E
.
Learndmv
DMV PRACTICE
Toggle navigation
Find your state
Exam types
Practice tests
Sign in
Create account
↗
← Leave quiz
ASE L4 ADAS Specialist Practice Questions - ASE L4 - Advanced Driver Assistance Systems (ADAS) Specialist Certification Exam
Practice mode
Question
1
of 25
QUESTION 1 / 25
During the ASE L4 test, technicians are given an electronic reference describing a generic vehicle's ADAS architecture. What is this reference called?
Choose one answer below.
A
The OEM service portal
✓
B
The J2534 pass-through manual
✓
C
The ADAS Composite Vehicle
✓
D
The ASE Wiring Atlas
✓
QUESTION 2 / 25
A forward-facing camera mounted at the top of the windshield is replaced after a windshield replacement. What is the most important next step before returning the vehicle?
Choose one answer below.
A
Clear codes and road test only
✓
B
Perform the OEM-specified camera calibration
✓
C
Replace the wiper blades
✓
D
Reset the tire pressure monitoring system
✓
QUESTION 3 / 25
Which sensing technology is most commonly used for adaptive cruise control to measure the distance and closing speed of a vehicle ahead at highway range?
Choose one answer below.
A
Ultrasonic sensors
✓
B
Long-range RADAR
✓
C
Rain/light sensor
✓
D
Wheel speed sensors
✓
QUESTION 4 / 25
A static (stationary) ADAS calibration generally requires which of the following?
Choose one answer below.
A
Driving the vehicle above 25 mph on a marked highway
✓
B
Only a generic OBD-II code reader
✓
C
A specific target/pattern positioned at a measured distance and height in a controlled space
✓
D
Removing the front bumper cover
✓
QUESTION 5 / 25
Why does vehicle ride height directly affect ADAS calibration accuracy?
Choose one answer below.
A
It has no effect because sensors self-level
✓
B
It changes the height and aim angle of camera and RADAR sensors relative to the road and targets
✓
C
It only matters for the audio system
✓
D
It changes only the tire pressure readings
✓
QUESTION 6 / 25
Tech A says a four-wheel alignment can affect a forward camera's lane-centering performance because thrust angle changes the vehicle's straight-ahead reference. Tech B says alignment never matters to ADAS. Who is correct?
Choose one answer below.
A
Tech B only
✓
B
Both A and B
✓
C
Tech A only
✓
D
Neither A nor B
✓
QUESTION 7 / 25
Blind spot monitoring systems most commonly detect vehicles in adjacent lanes using sensors located where?
Choose one answer below.
A
In the front grille only
✓
B
In the rear corners/quarter panels, typically short/mid-range RADAR
✓
C
Inside the cabin headliner
✓
D
On top of the windshield
✓
QUESTION 8 / 25
Ultrasonic park assist sensors determine the distance to an object primarily by measuring what?
Choose one answer below.
A
The Doppler frequency shift of reflected light
✓
B
The time of flight of an emitted sound pulse and its echo
✓
C
The electrical resistance of the bumper
✓
D
The GPS coordinates of the object
✓
QUESTION 9 / 25
A vehicle exhibits a 'forward camera not calibrated' message after a windshield replacement. The shop has no OEM target. What is the correct action?
Choose one answer below.
A
Clear the code and deliver the vehicle
✓
B
Tell the customer it will fix itself by driving
✓
C
Use the OEM-specified static and/or dynamic calibration procedure and equipment before release
✓
D
Disconnect the camera to stop the message
✓
QUESTION 10 / 25
Which statement best describes sensor fusion in an ADAS-equipped vehicle?
Choose one answer below.
A
Welding two sensors into one housing
✓
B
Using only one sensor to reduce wiring
✓
C
Combining data from multiple sensors (e.g., camera + RADAR) to make more reliable decisions
✓
D
Fusing the fuse box with the ECU
✓
QUESTION 11 / 25
Before performing a static forward-camera calibration, which environmental condition is typically required by OEM procedures?
Choose one answer below.
A
A sloped, dimly lit gravel lot
✓
B
A level floor, adequate even lighting, and clear space free of reflective objects
✓
C
Bright direct sunlight aimed at the camera
✓
D
An area with other vehicles within one meter of the target
✓
QUESTION 12 / 25
A dynamic ADAS calibration typically requires the technician to do what?
Choose one answer below.
A
Place a target board at 1.5 m and stay parked
✓
B
Spin the wheels on a lift to a set RPM
✓
C
Drive the vehicle at specified speeds on suitable roads while the scan tool runs the routine
✓
D
Run the engine at idle for 30 minutes only
✓
QUESTION 13 / 25
An automatic emergency braking (AEB) system applies the brakes unexpectedly on clear, open roads. Which is the most likely root cause to investigate first?
Choose one answer below.
A
Worn brake pads
✓
B
Misaligned or blocked forward RADAR/camera reading false objects
✓
C
A weak 12 V battery only
✓
D
Low tire tread depth
✓
QUESTION 14 / 25
Tech A says a forward RADAR sensor can usually be aimed using a manufacturer-specified fixture or reflector and the scan tool's alignment routine. Tech B says RADAR never needs aiming once installed. Who is correct?
Choose one answer below.
A
Tech B only
✓
B
Both A and B
✓
C
Tech A only
✓
D
Neither A nor B
✓
QUESTION 15 / 25
Most ADAS modules communicate sensor and control data over which in-vehicle network?
Choose one answer below.
A
Household Ethernet only
✓
B
A CAN bus (often with high-speed and ADAS-specific segments)
✓
C
A standard USB hub
✓
D
Analog telephone lines
✓
QUESTION 16 / 25
A lane departure warning (LDW) system fails to alert on a road with faded lane markings. The camera calibrates normally and has no faults. What is the most accurate conclusion?
Choose one answer below.
A
The camera module must be replaced
✓
B
Poor or absent lane markings can prevent LDW from detecting lane edges; system performance is conditionally limited
✓
C
The CAN bus is shorted
✓
D
The brake system is faulty
✓
QUESTION 17 / 25
After a front-end collision repair, which ADAS-related checks should be completed before delivery?
Choose one answer below.
A
Only a visual inspection of paint
✓
B
Verify sensor mounting/brackets, perform required RADAR/camera calibrations, and confirm system operation
✓
C
Reset the radio presets
✓
D
Inflate the spare tire
✓
QUESTION 18 / 25
A J2534 pass-through device is primarily used in ADAS service for what purpose?
Choose one answer below.
A
Mechanically aiming RADAR sensors
✓
B
Reprogramming/flashing control modules and accessing OEM diagnostic software
✓
C
Measuring tire pressure
✓
D
Charging the hybrid battery
✓
QUESTION 19 / 25
Rear cross-traffic alert (RCTA) is designed to warn the driver of what?
Choose one answer below.
A
Low engine oil pressure
✓
B
Tire wear on the front axle
✓
C
Vehicles approaching from the sides while backing out of a parking space
✓
D
An open trunk lid
✓
QUESTION 20 / 25
Why must the vehicle's centerline (geometric/thrust line) be established correctly when placing static calibration targets?
Choose one answer below.
A
Centerline is irrelevant to calibration
✓
B
Only to make the bay look organized
✓
C
So targets are positioned symmetrically relative to how the sensor 'sees' straight ahead
✓
D
To set engine timing
✓
QUESTION 21 / 25
A customer reports adaptive cruise control 'cuts out' intermittently. The forward RADAR fascia area was recently repainted thickly with a metallic-flake paint. What should the technician suspect?
Choose one answer below.
A
The wiper motor is failing
✓
B
The cabin air filter is clogged
✓
C
The paint thickness/metal content is attenuating or distorting the RADAR signal
✓
D
The headlight bulbs are the wrong color
✓
QUESTION 22 / 25
Which is a correct general statement about camera-based ADAS centering during static calibration?
Choose one answer below.
A
The camera is always centered automatically by gravity
✓
B
Centering only matters for RADAR
✓
C
The camera target/pattern must be centered to the vehicle's reference, not just to the camera housing
✓
D
Camera centering is set by tire pressure
✓
QUESTION 23 / 25
An ultrasonic parking sensor reports a constant close-distance warning even with nothing behind the vehicle. Which is the most likely cause?
Choose one answer below.
A
The transmission is in the wrong gear oil
✓
B
The alternator is overcharging
✓
C
A cracked, mud-caked, or ice-covered sensor face, or a faulty sensor
✓
D
The lane-keep camera is dirty
✓
QUESTION 24 / 25
After replacing a forward RADAR sensor, the scan tool requires a 'horizontal alignment' or 'vertical alignment' procedure. What does this accomplish?
Choose one answer below.
A
It updates the radio firmware
✓
B
It establishes the RADAR boresight angle relative to the vehicle so detections map correctly
✓
C
It sets the clock
✓
D
It bleeds the brakes
✓
QUESTION 25 / 25
Which scenario most clearly requires an ADAS forward-camera calibration even though the camera itself was not replaced?
Choose one answer below.
A
Replacing the engine air filter
✓
B
Windshield replacement on a vehicle whose camera views through the glass
✓
C
Rotating the tires
✓
D
Replacing a tail light bulb
✓
← Previous
0 of 25 answered
Next question →
Finish & see results →