L3
A Type-2 hybrid vehicle without an auxiliary starter will enter READY TO DRIVE (KOER- Key ON Engine Running) mode but will not crank the ICE (Internal Combustion Engine). Which of the following is likely the cause? • a. Depleted high voltage battery • b. Failed MG (Motor Generator) • c. Failed crankshaft position sensor d. Failed MG2 (Motor Generator 2)
B (The MG works as the starter motor for the ICE. Some Type-2 vehicles may be equipped with an auxiliary 12 V starter motor but the stem states that this vehicle does not have one. Power flow to the drive wheels can be provided by a split-pulley/steel belt continuously variable transmission, a conventional automatic transmission, or a standard transmission.)
On a Type-3 PHEV, the high-voltage battery pack falls to a predetermined state-of-charge (SOC), but the internal combustion engine (ICE) fails to start and it is in the READY TO DRIVE (KOER) mode. Which of the following is the most likely cause? • a. Depleted high voltage battery • b. Seized MG1 • c. Failed crankshaft position sensor d. Failed MG
B (The MG1 serves as the starter motor for the ICE.)
What tool is used to locate and diagnose a high voltage leak or loss of isolation on Type-3 PHEV battery? • a. CAT III-certified DMM (digital multimeter) • b. Megohmmeter • c. DSO (Digital Storage Oscilloscope • d. Factory level aftermarket scan tool
B (The other three tools listed cannot perform this measurement.)A megohmmeter is an electric meter that measures very high resistance values by sending a high voltage signal into the object being tested. Typically, however, this is the only function a megohmmeter performs. The Fluke 1587 FC insulation multimeter, for example, can perform insulation tests up to 1000 volts, and it is a full-function digital multimeter. The Fluke 1550C FC can generate up to 5000 volts for insulation tests
If an HEV or PHEV "Ready" light is illuminated and the ICE is not running, what may happen? A) The ICE may start due to low 12-volt battery B) The ICE may start due to low HV battery voltage C) Both A and B D) Neither A nor B
B (When working on HEV/PHEV be careful because if the vehicle displays ready at anytime when the HV battery gets low it'll turn the ICE on)
The inverter on a Type 1 HV battery is cooled by? A. Air cool B. Water cool
B (and it's hard to bleed.)
Technician A says you can use a DMM (Digital Multimeter) ohmmeter function to check the resistance between negative and ground while cranking the starter. Technician B says to check the voltage drop between (+) positive and the starter terminal stud while the starter is cranking. Who is right? • a. A only • b. B only • c. Both A and B d. Neither A nor B
B (can't testing ohm while the circuit is live because it'll give out false readings)
Rubber gloves should be worn whenever working on or near the high-voltage circuits or components of a hybrid electric vehicle. Technician A says the rubber gloves should be rated at 10,000 volts or higher. Technician B says that leather gloves should be worn over the high-voltage rubber gloves. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
B (incorrect because HEVs and PHEVs can have voltages up to 500 volts, so gloves rated at voltages over 500 are appropriate not 10,000 volts.)
A Type-3 PHEV had a Lithium ion battery failure. Technician A says that operating the cells in the 2-4 volt range could be the cause. Technician B says that operating the cells outside 32° to 176°F could be the cause. Who is right? • a. A only • b. B only • c. Both A and B d. Neither A nor B
B (operating the cell outside 2-4V will cause failure.
There is one type of failure that will not set a diagnostic trouble code (DTC) on an ICS engine used in a Type-1 HEV and it can occur when: a. The engine misfires on a Type-3 PHEV or Type-1 HEV. • b. Voltage from the heater circuit bleeds into the Nernst cell. • c. The Catalytic converter is plugged. • d. There is a stuck open EVAP purge valve.
B (this will cause the vehicle to run LEAN. It might or might NOT cause the CEL.
A Honda Type-2 Insight HEV hybrid that uses a belt-type CVT (Continuously Variable Transmission) exhibits bucking, slipping and jolting during acceleration from a complete stop. Technician A says that using the wrong automatic transmission fluid could be the cause. Technician B says that a defective CVT split pulley could be the cause. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
C
A type-1 HEV stalls while driving with DTC P0A93 "Inverter "A"* Cooling System Performance", but if you let it cool down, the HEV will drive again. Technician A says that the inverter may be overheating. Technician B says you can check for inverter turbulence. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
C
All of the following are considered necessary safety equipment for working on HEV, PHEV or EVs ЕХСЕРТ? A) HV rescue pole B) Lineman's Class "0" gloves C) Leatherwork apron D) Eye protection
C
Technician A says that a Micro HEV utilizes an MG to provide ICE stop/start. Technician B says that a Mild HEV uses an MG to provide additional torque to the ICE. Who is right? A) Technician A B) Technician B C) Both Technicians D) Neither Technician
C
Technician A says you can use an ohmmeter function of a DMM (Digital Multimeter) to check the resistance of the negative ground cable end to end with the battery positive terminal disconnected. Technician B says to check the voltage drop between (+) positive and the starter terminal stud while the starter is cranking. Who is right? • a. A only • b. B only • c. Both A and B • d. Neither A nor B
C
What type of clothing should be worn by a technician when performing HEV/PHEV high voltage systems service? • a. Wool • b. Synthetic material • c. Cotton • d. Nylon
C
When an inverter water pump is being replace, how do you cover the connectors. A. Shop rag B. Cloth C. Insulating tape D. Neither
C
Technician A says a Toyota Type-1 HEV that has the ICE oil level over filled may not start. Technician B says a Toyota Type-1 HEV that has run out of fuel may not start. Who is right? A) Technician A B) Technician B C) Both A and B D) Neither A nor B
C ( Over filling a ICE will cause p3101, if the Prius has a bladder tank (04-09) you'll need to add fuel slowly in order for it to start after clearing DTC)
What color is used for 42V ? • a. Blue • b. Yellow • c. Both a and b • d. Orange
C (Blue or yellow are used for 42 volts, which are not a shock hazard but an arc will be maintained if a circuit is opened.
What type of automatic transmission fluid is used in a GM Mode 2 Type HEV? a. Dexron V Fluid b. Specified CVT Fluid c. Dexron VI Fluid d. Mercon-Lv Fluid
C (Dexron 5 is out dated for EV)
Technician A says that a System Main Relay (SMR) can prevent an HEV or PVEV from powering on to the "Ready" mode. Technician B says most HEVs, PHEVs, and EVs has at least three SMRs. Who is right? A) Technician A B) Technician B C) Both A and B D) Neither A nor B
C (Most use 3 some older use two)
A customer complains about constant heat out of the air ducts with normal air conditioning pressures and operation. All of the following could be the cause, except: a. Blend door adjustment b. Defective heater control valve c. Defective thermostat D. Heater control cable adjustment
C (The other three choices can cause constant heat in the cabin.)
When removing the high voltage battery pack from a Type-1 hybrid electric vehicle, which of the following is performed? a. The high voltage battery pack is being removed through the front of the vehicle. b. The high voltage wires are removed from the battery pack while wearing latex gloves. c. Ignition is off and negative battery cable removed from auxiliary battery d. The high voltage battery pack is placed on a steel workbench.
C (To depower the high-voltage system, the ignition must be off and the negative battery cable must be disconnected from the 12-volt auxiliary battery, then the high voltage battery safety plug is removed.
Which of the following will cause a "No Start" condition on a Toyota Type-1 HEV? A) Incorrect oil used in the ICE B) HV battery below 80% State of Charge (SOC) C) Open in Interlock Signal Circuit D) "Ready" light illuminated on the dash
C (an open in the interlock circuit will prevent the SMR's (System Main Relay) from closing, this will prevent the motor/generator from starting.
United States Federal Motor Vehicle Safety Standard (FMVSS) 305 defines high voltage on an automobile as "a working voltage greater than: A) 50V AC or 50V DC B) 30V DC or 60V AC C) 30V AC or 60V DC D) None of the above
C (most manufacturers recommend use of PPE with a working voltage higher than 50V DC OR 50V AC
Both type 2 and 3 if the battery is depleted it'll enter ? A. Not ready to drive B. Nothing C. Ready to drive D. Both a and b
C (vehicle will enter READY TO DRIVE (KOER) mode, so voltage is available Equivalent to KOER - Key On/Engine Running. In this mode, the vehicle is ready to drive. The engine is running, or is OFF and ready to run if so commanded.)
A "Full" HEV or PHEV is defined as one: A) That utilizes an electric motorS) B) That can be driven in "electric-only" mode C) That has Auto Stop/Idle Stop D) all of the above
D
In Hybrid Electric Vehicles and Plug-In Hybrid Electric Vehicles, what color plastic conduit identifies 144 to 600 voltage cables? • a. Blue • b. Red • c. Yellow • d. Orange
D
Scan data indicates that the SGCM (Starter-Generator Control Module), which has its own cooling system on a Type-2 HEV, has overheated. Which of the following could not be the cause? a. Low coolant level b. Inoperative fan c. Faulty electric pump d. Thermostat closed
D
Type 1 has ? A. MG1 B. MG2 C. Planetary gears D. All the above
D
Type 2 has ? A. MG1 B. MG C. Trans axle ( standard/cvt/auto trans D. B and C
D
When the ignition of an HEV is turned off, how long do you need to wait for the capacitors to discharge before servicing the high-voltage system? a. 60 seconds b. 90 seconds c. 1-2 minutes d. 10 minutes
D
Which of the following holds the secondary drive gear stationary on a Type-2 HEV with a continuously variable transmission? a. Start Clutch b. Forward Clutch c. Reverse Brake d. Parking pawl
D
Which of the following statements is not true regarding molded connector repair of HEV or PHEV wiring if the connector is damaged? a. It must be cut off and replaced. b. it must be separated before making any repairs. c. Special tools are used to remove the terminals. d. Special connectors are not required.
D
Technician A says "Inspection Mode" is used to shut the HV power off. Technician B says "Inspection Mode" is used to shut the Internal Combustion Engine (ICE) off. Who is right? A) Technician A B) Technician B C) Both A and B D) Neither A nor B
D ( Inspection mode on full hybrid vehicles allow the ICE to stay running regardless the state of charge of the the HV battery)
What is the internal resistance of a high-voltage battery block that can be displayed on a factory-level scan tool? • a. Greater than 1 Megohms • b. 70 to 110 milliohms • c. 40 to 60 milliohms • d. 15 to 40 milliohms
D ((0.015 to 0.040 Ohms).
A factory-level scan tool check of the canister purge valve control solenoid on a Type-3 PHEV shows it is always open. Which of the following could be the cause? a. Vacuum source problem b. Vacuum passage restriction c. Broken diaphragm d. Defective engine control unit (ECU)
D (A faulty ECU can cause a purge valve control solenoid to be always open. )
On a type-1 HEV, which of the following disconnects high voltage and fuel in the event of a collision? a. DC-DC converter b. DC-AC inverter c. Front inertia switch d. Rear inertia switch
D (C is incorrect because the front inertia switch disconnects the high-voltage circuit and the electrical circuit to the gasoline fuel pump in a collision.)
The energy monitor screen on a Type-1 HEV shows the driver all of the following, EXCEPT: a. ICE powering the vehicle b. Electric motor powering the vehicle c. ICE charging the high-voltage batteries d. MG1 generating electricity during braking
D (D is the exception because MG1 is used as the starter motor for the ICE, and conversely, it can be driven by the ICE to act as a generator. MG2 also serves as a generator during regenerative braking. The display does not differentiate between the operation of MG1 and MG2)
A Honda Insight Type-2 HEV cranks but will not start after having the spark plugs replaced. Which of the following is most likely the cause? • a. Fuel pressure over 500 psi. • b. The fuel return pipe is restricted. • c. Spark plugs gaped too wide. • d. Indexed spark plugs not used.
D (Indexed spark plugs mean that the side electrode is FACING AWAY FROM the intake valve. Normal spark plugs have the side electrode blocking the spark (electrical arc). Honda has four different spark plugs available for this engine, labeled A, B, C, and D. The specified plug for each cylinder is stamped next to the spark plug opening. The spark plugs also have a letter marked on the top. You have to remove the coil from each cylinder to determine the letter for the plug needed. The indexed spark plugs usually have to be purchased from a Honda dealer.
The mode to keep the ICE running can often be done using a scan tool such as the Snap-on Solus Ultra. This mode is called the? A. Service mode B. Inspection mode C. Maintenance D. All the above
D (Most OEMS warn to not drive the vehicle while in this mode because many of the torque limiting factors are also disabled which could cause damage to the powertrain components if driven aggressively.)
High voltage lineman's rubber glove material can be damaged by coming in contact with which of the following? a. Petroleum products b. Detergents c. Talcum powder d. All of the above.
D (The rubber glove material can be damaged by petroleum products, detergents, certain hand soaps, and talcum powder.)
On a Type-2 HEV, the driver complains of a small hesitation after cruising for 30 minutes at 60 mph, and the hesitation lasts for more than 5 seconds with no DTCs. Which of the following is MOST LIKLEY the cause? • a. Bad spark plug • b. Sticking throttle motor • c. Leaking intake manifold gasket • d. This is a normal condition.
D (The situation described is most likely a normal condition. When the onboard computer determines that the NOx (Oxides of Nitrogen) catalyst is full of NOx, the mixture will be temporarily ENRICHED so that some CO (Carbon Monoxide) can enter the NOx absorption catalyst, react with the NOx, and release CO2 (Carbon Dioxide) and N2. After releasing the CO2 and N2, this special catalytic converter is now cleaned out and ready to absorb more NOX when the engine goes back into lean burn.
The idle stop (auto start/stop function) does not work and the fuel economy has dropped on a Type 2 HEV using NiMH (Nickel Metal Hydroxide Batteries). Scan tool data shows the high-voltage battery block voltages reading ranging from 4.65-15.01 volts with 2 Diagnostic Trouble Codes stored: P0A80-- Replace Hybrid Battery Pack, difference in voltage between two of the blocks in the battery pack is too high and P3006--Uneven state of charge. Which course of action should be followed? • a. Replace the inverter. • b. Recharge the battery pack. • c. Replace the battery monitor computer. • d. Replace the battery pack.
D (There are about 34 battery blocks. Generally, if an individual battery block is under 7.5 volts it cannot be restored to useful service. Even if it can be charged, the battery module will have a short service life. The auto start/stop function) does not work with low battery pack voltage. )
A Type 1 HEV ICE (Internal Combustion Engine) is running extremely lean with no diagnostic trouble codes. Which of the following is a quick test to determine if the problem is the wide band oxygen sensor? • a. Create an engine vacuum leak. • b. Induce propane into the cylinder. • c. Do a power balance test. • d. Unplug the oxygen sensor.
D (both propane and creating a leak will cause a rich condition, power balance is for misfire)
Type 3 has ? A. MG1 B. MG2 C. Clutches to switch back and forth D. All the above
D (using planetary gears.
A Type-1 Toyota HEV will turn on, have warning lights on the dash, but will not go into drive or reverse with DTC P0AA6 voltage isolation fault. Which of the following is done to find the root cause? A. Find the specific sub-code. B. Go through the DTC steps. C. Do a diagnostic circuit check. D. Follow the symptom diagnosis.
A
A mild hybrid electric vehicle (MHEV), also known as a micro hybrid, is a hybrid vehicle that has a smaller battery and less powerful electric motor than a full hybrid, they use a ? A. MG B. MG1 C. MG2 D. Both b and c
A
A technician needs to check for diagnostic trouble codes on a Type-1 HEV without starting the engine. What needs to be done to go into RUN mode? • a. Press the POWER button twice • b. Press the POWER button once • c. Depressing the brake pedal • d. Placing the gear selector in Neutral
A
A type-3 PHEV fuel door will not open and the malfunction indicator lamp is illuminated and P0449 (Evaporative Emission System - Vent Valve / Solenoid Circuit) set. Technician A says that the canister vent valve solenoid may be stuck closed keeping the fuel tank pressurized. Technician B said is that the fuel door should be open with the pressurized fuel tank. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
A
An engine cranks but does not run. What should be looked at first to make a diagnosis? • a. Spark • b. Fuel • c. Engine compression • d. Engine timing
A
An internal combustion engine will not start using the above 3 wire COP (Coil-On-Plug) ignition system. A diagnostic trouble code P0300 Random Misfire Detected is stored. Which of the following is the most likely cause? • a. Open at G107 b. Open at ECM Pin 52 to Pin C of ignition module #2 • c. Defective CMP (Camshaft Position) Sensor O d. Shorted Brown White wire at Pin B of ignition module #4
A
Data Link Connector (DLC) cavities 4 and 16 contain circuits common to all OBD-II vehicles. What are these circuits used for? a. Power and ground b. SAE communications protocols c. ABS diagnostics d. ISO communications protocols Pin 16 is battery voltage and pin 4 is a ground.
A
If the manual disconnect switch was removed the vehicle will___ the power relays? A. Open B. Close
A
Some Type-1 HEVs have the regenerative braking system. To check the integrity of the brake system, there is a self-test where the brake controller will energize the hydraulic control unit and check that pressure can be developed in the system during which of the following actions? a. When a door is opened during wake up b. When the key is placed in the ignition c. When the brake pedal is depressed d. When the transmission is placed in drive
A
The type 1 HV battery should be? A. Place on a wood or rubber mat work bench. B. Both c and d C. Placed on the floor D. Placed on a steel workbench.
A
Type 1 HV battery, is it ? A. Air cool B. Coolant cool
A
Type 2 and 3 HV battery does not use what to start ? A. Crankshaft position sensor B. MG1 C. MG2 D. All the above
A
What is the nominal voltage of a HV battery pack on a Type-1 HEV that you can measure? a. 200 to 300 VDC b. 300 to 400 VDC c. 100 to 200 VDC d. 500 to 600 VDC
A
Which of the following should generally be the first step in the diagnosis of an HEV? a. Discuss the concern with the driver. b. Retrieve diagnostic trouble codes. c. Check for symptoms in the on-line service manual. d. Road test the vehicle.
A
А Type-3 PHEV will not charge and has a diagnostic trouble code POAA6 High Voltage Isolation Fault set with low battery coolant level. Which of the following could be the cause? • a. Hybrid/EV Battery Pack drain plug leakage • b. Auxiliary Battery failure • c. Hybrid battery cooling system overfilled • d. Battery Energy Control Module failure
A
OEMS specify that an electronic conductance tester be used to test batteries in vehicles still under factory warranty. ________ is a measure of how well a battery can create current. This tester sends a small signal through the battery and then measures a part of the AC response. As a battery ages, the plates can become sulfated and shed active materials from the grids, thus reducing the battery capacity. ______ testers can be used to test flooded or absorbed glass mat-type (AGM) batteries. a. Conductance b. Load c. Voltage d. Parasitic load
A ( Conductance (Capacitance)
Which of the following is a quick way to determine the relative health of an engine without requiring the removal of the spark plugs? a. Relative compression test b. Static compression test c. Running compression test d. Snap compression test
A ( To perform a relative compression test, you use a digital storage oscilloscope (DSO) and a current clamp to measure the change in current that occurs when an engine is cranking to determine the relative compression. This relative compression test uses the starter motor current to determine the compression values of all cylinders.)
A Toyota Type-1 inverter with inverter assembly is being replaced. Technician A says that you do not allow any water to enter the inverter with AC/DC inverter assembly. Technician B says that to measure the voltage between the high voltage cable connector terminals, you use measuring range of 300 VDC on the voltmeter. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
A ( put it on 750 V not 300vdc
A CAT III-certified DMM (Digital Multimeter) should be used whenever measuring high-voltage circuits or components. The CAT III rating relates to which of the following terms? a. High voltage b. High Impedance c. High electrical resistance d. Low reluctance
A (600-1000V, The other three choices are characteristic of a DMM but not required for HEV/PHEV high voltages.
A PHEV will enter the POWER ON (Key On Engine Off) mode, but will not go into the READY TO DRIVE (Key On Engine Running) mode. There are no diagnostic trouble codes. Which of the following could be the cause? a. Failed brake on/off switch b. High voltage safety plug is removed c. ICE fuel tank empty d. Disconnected 12-volt auxiliary battery
A (C is wrong because with an empty fuel tank, the vehicle would enter the POWER ON (KOEO) mode and the READY TO DRIVE (KOER) modes as long as the high voltage battery maintains a sufficient state-of-charge. However, the internal combustion engine (ICE) would crank, but would not start due to the lack of fuel in the tank.)
Fluid-level checks on a Type-2 HEV with a CVT (Continuously Variable Transmission) are performed with the vehicle level, transmission up to the operating temperature, but with the: a. engine turned off. b. engine running. c. plug removed on the side of the transmission. d. plug removed on the top of the transmission.
A (Fluid-level checks are performed with the vehicle level, transmission up to the operating temperature, but with the engine turned off, not running as in conventional automatic transmissions. Wipe off the dipstick before removing it to prevent any dirt from falling into the fill tube when checking the level of the fluid. Any dirt in the fluid can cause severe damage to the CVT transaxles. (Dipstick is usually used)
The driver of a Type-3 PHEV is experiencing difficulty adding fuel to his gas tank. Which of the following could be the cause? a. Full level too low b. Defective charcoal canister close valve open c. Defective charcoal canister close valve closed d. Defective EVAP purge valve
A (HEV and PHEV vehicles use a bladder in the fuel tank that expands when fuel is added and if the level is allowed to get too low it may have contracted to the point where fuel is difficult to add.)
Which of the following sensors detects motor generator magnetic pole position on a Type-1 HEV? a. Resolver b. Inverter c. Accelerometer d. Wheel speed
A (Honda, Toyota and Lexus use a speed sensor called a resolver to detect the rotor position. Each coil in the speed sensor (resolver) generates a unique waveform, allowing the motor controller to determine the position of the rotor in the motor. The top waveform is coil, middle waveform, and bottom waveform. The controller uses the three waveforms to determine the position of the rotor.)
A Ford Type-1 HEV suddenly stopped running because both the ICE and electric traction motor had stopped and the only warning light was the "Hot" light. There was no indication of an overheated engine. There was a stored diagnostic trouble code - P0A01 (motor electronics coolant temperature sensor circuit range/performance). Which of the following is the most likely cause? a. Corroded electrical connector at the inverter coolant pump b. Corroded electrical connector at ICE (Internal Combustion Engine) water pump c. Stuck open ICE thermostat d. Stuck closed ICE thermostat
A (P0A01 (motor electronics coolant temperature sensor circuit range/performance) relates to an HEV control systems problem not an ICE problem making b, c, and d incorrect.
Two technicians are discussing a compression test being performed on a Type-1 HEV. Technician A says that you will experience lower compression test results on this type of HEV that uses an Atkinson cycle engine. Technician B says that the Atkinson cycle uses a normal intake stroke, but as the compression stroke is about to start, the intake valve is closed to reduce pumping losses. Who is right? • a. A only • b. B only c. Both A and B d. Neither A nor B
A (Since the Atkinson intake valve stays open longer this will lower the compression ratio, and is 10 percent more efficient. Lower RPM the electric motor will propel the vehicle. Electric motors excel at low RPM torque, so the hybrid transaxle makes up for the low-speed losses of the Atkinson cycle gasoline engine.)
The (ICE) internal combustion engine of a Type-2 HEV (Hybrid Electric Vehicle) will not crank. Technician A says that you need to use a scan tool to monitor the CRANK signal to see if it's going to the ECU. Technician B says that this concern could be caused by a depleted HV battery. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
A (Tech A is correct because if the crank signal is not received by the ECU, the MG or starter motor will not crank the ICE.
Two technicians are discussing the HV Battery Cooling system on a Toyota Type-1 HEV. Technician A says the HV battery pack temperature is monitored in a number of locations on the modules, and cooling fan speed is controlled based on these measurements. Technician B says that refilling the HV cooling system can be a difficult to fill to get rid of all of the air. Who is right? • a. A only • b. B only c. Both A and B • d. Neither A nor B
A (Tech B is incorrect because the HV Battery Pack is air cooled on a Type-1 HEV. The inverter is water cooled. Refilling the inverter cooling system can be hard to get all of the air out because of the many loops and cavities that the inverter coolant travels through.)
The regenerative brakes did not work, when the vehicle was going down a hill and only the base brakes worked with the HV Batteries at 90%. Technician A says that this took place because the controller disabled regenerative braking and used only the base brakes due to a high SOC (State of Charge). Technician B says that the SOC of the batteries is kept below 90% so regenerative braking can occur. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
A (Tech B is incorrect because the SOC of the batteries is kept below 80% so regenerative braking can occur.)
The resistance between the insulated HV circuit and ground should be higher than: A. 1.0-2.2 Megaohms B. 0.5-0.6 Megaohms C. 10- 20 Ohms D. 100 - 400 Ohms
A (The insulation resistance must be very high in Megohms to prevent any leakage. The other answer options are too low. HEV and PHEV high-voltage circuits do not use a common ground. The circuit starts at the positive side of the high-voltage battery pack and returns to the negative side of the pack in a loop)
A customer just purchased an Electric Vehicle Service Equipment (EVSE) certified external off-board charger for their Toyota Prius Type-1 PHEV. The new charger is capable of charging at a maximum rate of 7.68kW, but the vehicle battery is still charging at a slower rate of 3.6kW. Technician A says the vehicle's internal (onboard) charger module controls the maximum charge rate. Technician B says the external off-board EVSE charger controls the maximum charge rate. Who is right? A) Technician A B) Technician B C) Both A and B D) Neither A nor B
A (The slowest rating for charging usually a default for older houses or a connectuon to a circuitr with a shared load. Using their IPC settunfbir app it can be changed ti a higher setting)
Home insight type 2 HEV fuel injection is at ? A. 2500 psi B. 3000 psi C. 500 psi D. 1000 psi
A (and it is a returnless fuel injection system.)
Refilling the inverter cooling system can be a difficult task. Which of the following tools can make this task easier? a. Airlift tool b. Radiator pressure tester c. Syphon pump d. Mityvac
A (it'll perform a vacuum on the entire system)
The ICE of a Type-2 HEV will not crank and will not start. Technician A says to monitor the "Crank" signal with a scan tool to see if it is being received. Technician B says a degraded HV battery could cause this. Who is right? A) Technician A B) Technician B C) Both A and B D) Neither A nor B
A (on a type 2 HEV if the crank signal is not present the vehicle will not crank. Even if the HV battery is degraded/discharged the 12V starter should start the ICE)
Because the Atkinson cycle uses a normal intake stroke, but as the compression stroke is about to start, the intake valve is left ___ not ____, to reduce pumping losses. A. Close not open B. Open not close C. Down not up D. Up not down
B
Honda insight HEV type 2 HEV indexed spark plugs are letter A, B, C, and D those have to be gapped? A. True B. False
B
On a Type-3 PHEV, the high-voltage battery pack falls to a predetermined state-of-charge (SOC), but the internal combustion engine (ICE) fails to start and it is in the READY TO DRIVE (KOER) mode. Which of the following is the most likely cause? • a. Depleted high voltage battery • b. Seized MG1 • c. Failed crankshaft position sensor d. Failed MG
B
On a type 1 HEV vehicle, can the resolver be adjusted and relearn? A. Yes B. No
B
On a type 1 HV battery removal, it's usually removed from? A. Front of vehicle B. Rear of vehicle C. Under vehicle D. None of the above
B
Technician A says that in order to allow idle stop to take place when the A/C system is on, compressor drives on some HEVs are modified to include an electric motor that is powered by the 12-volt auxiliary battery. Technician B says that some Type-1 HEVs use a high-voltage electric motor built in to allow A/C system operation during idle stop. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
B
The High-Voltage is being disconnected from a Honda Type-2 HEV. You removed the battery module switch lid from the Intelligent Power Unit cover and tuned OFF the battery module switch. What is being done at points X in the above illustration before proceeding with any service? a. Checking for not more than 50 VDC b. Checking for not more than 30 VDC c. Install the IPU cover d. Turn the battery module switch ON.
B
The inverter water pump is being replaced on a Type-1 HEV. Technician A says that you place shop towels around the connectors of the wire harness and inverter water pump assembly. Technician B says that you put pieces of cloth into the pipes and disconnected hoses or cover the pipes and hoses with plastic bags to prevent foreign matter from entering the inverter cooling system. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
B
Which of the following is correct about engine compartment molded connector repair? a. If damaged, it must be cut off and replaced. b. If damaged, it must be separated before making any repairs. c. If damaged, the complete harness should be replaced. d. If the connector is not damaged, you still must replace it.
B
Which of the following methods is used to enter the inspection mode on a Type-1 HEV? • a. Select inspection mode on any scan tool. b. Select inspection mode on a factory-level scan tool. c. Press the POWER button and Brake simultaneously. d. Place the gear selector in PARK and apply the brake.
B
When the manual safety disconnect switch is open, the hybrid controller does all of the following to keep the vehicle safe, EXCEPT: a. With the engine running, it will detect a fault and set a diagnostic trouble code. b. With the engine running, it will close the power relays, turning off the "ready" light. c. With the vehicle moving, it will allow it to continue until a stop, then it will disable the ICE. d. With the vehicle not moving, it will disable the ICE immediately.
B ( B is correct and the exception because if the engine is running, it will detect a fault and set a diagnostic trouble code and OPEN, not CLOSE, the power relays, turning off the "ready" light.)
A Type-3 PHEV sets DTC P0AA6 Hybrid/EV Battery Voltage System Isolation Lost. All of the following could be the cause, except: a. Open charger fuse b. Single high voltage contactor stuck open can set this DTC c. Condensation or water intrusion into the hybrid/EV battery pack d. Low or no coolant in the hybrid/EV battery cooling system
B (B is the exception because a high voltage contactor stuck CLOSE not OPEN can set this DTC. The isolation check for P0AA6 Hybrid Battery Voltage System Isolation Lost runs when all the contactors (main positive, main negative contactor, multi-purpose contactor, charger positive contactor and charger negative contactor) are open.)
Two technicians are discussing vacuum and compression test readings from am Atkinson cycle engine. Technician A says the compression reading will read higher than a conventional engine. Technician B says the vacuum readings will read lower than a conventional engine. Who is right? A) Technician A B) Technician B C) Both A and B D) Neither A nor B
B (Compression test and vacuum reading are lower than OTTO cycle (conventional, naturally aspirated) ICEs because of the vvt to hold the intake valve open)
A Type-1 HEV Electric Vehicle Converter is being replaced. There are necessary procedures that must be performed after parts are removed and installed, or replaced during HV converter kit removal/installation. Which of the following is required? a. Initialize back door lock b. Resolver learning c. Perform Vehicle Identification Number (VIN) registration d. Memorize steering angle neutral point
B (If resolver learning is not done, the following will occur: DTCs are stored, slight vibration at a vehicle speed of 5 km/h (3 mph) or less, and shock or vibration during acceleration.)
Two technicians are explaining the operation of a Type-1 or Type-2 HEV parking pawl. Technician A says the parking pawl relies on the High Voltage battery pack to operate. Technician B says that the parking paw position can be monitored with a scan tool. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
B (If this 12-volt battery is dead, the parking pawl electric shift motor will not work.)
12. Most HEVs and PHEVs use an ICE with an: A) Otto cycle B) Atkinson cycle C) Miller cycle D) Faulkner cycle
B (Less frictional losses and higher efficiency than other ICE)
A technician is doing a static compression test on a Honda Type-2 HEV. Which of the following is part of that procedure? a. Turning on the IMA (Integrated Motor Assist) switch. • b. Removing the 20-amp IMA fuse. • c. Removing one spark plug at a time. • d. Removing the throttle body.
B (Removing the 20-amp IMA fuse shuts down the HV battery system and allows the 12-volt auxiliary battery to operate the starter motor. *A is incorrect because you turn OFF the IMA switch not ON.*
One of 3 high-voltage battery sections inside the battery pack were just replaced on a Type-3 plugged in hybrid electric vehicle. Technician A says that the high-voltage battery section will be self-balanced by driving the vehicle. Technician B says that this battery section voltage can be balanced using a high-voltage battery charger with a powering and balancing tool. Who is right? • a. A only • b. B only • c. Both A and B • d. Neither A nor B
B (Tech A is incorrect because the powering and self-balancing tool is only possible on much smaller lithium-lon battery sections.)
Two technicians are describing diagnosis procedures for hybrid electric vehicles. Technician A says that when you are checking for DTCs (diagnostic trouble code) you will need a standard scan tool to gain access to codes and sub codes. Technician B says to follow service information specified steps and procedures to include checking the scan tool data for sensors or values that are not within normal range. Who is right? • a. A only • b. B only • c. Both A and B • d. Neither A nor B
B (Tech A is incorrect because when checking for DTCs, you will need an OEM, enhanced, or factory level scan tool to get access to codes and sub codes.)
Two technicians are describing CRANK and RUN mode on an HEV. Tech A says when the ICE (Internal Combustion Engine) is cooled down, turning the key on a 2001-2003 Prius to the crank position will cause the ICE to start before the READY light turns on. Tech B says that when the ICE is fully warmed up, the READY light will illuminate and the ICE will not start. When the READY light is ON, the vehicle is ready to drive, whether the ICE is running or not. Who is right? A. Tech A B. Tech B
B (Tech A is wrong because it'll start after ready not before)
Technician A says that a DC-to-DC converter is used to convert 12 volts from the auxiliary battery to a higher voltage to run the electric motor(s) in a hybrid electric vehicle. Technician B says that a DC-to-DC converter is used to convert the voltage from the motor/generator to a higher voltage to charge the high-voltage batteries. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
B (Tech B is correct because DC-to-DC converters (usually written DC-DC converter) are electronic devices used to transform DC voltage from one level of DC voltage to another higher or lower level. They are used to distribute various levels of DC voltage throughout a vehicle from a single power bus)
A Type-2 HEV with a CVT (Continuously Variable Transmission) Start Clutch like the one in the above photo is being diagnosed. This Type-2 HEV sets DTC P0971 CVT Start Clutch Pressure Control Valve Circuit High Voltage. Technician A says that the CVT was recently overhauled and the Start Clutch was not calibrated. Technician B says that the cause could a faulty CVT drive pulley pressure control solenoid valve. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B
B (Tech B is correct because the start clutch control system controls the clutch piston hydraulic pressure which affects the amount of power transmission by the direct start clutch on the driven pulley shaft. The TCM activates the CVT start clutch pressure control solenoid to control the hydraulic pressure that is applied to the start clutch piston. The start clutch control system detects the slip of the clutch.)
