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Practice questions · 310B D

Repairs mechanical, electrical and alternative-fuel system components

2 questions from this exam area, each with the full explanation shown — not just the answer. Free, no account.

12% of the exam

1

After a structural repair and wheel alignment, the lane keep assist makes small steering corrections on a straight road and no fault codes are stored. What is the most likely cause?

  1. The windshield wipers are worn
  2. The tire pressures are 7 kPa (1 psi) apart side to side, so the vehicle drifts and the system keeps steering it back into the lane
  3. The refinish colour on the bumper cover is too dark, so the lane keep assist misjudges the lane markings and steers to correct
  4. The steering angle sensor was not calibrated after the alignment, so the system reads a steering input that is not thereAnswer

Why that is right

The steering angle sensor feeds systems such as lane keep assist. If the alignment changed the straight-ahead position and the sensor was not zeroed, the system believes the wheel is turned and corrects for it. The vehicle maker's calibration is carried out.

Why the other options are wrong

  • A. Worn wipers affect visibility in rain, not steering input on a dry straight road.
  • B. A difference that small does not produce steering corrections.
  • C. Colour does not affect a camera-based lane system.

2

How is a steering angle sensor typically calibrated after a wheel alignment?

  1. Disconnect the battery for ten minutes
  2. Turn the steering wheel from lock to lock five times with the engine off
  3. Put the wheels in the straight-ahead position and zero the sensor with a scan toolAnswer
  4. Replace the clockspring

Why that is right

The process is normally done by putting the wheels in the straight-forward position and zeroing the sensor with a scan tool. Sometimes the vehicle must be on an alignment rack.

Why the other options are wrong

  • A. A battery reset does not teach the sensor where straight ahead is.
  • B. That is not the routine I-CAR describes; the zero point is normally stored with a scan tool, with the wheels straight ahead.
  • D. The clockspring carries the air bag circuit; it is not a calibration step.

Exam-style practice written to the published Red Seal standard. These are not real exam questions — the official Red Seal sample questions are deliberately excluded from everything we publish.

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