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The A4 exam has 50 questions and runs 1 hour.
These 10 free A4 questions are organized by exam domain, so you can see how each part of the ASE Automobile and Light Truck Certification Test A4: Suspension and Steering blueprint is tested. Reveal the answer and explanation under each question.
A power steering system is tested with a gauge and shutoff valve installed between the pump and the steering gear. With the valve momentarily closed, pressure reads 1,450 psi. With the valve open and the steering wheel held against a stop, pressure reads 1,050 psi. Specification is 1,400-1,500 psi in both conditions. Which is the MOST-Likely cause?
Correct answer: D - Internal leakage within the steering gear
A vehicle with electric power steering (EPS) develops heavy steering effort after roughly 20 minutes of repeated parking-lot maneuvering. Effort returns to normal after the vehicle sits for several minutes. Inspection finds no mechanical binding in the steering or suspension. Which is the MOST-Likely cause?
Correct answer: A - The EPS module is limiting assist to protect the motor from overheating
All of these are inputs used by a typical electric power steering (EPS) system EXCEPT:
Correct answer: C - Power steering pressure switch
A steering wheel must be removed on an SRS-equipped vehicle. Technician A says the SRS must be disabled using the manufacturer's specified procedure before the wheel is removed. Technician B says the steering wheel may be freed by striking the end of the steering shaft with a hammer if a puller is not available. Who is correct?
Correct answer: A - Technician A only
A vehicle has a wander complaint and excessive steering wheel freeplay. Which procedure will MOST reliably reveal worn steering linkage sockets?
Correct answer: B - Perform a dry-park test with the vehicle's full weight on the tires
A vehicle with hydraulic power steering has normal assist when turning left but noticeably heavy effort when turning right. Which is the MOST-Likely cause?
Correct answer: D - An internal fault in the steering gear's rotary control valve
A wear-indicator ball joint is being checked to determine whether replacement is required. How should the vehicle be positioned for this inspection?
Correct answer: C - Resting on the ground with the vehicle's full weight on the tires
A control arm with rubber bushings has been reinstalled. The technician torques the bushing through-bolts while the suspension hangs at full droop on the hoist. What is the MOST-Likely result?
Correct answer: A - The bushings will be preloaded in a twisted position and fail early
A vehicle equipped with electronically controlled air suspension is being raised on a hoist for suspension service. What must the technician do before lifting the vehicle?
Correct answer: D - Turn off the air suspension service switch as the manufacturer specifies
A rear-wheel-drive pickup with leaf spring rear suspension has rear tire wear and dog tracking. Inspection shows the rear axle is offset rearward on one side relative to the frame. Which component has MOST-Likely failed?
Correct answer: B - The leaf spring center bolt (center pin)
The A4 exam also covers these domains. Drill them in the full free practice test:
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