Which of the following is true when inspecting wheel speed sensors?

When inspecting wheel speed sensors, measuring the air gap between the sensor and the reluctor wheel teeth is a crucial step. This air gap is essential for the proper functioning of the sensor, as it needs to be within a specific range to accurately detect the rotational speed of the wheel. If the gap is too wide or too narrow, it can lead to inaccurate readings, which can affect the performance of systems like anti-lock brakes (ABS) and traction control.

Maintaining the correct air gap ensures that the sensor can generate an appropriate voltage signal in response to the movement of the reluctor wheel. This measurement is typically specified in the vehicle's service manual and should be adhered to during inspections to ensure optimal performance and safety of the braking system.