Front Seat Backrest
FRONT SEAT BACKRESTSpecial Tool(s):
SPECIAL TOOL(S)
DISASSEMBLY
WARNING:
- Always wear safety glasses when repairing an air bag supplemental restraint system (SRS) vehicle and when handling an air bag module. This will reduce the risk of injury in the event of an accidental deployment.
- Carry a live side air bag module with the air bag and tear seam pointed away from your body. This will reduce the risk of injury in the event of an accidental deployment.
- Do not set a live side air bag module down on the cover tear seam. This will reduce the risk of injury in the event of an accidental deployment.
- After deployment, the air bag surface can contain deposits of sodium hydroxide, a product of the gas generant combustion that is irritating to the skin. Wash your hands with soap and water afterwards.
- Never probe the connectors the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
- Seat side air bag modules with damaged covers must be replaced.
- The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.
NOTE:
- If a seat equipped with a seat mounted side air bag and/or a safety belt pretensioner (if equipped) system is being serviced, the air bag system must be deactivated.
- Restraint system diagnostic tools MUST installed under the seats in the seat side air bag (if equipped) and safety belt pretensioner (if equipped) to floor connectors.
- Diagnostics or repairs are not to be carried out on a seat equipped with a seat side air bag with the seat in the vehicle. Prior to attempting to diagnose or repair a seat concern when equipped with a seat side air bag, the seat must be removed from the vehicle and the restraint system diagnostic tools must be installed in the seat side air bag electrical connectors. The restraint system diagnostic tools must be removed prior to operating the vehicle over the road.
- The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
- If a seat side air bag deployment took place a new seat back pad, trim cover, and side air bag module must be installed. Install a new seat back frame if necessary.
- Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and carry out the diagnostic procedure again.
- When servicing just the seat side air bag module, refer to Air Bag Systems for the side air bag module removal and installation procedure.
- The driver seat back is shown, the passenger seat back is similar.
- A seat with climate control and manual lumbar is shown, all others are similar.
- A low-back seat is shown, the hi-back seat is similar.
1. WARNING: To avoid accidental deployment and possible personal injury, the backup power supply must be depleted before repairing or replacing any front or side air bag supplemental restraint system (SRS) components and before servicing, replacing, adjusting or striking components near the front or side air bag sensors or RCM, such as doors, instrument panel, console, door latches, strikers, seats and hood latches.
The front impact severity sensor is located under the hood latch bracket.
The first row side impact sensors (if equipped) are located under the seat, beneath the carpet.
The second row side impact sensors (if equipped) are located at or near the base of the C-pillar.
To deplete the backup power supply energy, disconnect the battery ground cable and wait at least one minute. Be sure to disconnect auxiliary batteries and power supplies (if equipped).
Disconnect the battery ground cable and wait at least one minute.
2. WARNING: To reduce the risk of serious personal injury, read and follow all warnings, cautions, notes, and instructions in the supplemental restraint system (SRS) deactivation/reactivation procedure.
Deactivate the supplemental restraint system (SRS).
3. WARNING: To reduce the risk of serious personal injury, read and follow all warnings, cautions, notes, and instructions in the seat removal and installation procedure.
Remove the front seat.
4. Remove the front seat backrest.
Part 1:
Part 2:
5. WARNING: Front seat back trim covers installed on seats equipped with side air bags cannot be repaired, they are to be replaced (cleaning is permissible).
NOTE: If installing a new side air bag module, use new retaining nuts. If the same side air bag module is to be reused then reuse the side air bag module nuts.
Disassemble the parts in the order listed in the illustration and table.
To remove individual parts, only carry out the listed steps.
Item 1: Head Restraint Disassembly Note
1. Using a suitable tool, insert in the head restraint sleeve hole and release tab on head restraint sleeve and push the release tab on the other head restraint sleeve and remove the head restraint.
Item 5: Head Restraint Sleeves Disassembly Note
1. Release the J-clip.
2. Reach up in the seat back and pinch the end the head restraint sleeves and remove.
Item 12: Backrest Trim Cover Disassembly Note
1. WARNING: Front seat back trim covers installed on seats equipped with side air bags cannot be repaired, they are to be replaced (cleaning is permissible).
Remove and discard the hog rings. Remove backrest trim cover from the foam pad.
2. CAUTION: Use care when separating the seat back trim cover from the hook and loop strip, or the hook and loop strip could be torn from the seat back foam.
Invert the backrest trim cover in an inside-out fashion to the row of hog rings.
- Placing a hand between the seat backrest trim cover and pad, carefully separate the hook and loop strips.
3. Release the side air bag module deployment chute clip.
4. Remove the two hog rings from lumbar-to-foam pad and remove the backrest foam pad.
Item 16: Seat Side Air Bag Nuts Disassembly Note
1. NOTE:
- When servicing just the seat side air bag module, refer to Air Bag Systems for the side air bag module removal and installation procedure.
- If installing a new seat side air bag module, use new retaining nuts. If the same seat side air bag module is to be reused, reuse the seat side air bag module nuts.
Remove the seat side air bag nuts.
2. WARNING: Do not disconnect the wire connector at the seat side air bag module. This is a permanent connection. Doing so may result in accidental air bag deployment, which may result in personal injury.
Remove the side air bag module with wire harness.
ASSEMBLY
1. WARNING:
- Inspect the mounting surfaces of the side air bag module for any foreign objects before installing the side air bag module. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.
- Inspect the side air bag deployment chute and the side air bag cavity in the seat back pad for any foreign objects. If any foreign objects are found remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.
- Before installing the side air bag module into the deployment chute, check it for damage and foreign objects. If the air bag module is damaged, replace it. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.
- If the air bag cover has separated or the air bag material has been exposed, install a new side air bag module. Do not attempt to repair the air bag module. Failure to do so may result in personal injury, in the event of an air bag deployment.
- Check the side air bag deployment chute for damage. The deployment chute must not be repaired. If there is any damage to the deployment chute, the seat back trim cover and deployment chute must be installed new as a unit.
- If the air bag deployment chute is not properly positioned, the side air bag may not deploy properly.
- Inspect the mounting surfaces of the deployment chute and the seat back frame mounting bracket for any foreign objects, before installing the side air bag module/deployment chute assembly. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.
NOTE: The alignment pin will only allow the side air bag module to be installed to the seat back mounting bracket one way.
To assemble, reverse the disassembly procedure.
2. Install the front seat backrest.
3. WARNING: To reduce the risk of serious personal injury, read and follow all warnings, cautions, notes, and instructions in the seat removal and installation procedure.
NOTE: Make sure the battery negative cable is still disconnected before continuing with the installation portion of this procedure.
Install the front seat.
4. CAUTION:
- There are three occupant classification sensor (OCS) system service kits available for this vehicle (base seat, heated seat and climate controlled seat). Always make sure the correct OCS service kit is installed.
- It is necessary to rezero the OCS system when a front passenger seat cushion is disassembled, a new trim cover installed, a seat side shield removed, or an OCS service kit is installed. A scan tool is used to trigger the active command to carry out rezeroing of the OCS system.
- Make sure the seat is completely assembled before rezeroing.
- The following precautions must be taken before rezeroing the OCS system:
- Make sure the OCS system components are connected and no faults are present.
- Make sure the OCS system is not at a temperature below 0°C (32°F) or above 45°C (113°F) when initiating the rezeroing process. If the vehicle has been exposed to extreme cold or hot temperatures, the vehicle must be exposed and kept at a temperature within the limits, 0°C to 45°C (32°F to 113°F) for a minimum of 30 minutes.
- Make sure nothing is present on the passenger seat before rezeroing and nothing is placed on the seat during the rezeroing process.
- Make sure a minimum eight second time period has passed after cycling the ignition switch ON before the rezeroing process.
NOTE:
- For best results in rezeroing, the OCS system should be at or near room temperature, 10°C to 29°C (50°F to 85°F).
- When using a New Generation STAR (NGS) Tester you must use the appropriate memory card with the latest update to carry out this function. To rezero the OCS system:
- select "SERVICE BAY FUNCTIONS"
- select "RCM"
- select "SYSTEM RESET"
- select the vehicle from the menu
- view the on-screen information, then press "TRIGGER"
The NGS screen will then display "OCS RESET: REZERO." Press "DONE" (button to rezero the OCS system. The NGS will return to the vehicle menu once rezeroing of the OCS system is complete.
NOTE: To rezero the OCS system using the Worldwide Diagnostic System (WDS):
- select the "Toolbox" icon
- select "Body" from the menu
- select "Restraints" from the menu
- select "Seat Weight Sensor ReZero"
After selecting "Seat Weight Sensor ReZero", follow the on-screen prompts to carry out rezeroing of the OCS system.
NOTE: If the first attempt to rezero the OCS system is unsuccessful, a second attempt must be made.
If the passenger seat backrest was removed, rezero the occupant classification sensor.
- With the front passenger seat empty, use scan tool to trigger the active command and rezero the occupant classification sensor.
5. NOTE: The ignition switch must be cycled after rezeroing the OCS system.
If the passenger seat backrest was removed, cycle the ignition switch from ON to OFF.
6. WARNING: To reduce the risk of serious personal injury, read and follow all warnings, cautions, notes, and instructions the supplemental restraint system (SRS) deactivation/reactivation procedure.
Reactivate the supplemental restraint system (SRS).
7. WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from the vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.
With all the restraint system diagnostic tools removed, prove out the supplemental restraint system (SRS).
Item 16: Seat Side Air Bag Nuts Assembly Note
1. WARNING:
- Inspect the mounting surfaces of the side air bag module and the seat back frame mounting bracket for any foreign objects, before installing the side air bag module. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.
- Inspect the side air bag deployment chute and the side air bag cavity in the seat back pad for any foreign objects. If any foreign objects are found remove them. Failure to do so may result in personal injury in the event of an air bag deployment.
- Before installing the side air bag module, check it for damage and foreign objects. If the air bag module is damaged, replace it. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.
- Do not disconnect the wire connector at the seat side air bag module. This is a permanent connection. Doing so may result in accidental air bag deployment, which may result in personal injury.
NOTE: If installing a new seat side air bag module, use new retaining nuts. If the same seat side air bag module is to be reused then reuse the seat side air bag module nuts.
Position the side air bag module onto the front seat backrest frame mounting bracket and install the nuts.
2. Route the side air bag module wire harness to the seat backrest frame.
Item 12: Backrest Trim Cover Assembly Note
1. WARNING: Check the side air bag deployment chute and clips for damage. The deployment chute and clips must not be repaired. If there is any damage to the deployment chute or clips, the seat back trim cover and deployment chute must be installed new as a unit.
Position the deployment chute and clips through the backrest foam pad.
2. WARNING: If the air bag deployment chute is not properly positioned and completely closed, the side air bag may not deploy properly.
Position the air bag deployment chute.
1 Insert the outboard side of the air bag deployment chute between the seat back pad and the side air bag module pulling it around the outboard side of the seat back frame.
2 Insert the inboard side of the air bag deployment chute between the seat back pad and the side air bag module from the inboard side of the seat back.
3. WARNING: If the air bag deployment chute is not properly positioned and completely closed, the side air bag may not deploy properly.
Attach the deployment chute clips and hook and loop strips.
- The side air bag deployment chute must encircle the side air bag module, going completely around the side air bag module and the side of the seat back frame.
- Align the side air bag deployment chute to the side air bag module, making sure it covers the length of the side air bag module, it must not cover the top or the bottom of the side air bag module.
4. WARNING: Front seat back trim covers installed on seats equipped with side air bags cannot be repaired, they are to be replaced (cleaning is permissible).
Install the hog rings.
5. Install the two hog rings on the lumbar-to-foam pad.
6. Roll the seat backrest trim cover down and reattach the lower J-clips.
- Make sure any necessary wire harnesses, connectors or ducts are through the trim cover openings.