Fire Suppression Module (FSM)

FIRE SUPPRESSION MODULE (FSM)

WARNING: The fire suppression module (FSM) orientation is critical for correct system operation. If a vehicle equipped with a fire suppression system has been involved in a collision in which the rear floor panel area has been damaged, inspect the mounting bracket for damage. If the mounting bracket is damaged, a new FSM must be installed whether or not the fire suppressors have deployed. In addition, make sure the area of the FSM mounting area is restored to its original condition.

The fire suppression module (FSM) is mounted underneath the rear seat cushion.The FSM performs 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 anti-lock brake system (ABS) module.
- communicates through the data link connector (DLC) the current or historical diagnostic trouble codes (DTCs).

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

When the ignition switch is cycled (turned off and then on), the fire suppression system indicator remains lit for six seconds and then goes out. If a fire suppression fault exists, the fire suppression system indicator flashes or remains lit. The FSM communicates the current and historical DTCs through the DLC, using the diagnostic tool.

The FSM 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 suppressors deployment is initiated. The backup power supply will deplete its stored energy approximately one minute after the power is removed from the FSM.