ASE L4 DOMAIN 3: RADAR-Based Systems Service and Diagnosis Welcome to your ASE L4 DOMAIN 3: RADAR-Based Systems Service and Diagnosis 1. ASE L4: RADAR-Based Systems Service and Diagnosis A technician is diagnosing a fault in a radar-based blind-spot detection system. The system fails to alert when a vehicle is present in the blind spot. Which of the following is LEAST likely to be the cause? A. Faulty radar sensor B. Paint overspray on the bumper cover where the radar sensor is located C. The use of non-OEM wheels on the vehicle D. A damaged rear bumper None 2. ASE L4: RADAR-Based Systems Service and Diagnosis During a radar sensor calibration, a technician finds that the radar unit cannot be calibrated successfully. What is the MOST likely reason? A. The calibration area has a slight incline. B. The vehicle's battery is at 75% charge. C. There is a new, aftermarket front grille installed. D. The tire pressure is 5 psi below the recommendation. None 3. ASE L4: RADAR-Based Systems Service and Diagnosis What is a common requirement for the proper operation of a radar-based forward collision warning system? A. The vehicle must have a full tank of fuel. B. There must be a clear line of sight for the radar sensor. C. The vehicle's tires must be rotated before system activation. D. The exterior lights must be on, even in daylight conditions. None 4. ASE L4: RADAR-Based Systems Service and Diagnosis A customer complains that the radar-based collision mitigation system activates intermittently for no apparent reason. What should the technician inspect FIRST? A. Alignment of the steering system B. Firmware version of the vehicle's ECU C. Condition and positioning of the radar sensor D. The brake system's response times None 5. ASE L4: RADAR-Based Systems Service and Diagnosis When diagnosing a radar-based system, which of the following diagnostic tools is essential for confirming the radar wave pattern and strength? A. A multimeter B. A radar sensor tester C. An oscilloscope D. A scan tool with live data capability None 6. ASE L4: RADAR-Based Systems Service and Diagnosis What is a potential consequence of performing radar sensor calibration with incorrect vehicle loading? A. Improved fuel efficiency due to altered aerodynamics B. Increased tire wear on the front axle C. Misalignment of the radar sensor's detection zone D. Enhanced braking performance None 7. ASE L4: RADAR-Based Systems Service and Diagnosis A technician observes that a radar-based adaptive cruise control system is unable to maintain the set speed or follow distance. What is the LEAST likely cause of this issue? A. Radar sensor misalignment B. Malfunctioning vehicle speed sensor C. Defective throttle actuator D. Upgraded LED headlights installed by the owner None 8. ASE L4: RADAR-Based Systems Service and Diagnosis In a radar-based lane keep assist system, what could cause the system to inaccurately detect lane markings and lead to unnecessary corrective steering actions? A. Incorrectly adjusted rear-view mirror B. Misaligned radar sensor after a minor collision C. Low windshield washer fluid levels D. Activation of the hazard lights None 9. ASE L4: RADAR-Based Systems Service and Diagnosis When troubleshooting a radar-based automatic emergency braking AEB system that fails to engage when expected, what diagnostic step should be prioritized? A. Inspecting the condition of the brake pads B. Checking for obstructions in front of the radar sensor C. Verifying the alignment of the headlights D. Testing the anti-lock braking system (ABS) operation None 10. ASE L4: RADAR-Based Systems Service and Diagnosis Which of the following procedures is critical after replacing a radar sensor on a vehicle? A. Recharging the air conditioning system B. Calibration of the radar sensor C. Replacement of the vehicle's battery D. Alignment of the wheels None 11. ASE L4: RADAR-Based Systems Service and Diagnosis A radar-based cross-traffic alert system intermittently fails to warn of approaching vehicles. What should a technician inspect first? A. The transmission fluid level B. The firmware of the vehicle's body control module C. The radar sensor's mounting and wiring D. The condition of the tail lights None 12. ASE L4: RADAR-Based Systems Service and Diagnosis When a technician is aligning a radar sensor for a lane departure warning system, which environmental condition could most significantly affect the accuracy of the calibration? A. High humidity B. Ambient noise C. Intense sunlight D. Wind speed None 13. ASE L4: RADAR-Based Systems Service and Diagnosis If a vehicle equipped with a radar-based adaptive cruise control ACC system has been lifted for wheel service, what step must be taken before the ACC system can be expected to operate accurately? A. The vehicle must be driven for at least 10 miles at highway speeds. B. The radar sensor must undergo a self-test routine. C. A dynamic calibration of the radar sensor must be performed. D. The vehicle must be allowed to rest on its suspension for a minimum of 30 minutes. None 14. ASE L4: RADAR-Based Systems Service and Diagnosis During a test drive of a vehicle with a radar-based collision avoidance system, the system fails to provide a warning when approaching a stationary object at low speed. Which of the following is the MOST likely cause? A. The brake fluid is at minimum level. B. The system is designed to not warn at low speeds. C. There is a high level of road surface reflection. D. The radar sensor is partially covered by a bumper sticker. None 15. ASE L4: RADAR-Based Systems Service and Diagnosis What is the typical purpose of a "notch filter" used in conjunction with radar systems in vehicles? A. To increase the frequency of the radar signal B. To reduce interference from other vehicle systems C. To amplify the return signal for better detection D. To enhance the radar signal's penetration in bad weather None 16. ASE L4: RADAR-Based Systems Service and Diagnosis A customer reports that their radar-based parking assistance system beeps continuously when no obstacles are present. What could be the MOST probable cause? A. The parking brake is engaged. B. The vehicle's rear is heavily loaded. C. There's accumulated snow around the radar sensor. D. The audio system volume is set too high. None 17. ASE L4: RADAR-Based Systems Service and Diagnosis What is the correct procedure after installing a new radar sensor for a blind-spot monitoring system? A. Perform an all-wheel alignment. B. Engage and disengage the parking brake three times. C. Clear any stored trouble codes from the system. D. Conduct a stationary calibration of the new sensor. None 18. ASE L4: RADAR-Based Systems Service and Diagnosis When performing a dynamic calibration on a radar-based adaptive cruise control system, which of the following is essential? A. A full tank of gas to ensure proper weight distribution. B. The vehicle must be loaded to maximum capacity. C. A clear day with no precipitation. D. The use of a manufacturer-specified drive route. None 19. ASE L4: RADAR-Based Systems Service and Diagnosis In a radar-based system, what could cause sporadic malfunctions that occur only during heavy rain? A. Reduced tire tread depth affecting vehicle stability B. Moisture infiltration in the radar sensor housing C. The windshield wipers are set to a high speed. D. The radar's waveguide is contaminated with road salt. None 20. ASE L4: RADAR-Based Systems Service and Diagnosis If a technician is unable to perform a radar sensor calibration due to persistent errors during the process, what should be checked FIRST? A. The vehicle's tire pressure B. The electrical system's grounding points C. The sensor's power supply voltage D. The alignment of the vehicle's suspension None 21. ASE L4: RADAR-Based Systems Service and Diagnosis What diagnostic tool is primarily used to confirm that a radar unit is transmitting and receiving correctly after installation? A. A multimeter B. A radar test box C. An oscilloscope D. A scan tool None 22. ASE L4: RADAR-Based Systems Service and Diagnosis When diagnosing a radar-based adaptive cruise control system, which condition could cause the system to reduce vehicle speed unnecessarily? A. Heavy traffic in adjacent lanes B. Low ambient temperature C. A misaligned front wheel D. High humidity conditions None 23. ASE L4: RADAR-Based Systems Service and Diagnosis If a vehicle's radar-based blind-spot detection system is not functioning and no Diagnostic Trouble Codes (DTCs) are present, what should be checked next? A. The interior rearview mirror adjustment B. The cleanliness of the radar sensor surface C. The air pressure in the spare tire D. The fuse for the infotainment system None 24. ASE L4: RADAR-Based Systems Service and Diagnosis What could cause a radar-based system to fail only during long-distance drives? A. Overheating of the radar sensor B. The automatic transmission fluid reaching high temperatures C. Activation of the vehicle's fuel-saving mode D. Gradual decrease in engine oil level None 25. ASE L4: RADAR-Based Systems Service and Diagnosis During a radar calibration process, the presence of which item could lead to inaccurate calibration? A. A metallic object within the calibration area B. A rubber cone placed at the edge of the workshop C. An electronic diagnostic tool placed on the vehicle roof D. A cloth seat cover on the driver's seat None 26. ASE L4: RADAR-Based Systems Service and Diagnosis A technician finds that a radar-based system's performance deteriorates as the vehicle speeds up. This could indicate a problem with which component? A. The transmission shift solenoids B. The vehicle speed sensor C. The radar sensor's frequency modulator D. The wheel alignment None 27. ASE L4: RADAR-Based Systems Service and Diagnosis When the radar-based automatic emergency braking system is activated, the braking force applied is less than expected. What should be investigated first? A. The condition of the brake pads and rotors B. The radar sensor's alignment C. The brake fluid level and quality D. The function of the Anti-lock Braking System (ABS) None 28. ASE L4: RADAR-Based Systems Service and Diagnosis A vehicle's radar-based system is unable to detect vehicles on downhill slopes. The MOST likely cause of this issue is: A. Faulty wheel speed sensors. B. Incorrect toe setting of the rear wheels. C. Malfunctioning incline sensor within the system. D. Inadequate tire pressure in the front tires. None 29. ASE L4: RADAR-Based Systems Service and Diagnosis A technician notices that the radar-based cross-traffic alert system is only functional when the vehicle is in reverse gear. This operation is: A. Correct, as the system is designed to function only in reverse gear. B. Incorrect, as it should also function when the vehicle is in drive gear. C. Incorrect, as it should function in any gear, including neutral. D. Incorrect, unless the system is manually disabled in the vehicle settings. None 30. ASE L4: RADAR-Based Systems Service and Diagnosis After repairing a radar sensor housing damaged by minor impact, the adaptive cruise control system intermittently disengages. What is the NEXT step a technician should take? A. Check the radar sensor alignment. B. Inspect the adaptive cruise control switches on the steering wheel. C. Perform a road test to check for system engagement at various speeds. D. Replace the radar sensor as a precautionary measure. None 1 out of 30 Time is Up! Time's up
