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ASE A4 Suspension and Steering practice questions

210 free questions with answers and explanations.

Practice test
  1. 151.A customer complains of a low-frequency hum or drone that is audible from the front of the vehicle, particularly between 40-60 mph. The sound changes pitch slightly when turning left or right and does not typically change with engine RPM. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  2. 152.A client complains their vehicle with a multi-link rear suspension exhibits excessive tire wear on the inner shoulder of the right rear tire. They also report that the vehicle feels 'unstable' when driving at highway speeds. A visual inspection reveals no obvious damage to suspension components. Which of the following alignment angles is MOST likely out of specification, causing these symptoms?Suspension System Diagnosis and Repair
  3. 153.A technician is diagnosing a vehicle with an active suspension system that utilizes magnetorheological fluid dampers. The customer reports a noticeable decrease in ride comfort and responsiveness, with the vehicle feeling 'floaty' at high speeds and 'harsh' over bumps. Diagnostic trouble codes indicate a 'Damper Control Solenoid Circuit Open' for the right rear damper. Which of the following is the MOST likely impact on the damper's operation due to this fault?Suspension System Diagnosis and Repair
  4. 154.A client complains their vehicle with MacPherson struts exhibits excessive body roll when cornering and feels overly soft over bumps, almost bottoming out occasionally. During a visual inspection, the technician notices no obvious leaks from the struts, but the vehicle's ride height appears lower than specifications on all four corners. Which of the following is the MOST likely cause of these symptoms?Suspension System Diagnosis and Repair
  5. 155.A vehicle with an active suspension system that uses magnetorheological (MR) fluid dampers is brought in with a complaint of a consistently harsh ride on one side of the vehicle, despite the drive mode selector being set to 'comfort'. A scan tool shows no active DTCs related to the suspension. During a visual inspection, the technician notices that the electrical connector to the affected damper appears corroded. Which of the following is the MOST likely cause of the harsh ride?Suspension System Diagnosis and Repair
  6. 156.A customer complains of a persistent 'clunking' noise from the front suspension of their vehicle equipped with MacPherson struts, particularly noticeable when driving over small bumps or uneven surfaces. The noise seems to be more pronounced on the driver's side. After a thorough visual inspection and shake test, the technician finds no play in the ball joints or tie rod ends, and the strut itself appears to be dry with no leaks. Which of the following components is MOST likely causing the noise?Suspension System Diagnosis and Repair
  7. 157.A technician is performing a pre-alignment inspection on a vehicle with a MacPherson strut front suspension. The customer complains of a 'drifting' feeling and reduced steering effort at highway speeds, requiring constant small steering corrections. The vehicle does not pull significantly to one side. During inspection, the technician notices that the upper strut mount appears to be shifted slightly rearward. Which alignment angle is MOST likely affected by this condition?Suspension System Diagnosis and Repair
  8. 158.A technician is performing a pre-alignment inspection on a vehicle with a multi-link front suspension. The vehicle exhibits uneven tire wear and a slight pull to the right. During the inspection, the technician notices that the front subframe is visibly shifted to the left by approximately 5mm relative to the chassis. How would this subframe shift PRIMARILY affect the front end alignment, assuming all other components are within tolerance?Suspension System Diagnosis and Repair
  9. 159.A technician is inspecting a vehicle with a double wishbone front suspension. The customer reports a 'clunking' noise coming from the front end, particularly when going over bumps or during hard braking. The technician observes excessive play when prying on the lower ball joint with a pry bar. Additionally, the ball joint boot is torn. Which of the following is the MOST appropriate next step?Suspension System Diagnosis and Repair
  10. 160.A technician is performing a pre-alignment inspection on a vehicle with a MacPherson strut front suspension. The customer reports excessive tire wear on the outer edges of both front tires. During the inspection, the technician notices that the top of both front tires lean outward. Which of the following alignment angles is MOST likely out of specification?Suspension System Diagnosis and Repair
  11. 161.A technician is diagnosing a vehicle with a clunking noise heard over bumps. The noise is more pronounced when turning. Upon inspection, the technician notices excessive play in the inner tie rod end. Which of the following is the MOST likely cause of this condition?Suspension System Diagnosis and Repair
  12. 162.A technician is diagnosing a vehicle with a multi-link rear suspension that exhibits a noticeable 'squeak' when going over speed bumps or when the rear of the vehicle is loaded. The noise is intermittent and seems to come from the lower part of the suspension. A visual inspection reveals no torn boots or obvious damage, but some of the rubber bushings on the lower control arms appear dry and slightly cracked. Which of the following is the MOST appropriate initial diagnostic step?Suspension System Diagnosis and Repair
  13. 163.A technician is performing a pre-alignment inspection on a vehicle with a MacPherson strut front suspension. The customer reports that the vehicle feels 'nervous' or 'twitchy' at highway speeds and requires constant small steering corrections to maintain a straight path. The technician notes that the steering wheel does not consistently return to center after a turn. Which of the following alignment angles is MOST likely incorrect?Suspension System Diagnosis and Repair
  14. 164.A vehicle with a multi-link rear suspension exhibits a noticeable 'wobble' or 'shimmy' from the rear wheels, especially when accelerating or braking. The customer also reports uneven tire wear on the inner edges of the rear tires. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  15. 165.A vehicle with an active suspension system that uses magnetorheological (MR) fluid dampers is brought in for a diagnostic. The customer reports that the ride quality is intermittently harsh and then unusually soft, accompanied by a 'Service Suspension' light. A scan tool shows a DTC for 'Damper Control Valve Circuit Intermittent Open' for the right front damper. What is the MOST likely behavior of the right front MR damper when this intermittent open circuit occurs?Suspension System Diagnosis and Repair
  16. 166.A technician is diagnosing a vehicle with a double wishbone front suspension that exhibits a persistent squeaking noise, particularly noticeable when driving slowly over uneven surfaces or when turning the steering wheel at a standstill. The noise is present even after lubricating accessible rubber components. Which of the following is the MOST likely source of the squeak?Suspension System Diagnosis and Repair
  17. 167.A vehicle with an active ride control system (e.g., magnetic ride control) is diagnosed with a persistent 'hard' ride on all four corners, despite changing driving modes. There are no active DTCs, and a visual inspection shows no obvious damage. The technician suspects a problem with the magnetic fluid in the dampers. What is the MOST likely condition of the magnetic fluid that would cause this symptom?Suspension System Diagnosis and Repair
  18. 168.A vehicle with an active suspension system featuring continuously variable dampers exhibits a persistent harsh ride quality and occasional 'thumping' noises over road imperfections. A scan tool reveals no diagnostic trouble codes (DTCs) related to the suspension system, but live data shows all damper control valves are commanded to a 'firm' setting even on smooth roads. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  19. 169.A vehicle equipped with an air suspension system exhibits a consistent sag on the right front corner after being parked overnight. When the engine is started, the air compressor runs for an extended period, and the right front corner eventually rises to the correct height. The system holds pressure normally throughout the day while driving. Which of the following is the MOST likely cause of this condition?Suspension System Diagnosis and Repair
  20. 170.A vehicle with a multi-link rear suspension exhibits a 'clunking' noise from the rear when accelerating or braking. The technician suspects a worn component. Which of the following is MOST likely the cause?Suspension System Diagnosis and Repair
  21. 171.A vehicle with an active suspension system experiences a sudden drop in ride height on one corner and displays a 'Suspension Fault' warning. The technician connects a diagnostic scanner and retrieves a DTC indicating an open circuit in the left front ride height sensor. What is the MOST immediate consequence of this fault for the active suspension system?Suspension System Diagnosis and Repair
  22. 172.A vehicle with an active air suspension system is exhibiting a consistent pull to the left, and the left front ride height appears to be slightly higher than the right front. A technician attempts to recalibrate the ride height sensors, but the issue persists. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  23. 173.A vehicle with an active air suspension system is exhibiting a consistent pull to the left at highway speeds, even on a flat road. The customer also reports that the left front of the vehicle appears slightly lower than the right front. Diagnostic trouble codes are present for 'Left Front Ride Height Sensor Out of Range'. Which of the following is the MOST appropriate initial diagnostic step?Suspension System Diagnosis and Repair
  24. 174.A technician is diagnosing a vehicle with a double wishbone front suspension that exhibits excessive body roll during cornering, despite having no noticeable leaks from the shock absorbers. Which of the following components is MOST likely worn or damaged?Suspension System Diagnosis and Repair
  25. 175.A customer complains of a vehicle pulling to one side and uneven tire wear on a vehicle with a double wishbone suspension. After performing a visual inspection, the technician notes no bent components or obvious damage. Which of the following alignment angles is MOST likely out of specification and would cause these symptoms?Suspension System Diagnosis and Repair
  26. 176.A technician is diagnosing a vibration that is felt primarily through the steering wheel at speeds between 45-60 mph, but tends to diminish at higher speeds. The vibration is present during acceleration and coasting. The customer recently had new tires installed and balanced. Which of the following is the MOST likely cause of this vibration?Suspension System Diagnosis and Repair
  27. 177.A technician is diagnosing a vehicle equipped with an advanced active suspension system that uses continuously variable dampers. The customer complains that the vehicle feels overly harsh and bouncy over bumps, almost as if the active damping is not functioning. Diagnostic trouble codes indicate a 'Damper Position Sensor Signal Intermittent' for the left front wheel. Which of the following is the MOST appropriate next diagnostic step?Suspension System Diagnosis and Repair
  28. 178.A technician is diagnosing a luxury vehicle with an active suspension system that uses continuously variable dampers. The customer reports that the vehicle feels 'floaty' and exhibits excessive body roll during cornering, despite selecting the 'Sport' driving mode. A diagnostic scan reveals no active DTCs related to the suspension system. Which of the following is the MOST likely cause of these symptoms?Suspension System Diagnosis and Repair
  29. 179.A technician is performing a diagnostic on a vehicle with a multi-link front suspension. The customer reports a shimmy or wobble in the steering wheel during braking from highway speeds, which diminishes as the vehicle slows down. The technician confirms the complaint during a road test. A visual inspection reveals no obvious play in ball joints or tie rod ends, and the tires appear to have even wear. Which of the following is the MOST likely cause of this braking-induced vibration?Suspension System Diagnosis and Repair
  30. 180.A vehicle with an air suspension system exhibits a consistent sag on the right front corner overnight, but the compressor eventually raises it to the correct height once the engine is started. There are no DTCs related to the compressor or valve block. What is the MOST likely cause of this specific symptom?Suspension System Diagnosis and Repair
  31. 181.A vehicle with an active suspension system is exhibiting intermittent harshness and a 'thump' when driving over small bumps, despite a visual inspection showing no obvious leaks or damage to the struts. A scan tool reveals a 'Damper Control Valve Circuit Malfunction' code for one of the front struts. What is the MOST likely cause of the harshness?Suspension System Diagnosis and Repair
  32. 182.A technician is inspecting a vehicle with a double wishbone front suspension. The customer reports a clunking noise when turning at low speeds and a loose steering feel. Upon inspection, the technician notices excessive play in the upper control arm mount points. Which of the following is the MOST likely cause of these symptoms?Suspension System Diagnosis and Repair
  33. 183.A technician is performing a diagnostic on a vehicle with a double wishbone front suspension. The customer reports a noticeable 'creaking' or 'squeaking' noise, especially when driving over uneven pavement or speed bumps at low speeds. The noise is intermittent and seems to come from the front right side. After a visual inspection, no obvious damage or leaks are found. Which of the following is the MOST appropriate next diagnostic step?Suspension System Diagnosis and Repair
  34. 184.A client complains that their vehicle with a multi-link rear suspension feels unstable and 'wanders' at highway speeds. During a pre-alignment inspection, the technician observes that the rear wheels appear to be pointing slightly inward when viewed from above (toe-in). Which of the following components would MOST likely be adjusted to correct this condition?Suspension System Diagnosis and Repair
  35. 185.A client complains that their vehicle with MacPherson struts clunks loudly when going over speed bumps or potholes. The technician notes that the noise is a single, sharp impact sound rather than a continuous rattle or creak. During inspection, the technician finds that the sway bar end links and bushings are in good condition. What is the MOST likely cause of this specific clunking noise?Suspension System Diagnosis and Repair
  36. 186.A technician is diagnosing a vehicle with a multi-link rear suspension. The customer reports an intermittent 'wobble' or 'shimmy' sensation from the rear of the vehicle, particularly noticeable during highway driving or when changing lanes. Inspection reveals no loose wheel bearings or obviously bent wheels. Which of the following components is MOST likely contributing to this condition?Suspension System Diagnosis and Repair
  37. 187.A technician is diagnosing a vibration that is felt primarily through the seats and floorboard at highway speeds (60-75 mph) but is not significantly affected by braking or accelerating. The vibration is present regardless of whether the vehicle is in gear or coasting. After balancing all four tires, the vibration persists. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  38. 188.A vehicle with multi-link rear suspension exhibits excessive tire wear on the outer shoulder of the rear tires and a noticeable 'loose' feeling in the rear end during cornering. This condition is present even after a recent alignment. The technician suspects worn bushings. Which of the following multi-link components, when worn, would MOST directly cause these symptoms?Suspension System Diagnosis and Repair
  39. 189.A vehicle with an air suspension system consistently sags overnight on the front left side, but reinflates to the correct height when the engine is started. The air compressor runs normally and no fault codes are present. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  40. 190.A vehicle with an air suspension system exhibits a consistent lean to one side, even after sitting overnight. The air compressor runs frequently, and the lean persists despite the compressor's efforts. After inspecting the lines and fittings, the technician finds no obvious leaks. Performing a soap bubble test reveals a slow, intermittent leak from the crimp area where the air spring connects to its top plate. Given this finding, which of the following is the MOST appropriate next step?Suspension System Diagnosis and Repair
  41. 191.A luxury sedan equipped with an active suspension system featuring magnetorheological (MR) dampers exhibits a constant harsh ride and poor wheel control, particularly over rough roads. The suspension control module reports a 'Damper Control Circuit Open' fault code for the front left damper. The technician measures infinite resistance across the damper's electrical connector. Which of the following is the MOST likely cause of the harsh ride and fault code?Suspension System Diagnosis and Repair
  42. 192.A vehicle equipped with a double-wishbone front suspension exhibits a noticeable 'squeak' or 'groan' noise when going over speed bumps or turning slowly. The technician performs a visual inspection and notes that the lower control arm bushings appear intact with no visible cracks or tears. However, while bouncing the suspension, the noise is consistently reproduced. Which of the following diagnostic steps should the technician perform NEXT to pinpoint the cause?Suspension System Diagnosis and Repair
  43. 193.A vehicle with an active suspension system that uses continuously variable dampers (CVD) exhibits inconsistent ride quality, ranging from overly harsh to excessively soft, with no specific fault codes stored in the suspension control module. The technician performs a road test and observes that the damping characteristics change erratically, sometimes feeling stiff over small bumps and then soft over larger undulations. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  44. 194.A technician is diagnosing a vehicle with a double-wishbone front suspension. The customer complains of a 'clunking' noise from the front end, particularly noticeable when driving over small, sharp bumps or potholes. During inspection, the technician notices that the rubber boot on the upper ball joint is torn, but there is no visible play when prying the wheel up and down. However, the noise is consistently reproduced when applying and releasing pressure on the control arm with a pry bar. Which of the following is the MOST likely cause of the noise?Suspension System Diagnosis and Repair
  45. 195.A vehicle with MacPherson strut front suspension exhibits a persistent, rhythmic 'thumping' noise that is directly proportional to road speed. The noise is more pronounced when turning corners, especially on the side opposite the turn (e.g., turning left, noise from the right). The technician lifts the vehicle and finds no play in ball joints or tie rod ends. However, spinning the wheels by hand reveals a slight roughness and a faint grinding sound from the right front wheel area. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  46. 196.A client complains that their vehicle with a multi-link rear suspension exhibits a 'squishy' or 'floating' sensation in the rear end, especially during spirited driving or when carrying a heavy load. The technician performs a visual inspection and finds no obvious leaks from the shock absorbers or damage to the coil springs. However, when bouncing the rear of the vehicle, it oscillates several times before settling. Which of the following is the MOST likely cause of these symptoms?Suspension System Diagnosis and Repair
  47. 197.A vehicle with a multi-link rear suspension exhibits a 'wandering' sensation at highway speeds and uneven tire wear, specifically feathering on the inner shoulder of both rear tires. The technician inspects the suspension and finds no visible play in any components. A four-wheel alignment reveals that both rear toe settings are significantly out of specification, showing excessive toe-out. Which of the following is the MOST likely cause of these symptoms?Suspension System Diagnosis and Repair
  48. 198.A technician is diagnosing a vehicle with a multi-link rear suspension. The customer reports a noticeable 'thump' or 'clunk' when accelerating or braking hard. Upon inspection, the technician observes excessive play in one of the rear control arm bushings. Which of the following is the MOST likely cause of the reported noise?Suspension System Diagnosis and Repair
  49. 199.A vehicle with a multi-link rear suspension exhibits a noticeable 'crabbing' sensation, where the rear of the vehicle feels like it's trying to move sideways, especially during lane changes or cornering. The customer also reports accelerated and uneven tire wear on the outer shoulders of the rear tires. A thorough inspection reveals no loose components, but a four-wheel alignment shows that the rear thrust angle is significantly out of specification. Which of the following is the MOST likely cause?Suspension System Diagnosis and Repair
  50. 200.A technician is performing a pre-purchase inspection on a vehicle. They observe that the inner shoulder of both front tires shows significantly more wear than the outer shoulder. This condition is indicative of:Wheels and Tires Diagnosis and Repair