Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1359 (FIRE SUPPRESSION SYSTEM)DIAGNOSTIC TESTSFIRE SUPPRESSION SYSTEMDTC INDEX
2009 Mercury Milan Premier, 3.0 1, AWD
DTC Index
2009 Mercury Milan Premier, 3.0 1, AWDSECTION DTC Index
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.
NOTE:
When the FSSM detects a system fault, it causes the fire suppression system indicator to flash a coded sequence of lamp fault codes (LFC). The FSSM is capable of communicating a LFC for each specific fault that is present, including each flagged fault of a bit-mapped DTC (except for DTCs B1317 and B1318 for which the indicator remains lit continuously). The LFC is made up of 2 numbers. Each of the 2 numbers is 1 or 2 digits, depending on the fault that is present. The 2 numbers that make up a LFC are separated by a hyphen (-) to clearly distinguish between the 2 numbers. The first number is flashed with a 0.5-second interval between pulses. There is a 2-second pause before the second number is flashed, which also has a 0.5-second interval between pulses. There is a 5-second pause between each display of a LFC and each LFC is flashed 3 times after which the fire suppression system indicator remains lit for the remainder of the key-on cycle.
FIRE SUPPRESSION SYSTEM MODULE (FSSM) DIAGNOSTIC TROUBLE CODE INDEX
| DTC | LFC | Description | Action |
|---|---|---|---|
| B1231 | 1-3 | Event Threshold Exceeded | The fire suppression system was activated. INSTALL a new fire suppression system module (FSSM), new LH and RH fire suppressors, new fire suppression manifolds and a new fire suppression manual switch (if the plastic cover is damaged). REFER to Fire Suppression System Module (FSSM) , Fire Suppressor , Fire Suppression Manifold and Fire Suppression Manual Switch . TEST the system for normal operation. |
| B1317 | Continuous | Battery Voltage High | REFER to CHARGING SYSTEM - GENERAL INFORMATION article. |
| B1318 | Continuous | Battery Voltage Low | REFER to CHARGING SYSTEM - GENERAL INFORMATION article. |
| B1342 | 1-2 | ECU Is Faulted | INSTALL a new FSSM. REFER to Fire Suppression System Module (FSSM) . TEST the system for normal operation. |
| B1921 | 1-4 | Air Bag Diagnostic Monitor Ground Circuit Open | REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, & WARNING CHIMES article. |
| B2477 | 5-4 | Module Configuration Failure | INSTALL a new FSSM. REFER to Fire Suppression System Module (FSSM) . TEST the system for normal operation. |
| B2792 | 12-11 | Cross Link Between Firing Loops | Go to Pinpoint Test I . |
| B2900 | 11-8 | VIN Mismatch | Go to Pinpoint Test A . |
| B299A | 1-9 | Suppressor Left Circuit Open - Loop # 1 | Go to Pinpoint Test B . |
| B299B | 8-7 | Suppressor Left Circuit Short to Battery - Loop # 1 | Go to Pinpoint Test E . |
| B299C | 8-3 | Suppressor Left Circuit Short to Ground - Loop # 1 | Go to Pinpoint Test F . |
| B299E | 8-11 | Suppressor Left Circuit Resistance Low on Squib - Loop # 1 | Go to Pinpoint Test H . |
| B299F | 8-1 | Suppressor Left Circuit Open - Loop # 2 | Go to Pinpoint Test D . |
| B29A0 | 8-8 | Suppressor Left Circuit Short to Battery - Loop # 2 | INSTALL a new FSSM. REFER to Fire Suppression System Module (FSSM) . TEST the system for normal operation. |
| B29A1 | 8-4 | Suppressor Left Circuit Short to Ground - Loop # 2 | Go to Pinpoint Test G . |
| B29A3 | 8-12 | Suppressor Left Circuit Resistance Low on Squib - Loop # 2 | Go to Pinpoint Test G . |
| B29A4 | 2-1 | Suppressor Right Circuit Open - Loop # 1 | Go to Pinpoint Test C . |
| B29A5 | 8-9 | Suppressor Right Circuit Short to Battery - Loop # 1 | Go to Pinpoint Test E . |
| B29A6 | 8-5 | Suppressor Right Circuit Short to Ground - Loop # 1 | Go to Pinpoint Test F . |
| B29A8 | 8-13 | Suppressor Right Circuit Resistance Low on Squib - Loop # 1 | Go to Pinpoint Test H . |
| B29A9 | 8-2 | Suppressor Right Circuit Open - Loop # 2 | Go to Pinpoint Test D . |
| B29AA | 8-10 | Suppressor Right Circuit Short to Battery - Loop # 2 | INSTALL a new FSSM. REFER to Fire Suppression System Module (FSSM) . TEST the system for normal operation. |
| B29AB | 8-6 | Suppressor Right Circuit Short to Ground - Loop # 2 | Go to Pinpoint Test G . |
| B29AD | 8-14 | Suppressor Right Circuit Resistance Low on Squib - Loop # 2 | Go to Pinpoint Test G . |
| B29AE | 7-1 | Fire Suppression Manual Activation Switch Closed at Key On | CLEAR the DTCs. REPEAT the self-test. If DTC B29AE is retrieved, INSTALL a new fire suppression manual switch. REFER to Fire Suppression Manual Switch . CLEAR the DTCs. REPEAT the self-test. |
| B29AF | 5-1 | Fire Suppression Manual Activation Switch High Side Circuit Failure | Go to Pinpoint Test J . |
| B29B0 | 7-9 | Fire Suppression Manual Activation Switch High Side Circuit Short to Battery | Go to Pinpoint Test J . |
| B29B1 | 5-2 | Fire Suppression Manual Activation Switch Low Side Circuit Failure | Go to Pinpoint Test J . |
| B29B2 | 7-2 | Fire Suppression Manual Activation Switch Low Side Circuit Short to Ground | Go to Pinpoint Test J . |
| B29B3 | None | Fire Suppression Indicator Lamp Circuit Failure | REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, & WARNING CHIMES article. |
| B29B4 | None | Fire Suppression Indicator Lamp Circuit Short to Battery | REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, & WARNING CHIMES article. |
| P0630 | 11-8 | VIN Not Programmed or Incompatible - ECM/PCM | Go to Pinpoint Test A . |
| U1900 | 1-6 | CAN Communication Bus Fault - Receive Error | If any ABS module DTCs are present, REFER to VEHICLE DYNAMIC SYSTEMS article. If no ABS module DTCs are present, REFER to MODULE COMMUNICATIONS NETWORK article. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.