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HOMESERVICE MANUALSLINCOLN2009NAVIGATOR L RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 99 (FIRE SUPPRESSION SYSTEM)DESCRIPTION & OPERATIONFIRE SUPPRESSION SYSTEMFIRE SUPPRESSION SYSTEM MODULE (FSSM)
2009 Lincoln Navigator L RWD

Fire Suppression System Module (FSSM)

2009 Lincoln Navigator L RWDSECTION Fire Suppression System Module (FSSM)
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: The tightening torque of the fire suppression system module (FSSM) bolts and the FSSM orientation on the body of the vehicle is critical for correct system operation. Always tighten and orient the FSSM per specifications. Failure to do so may result in incorrect fire suppression system operation, which increases the risk that it will not protect vehicle occupant(s).

The fire suppression system module (FSSM) is mounted underneath the rear seat cushion. The FSSM carries out the following functions:

  • Signals the suppressors to deploy the suppressant material in the event of a deployable crash.
  • Monitors the fire suppression system for faults.
  • Illuminates the fire suppression system indicator if a fault is detected.
  • Receives information from the ABS module.
  • Communicates through the data link connector (DLC) the on-demand or continuous memory DTCs.

The FSSM monitors the fire suppression system for possible faults. If a fault is detected while the ignition switch is in the ON position, the FSSM will illuminate the fire suppression system indicator located in the IC.

When the ignition switch is cycled (turned off and then on), the fire suppression system indicator remains lit for 6 seconds and then goes out. If a fire suppression fault exists, the fire suppression system indicator flashes or remains lit. The FSSM communicates the on-demand and continuous memory DTCs through the DLC, using the scan tool.

The FSSM includes a backup power supply. This feature provides sufficient backup power to deploy the suppressors in the event that the ignition circuit is damaged in a collision before the suppressors deployment is initiated. The backup power supply will deplete its stored energy approximately one minute after the power is removed from the FSSM.

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