Lincoln Navigator: Parking Aid / Elevation System Check. General Procedures
Check
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Turn the ignition ON, engine OFF.
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Set the parking brake.
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Place the gearshift in REVERSE (R) for rear parking aid sensors.
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Place the gearshift in DRIVE (D) for front parking aid sensors.
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Using a diagnostic scan tool, monitor the parking aid
sensor distance Parameter Identifications (PIDs) to verify no objects
are detected.
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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.
Check
NOTE:
The object used in this system check can be
fabricated using a 9 cm diameter (3 in I.D.) pipe, 100 cm (39 in) in
length (available as Polyvinyl Chloride (PVC) pipe, or similar from a
hardware or plumbing supply...
Removal
NOTE:
Removal steps in this procedure may contain installation details.
NOTE:
RH side shown, LH side similar.
With the vehicle in NEUTRAL, position it on a hoist...
Other information:
Removal
Remove the engine appearance cover retainers, release
the engine appearance cover from the rear retainers and then remove the
engine appearance cover.
Remove the RH side air cleaner outlet pipe...
Symptom Chart(s)
Symptom Chart: Symptom Chart - Exhaust System
Verify
the customer concern. Inspect the components of the exhaust system for
obvious signs of damage or other mechanical concerns using the following
chart.
Visual Inspection Chart - Mechanical
Mechanical
Exhaust pipe pinched or crushed
Damage..