ASE A4 Test Prep – Suspension and Steering - Questions, Answers and Explanations All of the following could warrant replacement of a rack-and-pinion
... [Show More] inter tie-rod end EXCEPT: A. Torn bellows boot B. Failed articulation test C. Socket looseness D. Incorrect rack bearing preload A torn bellows boot would let dirt and grit get to the tie-rod end socket and could cause it to fail. Looseness in the socket or failing an articulation effort test would require replacement. Incorrect rack bearing preload would not affect the inner tie-rod end. Technician A says that all vehicles with strut-type front suspension require that the strut be removed to replace the front coil springs. Technician B says that the coil spring should be compressed before removal from an SLA-type front suspension. Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B The coil spring on a Short/Long Arm (SLA) suspension vehicle should be compressed with a suitable spring compressor before the ball joint is disconnected, so it can safely be removed. Technician A is wrong because on vehicles with modified struts, the coil spring is located between the lower control arm and frame, as on an SLA suspension vehicle, and the strut need not be removed to replace the coil spring. All of the following are methods used by manufacturers to attach ball joints to control arms EXCEPT: A. Riveted on B. Welded on C. Threaded on D. Pressed on Ball joints can be pressed, threaded or riveted onto control arms. Riveted joints are usually replaced with bolt on replacements after the rivets are removed. All of the following are true of torsion bars EXCEPT: A. They can be mounted longitudinally or transversely B. They serve the same function as coil springs C. They are interchangeable from side-to-side D. They can be used to adjust ride height Torsion bars are not normally interchangeable from side-to-side. This is because the direction of the twisting or torsion is not the same on the left and right sides.
Which of the following causes for ball joint replacement could also require steering knuckle replacement? A. Torn dust boot B. Worn ball and socket C. Wear indicator below surface D. Broken ballstud If the ballstud has broken, it is possible that the tapered hole in the steering knuckle has become distorted. You can check this by trying the new ball joint stud in the hole: if there is any free-play or if the new tapered stud can rock in the hole, the hole is rounded out. If this has occurred, the steering knuckle must be replaced. Technician A says that, when on-vehicle balancing a drive axle tire, the opposite wheel must also be supported off the ground if the vehicle is equipped with a limited-slip differential. Technician B says that rotating on-vehicle balanced tires presents no special problems. Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B If the vehicle is equipped with a limited-slip differential, raise the opposite wheel to be safe. Otherwise, the vehicle could either damage the differential or drive itself over the wheel chocks and cause an accident. Technician B is wrong because when wheels have been spin-balanced on the axle, they must be rebalanced whenever the tires are rotated. Technician A says that vehicle ride height is measured between the ground and the rocker panel. Technician B says that ride height is measured between suspension components. Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B Both technicians are right. Both measurements are commonly used. Consult the vehicle service manual for specifications and measuring locations. All of the following are sensors in an electronically controlled suspension system EXCEPT: A. Wheel speed sensor B. Wheel position sensor C. Vehicle speed sensor D. Height sensor The wheel speed sensor is used in anti-lock brake (ABS), traction control and stability control systems. All of the other sensors are used in electronically controlled suspension systems. A customer complaints that his vehicle stalls repeatedly while parallel parking. Technician A says that the IAC valve is the most likely cause. Technician B says that the power steering pressure sensor is at fault. Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B During parallel parking maneuvers, the steering wheel is turned against the stops while the vehicle is relatively stationary. This causes high pressure in the power steering system, which places a load on the engine. The power steering pressure sensor informs the PCM/ECM of this high pressure, causing the PCM/ECM to in turn adjust the IAC valve to raise the engine idle speed. If the sensor is faulty, the PCM/ECM will not receive the signal and the engine will stall under the increased load. Technician A is wrong because if the IAC valve was faulty, the vehicle could stall at any time, and not just when parallel parking. An upper control arm is being removed from a late model vehicle with SLA suspension. Technician A says that the lower arm should be supported with a jack stand close to the ball joint. Technician B says that the coil spring must be compressed with a spring compressor. Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B In an SLA suspension, the coil spring is located between the lower control arm and the vehicle frame. By supporting the lower arm near the ball joint, the weight of the vehicle will keep the coil spring compressed enough to allow removal of the upper control arm. If the lower control arm was being removed, then compressing the coil spring with a spring compressor would be necessary. A vehicle pulls to the right during braking. Technician A says that the problem is the brake system, and the pull is most likely due to brake fluid on the linings or a seized caliper piston. Technician B says that [Show Less]