A.S.E. L3 Test Preparation

L3 Test Question 1

How many cylinders are de-activated on the 2006 and up Honda Civic Hybrid?

A. 1 cylinderB. 2 cylinder C. 3 cylinderD. 4 cylinder

The Correct answer is “D” since Honda deactivates all cylinders from 2006 and newer.

L3 Test Question 2

What is the first step you perform in a 12 volt compression/start test on a Gen 1 Honda IMA?

A. Turn off the IMA switchB. Turn off the ignition switchC. Remove the 15 amp ignition fuseD. Turn on the IMA switch

The correct answer is “A” since the Honda has a conventional starter, the IMA must be turned off.

L3 Test Question 3

The Honda VPS (valve pausing system) aids fuel economy by?

A. Controlling oil flow to the crankshaftB. Delaying transmission shift pointsC. Controlling oil flow to the rocker armsD. All the above

The correct answer is “C”. Honda uses this system to deactivate the valve.

L3 Test Question 4

Technician A says “inspection mode” is used to bypass the HV (High voltage) system. Technician B says “inspection mode” is used to shut the ICE off. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “A”. HV is shut off to keep ICE running for engine diagnosis.

L3 Test Question 5

Technician A says all hybrid vehicles have “Inspection Mode.” Technician B says most hybrid vehicles have “Inspection Mode.” who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “B”. For parallel systems.

L3 Test Question 6

In order for a hybrid vehicle to be in the Auto stop/Idle Stop it has to:

A. Be at the correct temperatureB. Meet other criteriaC. Both A and BD. Neither A nor B

The correct answer is “C”. It has to reach temperature and meet other criteria.

L3 Test Question 7

What prevents a hybrid vehicle from going into Auto stop/Idle Stop?

A. The turn signal is activeB. The brake pedal is depressedC. The accelerator pedal is depressedD. None of the above

The correct answer is “C”, if the accelerator pedal is pressed it will not enter idle stop.

L3 Test Question 8

Which of the following can cause a Honda IMA hybrid vehicle from achieving the correct fuel economy?

A. The wrong engine oilB. The wrong engine antifreeze/coolantC. A blown 20 amp IMA fuseD. Both A and C

The correct answer is “D”. IMA needs the correct oil and if the fuse is blown the ICE does all work.

L3 Test Question 9

Which of the following will cause a “No Start” on a Toyota hybrid vehicle?

A. Incorrect oil used in the ICEB. HV (High Voltage) battery below 30% SOCC. Open in interlock signal circuitD. “Ready” light illuminated on dash

The correct answer is “C” an open in the interlock will prevent the MG from working, and since there is no “starter” the ICE will not start.

L3 Test Question 10

Technician A says a Prius that has the engine oil level over filled may not start. Technician B says a Prius that has run out of fuel may not start. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C” both no fuel too much oil, will cause a no start.

L3 Test Question 11

Technician A says that an SMR (System Main Relay) can prevent a hybrid vehicle from starting. Technician B says most hybrid vehicles have at least two SMR’s. who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C”.

L3 Test Question 12

Most hybrid vehicles use an:A. Otto cycle engineB. Atkinson cycle engineC. Walthham cycle engineD. Faulkner cycle engine

The correct answer is “B”.

L3 Test Question 13

Technician A says when performing a compression test on the ICE, a standard compression test procedure can be used. Technician B says a special procedure using a CAT III DMM is used. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “D”. Crank mode is needed.

L3 Test Question 14

Which of the following is absolutely necessary for your shop to have when working on a hybrid high voltage system?

A. Lineman’s 1000 volt class “0” glovesB. CAT III DMMC. Both A and BD. Neither A nor B

The correct answer is “C” both are required.

L3 Test Question 15

Technician A says that the high voltage gloves should be rated at 1000 volts or class “0”. Technician B says that leather glove covers should be worn over the rubber gloves. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C” both are correct.

L3 Test Question 16

If a hybrid vehicle “Ready” light is illuminated and the, ICE is not running what may happen?

A. The ICE may start due to the low 12 volt battery voltage

B. The ICE may start due to low high voltage battery voltage

C. Both A and BD. Neither A nor B

The correct answer is “B” the ICE may start

L3 Test Question 17

All of the following are considered necessary safety equipment for working on hybrids EXCEPT?

A. High voltage rescue poleB. Lineman’s class “0” glovesC. Leather work apronD. Eye protection

The correct answer is “C” a work apron is not necessary.

L3 Test Question 18

Before working on a hybrid high voltage system you should:

A. Test the HV gloves for leaksB. Test the 12 volt batteryC. Verify that the vehicle is in the “Ready” modeD. None of the above

The correct answer is “A” always check your gloves before using them.

L3 Test Question 19

Orange wires on a hybrid vehicle indicates that the voltage is at least:

A. 12 voltsB. 36 voltsC. 60 voltsD. None of the above

The correct answer is “C”. Orange indicates at least 60 volts.

L3 Test Question 20

A “Full” hybrid vehicle is defined as one:A. That utilizes an electric motorB. That an be driven in “electric only” modeC. That has Idle stopD. That utilizes a high voltage electric motor to

provide engine start/stop.

The correct answer is “B”

L3 Test Question 21

Technician A says that a Micro hybrid vehicle utilizes a Motor/Generator to provide engine stop/start. Technician B says that a Mild hybrid vehicle uses a Motor/Generator to provide additional torque to the engine. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C”

L3 Test Question 22

The most common hybrid vehicle design is a:A. Series B. ParallelC. Series-ParallelD. Parallel-Series

The correct answer is “C” Series-Parallel. This style offers high voltage charging while providing electric propulsion.

L3 Test Question 23

The Chevy Volt is an example of a _____ hybrid design.

A. SeriesB. ParallelC. Series-ParallelD. Parallel-Series

The correct answer is “A”. The Volt is the only extended range hybrid that is series…..at this time.

L3 Test Question 24

The Toyota Prius is an example of a ________ hybrid design.

A. SeriesB. ParallelC. Series-ParallelD. Parallel-Series

The correct answer is “C”. It utilizes a power-split device that allows torque for propulsion from ICE and MG1 and MG2.

L3 Test Question 25

Technician A says that the GM BAS system is an example of a Mild hybrid. Technician B says that a Micro hybrid vehicle uses two Motor/Generators. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “A”. Micro only has one MG

L3 Test Question 26

What test should be performed to find out whether a high voltage wire is leaking voltage?

A. Insulation testB. Voltage drop testC. Hertz testD. Dynamic resistance test

The correct answer is “A”. Insulation test using a megohm meter or a “Megger”.

L3 Test Question 27

Before towing a hybrid, what precautions should you take?

A. Make sure the system is in “off” modeB. Chock the wheelsC. Use the right kind of two truckD. All the above

The correct answer is “D” all the above.

L3 Test Question 28

High voltage cables carrying 60 volts or more are what color?

A. BlackB. OrangeC. RedD. Blue

The correct answer is “B” orange.

L3 Test Question 29

Technician A says that a safe working voltage on a hybrid vehicle is anything under 60 volts. Technician B says that a safe working voltage on a hybrid vehicle is anything under 15 volts. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “B” anything under 30 volts.

L3 Test Question 30

What color are high voltage cables carrying less than 60 volts but more than 30 volts?

A. BlackB. OrangeC. RedD. Blue

The correct answer is “D” blue. (although not standardized)

L3 Test Question 31

Isolating the high voltage battery from the system means?

A. Turning off the ignition switchB. Turning off the HV switchC. Removing/disconnecting the HV safety plugD. All the above

The correct answer is “D” all the above. And keep items 15 feet away.

L3 Test Question 32

Technician A says that you should wait 5-10 minutes after isolating the high voltage battery before servicing the high voltage system or components. Technician B says you should always verify with a CAT III DMM that the system is powered down. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor BThe correct answer is “C”.

L3 Test Question 33

The Honda IMA hybrid shut off switch is?A. Located behind the rear seatB. Located in the trunkC. Is colored whiteD. Is colored orange

The correct answer is “A” it is behind the seat and black.

L3 Test Question 34

The Toyota Prius hybrid service plug is:A. Located behind the front seatB. Located under the hoodC. Is colored orangeD. Is colored blue

The correct answer is “C” it is orange and in the trunk.

L3 Test Question 35

Technician A says that a Ford Escape hybrid has an extra high voltage shut off. Technician B says that a Ford Escape has a service plug that needs to be removed and placed in the service/shipping position. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C” there is also a inertia sw.

L3 Test Question 36

To isolate the high voltage system on most hybrids, what should be done?

A. Disconnect the cables connected to the 12 volt battery

B. Remove, disconnect, or turn service plug offC. Make sure the vehicle ignition is offD. Keep the smart key in your pocket.

The correct answer is “B” although we recommend disconnecting the 12 volt system.

L3 Test Question 37

Hybrids high voltage systems that are liquid cooled use what type of coolant?

A. Conventional IAT antifreezeB. DexcoolC. OEM specifiedD. Water only

The correct answer is “C” always use what is specified in the service manual, with distilled water.

L3 Test Question 38

NiMH batteries are less forgiving than conventional lead acid batteries because:

A. NiMH batteries need to be cooledB. NiMH batteries cannot be overchargedC. NiMH batteries cannot be underchargedD. Balance of the cells is critical to performance.

The correct answer is “D” cell balance is critical.

L3 Test Question 39

Technician A says that all hybrid high voltage batteries use cylindrical cells. Technician B says that all hybrid high voltage batteries use prismatic cells. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “D”, hybrid use both.

L3 Test Question 40

Toyota Prius HV batteries use _______ cells?A. Cylindrical B. PrismaticC. Both A and BD. Neither A nor B

The correct answer is “B”.

L3 Test Question 41

What HV battery does the Gen 1 Honda insight use?

A. A 128 volt cylindrical NiMH batteryB. A 144 volt cylindrical NiMH batteryC. A 128 volt cylindrical LiON batteryD. A 144 volt cylindrical LiON battery

The correct answer is “B” 144 volt cylindrical NiMH battery.

L3 Test Question 42

Toyota Prius HV batteries have a charge/discharge range of?

A. 20 to 60 percent SOCB. 40 to 60 percent SOCC. 40 to 80 percent SOCD. 20 to 100 percent SOC

The correct answer is “C”. 60% is ideal, it can have a swing from 40 to 80 percent SOC.

L3 Test Question 43

High voltage cell pack voltage can be checked using a scan tool on?

A. 2006 MY and up Honda IMAB. All Toyota hybridsC. All Ford hybridsD. All the above

The correct answer is “D” (depends on scan tool)

L3 Test Question 44

Technician A says some hybrids use a vehicle’s A/C system to cool the HV battery. Technician B says some hybrids use a dedicated blower to cool the HV battery. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C” both.

L3 Test Question 45

A hybrid Series-Parallel design is:A. A hybrid that uses a power-split device.B. A hybrid design that is used on Toyota, Ford

Nissan and many others.C. Both A and BD. Neither A nor B

The correct answer is “C”. This design allows one MG to power the other using the ICE.

L3 Test Question 46

A “Full Hybrid” style vehicle is:A. A hybrid vehicle that uses one MGB. A hybrid that an move the vehicle with no ICE

assist.C. A hybrid that can move the vehicle with ICE

assistD. A hybrid vehicle that has no Idle Stop.

The correct answer is “B”.

L3 Test Question 47

Technician A says that most hybrids have a separate cooling system for the HV electronics. Technician B says that most hybrids use the same cooling system as the engine. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “A”. MECS is separate.

L3 Test Question 48

The Prius uses an inverter pump that does what?

A. Cools the MGB. Cools the AC/DC inverterC. Cools the DC/DC converterD. All the above

The correct answer is “D” all the above.

L3 Test Question 49

Ford, Toyota, and Nissan hybrids have a “heater circulator pump” that is used:

A. With Autostop/Idle StopB. Specifically when the ICE is engagedC. Only when the water pump is brokenD. Non of the above

The correct answer is “A”. Coolant is circulated in Idle Stop with this 12 volt pump.

L3 Test Question 50

Technician A says a hard bump to the rear of a Ford hybrid can cause the HV system to shut down. Technician B says that a loose tire jack in the rear of a Ford hybrid can cause the HV system to shut down. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C”. Bumps affect inertia sw.

L3 Test Question 51

What causes a Ford Escape hybrid to display “Stop Safely Now” on the dash?

A. A HV overheating problemB. A failure in the 12 volt systemC. An overheating ICED. A fuel level below ¼ tank

The correct answer is “A”. HV overheating.

L3 Test Question 52

A technician is dealing with a HV battery overheating concern on a Honda IMA. He notes that there are several packages and a few coats stacked on the rear window deck. Could this be the cause of overheating the IMA?

A. Yes, because this is location of air intakeB. Yes, because this is location of air outletC. No, because battery is liquid cooledD. No, because there is no relationship.

The correct answer is “A” blocking the air intake

L3 Test Question 53

The HV battery produces DC voltage, and the MG outputs AC that is converted to DC by the:

A. InverterB. ConverterC. AlternatorD. Battery Control Module

The correct answer is “A” inverter.

L3 Test Question 54

Technician A says the converter converts AC voltage to DC. Technician B says the converter takes HV DC and converts it to low voltage DC. Who is correct?

A. Technician A B. Technician BC. Both A and BD. Neither A nor B

The correct answer is “B”.

L3 Test Question 55

What charging current rate is suggested for the 12 volt Prius battery?

A. 2.5 ampsB. 3.5 ampsC. 4.5 ampsD. 5.5 amps

The correct answer is “B” AGM batteries require less than 3.5 amps and less than 14.4 volts when charging.

L3 Test Question 56

The Toyota Prius hybrid requires a _____ 12 volt battery.

A. Lead acidB. Maintenance free Lead acidC. NiMH D. AGM

The correct answer is “D” AGM. Absorbed Glass Mat.

L3 Test Question 57

Technician A says you can use a lead acid 12 volt battery in a Toyota Prius. Technician B says if you use a lead acid battery you may encounter DTC’s. who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer “B”

L3 Test Question 58

Technician A says you can use a lead acid 12 volt battery in a Honda IMA. Technician B says you must use an AGM 12 volt battery. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “A”.

L3 Test Question 59

The Toyota Prius uses:A. One MGB. Two MG’sC. One AC motor and one AC generatorD. None of the above

The correct answer is “B” two MG’s that can operate as motors or generators.

L3 Test Question 60

Technician A says a Gen 2 Prius uses an inverter that has three 450 volt capacitors. Technician B says a Gen 1 Prius uses an inverter that has two 600 volt and one 750 volt capacitor. Who is correct?

A. Technician A B. Technician BC. Both A and BD. Neither

The correct answer is “C” both.

L3 Test Question 61

What is considered a “safe” voltage level?A. No voltage level is safe.B. Five or less voltsC. Ten or less voltsD. Fifteen or less volts

The correct answer is “D”. 30 or less volts is “safe”.

L3 Test Question 62

Technician A says all hybrid vehicles use a HV electric air conditioning compressor. Technician B says some hybrid vehicles use a combination belt-driven/HV compressor. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “B”.

L3 Test Question 63

Technician A says Toyota DTC’s have information codes that must be used to diagnose the DTC. Technician B says Toyota DTC’s have sub-codes that must be used to diagnose the DTC. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C” both.

L3 Test Question 64

Technician A says a special oil must be used in HV electric air conditioning compressors. Technician B says that if the incorrect oil is used, every component in the system must be replaced. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C”.

L3 Test Question 65

On Gen 1 Toyota Prius hybrids, if the yellow “turtle” warning light illuminates on the dash, it means:

A. The HV battery has a low charge levelB. The vacuum reservoir is leakingC. The ICE has a faultD. The MG’s are inoperative

The correct answer is “A”. It also comes on for incorrect temperature, limiting acceleration.

L3 Test Question 66

Technician A says a Gen 2 Prius uses a conventional brake booster for the brake system. Technician B says a Gen 2 Prius uses high volt capacitors instead. Who is correct?

A. Technician A B. Technician BC. Both A and BD. Neither A nor B

The correct answer is “B”.

L3 Test Question 67

Technician A says a Gen2 Prius can be jump started from under the hood. Technician B says a Gen 2 Prius can be jump started from the trunk area. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C” there is a spot at both.

L3 Test Question 68

To start a Gen 2 Prius you have to:A. Press the Power button twice while depressing

the brake pedalB. Press the Power button once while depressing

the brake pedalC. Hold the Power button while depressing the

brake pedalD. None of the above

The correct answer is “B”

L3 Test Question 69

Which switch can prevent the Auto Stop/Idle Stop feature from functioning on the Chevy Volt?

A. Trunk-switchB. Gas-switchC. Hood ajar-switchD. None of the above

The correct answer is “C”.

L3 Test Question 70

Technician A says to jump start a Ford Escape hybrid, you have to attach the jump leads to the 12 volt battery. Technician B says you can press a button that is located behind the left front kick panel. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C” (1st Gen Escape only)

L3 Test Question 71

Technician A says when working on a Ford Escape hybrid there are special service precautions for EPS. Technician B says there are special service precautions for brake system. Who is correct?

A. Technician A B. Technician BC. Both A and BD. Neither A nor B

The correct answer is “B”.

L3 Test Question 72

Technician A says you must put a Ford Escape hybrid in “safe brake service” mode before attempting to work on the brake system. Technician B says failure to follow correct procedure could result in injury to the tech. who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor BThe correct answer is “C”.

L3 Test Question 73

The Civic hybrid uses what form of power steering?

A. HydraulicB. EPS (Electric)C. Integrated system (both)D. None of the above

The correct answer is “B”.

L3 Test Question 74

Technician A says on a Toyota Prius, a dark “power” button indicates the vehicle is ready to drive. Technician B says you must look at the status of the “ready” indicator to determine if the vehicle is ready to drive. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C”

L3 Test Question 75

On a Toyota hybrid, a “Power” button with amber illumination indicates:

A. The vehicle is in “ready” modeB. The vehicle is in accessory modeC. The vehicle is offD. None of the above

The correct answer is “B”

L3 Test Question 76

Technician A says that a Toyota Prius must be put into inspection mode in order to test the ICE. Technician B says that inspection mode is used to test the lights and wipers. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “A”.

L3 Test Question 77

Technician A says Auto stop means the hybrid vehicle has the capability to come to a full stop on its own. Technician B says that Auto stop is another term for Idle Stop, shutting down the ICE when at a stop. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor B

The correct answer is “B”. Pending criteria

L3 Test Question 78

A hybrid vehicle equipped with push button start will enter the Power On (KOEO) mode, but will not enter the “Ready” mode. No DTC’s are stored. This could be caused by:

A. High voltage safety plug removedB. Failed brake on/off switchC. Empty fuel tankD. Disconnected 12 volt battery

The correct answer is “B”.

L3 Test Question 79

Technician A says after disabling the high voltage battery system, a special DMM is required to confirm voltage levels are safe. Technician B says removing the 12 volt negative battery cable will make HV system safe. Who is correct?

A. Technician AB. Technician BC. Both A and BD. Neither A nor bThe correct answer is “A”

L3 Test Question 80

L3 Test Question 80

A Type 1 vehicle will enter “Ready” mode, but will not crank the ICE. When the vehicle is pushed in neutral the engine spins. Which could be the cause?

A. Depleted High voltage batteryB. Seized MG2C. Failed Crankshaft sensorD. Seized Planetary gear set.

The correct answer is “D”

L3 Test Question 81

During deceleration, the arrows on the power flow display move from the wheels to the motor to the battery. This indicates:

A. ICE running with energy flowing to wheelsB. ICE running and driving MG to rechargeC. Energy is blended from ICE and MG to wheelsD. Energy from wheels is recharging HV battery.

The correct answer is “D”. Regenerative braking

L3 Test Question 82

A Type 2 vehicle with a belt-type continuously variable (CVT) bucks and jerks when accelerating. Tech A says wrong type of fluid could cause this. Tech B says the steel belt could be the cause. Who is correct?

A. Technician A B. Technician BC. Both A and BD. Neither A nor B

The correct answer is “C” both.

L3 Test Question 83

The MIL is illuminated and a “Battery Module Deterioration” DTC is stored. This is caused by:

A. High voltage batteryB. High voltage inverterC. Motor/GeneratorD. DC/DC converter

The correct answer is “A”…Cut and Dry!

L3 Test Question 84

The internal resistance of a HV battery block should be:

A. 15-40 milliohmsB. 45-60 milliohmsC. 70-110 milliohmsD. Over 110 milliohms

The correct answer is “A”.

L3 Test Question 85

A Toyota Prius hybrid will not turn off, it remains in “Ready” mode. This could be caused by the following;

A. Faulty brake switchB. Low SOCC. Faulty electric park motorD. None of the above

The correct answer is “C”.

L3 Test

Please, please, please also review the L3 practice test at the end of your text book. Use that practice test as a study guide for both the final and the A.S.E L3 test.

Note: you must also be certified in A6 (electric) and A8 (performance) to be eligible to take the L3 hybrid test.

L3 Test

L3 Test Answer KeyPlease refer to power point PDF for answer explanations

21. C22. C23. A24. C25. A26. A27. D28. B29. B30. D31. D32. C33. A34. C35. C36. B37. C38. D39. D40. B

41. B42. C43. D44. C45. C46. B47. A48. D49. A50. C51. A52. A53. A54. B55. B56. D57. B58. A59. B60. C

61. D62. B63. C64. C65. A66. B67. C68. B69. C70. C71. B72. C73. B74. C75. B76. A77. B78. B79. A80. D

81. D82. C83. A84. A85. C

1. D2. A3. C4. A5. B6. C7. C8. D9. C10. C11. C12. B13. D14. C15. C16. B17. C18. A19. C20. B