ASE A4 Steering Suspension Practice Test

1. On cold mornings, the warning lamp on a vehicle with a TPMS tire pressure monitoring system stays illuminated for several minutes before it goes out. Which of these is MOST likely the cause of this condition.

  • A. Clogged TPMS sensor.
  • B. Worn tread on one of the tires.
  • C. TPMS initialization.
  • D. Low tire pressure.


Answer A is wrong. The ASE A4 Suspension and Steering test has a few questions that require an understanding of automotive electrical or electronic systems. The TPMS sensor has a port to sense the tires air pressure. If the port becomes clogged, the sensor will indicate low air pressure to the module and the TPMS light will be illuminated and stay illuminated until repaired. Tires heat up as the vehicle is driven, raising the tires air pressure to acceptable levels. These levels are located on a sticker on the drivers side door or door jam.

Answer B is wrong. The TPMS sensor senses air pressure not the tread depth of the tire.

Answer C is wrong. Initialization is a process of synchronizing a sensor to the controller. It senses and registers important information like the sensors ID.

Answer D is correct. When the light stays on for several minutes of driving and then goes out, one of the tires could have low air pressure. As the tire heats from driving, the air pressure increases and the light goes out. Check all four tires and the spare for proper air pressure.

2. There is a growling sound on the RF of a passenger car that changes pitch on different road surfaces. Which of the following is MOST likely causing this condition?

  • A. Cupped tires.
  • B. Bad wheel bearing.
  • C. Excessive positive caster.
  • D. Excessive negative caster.


Answer A is correct. A cupped or scalloped tire changes pitch from one surface to another. This is true with all tires, but much more pronounced with a cupped or scalloped tire.

Answer B is wrong. A worn wheel bearing will also cause a growling sound in operation. There is a difference. A worn wheel bearing does not contact the road so it doesn’t change pitch on different road surfaces. It makes a growling or whining noise that increases with speed and while turning.

Answer C is wrong. Answer A is correct.

Answer D is wrong. Answer A is correct.

3. The steering wheel grabs and binds only at certain points along the steering wheel’s rotation. Technician A says the steering shaft universal joint is binding and should be inspected for wear. Technician B says the intermediate shaft may need to be replaced. Which technician is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B


Answer A is wrong. Both technicians are correct. Due to its design, the steering shaft coupling can bind, often at certain points during a steering wheel’s rotation.

Answer B is wrong. Intermediate shafts also contain universal couplings.

Answer C is correct. Both Technicians are correct.

Answer D is wrong. Both Technicians are correct.

4. There’s a squeak in the steering column when the steering wheel is turned in either direction. All of the following components will result in a noisy steering column EXCEPT.

  • A. Steering coupling
  • B. Clockspring
  • C. Steering column bearings
  • D. Horn switch


Answer A is wrong. The universal steering coupling connects the stub of the steering column to the steering gear. They become loose or bind resulting in excessive noise

Answer B is wrong. The clockspring provides a connection between the steering column the SRS air bag and the wheel’s accessories.

Answer C is wrong. Steering column bearings cause a growl or squeak when worn. There’s a bearing located at the top and bottom of the steering shaft.

Answer D is correct. The horn switch is stationary when the wheel is turned. It’s located in the steering wheel. A faulty horn switch likely has burned contacts and will hamper operation of the horn but would not make noise when the wheel is turned.

5. Technician A says a worn idler arm has no affect on a vehicle's total toe setting. Technician B says the center link is used in parallelogram linkage systems. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B


Answer A is wrong. A bad idler arm will affect toe settings.

Answer B is correct. The center link is found on parallelogram linkage systems.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.