auto 60 final study
Which statement is true about fuse ratings?
80% of the fuse rating should equal the current in the circuit and The fuse rating should be higher than the normal current for the circuit
When testing a relay using an ohmmeter, which two terminals should be touched to measure the coil resistance?
85 and 86
Which relay terminal is the normally closed (NC) terminal?
87A
A twisted pair circuit has wire with at least ________ turns per foot.
9
Headlights can be aimed by using ________.
A bubble level and An aiming screen
A box drawn with a solid line in a wiring diagram indicates ________.
A complete component
Electronic indicators alert the driver when ________.
A fault is detected in the airbag (SRS) system and Traction control is turned off
This symbol in a wiring diagram indicates ________.
A female terminal
A brake warning lamp on the dash remains on whenever the ignition is on. If the wire to the pressure differential switch (usually a part of the combination valve or built into the master cylinder) is unplugged, the dash lamp goes out. Technician A says that this is an indication of a fault in the brake hydraulic system. Technician B says the problem is probably due to a stuck parking brake cable switch. Who is right?
A only
A technician is performing a wire repair on a circuit under the hood of a vehicle. Technician A says to use solder and adhesive-lined heat shrink tubing or a crimp and seal connector. Technician B says to solder and use electrical tape. Which technician is correct?
A only
A weak-sounding horn is being diagnosed. Technician A says that a poor ground connector at the horn itself could be the cause. Technician B says that an open relay can be the cause. Which technician is correct?
A only
Technician A says that copper jumper cables are better than aluminum jumper cables. Technician B says that aluminum jumper cables are better than copper jumper cables. Which technician is correct?
A only
Technician A says that metal-type window tinting can affect the navigation system. Technician B says that most navigation systems require a monthly payment for use of the GPS satellite. Who is right?
A only
Technician A states a loose fuel cap could illuminate the MIL. Technician B says that a loose fuel cap could cause a B0320 diagnostic trouble code. Which technician is correct?
A only
How does changing tire diameter affect the speedometer reading?
A smaller diameter tire causes the speedometer to read faster than the actual speed and more than the actual mileage on the odometer
What controls the operation of a pulse-wiper system?
A solid-state (electronic) module
On a wiring diagram, S110 with a ".8 BRN/BLK" means ________.
A splice of a brown with black stripe, wire size being 0.8 square millimeters (18 gauge AWG)
The light indicating a problem with the ABS system is colored ________.
Amber
Technician A says that backup sensors use LEDs to detect objects. Technician B says that a backup sensor will not work correctly if the paint is thicker than 0.006 inch. Who is right?
B only
Technician A states that disconnecting the battery is the best way to erase stored OBD-II DTCs. Technician B states that disconnecting the battery may not erase stored freeze frame information or DTCs. Which technician is correct?
B only
A customer states her MIL is blinking. Technician A says that this condition may damage the catalytic converter if the customer continues driving. Technician B says that freeze frame data should be stored. Which technician is correct?
Both
Flasher units are being discussed. Technician A says that a DOT (Department of Transportation) approved flasher unit should be used for turn signals. Technician B says that a parallel (variable-load) flasher will function for turn signal usage, although it will not warn the driver if a bulb burns out. Who is right?
Both
Technician A says that LCDs may be slow to work at low temperatures. Technician B says that the LCD dash display can be damaged if pressure is exerted on the front of the display during cleaning. Who is right?
Both
Technician A says that a good relay should measure between 60 and 100 ohms across the coil terminals. Technician B says that OL should be displayed on an ohmmeter when touching terminals 30 and 87. Which technician is correct?
Both
Technician A says that high-intensity discharge (HID) headlights are brighter and have a blue tint. Technician B says that one defective turn signal bulb can cause the turn signal on the affected side to stop blinking (flashing). Who is right?
Both
Technician A says that most digital and analog (needle-type) dash gauges use variable resistance sensors. Technician B says that permanent-magnet (PM) generators produce an AC signal and are used for vehicle speed and wheel speed sensors. Who is right?
Both
Technician A says that there is often more than one circuit being protected by each fuse. Technician B says that more than one circuit often shares a single ground connector. Which technician is correct?
Both
Two technicians are discussing fuse testing. Technician A says that a test light should light on both test points of the fuse if it OK. Technician B says that the fuse is defective if a test light only lights on one side of the fuse. Which technician is correct?
Both
The trade number also identifies the size, shape, number of filaments, and amount of light produced. This is measured in which of these units?
Candlepower
The OnStar system operates by using GPS data and ________.
Cellular telephone service
A PTC circuit protector prevents excessive current flow in a circuit by ________.
Changing to a very high resistance
Interior overhead lights (dome lights) are operated by door jamb switches that ________.
Complete the power side of the circuit or Complete the ground side of the circuit
What type of headlight assembly is shown in the below illustration?
Composite
In this diagram the notation "C202" indicates ________.
Connector # 202
What is a "CPA"?
Connector position assurance
If the oil pressure warning lamp on a General Motors vehicle is on all the time, yet the engine oil pressure is normal, the problem could be ________.
Defective (shorted) oil pressure sending unit (sensor) or Wire shorted to ground between sending unit (sensor)and dash warning lamp
OBD-II requirements include
Detect component degradation or faulty emission control operation, Alert the driver of necessary emission-related repairs or service and Use standardized DTCs and accept a generic scan tool
To determine if a windshield wiper problem is electrical or mechanical, the technician should ________.
Disconnect the linkage from the windshield wiper motor and operate the windshield wiper
Most modern vehicles use a(n) ________ for an input to the engine temperature display.
ECT sensor
Which term describes a set of conditions required to allow each monitor to run?
Enabling criteria
The positive side of a circuit usually uses what type of a connector, according to the text?
Female
The HID lighting system consists of all of these components, EXCEPT ________.
Filament
The sending unit in a typical fuel gauge uses which of these devices?
Float
Which is a continuous monitor?
Fuel system monitor
DTC P0302 is a(n) ________.
Generic DTC
A braided wire running from the negative battery terminal to the body of a vehicle is known as a ________.
Ground strap
The horn switch on the steering wheel of a vehicle that uses a horn relay ________.
Grounds the horn relay coil
Which of these is a supplemental display that projects the vehicle speed and sometimes other data, such as turn signal information, onto the windshield?
Head-up display (HUD)
Global (generic) OBD II contains some data in what format?
Hexadecimal
Refer to the wiring schematic. A burned open R2 in the blower resistor pack would have what effect on the blower operation?
Hi or Med Hi only
Which pitch horn is used for a single horn application?
High pitched
A monitor that has not run to completion will indicate ________ on the scan tool.
Incomplete
A rain-sense wiper system uses a rain sensor that is usually mounted ________.
Inside of the windshield at the top
Which of these electronic display devices uses electrodes and polarized fluid to create numbers and characters?
LCD (Liquid Crystal Display)
Electrical feedback is usually a result of ________.
Lack of a proper ground
Which OBD-II term describes the "check engine" light?
MIL
Which type of fuse can handle up to 80 amps?
Maxi
Parameter information display (PID) is included in which OBD-II generic mode?
Mode 1
Most braided ground straps are ________.
Most braided ground straps are ________.
A backup camera system can may be integrated with the vehicle ________ system
Navigation
Two technicians are discussing a fuel gauge on a General motors vehicle. Technician A says that if the ground wire connection to fuel tank sending unit becomes rusty or corroded, the fuel gauge will read lower than normal. Technician B says that when the power lead to the fuel tank sending unit is disconnected from the tank unit and grounded (ignition on), the fuel gauge should go to empty. Who is right?
Neither technician
What would be the result if G302 was disconnected?
No high beam indicator light
A customer complains that every time the lights are turned on in the vehicle, the dash display dims. Which of these is the MOST likely cause which of these conditions?
Normal behavior for VTF dash display
The General Motors rear park assist (RPA) system senses ________ behind the vehicle.
Objects
By looking at the way diagnostic trouble codes are formatted, which DTC could indicate the gas cap is loose or defective?
P0442
The electronics in the rain-sense wiper module can detect the presence of rain drops under various lighting conditions. Which of these solid state components is used to sense rain drops?
Photo Diode, Laser LED or Infrared light sensor
For an electrical device to operate, it must have ________.
Power and a ground
The parking brake switch is in a circuit that illuminates a(n) ________ color light in the instrument cluster.
Red
A vehicle with a lane departure warning system uses sensors or cameras to monitor ________.
Road line markings
The type of solder that should be used for electrical work is ________.
Rosin core
Which of the following terms describes a drawing or chart of an electrical circuit using lines and symbols to represent circuit path and components?
Schematic and Diagram
An oil pressure warning lamp is usually controlled by which of these devices?
Sensor unit
Flasher units are being discussed. Technician A says that a DOT (Department of Transportation) approved flasher unit should be used for turn signals. Technician B says that a parallel (variable-load) flasher will function for turn signal usage, although it will not warn the driver if a bulb burns out. Who is right?
Shift interlock, ABS brakes or Cruise control
The comprehensive component monitor checks computer controlled devices for ________.
Shorts-to-ground, Rationality, opens
If a wire repair, such as repairs made under the hood or under the vehicle is exposed to the elements, which type repair should be used?
Solder and adhesive-lined heat shrink or crimp and seal connectors
Metric wire size is measured in units of ________.
Square millimeters
All of these are OBD-II requirements EXCEPT ________.
Tell the technician what is wrong with the engine
A defective blower motor draws more current than a good motor because ________.
The CEMF decreases
A vehicle has stored a DTC for an oxygen sensor fault. This could cause ________.
The catalyst monitor to not run
The MIL is turned off if ________.
The codes are cleared with a scan tool, Power to the PCM is disconnected and The vehicle is driven on three consecutive trips with a warm up cycle and meets all code set conditions without the PCM detecting any faults
A pending code is set when a fault is detected on ________.
The first fault of a two trip failure
A defective taillight or front park light bulb could cause ________.
The lights-on chime to sound if the brake pedal is depressed, The dash lights to come on when the brake lights are on or The turn signal indicator on the dash to light when the lights are turned on
The higher the AWG number, ________.
The smaller the wire diameter
Many ground straps are uninsulated and braided because ________.
They help dampen radio-frequency interference (RFI) and They are more flexible to allow movement of the engine without breaking the wire
An important input to the backup camera system comes from the ________, which signals the backup camera when the transmission is shifted into reverse.
Transmission range switch
An ignition misfire or fuel mixture problem is an example of what type of DTC?
Type A
Which first digit code indicates a network fault?
U
A freeze frame is generated on an OBD-II vehicle ________.
When a type A or B diagnostic trouble code is set
The symbol in the figure below indicates which of these?
ground
Thick wires have a ________ AWG rating than thin wires
lower
When troubleshooting an electrical problem, where is a good place to start?
relay
Which of these is a type of electric motor designed to rotate in small steps based on the signal from a vehicle computer?
stepper motor
OBD-II requires the PCM to detect faults allowing emissions that exceed how many times the FTP standard?
1.5
Using the bulb table below, which bulb is brightest?
1157
A metric wire size of 2.0 mm2 is equivalent to ________ AWG size.
14ga
To be considered a complete warm up cycle, the engine must reach a temperature of ________.
160°F
OBD-II has been on all passenger cars in the United States since ________.
1996
Wire A has a diameter of 0.032 inches. Wire B has a diameter of 0.102 inches and an AWG rating of 10. Which of these is MOST likely to be the AWG rating of Wire A?
20G
Which of these is the recommended gauge wire for automotive speakers?
20ga
The computer will automatically clear a DTC if there are no additional detected faults after ________.
40 consecutive warm up cycles
