Lincoln Navigator: Parking Aid / Elevation System Check. General Procedures

Check

1. Turn the ignition ON, engine OFF.
   

1. Set the parking brake.
   

1. Place the gearshift in REVERSE (R) for rear parking aid sensors.
   

1. Place the gearshift in DRIVE (D) for front parking aid sensors.
   

1. Using a diagnostic scan tool, monitor the parking aid sensor distance Parameter Identifications (PIDs) to verify no objects are detected.
   

1. If the audible warning is heard or if the Parameter Identifications (PIDs) indicate an object is detected, check to make sure the bumper is correctly installed and is not tilted downward so the sensor is pointing at the ground. Refer to Diagnosis and Testing.