Final auto exam

Air bag system service is being discussed. Technician A says an air bag simulator can be installed in place of the air bag thereby allowing accurate testing of the circuits without the fear of accidental air bag deployment. Technician B says air bag sensors are checked by back-probing the connector. Who is correct?

A

Technician A says diodes are semiconductors. Technician B says diodes function as electronic circuit relays. Who is correct?

A

Technician A says two-stage air bags may not always fully deploy. Technician B says two-stage air bags are only used on the driver's side. Who is correct?

A

Technician A says that air bag systems may use up to five sensors. Technician B says all sensors are located in the passenger compartment. Who is correct?

A only

The purpose of the air bag diagnostic monitor is to ______. Supply backup power to the system control operation of airbag light determine whether there is a fault in the system All of the above

All of the above

Which of the following is a type of diode? Clamping Zener Led All of the above

All of the above

Cruise control systems are being discussed. Technician A says the cruise control system uses a governor valve operated by automatic transmission fluid [ATF] pressure to control the throttle. Technician B says vehicles that use electronic throttle control [throttle by wire] do not require a separate cruise control module, stepper motor, or cable to control engine speed. Who is correct?

B

Technician A says the primary purpose of a multiplexing system is to send and receive multiple analog signals. Technician B says multiplexing uses bus data links. Who is correct?

B

Technician A says that the air bag control module contains the clockspring and the inflator. Technician B says that the diagnostic monitor assembly [ASDM] supplies emergency current to the system if battery voltage is lost. Who is correct?

B only

Antitheft devices are being discussed. Technician A says the master key can operate the ignition, and unlock all the doors, trunk, and glove box. Technician B says the valet key only works on the doors and the ignition. Who is correct?

Both

Seat belt retractors are being discussed. Technician A says that when the belt is suddenly jerked on a webbing-sensitive retractor system, the retractor should lock up. Technician B says a vehicle-sensitive retractor can only be tested by braking the vehicle at speeds of 5 to 8 MPH. Who is correct?

Both

Technician A says that an air bag module is serviced as an assembly. Technician B says that it is acceptable to replace all the sensors if one is found to be damaged. Who is correct?

Both

Technician A says when positive voltage is applied to the base of an NPN transistor, the transistor is turned on. Technician B says when an NPN transistor is turned on, current flows through the collector and emitter of the transistor. Who is correct?

Both

The reasons for slower than normal wiper operation are being discussed. Technician A says the problem may be in the mechanical linkage. Technician B says there may be excessive resistance in the electrical circuit. Who is correct?

Both

The right front window does NOT function on a power window vehicle. Technician A states that there may be an open in the window motor circuit. Technician B states that either the master switch or right door switch could be defective. Who is correct?

Both

What do the two-speed permanent magnet type wiper motors generally use to achieve the two speeds? Cams brush position Gears All of the above

Brush position

A(n) _____is often used to prevent damage to electronic components from the voltage spikes produced when electromagnetic coils are turned off.

Clamping diode

A CAN [controller area network] bus is a low-speed data bus.

False

A blinking cruise control light indicates that the vehicle is traveling at the maximum speed that the cruise control system allows.

False

Multiplexing requires many more wires and additional sensors in the vehicle network.

False

Smart air bag systems usually have three stages of deployment.

False

Some vehicles have a switch that allows the driver's side air bag to be turned off.

False

The instrument panel warning light is called a DTC.

False

Which of the following is NOT made of semiconductor material? Zener diode Led magnetic pulse generator transistor

Magnetic pulse generator

The two types of semiconductor materials are P-type and ______. B type N type Y type X type

N type

Which of the following tools should be used to test an air bag system? Ac powered voltmeter ac powered ohmmeter Sintered nanometer 12 volt light scan tool

Scan tool

A multiplex wiring system uses bus data links that connect different computers or control modules together.

True

After deployment of the air bag, there may be some potentially harmful sodium hydroxide residue on the seats and upholstery.

True

Always disconnect the negative battery cable and wait the recommended time before attempting any service on an air bag system. (T/F)

True

In an OBD-II system, each component is checked by a diagnostic routine to verify that it is functioning properly.

True

Most power seat systems are protected by a circuit breaker.

True

Side head protection air bags are designed to stay inflated for about five seconds to offer protection against a second or third impact.

True

Some common semiconductor materials include silicon and germanium. T/F

True

The purpose of a dual horn system is to provide a fuller horn sound.

True

When disconnecting and connecting electronic components, the ignition switch should be turned off.

True

Which of the following factors is NOT used in determining the intensity of air bag deployment in an adaptive [two stage] air bag system? Seat position Occupant weight Vehicle speed

Vehicle speed

Actuators (outputs) are being discussed. Technician A says they are variable resistance/ reference-types, switches, and thermistors. Technician B says they convert electrical current into mechanical action. Who is correct?

b

A six-way power seat is NOT operating in any switch position. Technician A says to check the circuit breaker. Technician B says there may be excessive resistance in the electrical circuit. Who is correct?

both

Semiconductors are being discussed. Technician A says a semiconductor can be used as a conductor. Technician B says a semiconductor can be used as an insulator. Who is correct?

both

Reflashing a computer requires that the computer be removed from the vehicle and sent back to the manufacturer for reflashing.

false

The number of charge/discharge cycles an ultracapacitor can supply to the hybrid traction motor system is approximately ______.

infinite

Rear defrosters generally have a relay with a timer to allow the defogger to ______. Function until the window is clear operate for only a specific amount of time be independent of the ignition switch allow cool down between pulses operate for a only a specific amount of time

operate for only a specific amount of time

After the wipers are turned off, the ______ switch provides power to the wiper motor until the wipers blades reach the bottom of the windshield. Interval rest overrun park

park

If a 100 microfarad capacitor is charged off of a 12 volt battery, how many volts will be present between the terminals of the capacitor?

12 volts

The reference voltage [Vref] sent to most sensors ranges from _____ to _____ volts.

5.0, 9.0