem are true, EXCEPT  

A) the blower relay may be faulty
B) there may be excessive ground circuit resistance
C) there may be excessive resistance in the power feed circuit to the motor
D) the blower motor may be faulty

Question 37

An inoperative electronic cruise control system is being discussed. Technician A says a stuck closed brake switch could be causing the problem. Technician B says the problem could be caused by an open cruise engagement switch. Who is correct?

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

Question 38

The rear window defogger is removing only partial areas of fog from the window Technician A says the grid is damaged. Technician B says this indicates a faulty timer circuit. Who is correct?

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

Question 39

The horn of a vehicle equipped with a horn relay is blowing very weakly; its sound level is continuous but low in volume. Technician A says the horn relay contacts may have excessive resistance. Technician B says the horn switch may have high resistance. Who is correct?

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

Question 40

An electric window with a two-wire motor operates only in one direction. Which of the following could cause this problem?

A) Faulty window switch
B) Faulty window motor
C) Faulty system circuit breaker
D) All of the above

Question 41

What type of windshield wiper system allows the blades to drop down below the lower windshield molding to hide them?

Question 42

Electric defoggers operate on what principle?

Question 43

Describe the procedure used to determine if a windshield wiper problem is electrical or mechanical.

Question 44

A high-side driver controlled heated seat grid system is being diagnosed. The connector from the control module is backprobed and a voltmeter connected to output circuit from the controller to the seat grid. When the system is activated, the voltmeter reads zero volts. Technician A says this system may deactivate the system if a fault is detected. Technician B says the control module is faulty. Who is correct?

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

Question 45

How does brush placement control the speed of a permanent magnet windshield wiper motor?

Question 46

Technician A says the blower motor is usually a permanent magnet, single-speed motor. Technician B says the switch position directs current flow to one of the three different brushes in the blower motor. Who is correct?

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

Question 47

The operational speed of electromagnetic field winding depends on the strength of the motor's total what?

Question 48

The power seat operates normally, but the memory recall function does not. What could be the cause?

Question 49

Describe the operation of the computer-controlled wiper system.

Question 50

Testing of the blower motor system shown is being discussed. The power module terminals for both the control and motor ground circuits is backprobed. A voltmeter is connected between the control circuit terminal and chassis ground, and the second voltmeter is connected between the motor ground terminal and chassis ground. Technician A says when the motor is turned off, both voltmeters should read 12 volts. Technician B says as the blower motor switch is rotated from LOW speed to HIGH speed, the readings on the first voltmeter should drop. Who is correct?  

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

Question 51

What component converts the rotary motion of the motor into the vertical movement of the window?

Question 52

Describe the operation of the keyless entry system.

Question 53

What type of sensor is used by the adaptive cruise control system to maintain set vehicle-to-vehicle distance?

Question 54

Describe the operation of the adaptive cruise control system.

Question 55

Describe some possible causes of intermittent operation of power door locks.

Question 56

How do depressed-park windshield wiper systems generally park the blades?

A) By turning off B+ to the motor
B) By applying B+ to the motor
C) By ungrounding the switch
D) By reversing the motor direction

Question 57

Describe the function of the memory seat.

Question 58

Climate-controlled seats are being discussed. Technician A says a Peltier element can be used to either heat or cool the airflow as it passes through the controller. Technician B says the system may rely on several modules to perform their functions. Who is correct?

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

Question 59

What comfort features do climate-controlled seats offer?

Question 60

What feature is an additional function of many memory seat systems that moves the seat rearward when the key is removed from the ignition switch?