Seat Belt System Buick LeSabre VIII

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 1

Seat Belt Schematics

See SUPPLEMENTAL RESTRAINTS .

Scheme 2

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Diagnostic Starting Point-Seat Belts

Begin the system diagnosis by reviewing the Seat Belt System Description and Operation . Reviewing the description and operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the description and operation information will also help you determine if the condition described by the customer is normal operation.

Symptoms-Seat Belts in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Operational and Functional Checks

Perform the following inspection from the driver seat

1. Turn the ignition switch to the ON position. Verify proper operation of the seat belt reminder lamp with the belt buckled and with the belt unbuckled. Refer to «Seat Belt System Description and Operation»(/buick/lesabre/viii-2000-2005/remont/restraints-control-systems/#seat-belt-system) .
2. Inspect the shoulder belt guide in order to ensure that the following conditions are met: The shoulder belt guide swivels freely. The seat belt webbing is seated flatly in the guide slot. The seat belt webbing does not bind.
3. Verify that the seat belt buckle faces inboard and is accessible.
4. Verify that the seat belt retractor units are securely attached.
5. Verify that the seat belt anchor bolts are secure.
6. Fully extend the seat belt webbing. Verify that the seat belt webbing does not have any twists or tears.
7. Allow the seat belt webbing to retract. Verify that the seat belt webbing returns freely and completely back into the retractor.
8. Snap the seat belt latch plate into the buckle.
9. Sharply tug on the seat belt latch plate and the buckle. Verify that the seat belt latch plate and the buckle remain locked when tugged.
10. Push the button on the buckle. 10.1. Verify that the seat belt latch plate releases easily from the buckle. 10.2. Verify that the button returns to its original position.

Repeat the inspection procedure, steps 2 - 10 , from the front passenger seat.

Perform the following steps in order to inspect the center seat belts

1. Verify that the center seat belts are accessible.
2. Verify that the center seat belts have no twists or tears in the webbing.
3. Snap the center seat belt latch plate into the buckle.
4. Sharply tug on the seat belt latch plate and the buckle. Verify that the seat belt latch plate and the buckle remain locked when tugged. 4.1. Push the button on the buckle. 4.2. Verify that the seat belt latch plate releases easily from the buckle. 4.3. Verify that the button returns to its original position. Repeat the inspection procedure, steps 2 - 10 , from the rear seats. Repeat the center seat belt inspection procedure, steps 1 - 4 , from the rear seat. For information on removal of the rear seats cushions refer to SEAT CUSHION REPLACEMENT - REAR in Seats .

Emergency Locking Retractors

Scheme 4

1. Fasten the seat belts, an assistant is needed when the retractor under test is not part of the driver seat belt.
2. Accelerate the vehicle slowly to 16 km/h (10 mph) and apply the brakes firmly.
3. Verify that the seat belt locks when braking firmly.
4. If the belt does not lock, proceed with the following steps. 4.1. Remove the seat belt retractor assembly. 4.2. Tilt the seat belt retractor slowly. 4.3. Ensure that the seat belt webbing can be pulled from the retractor at an inclination of 15 degrees or less and cannot be pulled from the retractor at an inclination of 45 degrees or more. 4.4. If the seat belt retractor does not operate as described, replace the retractor assembly. Refer to the following procedures: «Seat Belt Replacement-Front»(/buick/lesabre/viii-2000-2005/remont/restraints-control-systems/#seat-belt-system) «Seat Belt Replacement-Rear»(/buick/lesabre/viii-2000-2005/remont/restraints-control-systems/#seat-belt-system) «Seat Belt Replacement-Center Front»(/buick/lesabre/viii-2000-2005/remont/restraints-control-systems/#seat-belt-system)

Symptoms-Seat Belts

Note. Review the seat belt system description and operation in order to familiarize yourself with the system and how it functions. Refer to Seat Belt System Description and Operation .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the seat belt system.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

See TESTING FOR INTERMITTENT AND POOR CONNECTIONS .

Symptom List

Refer to the following symptom diagnostic procedure in order to diagnose the symptom, Seat Belt Indicator Circuit Malfunction .

Scheme 5

Seat Belt Service Precautions

Note. If the vehicle has been in a collision, refer to Repairs and Inspections Required After a Collision for additional information.

1. Do not bleach or dye the seat belt webbing. Use only the following items in order to clean the seat belt webbing: A mild soap and water solution A soft brush or cloth Keep sharp edges and damaging objects away from the seat belts. Do not bend or damage any part of the seat belt buckle or latch plate. Replace any seat belts that are cut or damaged in any manner. Use only the correct seat belt anchor bolts. Tighten the correct seat belt anchor bolt/screw to the correct torque value. Refer to «Fastener Tightening Specifications»(/buick/lesabre/viii-2000-2005/remont/restraints-control-systems/#seat-belt-system__fastener-tightening-specifications) . Begin tightening the seat belt anchor bolts by hand in order to ensure that the bolt is threaded straight. Some seat belts and retractors require service as a set with service replacement components only. DO NOT repair individual components that require service as a set. Verify that the replacement part number is correct for the vehicle at that seating position. DO NOT substitute a seat belt from a different seating position.

Repairs and Inspections Required After a Collision

After a minor collision where no automatic restraint device was deployed, seat belt system replacement may not be necessary, unless some of the parts are torn, worn, or damaged.

Scheme 6

1. Remove the seat adjuster track trim cover. Refer to SEAT ADJUSTER TRACK COVER REPLACEMENT-FRONT in Seats .
2. Note the seat buckle wire routing for installation.
3. Disconnect the electrical connector on the drivers buckle.
4. Remove the fastener.
5. Remove the buckle assembly.

Scheme 7

1. Install the buckle assembly.
2. Install the fastener. Tighten: Tighten the fastener to 26 N.m (19 ft lbs)
3. Route the wire as noted in the removal procedure.
4. Connect the electrical connector to the drivers seat.
5. Install the seat adjuster track trim cover. Refer to SEAT ADJUSTER TRACK COVER REPLACEMENT-FRONT in Seats .

Scheme 8

1. Remove the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in Seats .
2. Remove the rear seat belt and buckle anchor fastener.
3. Slide the rear seat buckle anchor plate out from under the rear seat back hold-down.
4. Remove the rear seat buckle.

Scheme 9

1. Install the rear seat belt buckle anchor plate under the rear seat back hold-down. NOTE: Assure that the fastener threads and fastener hole are free of any sealer patch material.
2. Install the rear seat center belt and RH rear seat buckle anchor fastener. Ensure the center belt anchor is facing rearward and the center buckle anchors are facing towards the rear. Tighten: Tighten the rear seat center belt and rear seat buckle anchor fasteners to 41 N.m (32 ft lbs).
3. Ensure the seat belt buckles are stowed in the seat back pockets and install the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS .

Removal Procedure

Scheme 10

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Scheme 12

1. Remove the seat belt tower rear trim cover.
2. Remove the tower front trim cover fasteners (1).
3. Partially remove the seat back cover, in order to expose the shoulder retractor fastener. Refer to SEAT BACK COVER REPLACEMENT in SEATS .
4. Remove the shoulder retractor fastener.
5. Pull the seat cushion aside in order to gain access to the lap retractor. Remove the lap retractor screws and the cover.
6. Remove the lap retractor fastener and pull out the lap retractor.
7. Remove the lap retractor by pulling out the retractor.

Scheme 13

Scheme 14

Scheme 15

1. Install the lap retractor over the stud. Align the tab on the retractor with the notch in the seat frame.
2. Install the lap retractor fastener. Tighten: Tighten the fastener to 35 N.m (26 ft lbs)
3. Install the lap belt retractor cover.
4. Install the shoulder belt retractor.
5. Install the shoulder belt retractor fastener. Tighten: Tighten the fasteners to 35 N.m (26 ft lbs)
6. Install the tower front trim cover fasteners (1).
7. Install the seat back cover. Refer to SEAT BACK COVER REPLACEMENT in SEATS .
8. Install the seat belt tower rear cover.

Scheme 16

1. Remove the seat assembly. See SEAT REPLACEMENT in SEATS . NOTE: The center belt assembly is riveted to the front seat adjusting rail for in-plant assembly and the rivet does not need to be replaced.
2. Drill out the rivet (1).
3. Remove the center belt assembly.

Scheme 17

1. Install the center belt assembly to the seat assembly adjuster rail. The rivet (1) was installed for location purposes during production assembly and does not need to be reinstalled. However, if replaced seat installation difficulty may be reduced. CAUTION: Make sure the anchor bolt is through the seat adjuster track and center belt holes. Failure to do so could result in system failure, leading to injury in the event of a collision.
2. Install the seat assembly into the vehicle. See SEAT REPLACEMENT in SEATS .

Scheme 18

1. Remove the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS .
2. Remove the rear shelf trim panel. Refer to TRIM PANEL REPLACEMENT-REAR WINDOW SHELF in Exterior/Interior Trim .
3. Remove the rear seat belt retractor. Refer to «Seat Belt Retractor Replacement-Rear»(/buick/lesabre/viii-2000-2005/remont/restraints-control-systems/#seat-belt-system) .
4. Remove the rear seat belt anchor fastener from the floor.

Scheme 19

1. Install the rear seat belt retractor. Refer to «Seat Belt Retractor Replacement-Rear»(/buick/lesabre/viii-2000-2005/remont/restraints-control-systems/#seat-belt-system)
2. Install the rear seat belt anchor fastener to the floor. Tighten: Tighten the anchor fastener to 41 N.m (30 ft lbs)
3. Install the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS .
4. Install the rear shelf trim panel. Refer to TRIM PANEL REPLACEMENT-REAR WINDOW SHELF in Exterior/Interior Trim .

Scheme 20

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Scheme 22

Scheme 23

1. Remove the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS .
2. Remove the center rear seat belt anchor fastener from the floor.
3. Remove the rear seat back. Refer to SEAT BACK REPLACEMENT-REAR in Seats .
4. Remove the push-in retainers securing the rear shelf trim (1).
5. Release the center shoulder belt escutcheon by prying upward on the front corner.
6. Carefully lift up-ward on the rear shelf trim enough to expose the retractor fastener (2).
7. Remove the fastener (2).
8. Remove the front rear compartment trim panel.
9. Remove the retractor through the rear compartment.
10. Feed the center shoulder belt and escutcheon through the opening in the rear shelf trim panel.

Scheme 24

Scheme 25

Scheme 26

1. From the rear compartment, feed the rear seat center shoulder belt and escutcheon through opening in the rear shelf trim panel.
2. Install the retractor to the cross brace.
3. Carefully lift upward on the rear shelf trim panel.
4. From inside the vehicle, install the center rear seat belt retractor fastener (2). Tighten: Tighten the center rear seat belt retractor fastener (2) to 41 N.m (30 ft lbs)
5. Install the push-in fastener in order to secure the rear shelf trim panel.
6. Install the center rear seat belt escutcheon to the rear shelf opening.
7. Install the rear seat back. Refer to SEAT BACK REPLACEMENT-REAR in Seats .
8. Install the center rear seat belt anchor fastener to the floor. Tighten: Tighten the anchor fastener to 41 N.m (30 ft lbs)
9. Install the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS .

Scheme 27

Scheme 28

1. Remove the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS .
2. Remove the rear seat back. Refer to SEAT BACK REPLACEMENT-REAR in Seats .
3. Remove the rear shelf trim panel. Refer to TRIM PANEL REPLACEMENT-REAR WINDOW SHELF in Exterior/Interior Trim .
4. Remove the rear seat back shoulder retractor.
5. Remove the rear seat shoulder belt anchor fastener.
6. Remove the rear seat shoulder belt and retractor.

Scheme 29

Scheme 30

1. Install the rear seat shoulder belt retractor.
2. Install the rear seat shoulder belt retractor fastener. Tighten: Tighten the rear seat shoulder belt retractor fastener to 41 N.m (30 ft lbs)
3. Verify that the belt is not twisted.
4. Align the anchor plate between the dimples in the floor pan with the plate facing forward.
5. Install the anchor fastener. Tighten Tighten the rear seat outer lower fastener to 41 N.m (32 ft lbs)
6. Install the rear shelf trim panel. Refer to TRIM PANEL REPLACEMENT-REAR WINDOW SHELF in Exterior/Interior Trim .
7. Install the rear seat back. Refer to SEAT BACK REPLACEMENT-REAR in Seats .
8. Install the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS .

Scheme 31

Scheme 32

Scheme 33

1. Remove the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS .
2. Remove the rear shelf trim panel. Refer to TRIM PANEL REPLACEMENT-REAR WINDOW SHELF in Exterior/Interior Trim .
3. Remove the rear seat center belt anchor fastener.
4. Disengage the center belt escutcheon from the rear shelf panel.
5. Flip the rear seat center belt up on the rear shelf panel to expose the retractor anchor fastener.
6. Remove the rear seat center belt retractor anchor fastener.

Scheme 34

Scheme 35

Scheme 36

1. Install the rear seat center retractor on to the cross car beam. Ensure the retainer tab engages the notch in the beam.
2. From the rear compartment, feed the rear seat center belt anchor plate and belt through opening in the rear shelf panel. (Scheme 33)
3. From inside the vehicle, install the rear seat center shoulder retractor fastener. Tighten: Tighten the rear seat center shoulder retractor fastener to 30 N.m (22 ft lbs)
4. Install the rear seat center belt escutcheon to the rear shelf opening. NOTE: Ensure that the fastener threads and fastener hole are free of any sealer patch material, and that the belt is not twisted.
5. Install the rear seat center belt lower fastener. Ensure the belt anchor is facing forward. Tighten: Tighten the rear seat center belt lower fastener to 41 N.m (30 ft lbs)
6. Install the rear shelf trim panel. Refer to TRIM PANEL REPLACEMENT-REAR WINDOW SHELF in Exterior/Interior Trim.
7. Ensure the seat belt buckles are stowed in the seat back pockets and install the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS.

Scheme 37

Scheme 38

1. Remove the rear seat back. Refer to SEAT BACK REPLACEMENT-REAR in SEATS .
2. Remove the outer seat belt anchor bolts.
3. Position the lower portion of the rear seat back sound barrier out of the way.
4. Remove the nuts (2) securing the bracket (1) to the vehicle.
5. Remove the bracket (1) from the vehicle in Seats.

Scheme 39

Scheme 40

1. Position the bracket (1) to the vehicle.
2. Install the nuts (2). Tighten: Tighten the nuts to 41 N.m (30 ft lbs)
3. Reposition the rear seat sound barrier to its original position.
4. Install the outer seat belt anchor bolts. Tighten Tighten the bolts to 41 N.m (30 ft lbs)
5. Install the rear seat back. Refer to SEAR BACK REPLACEMENT-REAR in SEATS

Scheme 41

1. Remove the rear shelf trim panel. Refer to TRIM PANEL REPLACEMENT-REAR WINDOW SHELF in EXTERIOR/INTERIOR TRIM .
2. Remove the fasteners from the child tether anchors.
3. Remove the child tether anchors from the vehicle.

Scheme 42

1. Install the child tether anchors to the vehicle.
2. Install the child tether anchor fasteners. Tighten: Tighten the fastener to 30 N.m (22 ft lbs)
3. Install the rear shelf trim panel. Refer to TRIM PANEL REPLACEMENT-REAR WINDOW SHELF in EXTERIOR/INTERIOR TRIM .

The front seat belt system includes a driver and/or passenger seat belt retractor and buckle.

The driver's seat belt system, includes a seat belt switch in the driver seat buckle which controls a reminder lamp and a tone alarm.

1. When the driver seat belt is buckled, the driver's door is closed, and the ignition switch is turned ON, the following events will occur: The tone alarm will not operate. The reminder lamp will not operate.
2. When the driver's seat belt is not buckled, the driver's door is closed, and the ignition switch is in ON position, the following events will occur: The tone alarm will operate for 4 to 8 seconds and then go OFF. The reminder lamp will operate for 20 seconds, until the driver seat belt is buckled.

The rear seat belt system includes the following components

1. The rear seat belt retractor is located under the rear shelf trim panel and is attached to the rear shelf body panel.
2. The center rear seat belt buckle and the outer seat belt buckle are located in the center of the seat cushion and they are attached to the rear floor pan.

Child Seat Restraint System

The child seat may only be used in a forward facing seating location. The child seat should be installed and secured according to the manufacturer's directions. If the child seat has a top strap, the seat will need to be anchored. Passengers should not be allowed to sit at locations where the seat belts are being used to secure the child seat.

All vehicles are equipped with a dual-mode type retractor with emergency and automatic locking features. The automatic locking feature is for restraint of a child seat. The child seat can be secured by pulling the seat belt all the way out to lock it. Then, tighten the seat belt around the child seat.

If a child seat is to be used in the second seat position, a special dealer-installed anchor must be used in order to anchor the child seat top strap. (This only applies to the seats designed with the top strap provision and for the vehicles sold in Canada). In order to ensure the correct top strap angle, the child seat is only to be used at the seating position for which the top strap anchor is installed.

The inflatable restraint Sensing And Diagnostic Module (SDM) receives a discrete input from the left front seat belt switch. The left front seat belt switch is closed when the seat belt is unbuckled.

Fasten Safety Belt Indicator (ISO Symbol) (Red)

The fasten safety belt indicator may only be ON during RUN. The Instrument Panel Cluster (IPC) illuminates the fasten safety belt indicator under the following conditions

1. During the bulb check.
2. The inflatable restraint Sensing And Diagnostic Module (SDM) sends the status of the driver's seat belt switch to the IPC via a class 2 message. If the seat belt is unfastened, the IPC will illuminate the fasten safety belt indicator for 72 seconds or until the seat belt is fastened. If the seat belt is unfastened within 8 seconds following the bulb check, the IPC sends a class 2 serial message requesting 5 chimes to sound.

See also:
• TESTING FOR INTERMITTENT AND POOR CONNECTIONS
• AIR BAG SAFETY PRECAUTIONS
• Seat Belt System Description and Operation
• Symptoms-Seat Belts
• Repairs and Inspections Required After a Collision
• Fastener Tightening Specifications