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Seat Belt System Chevrolet Corvette C6

Restraints Control Systems 2 illustrations ~2288 words

Fastener Tightening Specifications

ApplicationSpecifications
MetricEnglish
Antenna Ground Bolt5.8 N.m51 lb in
Buckle Side Nut50 N.m37 lb ft
Child Restraint Tether Anchor Plate Bolt27 N.m20 lb ft
Lower Retractor Bolt47 N.m35 lb in
Shoulder Harness Guide Bracket Bolt27 N.m20 lb ft
Upper Guide Bolt (Coupe, Hardtop)41 N.m31 lb ft
Upper Guide Nut (Convertible)40 N.m29 lb ft
Upper Lock Pillar Trim Screw1.8 N.m16 lb in
Upper Retractor Bolt41 N.m31 lb ft

Scheme 1

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

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.

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

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/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__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

Refer to the following symptom diagnostic procedure 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/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) sends the status of the seat belt switch to the instrument panel cluster (IPC) via a class 2 serial data message. If the driver seat belt is unfastened, the SDM will send a message to the IPC to illuminate the fasten safety belt indicator for 72 seconds or until the seat belt is fastened.

Reference Information

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification

Ignition ON, perform the IPC Display Test using the scan tool and verify the driver seat belt indicator is illuminated.

  1. If the indicator does not illuminate, replace the IPC.

Circuit/System Testing

IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector. IPC Seat belt switch Seat belt switch harness connector SDM SDM harness connector
  1. Ignition OFF, disconnect the harness connector at the applicable seat belt switch.
  2. Ignition OFF, test for less than 5 ohm of resistance between the low reference circuit terminal B and ground. If greater than the specified range, test the low reference circuit terminal B for an open/high resistance. If the circuit tests normal, replace the SDM.
  3. Ignition ON, verify the scan tool seat belt switch parameter is Unbuckled. If not the specified value, test the signal circuit terminal A 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 and the low reference circuit terminal B. Verify the scan tool seat belt switch parameter is Buckled. If not the specified value, test the signal circuit terminal A for a short to voltage or open/high resistance. If the circuit tests normal, replace the SDM.
  5. If all circuits test normal, test or replace the applicable seat belt switch.

Component Testing

  1. Ignition OFF, disconnect the harness connector at the left seat belt switch.
  2. Test for infinite resistance between the signal circuit terminal A and the low reference terminal B. If not the specified value, replace the left seat belt switch.
  3. With the seat belt buckled, test for less than 5 ohms of resistance between the signal circuit terminal A and the low reference terminal B. If greater than the specified range, replace the left seat belt switch.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Seat Belt Buckle Pretensioner Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM or IPC replacement, setup, and programming

Seat Belt Service Precautions

  1. Do not bleach or dye the seat belt webbing. Clean only with a mild soap and water solution and a soft brush or cloth.
  2. Keep sharp edges and damaging objects away from the seat belts. Avoid bending or damaging any part of the seat belt buckle or latch plate. Replace any seat belts which are cut or damaged in any way.
  3. Use only the correct seat belt anchor bolts/screws and tighten to the correct torque value. Refer to «Specifications»(/chevrolet/corvette/c6-2004-2014/remont/restraints-control-systems/#seat-belt-system) in this section. When installing seat belt anchor bolts, start the bolt by hand to ensure that the bolt is threaded straight.
  4. Some seat belts and retractors must be serviced as a set with service replacement parts only. Do not attempt to make repairs to the individual components which are only serviced as a set.
  5. 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

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 2

Scheme 2: Seat Belt Latch Stop Installation
Scheme 2: 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.

Removal Procedure

  1. Remove the driver seat. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  2. Remove the intermediate carpet. Refer to «Intermediate Carpet Replacement (Convertible)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) or «Intermediate Carpet Replacement (Coupe)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
  3. Remove the bolts attaching the retractor (1).
  4. Remove the bolt securing the seat belt anchor to the seat.
  5. Remove the retractor (2) assembly from the vehicle.

Installation Procedure

  1. Position the retractor assembly in the vehicle.
  2. Install the retractor (2) and seat belt anchor bolts (1). Tighten: Tighten the bolts to 41 N.m (31 lb ft).
  3. Install the intermeddle carpet. Refer to «Intermediate Carpet Replacement (Convertible)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) or «Intermediate Carpet Replacement (Coupe)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
  4. Install the driver seat. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  1. Remove the driver seat. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  2. Remove the rear trim panel (1). Refer to «Rear Compartment Side Trim Panel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  3. Remove the bolt (2) attaching the retractor.
  4. Remove the retractor assembly from the vehicle.
  1. Position the retractor assembly in the vehicle.
  2. Install the retractor bolt (2). Tighten: Tighten the bolt to 41 N.m (31 lb ft).
  3. Install the rear trim panel (1). Refer to «Rear Compartment Side Trim Panel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  4. Install the driver seat. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  1. Remove the passenger seat assembly. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  2. Remove the intermediate carpet. Refer to «Intermediate Carpet Replacement (Convertible)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) or «Intermediate Carpet Replacement (Coupe)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
  3. Remove the bolts (1) attaching the retractor.
  4. Remove the bolt securing the seat belt anchor to the seat.
  5. Remove the retractor (2) assembly from the vehicle.
  1. Position the retractor assembly in the vehicle.
  2. Install the retractor (2) and seat belt anchor bolts (1). Tighten: Tighten the bolts to 41 N.m (31 lb ft).
  3. Install the intermediate carpet. Refer to «Intermediate Carpet Replacement (Convertible)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) or «Intermediate Carpet Replacement (Coupe)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
  4. Install the drivers seat. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  1. Remove the passenger seat. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  2. Remove the rear trim panel (1). Refer to «Rear Compartment Side Trim Panel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  3. Remove the bolt attaching the retractor (2).
  4. Remove the retractor assembly from the vehicle.
  1. Position the retractor assembly in the vehicle.
  2. Install the retractor bolt (2). Tighten: Tighten the bolt to 41 N.m (31 lb ft).
  3. Install the rear trim panel (1). Refer to «Rear Compartment Side Trim Panel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  4. Install the passenger seat. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .

Child Restraint Belt Tether Location

Lower anchors are provided at the passenger position that can be used to install a child seat. A label on the seatback shows where each lower anchor is installed.

If the child seat has the necessary attachments, the vehicle owner may use these lower anchors to install the child seat instead of using the vehicle safety belts.

However this vehicle is not equipped with a third top anchor. If the instructions that come with the child seat require that 3 anchors be used to secure the seat, do NOT use that seat in this vehicle.

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 seat belts that are the primary means of occupant restraint. Seat belts help to keep the occupant(s) 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 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. Both driver seat belt pretensioner includes a seat belt switch in the seat buckle which controls a reminder lamp and a tone alarm.

  1. When the driver seat belt is buckled, the driver 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 passenger seat belt is buckled with an occupant sitting in the passenger front seat, and the passenger door is closed, then the ignition switch is turned ON, the following events will occur: The tone alarm will not operate. The reminder lamp, which is located within the PPS status indicator for the passenger seat, will not be turned ON.
  3. When the driver seat belt is not buckled, the driver door is closed, 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 for 20 seconds, until the driver seat belt is buckled.
  4. When the passenger seat belt is not buckled with an occupant sitting in the passenger front seat, and the passenger door is closed, then the ignition switch is turned ON, the following events will occur: 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.

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 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.

Fasten Safety Belt Indicator

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 sensing and diagnostic module (SDM) sends the status of the driver seat belt switch to the IPC via a serial data communication 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 serial data communication message requesting 5 chimes to sound.