Park / Neutral Position Switch On-Vehicle Inspection

Apply the parking brake and turn the ignition switch to ON.

Depress the brake pedal and check that the engine starts with the shift lever in N or P, but does not start in the other positions.

Check that the back-up light illuminates with the shift lever in R, but does not function in the other positions.
If a malfunction or failure is found, check the park/neutral position switch for continuity.