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Seat Belt System Chevrolet Impala IX

Restraints Control Systems 13 illustrations ~3214 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Child Seat Tether Bracket Screws24 N.m18 lb ft
Front Seat Buckle Side Belt Nut42 N.m31 lb ft
Guide Loop Bolt42 N.m31 lb ft
Rear Seat Center Belt Nuts42 N.m31 lb ft
Seat Belt Buckle Anchor Bolt42 N.m31 lb ft
Seat Belt Buckle Anchor Nut42 N.m31 lb ft
Seat Belt D-Ring Bolt42 N.m31 lb ft
Seat Belt Retractor Anchor Plate Nut42 N.m31 lb ft
Seat Belt Retractor Bolt42 N.m31 lb ft
Shoulder Belt Anchor Plate Bolt42 N.m31 lb ft
Shoulder Belt Guide Adjuster Bracket Bolts42 N.m31 lb ft

Scheme 1

Scheme 1: Seat Belt Wiring Schematics
Scheme 1: Seat Belt Wiring Schematics

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

Perform the following inspection from the driver seat

  1. Turn the ignition switch to the ON position. Verify the 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»(/chevrolet/impala/ix-2006-2016/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. If the seat belt webbing will not retract, refer to «Seat Belt Does Not Retract»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system__seat-belt-does-not-retract) .
  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: Verify that the seat belt latch plate releases easily from the buckle. Verify that the button returns to its original position.

Repeat the inspection procedure found in steps 2-10 for 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.
  5. Push the button on the buckle: Verify that the seat belt latch plate releases easily from the buckle. Verify that the button returns to its original position.

Repeat the inspection procedure found in steps 2-10 for the rear seats.

Repeat the center seat belt inspection procedure found in steps 1-5 for the rear seat.

For information on removal of the rear seats cushions, refer to Rear Seat Cushion Replacement (Impala) .

Emergency Locking Retractors

WARNINGPerform this test in an area clear of other vehicles or obstructions. Do not conduct this test on the open road. A large, empty parking lot is suitable. Failure to observe this precaution may result in damage to the vehicle and possible personal injury.

Scheme 2

Scheme 2
Scheme 2
  1. Fasten the seat belts. Use an assistant 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: Remove the seat belt retractor assembly, refer to the appropriate service procedure. Tilt the seat belt retractor slowly. 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. If the seat belt retractor does not operate as described, replace the retractor assembly. Refer to the appropriate service procedure.

Symptoms - Seat Belts

IMPORTANTReview 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. Refer to «Checking Aftermarket Accessories»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
  2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

  1. Refer to «Seat Belt Indicator Circuit Malfunction - Driver»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system) in order to diagnose the symptom.
  2. Refer to «Seat Belt Indicator Circuit Malfunction - Passenger»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system) in order to diagnose the symptom.

Seat Belt Does Not Retract

  1. Grab the seat belt webbing and slowly and firmly extract 15-25 mm (5/8-1 in) of webbing from the seat belt.
  2. Release the seat belt and allow the webbing to slowly retract back into the retractor.
  3. Check to see if the seat belt is released. If the seat belt is not released, repeat steps 1 and 2, two times more.
  4. If the retractor does not release after repeating the steps, replace with a new retractor.

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Seat Belt Switch Signal12
Low Reference2
Indicator will remain ON with seat belt buckled. Indicator will illuminate only for the bulb test.

Circuit/System Description

The driver seat belt switch is a 2-wire switch wired to the inflatable restraint sensing and diagnostic module (SDM) using a signal circuit and a low reference circuit. When the seat belt is unbuckled the switch is closed, and when the seat belt is buckled the switch is open. The SDM sends the status of the driver seat belt via serial data to the instrument panel cluster (IPC). After receiving the message, the IPC controls the illumination of the driver seat belt indicator.

Reference Information

Schematic Reference

  1. «Seat Belt Schematics»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system)
  2. «SIR Schematics»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

Circuit/System Verification

  1. Ignition ON, with a scan tool perform the IPC Display Test and verify the driver seat belt indicator is illuminated for 5 seconds. If the indicator does not illuminate, replace the IPC.
  2. Monitor the SDM Driver Seat Belt Switch parameter while connecting and disconnecting the seat belt. The parameter should display Buckled and Unbuckled when changing seat belt states.

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the seat belt switch.
  2. Ignition ON, test the resistance between the low reference circuit terminal B and signal circuit terminal A of the switch (buckle side) while connecting and disconnecting the seat belt. The resistance should switch between infinity and less than 2 ohms. If not as specified, replace the seat belt buckle.
  3. Ignition OFF, reconnect the harness connector at the seat belt switch.
  4. Make sure the seat belt is buckled.
  5. Ignition ON, using a scan tool, verify the SDM Driver Seat Belt Switch parameter display is Buckled. If the parameter is Unbuckled, test the seat belt switch signal circuit for a short to ground. If the circuit tests normal replace the SDM.
  6. Make sure the seat belt is unbuckled.
  7. Install a 3-amp fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B (harness side). Verify the SDM Driver Seat Belt Switch parameter display is Unbuckled. If the parameter is Buckled, test the signal and the low reference circuits for open/high resistance or a short to voltage. If the circuits test normal, replace the SDM.
  8. If all circuits test normal, test or replace the seat belt switch.

Component Testing

  1. Ignition OFF, disconnect the harness connector at the seat belt switch.
  2. With the seat belt buckled, test for infinite resistance between the signal circuit terminal A and the low reference terminal B. If not the specified range, replace the seat belt switch.
  3. With the seat belt unbuckled, test for less than 2 ohms of resistance between the signal circuit terminal A and the low reference terminal B. If greater than the specified range, replace the seat belt switch.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Driver or Passenger Seat Belt Buckle Replacement»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system)
  2. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM or IPC replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Low Reference2
Passenger Seat Belt Switch Signal12
Ignition 1 Voltage33
Passenger Seat Belt Indicator Control45
The passenger seat belt indicator will remain ON with seat occupied and the seat belt buckled. The passenger seat belt indicator will not illuminate with the seat occupied and the seat belt disconnected, but will illuminate for the bulb test. No indicator on the inflatable restraint passenger air bag ON/OFF indicator will illuminate at any time. The passenger seat belt indicator will illuminate at all times. The passenger seat belt indicator will never illuminate but the PPS ON/OFF indicator does.

The seat belt buckle switch is a 2-wire switch wired to the inflatable restraint sensing and diagnostic module (SDM) using a signal circuit and a low reference circuit. When the seat belt is unbuckled the switch is closed, and when the seat belt is buckled the switch is open. When the passenger presence system (PPS) indicates that the seat is occupied, the SDM sends the status of the passenger seat belt via serial data to the instrument panel cluster (IPC). After receiving the message, the IPC controls the illumination of the passenger seat belt indicator by grounding the indicator control circuit. If an occupant is seated in the front passenger seat and the seat belt is unfastened, the SDM will send a message to the IPC to illuminate the fasten seat belt indicator for approximately 72 seconds or until the seat belt is fastened.

Schematic Reference

  1. «Seat Belt Schematics»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system)
  2. «SIR Schematics»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

  1. With no weight in the passenger seat observe the passenger seat belt status indicator. Turn ON the ignition, the indicator should illuminate for 5 seconds. If the indicator is always ON or always OFF, refer to Indicator Circuit Test.
  2. Ignition ON, monitor the Passenger Seat Belt Switch parameter while connecting and disconnecting the seat belt. The parameter should display Buckled and Unbuckled when changing seat belt states. If the parameter displays incorrectly, refer to Switch Circuit Test.

Indicator Circuit Test

  1. Ignition OFF, disconnect the harness connector at the passenger air bag ON/OFF indicator.
  2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 4 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test or replace the passenger air bag ON/OFF indicator.
  3. Connect a test lamp between the control circuit terminal 5 and the ignition circuit terminal 4.
  4. With the passenger seat occupied the test lamp should turn ON with the seat belt disconnected, and turn OFF with the seat belt connected. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the IPC. If the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit tests normal, replace the IPC.
  5. If the circuits test normal, replace the passeniger air bag ON/OFF indicator.

Switch Circuit Test

  1. Ignition OFF, disconnect the harness connector at the passenger seat belt switch.
  2. Test the resistance between the low reference circuit terminal B X1 and signal circuit terminal A X1 of the switch (buckle side) while connecting and disconnecting the seat belt. The resistance should switch between infinity and less than 2 ohms. If not as specified, replace the seat belt buckle.
  3. Ignition ON, using a scan tool, verify the Passenger Seat Belt Switch parameter display is Buckled. If the parameter is Unbuckled, test the seat belt switch signal circuit for a short to ground. If the circuit tests normal replace the SDM.
  4. Install a 3-amp fused jumper wire between the signal circuit terminal A X1 and the low reference circuit terminal B X1 (harness side). Verify the scan tool Passenger Seat Belt Switch parameter display is Unbuckled. If the parameter is Buckled, test the signal and the low reference circuits for open/high resistance. If the circuits test normal, replace the SDM.
  1. Ignition OFF, disconnect the harness connector at the seat belt switch.
  2. With the seat belt buckled, test for infinite resistance between the signal circuit terminal A X1 and the low reference terminal B X1 (buckle side). If not the specified range, replace the seat belt switch.
  3. With the seat belt unbuckled, test for less than 2 ohms between the signal circuit terminal A X1 and the low reference terminal B X1. If greater than the specified range, replace the seat belt switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Driver or Passenger Seat Belt Buckle Replacement»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system)
  2. «Inflatable Restraint Instrument Panel Module Indicator Replacement»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  3. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM or IPC replacement, setup, and programming

Repairs and Inspections Required After a Collision

WARNINGRestraint systems can be damaged in a collision. To help avoid injury and ensure that all parts in need of replacement are replaced: Replace any seat belt system that was in use during the collision serious enough to deploy any automatic restraint device such as air bags and seat belt pretensioners. This not only includes seat belt systems in use by people of adult size, but seat belt systems used to secure child restraints, infant carriers and booster seats, including LATCH system and top tether anchorages. Replace any seat belt system that has torn, worn, or damaged components. This not only includes adult seat belt systems, but built-in child restraints and LATCH system components, if any. Replace any seat belt system if you observe the words "REPLACE" or "CAUTION", or if a yellow tag is visible. Do not replace a seat belt if only the child seat caution label is visible. Replace any seat belt system if you are doubtful about its condition. This not only includes adult seat belt systems, but built-in child restraints, LATCH system components, and any restraint system used to secure infant carriers, child restraints, and booster seats. Do NOT replace single seat belt system components in vehicles that have been in a collision as described above. Always replace the entire seat belt system with the buckle, guide and retractor assembly, which includes the latch and webbing material.

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 3

Scheme 3: Seat Belt Latch Stop Installation
Scheme 3: Seat Belt Latch Stop Installation
CalloutComponent Name
Preliminary Procedure Locate the hole in the seat belt webbing where the original seat belt stop button was located. If the original hole in the seat belt webbing is not visible, perform the following: If either the right or left stop button is missing use the opposing seat belt as a reference. With the opposing seat belt fully stowed, measure the distance between the seat belt lower anchor and the stop button. Using the measurement obtained above, measure and mark the location of the missing stop button on the center of the seat belt webbing. Ensure the seat belt latch plate is located above the mark or original hole.
1Seat Belt Stop Button Procedure Work the male half of the stop button through the hole in the webbing or at the marked location. Align the female half of the stop button with the male half of the stop button. Snap the two halves together. Trim off any access of the male half of the stop button flush with the female half of the stop button. Tip: Ensure the male half of the stop button is facing forward in the vehicle in order to ensure the stop button will not snag customers clothing.

Scheme 4

Scheme 4: Driver or Passenger Seat Belt Buckle Replacement
Scheme 4: Driver or Passenger Seat Belt Buckle Replacement
CalloutComponent Name
Preliminary Procedure: Remove the front seat. Refer to Front Seat Replacement - Bucket (Impala) .
1Seat Belt Buckle Bolt CAUTION: Refer to Fastener Caution . Tip: Disconnect the electrical connector. Tighten: 42 N.m (31 lb ft)
2Seat Buckle Assembly Belt
CAUTION
Refer to Fastener Caution .

Scheme 5

Scheme 5: Front Seat Center Buckle Side Belt Replacement
Scheme 5: Front Seat Center Buckle Side Belt Replacement
CalloutComponent Name
1Center Front Seat Trim Plate Tip: Slide the driver seat to the full forward position and adjust the seat back to the full forward position to allow access.
2Seat Belt Buckle Center Front Bolt CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
3Seat Belt Center Front Buckle
CAUTION
Refer to Fastener Caution .

Scheme 6

Scheme 6: Rear Seat Buckle Side Belt Replacement (Impala without AM9)
Scheme 6: Rear Seat Buckle Side Belt Replacement (Impala without AM9)
CalloutComponent Name
Preliminary Procedure: Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement (Impala) .
1Seat Belt Buckle Nut CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
2Seat Buckle Assembly Buckle
CAUTION
Refer to Fastener Caution .

Scheme 7

Scheme 7: Rear Seat Buckle Side Belt Replacement (Impala with AM9)
Scheme 7: Rear Seat Buckle Side Belt Replacement (Impala with AM9)
CalloutComponent Name
Preliminary Procedure: Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement (Impala) .
1Seat Belt Buckle Nut CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
2Seat Buckle Assembly Buckle
CAUTION
Refer to Fastener Caution .

Scheme 8

Scheme 8: Front Seat Center Latch Side Belt Replacement (Impala)
Scheme 8: Front Seat Center Latch Side Belt Replacement (Impala)
CalloutComponent Name
1Center Front Seat Trim Plate Tip: Slide the passenger seat to the full forward position and adjust the seat back to the full forward position to allow access.
2Seat Belt Center Front Bolt CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
3Seat Center Front Belt
CAUTION
Refer to Fastener Caution .

Scheme 9

Scheme 9: Front Seat Belt Guide Adjuster Replacement (Impala)
Scheme 9: Front Seat Belt Guide Adjuster Replacement (Impala)
CalloutComponent Name
Preliminary Procedure: Remove the trim panel, upper center pillar. Refer to Center Pillar Upper Trim Panel Replacement .
1Shoulder Belt Guide Adjuster Cover
2Shoulder Belt Guide Bolt CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
3Shoulder Belt Guide Adjuster Assembly Bolt Tighten: 42 N.m (31 lb ft)
4Shoulder Belt Guide Adjuster Assembly
CAUTION
Refer to Fastener Caution .

Scheme 10

Scheme 10: Rear Seat Belt Retractor Replacement (Impala)
Scheme 10: Rear Seat Belt Retractor Replacement (Impala)
CalloutComponent Name
Preliminary Procedure: Remove the rear window shelf trim panel. Refer to Rear Window Shelf Trim Panel Replacement .
1Seat Shoulder Belt Retractor Bolt CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
2Seat Shoulder Belt Bolt Tighten: 42 N.m (31 lb ft)
3Seat Shoulder Belt Retractor
CAUTION
Refer to Fastener Caution .

Scheme 11

Scheme 11: Rear Seat Center Retractor Side Belt Replacement (Impala with AM9)
Scheme 11: Rear Seat Center Retractor Side Belt Replacement (Impala with AM9)
CalloutComponent Name
Preliminary Procedure: Remove the rear window shelf trim panel. Refer to Rear Window Shelf Trim Panel Replacement .
1Seat Shoulder Belt Retractor Center Nut CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
2Rear Seat Right Buckle
3Seat Shoulder Belt Center Retractor
4Seat Shoulder Belt Retractor Center Bolt Tighten: 42 N.m (31 lb ft)
CAUTION
Refer to Fastener Caution .

Scheme 12

Scheme 12: Rear Seat Center Retractor Side Belt Replacement (Impala without AM9)
Scheme 12: Rear Seat Center Retractor Side Belt Replacement (Impala without AM9)
CalloutComponent Name
Preliminary Procedure Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement (Impala) . Remove the rear seat back. Refer to Rear Seat Back Cushion Replacement (Impala) . Remove the rear window shelf trim panel. Refer to Rear Window Shelf Trim Panel Replacement .
1Seat Belt Retractor Bolt CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
2Seat Shoulder Belt Anchor Plate Bolt Tighten: 42 N.m (31 lb ft)
3Rear Shoulder Seat Belt Retractor
CAUTION
Refer to Fastener Caution .

Scheme 13

Scheme 13: Child Restraint Tether Anchor Replacement (Impala)
Scheme 13: Child Restraint Tether Anchor Replacement (Impala)
CalloutComponent Name
Preliminary Procedure: Remove the trim panel, rear window shelf. Refer to Rear Window Shelf Trim Panel Replacement .
1Child Seat Restraint System Bracket Bolt CAUTION: Refer to Fastener Caution . Tighten: 24 N.m (18 lb ft)
2Child Seat Restraint System Bracket
CAUTION
Refer to Fastener Caution .

Restraint System

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

Vehicle has front and rear seat belts that are the primary means of occupant restraint. Seat belts help to keep the occupants inside the passenger compartment and to gradually reduce the impact forces during the following events

  1. Frontal impact type crashes
  2. Rear impact type crashes
  3. Side impact type crashes
  4. Roll-over type crashes

All seat belt retractors have emergency locks. The retractors remain unlocked during normal operation and under normal driving conditions. The retractors remain unlocked during normal conditions in order to allow free movement of the upper body of each occupant. A pendulum locks the seat belt webbing into position. The pendulum causes a locking bar to engage a cog on the spool of the retractor mechanism when any of the following conditions occur

  1. A rapid extraction of the seat belt webbing from the retractor
  2. An abrupt change in vehicle speed
  3. An abrupt change in vehicle direction
  4. Operation of the vehicle on a steep upgrade
  5. Operation of the vehicle on a downgrade

The seat belts have an automatic locking (cinch) feature. The cinch feature is activated when the seat belt webbing is completely extended from the retractor. The cinch feature prevents the webbing from extending beyond the position from which it is allowed to retract. Use of the cinch feature is recommended for securing a child seat. The cinch feature may be cancelled by allowing the webbing to wind back completely into the retractor. After the cinch feature is cancelled, the webbing is unlocked. After the cinch feature is cancelled, the webbing will extend from the retractor. This vehicle is also equipped with a supplemental inflatable restraint (SIR) system. Refer to SIR System Description and Operation .

The front seat belt system includes a driver and passenger seat belt pretensioner retractor. For more information on the pretensioner retractor refer to SIR System Description and Operation . Both front seat belts includes a seat belt switch in the seat buckle which is monitored by the inflatable restraint sensing and diagnostic module (SDM) for control of a reminder lamp and a tone alarm.

  1. When the driver and passenger seat belts are buckled, and the ignition switch is turned ON, the instrument cluster will illuminate the driver and passenger seat belt indicators for a bulb check for several seconds, then turn OFF.
  2. When the driver seat belt is not buckled, and the ignition switch is in the ON position, the following events will occur: The tone alarm will operate for 4-8 seconds and then go OFF. The fasten safety belt indicator will turn ON solid for 20 seconds, then flash for 55 seconds before turning OFF. The tone alarm and indicator will immediately turn OFF when the driver seat belt is buckled.
  3. When the passenger seat belt is not buckled with an occupant sitting in the passenger front seat, and the ignition switch is turned ON, the following events will occur after a delay of approximately 25 seconds: The tone alarm will operate for 4-8 seconds and then go OFF. The reminder lamp, which is located within the PPS status indicator for the passenger seat, will be turned ON solid for 20 seconds, then flash for 55 seconds before turning OFF. The tone alarm and indicator will immediately turn OFF when the passenger seat belt is buckled.

The Rear Seat Belt System includes the following components

  1. The rear seat belt retractor is located at the wheelhouse panel and attached to the floor panel by the rear seat shoulder belt retractor bracket.
  2. The rear seat belt buckles and the center seat belt are attached to floor panel.

Child Seat Restraint System

WARNINGA child in a rear-facing child restraint can be seriously injured if the right-front passengers air bag inflates. This is because the back of a rear-facing child restraint would be very close to the inflating air bag. NEVER use a rear-facing child restraint in this vehicle. If a forward-facing child restraint is suitable for your child, ALWAYS move the front passenger seat as far back as it will go and then install the child restraint. Be sure the child restraint position does not conflict with any additional requirements provided by the manufacturer. For more information, refer to the vehicle owners manual and the instruction that came with the child restraint.

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.

Fasten Safety Belt Indicators

There are 2 fasten safety belt indicators for this vehicle. The driver fasten safety belt reminder is located on the instrument panel cluster (IPC) and the passenger fasten safety belt reminder is located in the PASSENGER AIR BAG ON/OFF status indicator. The fasten safety belt indicator is only illuminated with the ignition in the RUN position. The IPC illuminates the fasten safety belt indicator under the following condition

After a bulb check the SDM controls both indicators by using a serial data communications message to request illumination. If either seat belt is unfastened, (passenger indicator will only illuminate after an approximate 25 second delay, and only if an occupant is seated in the front passenger seat), the SDM will illuminate the appropriate fasten safety belt indicator for 20 seconds of solid illumination and then 55 seconds of flashing illumination before turning OFF or immediately turn OFF when the seat belt is fastened. If the driver seat belt is unfastened within 8 seconds following a key transition to RUN the SDM sends a message requesting 5 chimes to sound. When the enhanced reminder function is enabled the illumination and chime sequence will repeat after approximately 30 seconds and then again after 3 minutes if the seat belt remains unfastened and vehicle speed is greater than 5 mph.