ASE L3 Domain 4: Power Electronics Welcome to your ASE L3 Domain 4: Power Electronics 1. ASE L3: Power Electronics A hybrid vehicle exhibits a DTC related to the power electronics cooling system. Which of the following components, if faulty, would MOST likely cause this DTC? A. The coolant flow control valve B. The electric air conditioning compressor C. The DC/DC converter D. The electric power steering pump None 2. ASE L3: Power Electronics Which of the following conditions would MOST likely cause an inverter to shut down in a hybrid electric vehicle? A. High coolant temperature in the inverter's cooling circuit. B. Low air pressure in the tires. C. A weak 12-volt auxiliary battery. D. An overcharged high voltage battery. None 3. ASE L3: Power Electronics When testing a high-voltage inverter, a technician finds that it is not providing the correct voltage to the electric motor. What could be the cause of this issue? A. Faulty IGBT (Insulated Gate Bipolar Transistor) modules. B. A defective high voltage battery cell. C. Incorrect tire size affecting vehicle speed sensors. D. A blown fuse in the 12-volt auxiliary power system. None 4. ASE L3: Power Electronics In a hybrid vehicle's power electronic system, what component's failure would MOST directly affect the conversion of DC to AC power? A. The battery management system. B. The AC compressor inverter. C. The main inverter module. D. The high voltage interlock loop. None 5. ASE L3: Power Electronics A technician is diagnosing a problem where the regenerative braking system is not functioning as expected. Which component should be inspected FIRST? A. The ABS modulator. B. The brake pedal position sensor. C. The DC/DC converter. D. The power electronics module. None 6. ASE L3: Power Electronics What could cause an unexpected voltage drop in the high voltage output of a power electronics module? A. An open circuit in the module's cooling pump. B. Corrosion at the high voltage battery terminals. C. A damaged voltage sensor within the module. D. Excessive wear of the electric motor brushes. None 7. ASE L3: Power Electronics What condition could lead to an insulated-gate bipolar transistor (IGBT) failure in a hybrid vehicle's inverter assembly? A. Overvoltage conditions. B. A minor refrigerant leak in the air conditioning system. C. An under-torqued wheel lug nut. D. A defective 12-volt starter battery. None 8. ASE L3: Power Electronics A technician is troubleshooting a hybrid vehicle where the electric motor operates sporadically. Which of the following is the MOST likely cause of this problem? A. A faulty high voltage contactor. B. A degraded hybrid vehicle auxiliary battery. C. A malfunctioning inverter coolant pump. D. A defective electric power steering module. None 9. ASE L3: Power Electronics Which of the following diagnostic procedures is essential when diagnosing a fault in the DC/DC converter of a hybrid vehicle? A. Measuring the output of the 12-volt alternator. B. Checking the state of charge of the high voltage battery. C. Checking the ripple voltage at the DC/DC converter output. D. Inspecting the integrity of the high voltage interlock loop. None 10. ASE L3: Power Electronics During the inspection of a hybrid vehicle, a technician notices that the power electronics module (PEM) is overheating. What is the MOST likely cause? A. A failure in the PEM's internal fan. B. A low state of charge in the high voltage battery. C. A restriction in the exhaust system. D. A faulty electric air conditioning compressor. None 11. ASE L3: Power Electronics A high voltage (HV) battery's state of charge is lower than expected after a test drive. The technician should FIRST check for issues in which of the following components? A. The high voltage battery itself. B. The onboard charging system. C. The power electronics module. D. The auxiliary 12-volt battery. None 12. ASE L3: Power Electronics What component failure in the power electronics system of a hybrid vehicle is MOST likely to result in reduced acceleration and power delivery to the wheels? A. An inefficient catalytic converter. B. A malfunctioning electric air conditioning compressor. C. A faulty power electronics module (PEM). D. A damaged high voltage battery enclosure. None 13. ASE L3: Power Electronics When diagnosing a fault in the regenerative braking system of a hybrid vehicle, which component should a technician inspect if the regenerative braking is weaker than expected, but no DTCs are present? A. The friction brake master cylinder. B. The regenerative braking control module. C. The wheel speed sensors. D. The hybrid battery state of health (SOH). None 14. ASE L3: Power Electronics What is a common reason for a power inverter module (PIM) to mismanage power distribution in a hybrid vehicle? A. A faulty vehicle speed sensor. B. Degraded insulation in the high-voltage cables. C. Corroded terminals in the 12V electrical system. D. Firmware that requires an update. None 15. ASE L3: Power Electronics A technician observes that a hybrid electric vehicle's power electronics module is generating excessive heat during operation. Which of the following is the LEAST likely to be the cause? A. A malfunctioning cooling fan or pump for the power electronics module. B. A restriction in the cooling system's heat exchanger. C. High resistance in the high-voltage circuitry. D. An underinflated tire. None 1 out of 15 Time is Up! Time's up
