ASE L3 Domain 1: Battery System Welcome to your ASE L3 Domain 1: Battery System 1. ASE L3: Battery System A technician finds that a NiMH hybrid vehicle battery pack has decreased performance and poor charge acceptance. Which of the following is LEAST likely to cause this condition? A. Increased internal resistance due to cell aging B. Corroded bus bars connecting the cells C. Memory effect from frequent shallow discharge cycles D. Contamination within the electrolyte None 2. ASE L3: Battery System A technician is diagnosing an HEV that has reduced electric driving range. After confirming the high voltage battery pack is fully charged, which of the following would be the BEST next diagnostic step? A. Load test the individual cells of the battery pack B. Check for software updates for the battery management system C. Measure the pack's state-of-charge (SoC) using a scan tool D. Inspect the chassis grounding system None 3. ASE L3: Battery System A hybrid vehicle is brought in with a complaint of reduced acceleration power. The BMS indicates a healthy state-of-charge, but power output is limited. Which component is MOST likely to cause this issue? A. Battery current sensor B. Hybrid power inverter module C. High-voltage interlock loop D. Battery cell fuse None 4. ASE L3: Battery System After a high-voltage battery repair, the technician notes that the battery cooling fan runs more frequently than before. What could be the cause? A. The fan's thermal sensor is not calibrated B. Air is trapped in the cooling system C. The battery cover is not sealed properly D. Replacement cells have higher internal resistance None 5. ASE L3: Battery System When diagnosing a battery electric vehicle (BEV) that experiences reduced drive power intermittently, what data parameter would be MOST useful for a technician? A. High-voltage contactor operation B. Cell balancing status C. Battery state-of-health (SoH) D. Ambient temperature sensor readings None 6. ASE L3: Battery System In a hybrid vehicle, what would be an indicator of a deteriorating high-voltage battery aside from reduced capacity? A. Lower than normal operating temperature B. Reduced braking regeneration effectiveness C. Faster than normal charging times D. Higher pitch noise from the cooling fan None 7. ASE L3: Battery System A technician is troubleshooting a high voltage battery issue where the battery does not seem to hold charge for the expected duration. Besides checking for parasitic drains, what other electrical measurements should be taken? A. Open circuit voltage (OCV) of individual cells B. Load test on the 12-volt auxiliary battery C. High voltage cable continuity and resistance D. Inverter input and output voltage comparison None 8. ASE L3: Battery System A technician observes that a hybrid vehicle's high-voltage battery discharges more quickly than usual. The vehicle has not shown any error codes, and the driving conditions have remained consistent. Which of the following could be the most likely cause? A. Increased internal resistance due to cell oxidation B. Reduced ambient temperatures affecting battery chemistry C. An increase in the vehicle's aerodynamic drag D. A malfunctioning electric air conditioning compressor None 9. ASE L3: Battery System While analyzing the battery condition of a fully electric vehicle, a technician notices that the state-of-charge SoC fluctuates irregularly under steady-state conditions. What is the most probable reason for this occurrence? A. Inconsistent SoC calibration B. Voltage leaks in the high voltage system C. A defective SoC metering system D. Irregular cell balancing activity None 10. ASE L3: Battery System During a service inspection on a hybrid vehicle, a technician discovers that the voltage difference between the highest and lowest cell voltages exceeds the manufacturer's specified limit. What does this indicate? A. An imbalance that requires cell balancing procedures B. A normal condition during high-load operations C. An impending failure of the high-voltage interconnects D. The battery cooling system is operating beyond its capacity None 1 out of 10 Time is Up! Time's up
