CR104B Vehicle Electrical and Mechanical Systems Practice Test

These questions are part of the practice quiz. Start practicing

• In the circuit where bulbs A and B do not light and the DVOM shows a voltage drop across bulb B equal to the source voltage, which technician is correct?
• Which statements about magnetic pickups are correct?
• Regarding lumbar support systems, the statement 'Some lumbar support systems pump air into a mat located in the seat back' is
• What instrument is used to verify a ground path under load by measuring voltage drop?
• Which statement about repair manuals and testing plans is correct?
• All of the following can increase circuit resistance EXCEPT:
• Where would the voltmeter read 0 volts in a single-load circuit?
• Which adhesive is recommended for replacing a bonded side view mirror glass?
• Which of the following statements about the I-CAR material is correct?
• Starting in the area of the collision to identify electrical faults is part of applying the collision advantage to the repair.
• The headlights are blinking on and off. The problem is likely:
• Technician A says that the memory seat function will have to be reprogrammed after the battery is disconnected. Technician B says that the memory seat function only works if the vehicle is in NEUTRAL or PARK. Who is right?
• Which instrument is used to measure the specific gravity of a battery cell?
• In troubleshooting, which step focuses on understanding the system?
• Which measurement is primarily used to detect an open circuit?
• In a parallel circuit, which statement is true about branch currents?
• To measure milli- from the base unit, the decimal point moves how many places?
• In a power window system, which component handles switching current to the motor?
• Which statement is correct about wire gauge current capacity?
• Calibration of the front mounted radar may require which of the following?
• Which technology do rain sensors use to detect moisture?
• Which device is used to monitor heated seat element temperature?
• Which statements about voltage are correct?
• In testing wiper arm force on the windshield, which condition is used to take the measurement?
• Twenty vehicle makers have committed to making automatic emergency braking standard by 2022.
• Which method is correct for testing waterproof connectors?
• When a blower fan runs slow while all other electrical loads function normally, what is the next step per the I-CAR Troubleshooting Flowchart?
• A battery should be removed while the engine is running. A battery should be removed with the headlamps ON. Who is right?
• Technician A says that some damaged horn switches require replacing the airbag module. Technician B says that a damaged clockspring harness can be repaired. Who is right?
• True or False: Honda has released a position statement on pre- and post-repair scan requirements.
• Circuit breakers used on a vehicle may cause the headlights to flash ON and OFF.
• Which statement about heating elements in mirrors and rear defogger grids is correct?
• Which device enables remote diagnostics over the Internet?
• If the voltage during charging reaches 15.5 volts, which action is appropriate?
• In a power window system, what is one primary purpose of using a relay?
• Which of the following could be considered part of using the collision advantage?
• Which indicates a properly operating relay when energized?
• Which statement about windshield wiper chatter is true?
• Regarding replacement mirrors, which statement is true?
• If a device is connected in parallel to a circuit, what happens to the total current?
• In what year was OBD II mandated on all vehicles sold in the U.S.?
• All of these are mechanical failures for a power window EXCEPT:
• A voltage drop test measures the consumed voltage.
• Diodes may be found on all of the following components except which?
• Using the test results, reason for the higher amperage reading in bulb D compared to A and B?
• A short to ground on the ground side of a trunk lid solenoid and trunk release switch may not directly affect the circuit at all. Which statement best describes this?
• A twisted pair helps reduce electromagnetic interference by
• Which sequence best represents a complete circuit as described in the material?
• In shielded wiring, what is the purpose of a drain wire?
• In diagnosing a power antenna system, Technician A states that a broken plastic cable in the antenna housing requires replacement of the power antenna assembly. Technician B states that a power antenna motor that shows no continuity must be replaced. Who is right?
• Express Down and Express Up features: which option is true?
• When measuring current, the ammeter is placed in:
• Kits are available to repair the heated mirror defogger grid.
• True or False: It is important to maintain good battery voltage when performing diagnostic scans to prevent modules from shutting down.
• A load connected to a corroded ground is like another load connected in series. Part of the voltage will drop across the corroded ground. Which statement is true about this condition?
• In a series circuit, the current through each component is:
• Technician A says that the battery voltage should be 12.0-12.2 VDC with the alternator not operating. Technician B says that the voltage should be 14.0-14.1 VDC with the alternator operating. Who is right?
• Technical Service Bulletins are issued for issues that are specific to which factors?
• Ignition coils are considered pulse transformers and perform all of the following except which?
• Which statements about door lock actuation are correct?
• Which statements about the ground side of a circuit are true?
• Intermittent wiper systems can vary the time between wipes using which components?
• When performing a battery load test using a VAT, the current draw that should be applied is:
• In a series circuit, voltage drop readings show that:
• If the windshield wipers do not work, and a voltage drop check at the wiper motor reads 0 volts, the problem is likely:
• What is the primary purpose of a hydrometer in battery maintenance?
• Which tool is not typically required for electrical troubleshooting?
• If a DTC was set 35 miles before the customer dropped off the vehicle, there is a good chance it could be collision related.
• If the battery state of charge is 25%, the open circuit voltage is about:
• Which statement about voltage is true?
• In a simple circuit where a switch controls a bulb, what happens when the switch is closed?
• In a simple circuit with one load, a voltmeter placed on the supply side would read which of the following?
• Which activity is described as part of applying the collision-based diagnostic approach?
• In diagnosing a power antenna system, which statement is correct?
• Which set of elements best represents a complete circuit?
• When performing a loaded voltage output test, voltage should be about how much above open circuit voltage?
• Which statement about the depressed park feature is true?
• Meter reading shows ground circuit within specification vs part of circuit with switch open?
• Knocking sounds when the wipers change direction may be caused by:
• Diodes serve what important electrical function?
• Flowchart diagrams that use yes/no questions are typically set up in which type of diagram?
• Headlamp adjustment can include UP and DOWN and LEFT and RIGHT adjustments. Which option best describes this capability?
• In a series circuit with one lamp open, what happens to the current through the remaining lamps?
• Technician A says that when making resistance measurements on a circuit, it is important to observe the correct polarity when connecting the test leads. Technician B says that resistance measurements should be made using a DVOM set to the Ohms scale. Who is right?
• During alternator performance testing, a reading greater than 500 mV AC indicates the alternator should be replaced.
• Which statement about the ground side of a circuit is true?
• Which DTC statuses can be viewed using the Toyota TechStream?
• Connector 108 is referenced on a wiring diagram just after the fuse and again after the load. This means that:
• Regarding heated seat elements, which statement is correct?
• When testing solenoids, which sound should you listen for?
• Ignition coils can be called a:
• When the engine is off and the alternator is not operating, the typical battery terminal voltage is about which range?
• During a 3-minute charge test, the battery should be replaced if the voltage rises above:
• The memory seat switch operates the seat when the gear selector is in which position?
• Some washer pumps are located where?
• Technician A says circuit breakers are used on some circuits to protect them from temporary current overload. Technician B says that circuit breakers work because of a bimetal strip that moves and opens contacts when too much current passes through. Who is right?
• Which statements about shielded wiring are correct?
• Which statement is correct regarding wiper motor voltage when running vs off and protection?
• A wire runs behind a damaged door panel from a connector ground terminal to a ground bolt. To check continuity between the ground terminal and the ground bolt, use a:
• Can power sliding door problems be diagnosed with a scan tool?
• To determine seat position, memory seat systems use seat position sensors called what?
• Which of the following vehicle makers have released a position statement for pre- and post-repair scan requirements?
• Which of the following is the first troubleshooting step after discovering that the wipers do not work?
• Circuit breakers are used on some circuits to protect them from temporary overload. Which statement best reflects this?
• True or False: Modern vehicle electrical systems have built-in diagnostics capable of identifying a bent sensor bracket.
• To mount the regulator to the door, which fastener combination is used?
• Skipping or wiper chatter during windshield wiper operation may be caused by all of these EXCEPT:
• A corroded ground can be thought of as what element in the circuit?
• Technician A states that some repair manuals include repair plans. Technician B states that technicians may develop their own repair plan. Who is right?
• What does the ground side refer to in a circuit?
• Which statement about door lock actuation is false?
• During wiper arm force testing, which condition is required for the measurement?
• A resistance measurement can determine if the circuit has an open.
• What is the purpose of capacitors in some intermittent wiper systems?
• Which type of solder should be used for repairs to automotive electrical circuits?
• When testing magnetic pickups, which parameter should not be tested?
• Replacement mirrors: which statement is accurate?
• Memory seat systems typically operate in which gear positions?
• Technician A says that some wiper systems will set a diagnostic trouble code. Technician B says that a faulty control module in a wiper system requires replacement. Who is right?
• Performing a visual inspection is the first step listed on the Diagnostic SOP Checklist provided in this course.
• In memory seat systems, what is the purpose of the potentiometer seat position sensors?
• What is the proper voltage reading from ground to the middle of the backglass heating grid line?
• Which statement about washer pumps is true?
• Technician A says that headlamps assemblies have UP and DOWN adjustment. Technician B says that headlamps assemblies may have LEFT and RIGHT adjustment. Who is right?
• Which statement best describes a good conductor like silver?
• In automotive wiring practice, which statement about fuse links is correct?
• To measure kilo- from the base unit, the decimal point moves how many places?
• If a heating element in a cigarette lighter develops a fault that reduces resistance, what is the immediate electrical consequence when plugged in?
• Which statement about Technical Service Bulletins (TSBs) is correct?
• Which statement about the power sliding door initialization is true?
• To perform remote diagnostics, a technician can use an AsTech transmitter connected to the Internet.
• In a power window system, which statements about Express Down and Express Up features are correct?
• Amperage is the:
• When a system performs a built-in diagnostic test, which item would NOT be detected?
• With a wire conductor, the heavier the gauge, the which of the following is true about resistance?
• A power window switch is being tested. Which statement accurately reflects the continuity test?
• Which of the following is NOT a reason to disconnect power before measuring resistance?
• What is the force that moves electrons through a circuit called?
• An open in a complex parallel circuit might cause current to:
• If a voltmeter between the power window motor and ground reads 13 volts when the switch is closed, what is a likely fault?
• A fan motor is in series with a resistor. The resistor gets hot when the motor is running. The voltage drops across the motor and resistor will read:
• Which equation represents Ohm's Law?
• Which statement about battery voltage testing is correct?
• When performance-testing an alternator, a reading of more than 500 mV AC indicates that the:
• Technician A says that a solenoid can be tested by inspecting mechanical movement. Technician B says that a solenoid can be tested electrically. Who is right?
• Heating grid lines versus heating grid terminals: who is right?
• The vehicle charging system should be used to charge a completely discharged battery. The negative battery cable may need to be disconnected when charging a battery in the vehicle. Who is right?
• Which of the following is NOT a use of the I-CAR Electronics Checklist?
• In a circuit, the ground side commonly serves as what?
• What is the recommended method to diagnose electrical system problems beyond dash indicator lamps?
• Electronic circuits use all of the following characteristics, except which?
• What are the seat position sensors called?
• In a parallel circuit, which statement is correct?
• Semiconductors are made up of all of the following materials except which?
• Flow chart says to run the fan motor and check for a good connection between terminal #3 and the vehicle frame. The best way to do this is to check the:
• A hydrometer is used to measure the:
• Some aftermarket scan tools can perform limited calibrations and OEM-specific tests.
• The mileage value in freeze-frame data is the mileage at the moment the diagnostic code was first set.
• Silver is an excellent conductor. What does this imply about silver?
• In a loaded voltage output test, the voltage is expected to be what relative to the open circuit voltage?
• If you connect a DVOM in reverse polarity while trying to read current, what will you see?
• Why should technicians follow a proven testing plan when diagnosing electrical circuits?
• If a DVOM is set to the 200 milliamp scale and the current increases to 2.5 amps, what is the meter likely to do?
• Which of the following is not a mechanical failure for a power window system?
• When the alternator is operating, the expected battery terminal voltage is around which range?
• Which statement about the heated mirror defogger is correct?
• Magnetic pickups are used in which automotive systems?
• Circuit breakers trip due to which mechanism described in the material?
• Which statement is correct?
• Wiper delay time and intermittent wiper systems: which statements are true?
• OBD II was mandated for all vehicles sold in the United States in 1996.
• Why is a relay typically used in a power window system?
• Memory seat systems typically operate in which gear positions?
• When measuring a circuit, the voltage drop measures the
• The only sound that occurs when the horn button is pressed is a clicking noise from beneath the hood. This could mean that:
• Which statement is correct about using standard bolts as battery terminal adapters with testing equipment and about attaching cable connections to the battery terminals?
• Open circuit voltage at about 25% state of charge is approximately which value?
• One advantage of performing a pre-scan is that it can identify whether damage is related or unrelated to the collision.
• Ignition coils can be described as which device?
• What is recommended to help realign the windshield wiper blades?
• If a connector is referenced twice in a wiring diagram for the same circuit, what does that imply about the connector?
• In a parallel circuit, if two bulbs each draw 3 amps and an instrument panel lamp draws 1 amp, the total current in the circuit is:
• In the I-CAR five-step troubleshooting flow, tracing a wiring circuit is a common step for which activity?
• The power sliding door initialization procedure serves what purpose?
• Which statement about voltage is true?
• Electrical circuits use all of the following except which?
• The claim that modern diagnostics can identify a bent sensor bracket is false.
• In a circuit with an open switch, which statement is true?
• Performing a pre-repair scan can help identify structural repairs required.
• If voltage decreases and resistance remains the same, what happens to current?
• How many steps are contained in the I-CAR trouble-shooting flowchart?
• Which scan is used to clear the digital footprint or codes recorded during repair?
• A blower motor fuse blows after replacing the motor. The problem could be:
• Which of the following may be required to calibrate the front mounted radar on a vehicle?
• In any electrical circuit there can be which of the following relationships between voltage and current?
• The mileage acquired from the time the code first was set to when the scan is performed can typically be found in the freeze-frame data.
• When a wiper motor shows 0 volts under operation, the most likely fault is:
• Which statement about seat heater bonding is correct?
• Technician A says that the rear defogger and heated mirror system operate on the same circuit. Technician B says that a heated mirror heating element can be repaired similar to a rear defogger grid. Who is right?
• When measuring voltage in the circuit example, which instrument displays the reading?
• What does amperage describe in an electrical circuit?
• What is the effect of reversing polarity when measuring current with a DVOM?
• All of these may cause windshield wiper chatter except which?
• Testing a motor in a circuit: which statement is correct?
• If a blower motor does not run, where is the best first voltage check location?
• Post-scans are described as allowing the facility to erase the digital footprint of the repair.
• Which protective device is used in some wiper systems to protect the motor from overloads?
• Diagnostic SOPs provide benefits across roles. Which of the following is a benefit?
• A fuse blows immediately after replacement. The cause could be:
• What is the temperature sensitive resistor used to monitor seat temperature called?
• Which electrical fault is most likely if a rear wiper will not turn off?
• Electrical circuits utilize all of the following characteristics except which?
• Motor circuits are likely to be protected by a circuit breaker because:
• Which statement about removing a battery during testing is correct?
• The digital footprint or codes set during the repair can be cleared with a post-repair scan.
• Following an airbag deployment, which component damage can cause the horn to be inoperative?
• What term describes a device in an electronic circuit that, when energized, moves mechanical linkages?
• The digital footprint in repair data refers to codes recorded during repair that can be cleared after the repair.
• To mount the regulator to the door, which statement is correct?
• Which statement about voltage drop in a series circuit is true?
• The depressed park feature is designed to drop the windshield wipers below the lower windshield trim. The depressed park feature requires a separate motor on the windshield wiper assembly. Who is right?
• The collision area approach to repair includes initiating fault identification in the area of impact.
• In some wiper systems, how does the delay time respond to vehicle speed?
• Which of the following statements about wiper system diagnostics are correct?
• An example of a rheostat is:
• How Many Milliamperes Are In 0.004 Amperes?
• To measure resistance using an ohmmeter, the part must be
• In a VAT battery load test, the current draw should be approximately half the CCA rating.
• Which of the following is an expression of Ohm's Law?
• When performing resistance measurements, which statement is correct?
• Which component monitors obstructions for the Express Up feature?
• What is the term for the part of the circuit from the load's negative terminal to ground?
• Which list best describes the kinds of DTC statuses viewable through Toyota TechStream?
• In a parallel circuit, how does the total current relate to the currents in each branch?
• Why are motor circuits commonly protected by a circuit breaker?
• Using a battery maintainer during diagnostic scans can prevent which of the following?
• The Diagnostic SOP Checklist recommends performing a visual inspection as the first step.
• Which of the following can an aftermarket scan tool do?
• Twisted wires are used to:
• Wiper motor speed control: which statements are correct?
• Post-scans allow the facility to erase the digital footprint of the repair.
• In a ground-side switched rear wiper circuit, a voltage reading at the ground-side connector shows full source voltage. What is the most likely interpretation?
• In a circuit with two bulbs, if the switch is operated as described and the circuit is complete, which statement is true about the ammeter placement?
• Relying on the dash indicator lamps to identify problems in the electrical system is not an acceptable practice.
• The fuse blows as soon as the cigarette lighter is pushed in. The problem is likely a:
• A flow chart says that a circuit is formed between terminals 3 and 8 with the switch in the UP position. This can be checked, without disconnecting the switch from the circuit, by using a:
• An amplifier booster that draws 20 amps is wired in parallel to the stereo system circuit on a vehicle. This will:
• The I-CAR Electronics Checklist can be used for all of these EXCEPT which?
• Technician A says that an electronic circuit uses high current. Technician B says that an electrical circuit uses low current. Who is right?
• Which of these is considered an excessive voltage drop? 1.2V across the circuit protection
• In the seat track assembly, which components are typically serviceable?
• A short to ground on the ground side of the trunk lid solenoid may not directly affect the circuit. Which statement aligns with this scenario?
• Which statement about sunroof timing is correct?
• Where would the voltmeter read full source voltage in a single-load circuit?