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ASE A4 Suspension and Steering practice questions

210 free questions with answers and explanations.

Practice test
  1. 101.When performing a four-wheel alignment on a vehicle, a technician discovers that the rear camber is out of specification on one side, but the vehicle's rear suspension is non-adjustable. Which of the following is the MOST appropriate action?Wheel Alignment Diagnosis, Adjustment, and Repair
  2. 102.A vehicle with an electronic power steering (EPS) system develops an intermittent loss of power assist, often accompanied by the EPS warning light illuminating briefly. The issue seems to resolve itself after cycling the ignition or driving for a short period. All wiring and connections appear visually sound. Which of the following is the MOST likely cause?Steering System Diagnosis and Repair
  3. 103.A vehicle exhibits a noticeable vibration felt through the steering wheel that is present at all speeds, but becomes more pronounced during braking. The technician suspects an issue with the braking system. Which of the following braking components is MOST likely causing this steering wheel vibration?Steering System Diagnosis and Repair
  4. 104.A technician is performing a four-wheel alignment on a vehicle equipped with an independent rear suspension. The alignment machine indicates a positive thrust angle of +0.3 degrees. The specification is 0.0 degrees +/- 0.1 degrees. Which of the following is the MOST appropriate adjustment to correct this condition?Wheel Alignment Diagnosis, Adjustment, and Repair
  5. 105.A technician is performing an alignment on a vehicle and observes that the front left steering axis inclination (SAI) is 12.0 degrees, and the front right SAI is 12.5 degrees. The manufacturer's specification for SAI is 11.5 degrees ±0.5 degrees. The included angle for the front left is 11.0 degrees and for the front right is 11.5 degrees. (All camber values are within specification). Which of the following is the MOST likely cause of the SAI discrepancy?Wheel Alignment Diagnosis, Adjustment, and Repair
  6. 106.A customer reports a persistent, light rattling noise emanating from the steering column area, particularly noticeable over small bumps or rough roads. The noise is not affected by turning the steering wheel or engine RPM. What is the MOST likely cause?Steering System Diagnosis and Repair
  7. 107.A client complains that their vehicle pulls to the right, even after a recent alignment. The technician performs a road test and confirms the pull. The alignment machine shows all angles within specification. What is the MOST likely non-alignment related cause for this vehicle pull?Wheel Alignment Diagnosis, Adjustment, and Repair
  8. 108.A technician is performing a four-wheel alignment on a vehicle. After setting the front toe, the technician observes that the steering wheel is off-center to the left. What is the most likely cause?Wheel Alignment Diagnosis, Adjustment, and Repair
  9. 109.A technician is performing a four-wheel alignment on a vehicle that exhibits a pull to the right. After inspecting all suspension components and confirming they are in good condition, the technician measures the alignment angles. The front left camber is +0.5 degrees, front right camber is -0.5 degrees, and the manufacturer's specification for camber is 0.0 degrees ±0.5 degrees. Which of the following is the MOST likely cause of the right pull?Wheel Alignment Diagnosis, Adjustment, and Repair
  10. 110.A customer reports that their vehicle's steering wheel requires constant small corrections to maintain a straight path on the highway, a condition known as 'wander.' The technician performs a thorough inspection and notes that the steering gear mounting bushings are severely deteriorated, allowing the entire steering gear to shift slightly. How would this condition manifest in driving dynamics?Steering System Diagnosis and Repair
  11. 111.A technician is performing a four-wheel alignment on a vehicle with a solid rear axle. The alignment machine shows the rear total toe is -0.15 degrees and the rear thrust angle is -0.2 degrees. The specification for both is 0.0 +/- 0.1 degrees. What is the MOST appropriate next step?Wheel Alignment Diagnosis, Adjustment, and Repair
  12. 112.A vehicle exhibits a consistent pull to the right. After inspecting tire pressures and performing a thorough suspension component check, a technician performs an alignment. The alignment machine shows the following caster readings: Left Front +3.5 degrees, Right Front +2.0 degrees. The specification for caster is +2.5 degrees +/- 0.5 degrees. Which of the following is the most likely cause of the vehicle's pull?Wheel Alignment Diagnosis, Adjustment, and Repair
  13. 113.A technician is performing a four-wheel alignment on a vehicle with a MacPherson strut suspension. The alignment machine shows a front left Steering Axis Inclination (SAI) of 10.5 degrees and a front right SAI of 10.0 degrees. The manufacturer's specification for SAI is 11.0 degrees +/- 0.5 degrees. All other angles are within specification. What is the most likely cause of the SAI discrepancy?Wheel Alignment Diagnosis, Adjustment, and Repair
  14. 114.A technician is performing an alignment on a vehicle. After setting all other angles, the technician notes that the front total toe is +0.20 degrees, and the specification is +0.05 to +0.15 degrees. The tie rod ends are adjusted by rotating a sleeve. To correct the total toe, what action should the technician take?Wheel Alignment Diagnosis, Adjustment, and Repair
  15. 115.A client complains that their vehicle's steering wheel is difficult to turn only when the engine is cold, but eases up after the vehicle has been driven for several minutes. The power steering fluid level is full and appears clean. Which of the following is the MOST probable cause?Steering System Diagnosis and Repair
  16. 116.A customer complains that their vehicle's power steering system works normally when driving straight, but becomes 'heavy' and requires significantly more effort to turn the steering wheel when parking or maneuvering at very low speeds. There are no fluid leaks, unusual noises, or warning lights illuminated. Which of the following is the MOST likely cause?Steering System Diagnosis and Repair
  17. 117.A customer reports that their vehicle's steering feels 'heavy' and requires significantly more effort to turn, particularly when the engine is cold. As the engine warms up, the steering effort improves slightly but remains higher than normal. The power steering fluid level is correct and appears clean. What is the MOST likely cause of this condition?Steering System Diagnosis and Repair
  18. 118.A technician is diagnosing a power steering system that exhibits a hard steering condition in one direction (e.g., hard to turn right, normal to turn left). The power steering pump output pressure is normal in both directions during a static test. What is the MOST likely cause?Steering System Diagnosis and Repair
  19. 119.A technician is diagnosing a vehicle with a manual steering gearbox that exhibits excessive free play at the steering wheel. The technician confirms that all steering linkage components (tie rod ends, drag link, pitman arm, idler arm) have no discernible play. What is the MOST likely cause of the excessive free play?Steering System Diagnosis and Repair
  20. 120.A vehicle with hydraulic power steering exhibits a noticeable 'squeal' or 'chirp' when the steering wheel is turned quickly, especially during cold starts. The fluid level is correct and the fluid appears clean. Which of the following is the MOST likely cause?Steering System Diagnosis and Repair
  21. 121.A technician is performing a four-wheel alignment on a vehicle and observes that the front right camber is +1.5 degrees, while the specification is 0.0 degrees +/- 0.5 degrees. The vehicle has an adjustable lower control arm. Which adjustment should the technician make to correct this condition?Wheel Alignment Diagnosis, Adjustment, and Repair
  22. 122.A vehicle equipped with an electric power steering (EPS) system has a warning light illuminated on the dashboard and exhibits a complete loss of power assist. A scan tool reveals DTC C0550, indicating an internal control module fault. What is the MOST likely repair for this condition?Steering System Diagnosis and Repair
  23. 123.A technician is performing an alignment on a vehicle with a MacPherson strut front suspension. The alignment machine shows the front left camber at -1.5 degrees and the front right camber at +0.5 degrees. The specification is 0.0 to -0.5 degrees with a maximum cross-camber (split) of 0.5 degrees. The vehicle's strut assembly has slotted holes on the lower mounting bolts. What is the most effective method to adjust the camber?Wheel Alignment Diagnosis, Adjustment, and Repair
  24. 124.A vehicle is brought in for an alignment check after a customer complaint of 'wandering' at highway speeds. The alignment machine shows the following front readings: Left Caster +1.0 degrees, Right Caster +1.5 degrees, Left Camber -0.5 degrees, Right Camber -0.5 degrees, Total Toe +0.25 inches. The specifications are: Caster +2.0 to +3.0 degrees (max split 0.5 degrees), Camber -0.75 to -0.25 degrees (max split 0.5 degrees), Total Toe +0.05 to +0.15 inches. Which adjustment is MOST likely contributing to the 'wandering' complaint?Wheel Alignment Diagnosis, Adjustment, and Repair
  25. 125.A technician is performing a pre-alignment inspection and discovers that the steering wheel is off-center when the front wheels are pointing straight ahead. The customer reports no pulling or abnormal tire wear. What is the MOST appropriate adjustment to correct the steering wheel position?Steering System Diagnosis and Repair
  26. 126.After performing an alignment, a technician notices that the front left included angle is 10.0 degrees and the front right included angle is 12.0 degrees. The specification for included angle is 11.0 degrees +/- 0.5 degrees. This discrepancy, with other angles in spec, most accurately points to a problem with which component?Wheel Alignment Diagnosis, Adjustment, and Repair
  27. 127.A vehicle equipped with an electric power steering (EPS) system has a persistent 'binding' or 'notchiness' felt in the steering wheel, particularly at low speeds or when turning from a stop. No DTCs are present. The technician confirms adequate battery voltage and proper EPS module power/ground. Which of the following is the MOST likely cause?Steering System Diagnosis and Repair
  28. 128.A technician is performing an alignment on a vehicle and observes that the included angle is significantly different between the left and right front wheels, while the camber and steering axis inclination (SAI) are within specifications for both sides. Which of the following is the MOST likely cause?Wheel Alignment Diagnosis, Adjustment, and Repair
  29. 129.A vehicle arrives with a complaint of poor steering wheel returnability after turns and a tendency to wander at high speeds. The alignment machine shows a front left caster of +0.5 degrees and a front right caster of +0.3 degrees. The manufacturer specification for caster is +2.0 degrees +/- 0.5 degrees. Which of the following is the most likely cause of the customer's complaint?Wheel Alignment Diagnosis, Adjustment, and Repair
  30. 130.A technician is diagnosing a vehicle with a double wishbone front suspension. The customer reports a 'creaking' noise heard at low speeds, particularly when turning or going over small bumps. Upon inspection, the technician notices a torn boot on the upper ball joint and feels slight play when prying the wheel up and down. Which of the following is the MOST likely cause of the noise and play?Suspension System Diagnosis and Repair
  31. 131.A technician is diagnosing a vehicle with a MacPherson strut front suspension that exhibits a 'popping' or 'binding' noise from the front left wheel when turning the steering wheel sharply at low speeds. The noise is also sometimes heard when going over small bumps. A visual inspection reveals no play in the ball joints or tie rod ends, and the strut itself shows no leaks. Which of the following is the MOST likely cause of the noise?Suspension System Diagnosis and Repair
  32. 132.A vehicle with an active suspension system experiences a sudden drop in ride height on one corner while driving, immediately followed by a 'suspension fault' warning light on the dashboard. The vehicle then drives with a noticeably harsher ride on that specific corner. A scan tool shows a DTC indicating a 'short to ground' in the circuit for the damper control valve on the affected corner. Which of the following is the MOST likely cause of these symptoms?Suspension System Diagnosis and Repair
  33. 133.A vehicle with an active suspension system that utilizes magnetorheological (MR) fluid dampers suddenly develops a very stiff and unresponsive ride. A scan tool shows no communication with the front left MR damper control unit. The other dampers appear to be functioning normally. What is the MOST likely reason for the front left damper's stiff behavior?Suspension System Diagnosis and Repair
  34. 134.A vehicle with an electronically controlled air suspension system occasionally sags at one corner overnight, but typically returns to normal height after the engine is started and the compressor runs for a short period. There are no DTCs stored. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  35. 135.A technician is diagnosing a vehicle with a double wishbone front suspension that exhibits a 'clunking' noise when turning the steering wheel sharply at low speeds or when going over small bumps. The technician lifts the vehicle and notices excessive play when grasping the sway bar end link and attempting to move it by hand. What is the MOST likely cause of the noise?Suspension System Diagnosis and Repair
  36. 136.A technician is diagnosing a vehicle with a double wishbone front suspension. The customer reports a 'squeaking' noise that is most prominent when driving slowly over uneven surfaces or when turning the steering wheel at a standstill. The technician performs a visual inspection and lubricates various pivot points with silicone spray, which temporarily silences the noise. Which of the following components is the MOST likely source of the squeak?Suspension System Diagnosis and Repair
  37. 137.A client complains that their vehicle with a multi-link rear suspension feels 'loose' and unstable at highway speeds, especially when changing lanes. During an inspection, the technician observes significant play in one of the rear toe links. What is the MOST likely consequence of this issue?Suspension System Diagnosis and Repair
  38. 138.A customer complains of a recurring vibration that is felt primarily through the steering wheel, particularly at speeds between 45-60 MPH. The vibration lessens after the vehicle has been driven for a while and the tires warm up. The technician has already balanced the wheels and tires, and the problem persists. Which of the following is the MOST likely cause of this vibration?Suspension System Diagnosis and Repair
  39. 139.A vehicle equipped with a MacPherson strut suspension exhibits a 'boing' or 'twang' noise when turning the steering wheel at slow speeds. The technician inspects the strut assembly and finds no obvious damage to the spring or damper. Which component is MOST likely causing this noise?Suspension System Diagnosis and Repair
  40. 140.A vehicle equipped with an active suspension system featuring continuously variable dampers exhibits a constant, harsh ride over all road surfaces. A technician checks for fault codes but finds none. Visual inspection reveals no obvious damage. The technician suspects an electronic issue preventing proper damping adjustment. Which of the following is the LEAST likely cause given the symptoms and lack of codes?Suspension System Diagnosis and Repair
  41. 141.A technician is inspecting a vehicle with a double wishbone front suspension. The customer reports a constant squeaking noise coming from the front end, especially noticeable over small bumps and during low-speed turns. Upon inspection, the technician notices slight surface rust and dried-out rubber on the upper control arm bushings. Which of the following is the MOST likely cause of the squeaking noise?Suspension System Diagnosis and Repair
  42. 142.A vehicle with an active suspension system that uses continuously variable dampers is diagnosed with a persistent knocking noise from the left front when driving over small bumps. The technician observes that the noise is consistent and not related to steering input. No diagnostic trouble codes are present. Which of the following is the MOST likely cause of the knocking noise?Suspension System Diagnosis and Repair
  43. 143.A technician is performing a pre-alignment inspection on a vehicle with a MacPherson strut front suspension. The customer reports a 'popping' noise from the front end when turning the steering wheel sharply at low speeds. During the inspection, the technician notices that the coil spring on the affected side appears to be 'twisted' relative to its normal seated position on the strut. Which component is MOST likely at fault?Suspension System Diagnosis and Repair
  44. 144.A vehicle with a multi-link front suspension experiences a harsh 'thump' noise when going over small, sharp bumps, particularly at lower speeds. The technician inspects the suspension and finds no visible damage to control arms, ball joints, or sway bar links. What component is MOST likely causing this specific noise in a multi-link setup?Suspension System Diagnosis and Repair
  45. 145.A technician is diagnosing a vehicle with an active suspension system that uses continuously variable dampers. The customer reports that the vehicle rides 'too stiff' over bumps and road imperfections, even in comfort mode, and doesn't seem to adapt to changing road conditions. A scan tool reveals no Diagnostic Trouble Codes (DTCs) related to the suspension system. Which of the following is the MOST likely cause of this condition?Suspension System Diagnosis and Repair
  46. 146.A technician is performing a pre-alignment inspection on a vehicle with MacPherson struts. The customer reports a 'thump' noise when going over speed bumps and a general feeling of looseness in the front end. The technician observes that the upper strut mount is visibly collapsed and the rubber isolator is cracked. What is the MOST likely impact of this condition on vehicle alignment and handling?Suspension System Diagnosis and Repair
  47. 147.A technician is performing a pre-alignment inspection on a vehicle with a MacPherson strut front suspension. The customer complains of a loose steering feel and wandering at highway speeds. During the inspection, the technician notices significant play when grasping the top and bottom of the wheel and rocking it in and out. Which of the following components is MOST likely worn?Suspension System Diagnosis and Repair
  48. 148.A vehicle with an electronically controlled air suspension system occasionally sags at one corner overnight but re-levels correctly after starting the engine. There are no diagnostic trouble codes (DTCs) present. The technician performs a soap bubble test on all air lines and fittings at that corner but finds no leaks. Which of the following is the MOST likely cause of this intermittent sag?Suspension System Diagnosis and Repair
  49. 149.A customer complains of a noticeable 'thumping' or 'clunking' noise from the front suspension of their vehicle, especially when going over speed bumps or large dips. The noise is more prominent when the suspension compresses quickly. Inspection reveals no play in ball joints, tie rods, or control arm bushings, and the strut appears to be intact. However, a close examination of the strut shaft area reveals a torn or degraded bump stop. Which of the following is the MOST likely cause of the noise?Suspension System Diagnosis and Repair
  50. 150.A customer complains of a vehicle pulling to the right and accelerated wear on the outer edge of the right front tire. The technician inspects the suspension and finds no loose components. Alignment readings show the following: Left Front Camber: +0.5° Right Front Camber: +0.5° Left Front Caster: +3.0° Right Front Caster: +2.0° Left Front Toe: +0.10° Right Front Toe: +0.10° Which of the following alignment angles is MOST likely contributing to the customer's complaint?Suspension System Diagnosis and Repair