Normal Operation
WARNING: This page is about a different car, the 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The fire suppression module (FSM) checks the fire suppression manual switch circuits for faults. If the FSM detects an open or a short to ground on circuit 2315 (BK/PK), it stores diagnostic trouble code (DTC) B29AF in memory and illuminates the fire suppression system indicator. If the FSM detects a short to voltage on circuit 2315 (BK/PK), it stores DTC B29B0 in memory and illuminates the fire suppression system indicator. If the FSM detects an open or a short to voltage on circuit 2314 (LB/BK), it stores DTC B29B1 in memory and illuminates the fire suppression system indicator. If the FSM detects a short to ground on circuit 2314 (LB/BK), it stores DTC B29B2 in memory and illuminates the fire suppression system indicator.