Lincoln Navigator: Seatbelt Systems / Seatbelt Systems - System Operation and Component Description. Description and Operation

System Operation

Emergency Locking Retractor (ELR)

All retractors have an Emergency Locking Retractor (ELR) mode, which is a vehicle-sensitive feature designed to activate and lock the seatbelt webbing during hard braking, cornering, or an impact of approximately 24 km/h (14.9 mph). The Emergency Locking Retractor (ELR) feature helps reduce the forward movement of the driver and passengers. For testing, see Functional Test - Seatbelt Retractor, Road Test Inspection.
Refer to: Seatbelt Systems (501-20A Seatbelt Systems, Diagnosis and Testing).

Automatic Locking Retractor (ALR)

The Automatic Locking Retractor (ALR) mode is used when locking a child seat in any passenger seating position. The Automatic Locking Retractor (ALR) mode automatically activates when the seatbelt webbing is fully extracted from the retractor and then allowed to retract. As the seatbelt webbing retracts back onto the spool, an audible clicking sound is made, indicating the seatbelt retractor is in Automatic Locking Retractor (ALR) mode and the seatbelt webbing cannot pull back out of the seatbelt retractor. The Automatic Locking Retractor (ALR) mode disengages when the webbing is allowed to fully retract back into the retractor. For testing, see Functional Test - Seatbelt Retractor, Automatic Locking Retractor (ALR) Mode,
Refer to: Seatbelt Systems (501-20A Seatbelt Systems, Diagnosis and Testing).

Web Sensing Retractor

All seatbelt retractors have web sensing mode, which is sensitive to seatbelt retractor spool speeds. The web sensing retractor mode is activated when the seatbelt webbing is extracted or retracted at a predetermined speed. The centrifugal force moves a lock into place stopping the retractor spool from paying out seatbelt webbing. To unlock the seatbelt retractor from this mode, only a few millimeters of seatbelt webbing are necessary to retract back onto the seatbelt retractor spool.

If the seatbelt webbing is in the stowed position and cannot be extracted,
Refer to: Locked Seatbelt Retractor Releasing (501-20A Seatbelt Systems, General Procedures).

Seatbelt Warning Chime and Indictor

For seatbelt warning chime and indicator operation,
Refer to: Warning Chimes - System Operation and Component Description (413-01 Instrumentation, Message Center and Warning Chimes, Description and Operation).

To diagnose the seatbelt warning chime and indicator,
Refer to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).

Belt-Minder®

For Belt-Minder® operation,
Refer to: Warning Chimes - System Operation and Component Description (413-01 Instrumentation, Message Center and Warning Chimes, Description and Operation).

To diagnose the Belt-Minder® feature,
Refer to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).

To activate or deactivate the Belt-Minder® feature,
Refer to: Seatbelt Minder Deactivating/Activating (413-01 Instrumentation, Message Center and Warning Chimes) .

Rear Occupant Alert System

The rear occupant alert system notifies through visual and audible notifications to check for potential rear seat occupants when the ignition is switched off. This feature is activated through the opening and closing of the rear doors prior to the ignition ON status. This is an operating characteristic of the vehicle and no repairs should be attempted. Refer to the Owner's Literature and rear occupant alert system for system operation and turning the system on and off.

Component Description

Seatbelt Buckle Switch

The seatbelt buckles contain integrated sensors that are Hall-effect switches. The seatbelt buckle sensor is serviced with the seatbelt buckle.

Child Safety Seat Tether Anchor

Child safety seat tether anchors are provided at all the second and third row seat positions. They are part of the seat backrest frame and repair should not be attempted, install a new backrest frame.

If a child safety seat was in use during a collision, inspect the child safety seat tether anchor and mounting areas and restore the vehicle to the original production configuration.
Refer to: Seatbelt Procedure After a Collision (501-20A Seatbelt Systems, General Procedures).

Child Safety Seat Tether Anchor - Lower Anchors and Tethers for Children (LATCH)

Lower Anchors and Tethers for Children (LATCH) are located at all second row seating positions and only at the outboard seating positions for the third row of seating. They are part of the seat backrest frame and repair should not be attempted, install a new backrest frame.

If a child safety seat was in use during a collision, inspect the LATCH and restore the vehicle to the original production configuration.
Refer to: Seatbelt Procedure After a Collision (501-20A Seatbelt Systems, General Procedures).