Supplemental Restraints System Deactivation and Reactivation
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATIONSpecial Tool(s):
SPECIAL TOOL(S)
DEACTIVATION
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 air bag module with the air bag and trim cover pointed away from your body. This will reduce the risk of injury in the event of an accidental deployment.
- Do not set a live air bag module down with the trim cover face down. 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 on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
- Never probe the connectors on the safety canopy module. Doing so can result in safety canopy module deployment.
- Vehicle sensor orientation is critical for proper system operation. If a vehicle equipped with an air bag supplemental restraint system (SRS) is involved in a collision, inspect the sensor mounting bracket and wiring pigtail for deformation. Replace and properly position the sensor or any other damaged supplemental restraint system (SRS) components whether or not the air bag is deployed.
- Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools 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.
- There is currently no restraint system diagnostic tool for the safety belt buckle pretensioner under the seat connectors. If the ignition switch is turned to the ON or START position with the safety belt buckle pretensioner electrical connector(s) disconnected, the DTC and flagged faults for an open circuit will be activated.
- After diagnosing or repairing an SRS, the restraint system diagnostic tools must be removed before operating the vehicle over the road.
- After diagnosing or repairing a seat system, the restraint system diagnostic tools must be removed before operating the vehicle over the road.
- The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
All vehicles
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, such as doors, instrument panel, console, door latches, strikers, seats and hood latches.
The front impact severity sensor is located at the bottom of the hood latch support bracket.
The first row side impact sensors (if equipped) are located in the first row doors, behind the door trim panel.
The second row side impact sensors (if equipped) are located at or near the base of the C-pillars.
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. Remove the two steering wheel back cover plugs (one shown).
3. Remove the two driver air bag module bolts (one shown).
Expedition vehicles
4. Remove the driver air bag module.
1 Release the two retaining tabs. Disconnect the driver air bag module electrical connector.
- Label the driver air bag module squib number on the driver air bag module electrical connector before disconnecting.
2 Release the two retaining tabs. Disconnect the driver air bag module electrical connector.
- Label the driver air bag module squib number on the driver air bag module electrical connector before disconnecting.
3 Disconnect the horn switch electrical connector.
4 Remove the driver air bag module.
Navigator vehicles
5. Disconnect the driver air bag module
- Release the two tabs on each driver air bag module electrical connector and disconnect them.
- Label each driver air bag module electrical connector before disconnecting.
6. Release the tab and disconnect the driver air bag module accessories electrical connector at the top of the clockspring and remove the driver air bag module.
All vehicles
7. Attach the restraint system diagnostic tools to the clockspring electrical connectors at the top of the steering column.
8. While pushing in on the two glove compartment door tabs, position the glove compartment downward.
9. NOTE: The Expedition is shown, the Navigator is similar.
Through the glove compartment opening, release the tab and disconnect the passenger air bag module electrical connector.
10. Attach the restraint system diagnostic tool to the vehicle harness side of the passenger air bag module electrical connector.
Vehicles without safety canopies
11. CAUTION: Do not deactivate the safety canopy module circuit by removing the safety canopy bridge resistor from the safety canopy electrical connector.
If the safety canopy bridge resistor is removed, an open circuit fault will be generated by the restraints control module (RCM).
If a restraint system diagnostic tool is installed at the safety canopy electrical connector, a low resistance fault will be generated by the RCM.
Vehicles with safety canopies
12. NOTE: Inspect the shoulder safety belt guide cover for damage. If the shoulder safety belt guide cover is damaged or if it does not remain closed, install a new shoulder safety belt guide cover.
Remove the second row passenger side safety belt guide.
1 Release the retaining tab at each side and open the safety belt guide cover.
2 Remove the nut.
3 Remove the second row passenger side safety belt guide.
13. Remove the passenger side C-pillar trim panel.
1 Separate the weather-stripping along the passenger side C-pillar trim panel.
2 Remove the bolt cover and bolt.
3 Pull out to release the retainers and remove the passenger side C-pillar trim panel.
14. Disconnect the passenger side safety canopy electrical connector.
15. Attach the restraint system diagnostic tool to the vehicle harness side of the passenger side safety canopy electrical connector.
16. NOTE: Inspect the shoulder safety belt guide cover for damage. If the shoulder safety belt guide cover is damaged or if it does not remain closed, install a new shoulder safety belt guide cover.
Remove the second row driver side safety belt guide.
1 Release the retaining tab at each side and open the safety belt guide cover.
2 Remove the nut.
3 Remove the second row driver side safety belt guide.
17. Remove the driver side C-pillar trim panel.
1 Separate the weather-stripping along the driver side C-pillar trim panel.
2 Remove the bolt cover and bolt.
3 Pull out to release the retainers and remove the driver side C-pillar trim panel.
18. Disconnect the driver side safety canopy electrical connector.
19. Attach the restraint system diagnostic tool to the vehicle harness side of the driver side safety canopy electrical connector.
All vehicles
20. Connect the battery ground cable.
21. With the restraint system diagnostic tools installed at all deployable devices, prove out the supplemental restraint system (SRS).
22. Disconnect the battery ground cable and wait at least one minute.
REACTIVATION
WARNING: To reduce the risk of serious personal injury, read and follow all warnings, cautions, and notes at the beginning of the deactivation procedure.
Vehicles with safety canopies
1. Remove the restraint system diagnostic tool from the vehicle harness side of the driver side safety canopy electrical connector.
2. Connect the driver side safety canopy electrical connector.
3. WARNING: Anytime the safety canopy module has deployed, the headliner, and all A, B, and C pillar upper trim panels and attaching hardware must be replaced along with any other damaged components and hardware. Failure to do so may result in personal injury in the event of a safety canopy module deployment.
Install the driver side C-pillar trim panel.
1 Position the driver side C-pillar trim panel and push in, engaging the retainers.
2 Install the bolt and bolt cover.
3 Install the weather-stripping along the driver side C-pillar trim panel.
4. NOTE:
- Inspect the shoulder safety belt guide cover for damage. If the shoulder safety belt guide cover is damaged or if it does not remain closed, install a new shoulder safety belt guide cover.
- Make sure the safety belt is not twisted prior to installation.
Install the second row driver side safety belt guide.
1 Position the second row driver side safety belt guide.
2 Install the nut.
3 Close the safety belt guide cover.
5. Remove the restraint system diagnostic tool from the vehicle harness side of the passenger side safety canopy electrical connector.
6. Connect the passenger side safety canopy electrical connector.
7. WARNING: Anytime the safety canopy module has deployed, the headliner, and all A, B, and C pillar upper trim panels and attaching hardware must be replaced along with any other damaged components and hardware. Failure to do so may result in personal injury in the event of a safety canopy module deployment.
Install the passenger C-pillar trim panel.
1 Position the passenger side C-pillar trim panel and push in, engaging the retainers.
2 Install the bolt and bolt cover.
3 Install the weather-stripping along the passenger side C-pillar trim panel.
8. NOTE:
- Inspect the shoulder safety belt guide cover for damage. If the shoulder safety belt guide cover is damaged or if it does not remain closed, install a new shoulder safety belt guide cover.
- Make sure the safety belt is not twisted prior to installation.
Install the second row passenger side safety belt guide.
1 Position the second row passenger side safety belt guide.
2 Install the nut.
3 Close the safety belt guide cover.
All vehicles
9. Remove the restraint system diagnostic tool from the vehicle harness side of the passenger air bag module electrical connector.
10. NOTE: The Expedition is shown, the Navigator is similar.
Connect the passenger air bag module electrical connector.
11. Close the glove compartment.
12. Remove the restraint system diagnostic tools from the clockspring electrical connector at the top of the steering column.
Navigator vehicles
13. Connect the driver air bag module accessories electrical connector to the connector end at the top of the clockspring.
14. CAUTION: The clockspring electrical connectors are unique and cannot be reversed when connected to the driver air bag module. Match the electrical connector key to the keyway in the driver air bag module. Do not force the electrical connectors into the driver air bag module.
Connect the driver air bag module electrical connectors as noted during removal.
- Position the driver air bag module to the steering wheel.
Expedition vehicles
15. Position the driver air bag module to the steering wheel.
1 Connect the horn switch electrical connector.
2 CAUTION: The clockspring electrical connectors are unique and cannot be reversed when connected to the driver air bag module. Match the electrical connector key to the keyway in the driver air bag module. Do not force the electrical connectors into the driver air bag module.
Connect the driver air bag module electrical connectors as noted during removal.
3 Position the driver air bag module to the steering wheel.
All vehicles
16. Install the two driver air bag module bolts (one shown).
17. Install the two steering wheel back cover plugs (one shown).
18. Connect the battery ground cable.
19. WARNING: Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools 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).
Vehicles with safety canopies
20. Check the active restraint system for correct operation.