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.
2018 Ford Mustang EcoBoost, 2D Convertible, Automatic TransFACTORY OEM SERVICE PROCEDURE
Front Controls Interface Module (FCIM) - Dual Automatic Temperature Control (DATC)
Network Diagnostic Trouble Codes (DTCs) (U-codes) are often a result of intermittent concerns such as damaged wiring or low battery voltage occurrences. Additionally, vehicle repair procedures, such as module reprogramming, often set network Diagnostic Trouble Codes (DTCs). Replacing a module to resolve a network DTC is unlikely to resolve the concern. To prevent repeat network DTC concerns, inspect all network wiring, especially connectors. Test the vehicle battery. REFER to: Battery .
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| B105A:12 | Cabin Temperature Sensor Fan: Circuit Short To Battery | GO to Pinpoint Test N |
| B105A:14 | Cabin Temperature Sensor Fan: Circuit Short To Ground or Open | GO to Pinpoint Test N |
| B1081:07 | Left Temperature Damper Motor: Mechanical Failure | INSPECT for a binding or damaged linkage or door. REPAIR as necessary. If no condition is found, INSTALL a new driver side temperature door actuator. REFER to: Driver Side Temperature Door Actuator . . |
| B1081:11 | Left Temperature Damper Motor: Circuit Short To Ground | GO to Pinpoint Test I |
| B1081:12 | Left Temperature Damper Motor: Circuit Short To Battery | GO to Pinpoint Test I |
| B1081:13 | Left Temperature Damper Motor: Circuit Open | GO to Pinpoint Test I |
| B1082:07 | Right Temperature Damper Motor: Mechanical Failure | INSPECT for a binding or damaged linkage or door. REPAIR as necessary. If no condition is found, INSTALL a new passenger side temperature door actuator. REFER to: Passenger Side Temperature Door Actuator . |
| B1082:11 | Right Temperature Damper Motor: Circuit Short To Ground | GO to Pinpoint Test J |
| B1082:12 | Right Temperature Damper Motor: Circuit Short To Battery | GO to Pinpoint Test J |
| B1082:13 | Right Temperature Damper Motor: Circuit Open | GO to Pinpoint Test J |
| B1083:07 | Recirculation Damper Motor: Mechanical Failure | INSPECT for a binding or damaged linkage or door. REPAIR as necessary. If no condition is found, INSTALL a new air inlet mode door actuator. REFER to: Air Inlet Door Actuator . |
| B1083:11 | Recirculation Damper Motor: Circuit Short To Ground | GO to Pinpoint Test D |
| B1083:12 | Recirculation Damper Motor: Circuit Short To Battery | GO to Pinpoint Test D |
| B1083:13 | Recirculation Damper Motor: Circuit Open | GO to Pinpoint Test D |
| B1086:07 | Air Distribution Damper Motor: Mechanical Failure | INSPECT for a binding or damaged linkage or door. REPAIR as necessary. If no condition is found, INSTALL a new air distribution door actuator. REFER to: Air Distribution Door Actuator . |
| B1086:11 | Air Distribution Damper Motor: Circuit Short To Ground | GO to Pinpoint Test E |
| B1086:12 | Air Distribution Damper Motor: Circuit Short To Battery | GO to Pinpoint Test E |
| B1086:13 | Air Distribution Damper Motor: Circuit Open | GO to Pinpoint Test E |
| B10AF:11 | Blower Fan Relay: Circuit Short To Ground | GO to Pinpoint Test K |
| B10AF:15 | Blower Fan Relay: Circuit Short To Battery or Open | For an inoperative blower motor, GO to Pinpoint Test K For all other blower motor symptoms, GO to Pinpoint Test L |
| B10B5:11 | Left Panel Air Discharge Temperature: Circuit Short To Ground | GO to Pinpoint Test M |
| B10B5:15 | Left Panel Air Discharge Temperature: Circuit Short To Battery or Open | GO to Pinpoint Test M |
| B10B6:11 | Left Floor Air Discharge Temperature: Circuit Short To Ground | GO to Pinpoint Test M |
| B10B6:15 | Left Floor Air Discharge Temperature: Circuit Short To Battery or Open | GO to Pinpoint Test M |
| B10B8:63 | Push Buttons: Circuit / Component Protection Time-Out | This DTC sets when the buttons have been held down too long. ATTEMPT to clean buttons. CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test. If the DTC returns, refer to FCIM Guided Routine Testing . |
| B10B9:12 | Blower Control: Circuit Short To Battery | GO to Pinpoint Test K |
| B10B9:14 | Blower Control: Circuit Short To Ground or Open | For an inoperative blower motor, GO to Pinpoint Test K For all other blower motor symptoms, GO to Pinpoint Test L |
| B11E5:12 | Left HVAC Damper Position Sensor: Circuit Short To Battery | GO to Pinpoint Test I |
| B11E5:14 | Left HVAC Damper Position Sensor: Circuit Short To Ground or Open | GO to Pinpoint Test I |
| B11E6:12 | Right HVAC Damper Position Sensor: Circuit Short To Battery | GO to Pinpoint Test J |
| B11E6:14 | Right HVAC Damper Position Sensor: Circuit Short To Ground or Open | GO to Pinpoint Test J |
| B11E7:12 | Air Distribution Damper Position Sensor: Circuit Short To Battery | GO to Pinpoint Test E |
| B11E7:14 | Air Distribution Damper Position Sensor: Circuit Short To Ground or Open | GO to Pinpoint Test E |
| B11F0:12 | Air Intake Damper Position Sensor: Circuit Short To Battery | GO to Pinpoint Test D |
| B11F0:14 | Air Intake Damper Position Sensor: Circuit Short To Ground or Open | GO to Pinpoint Test D |
| B1A61:11 | Cabin Temperature Sensor: Circuit Short To Ground | GO to Pinpoint Test N |
| B1A61:15 | Cabin Temperature Sensor: Circuit Short To Battery or Open | GO to Pinpoint Test N |
| B1A63:11 | Right Solar Sensor: Circuit Short To Ground | GO to Pinpoint Test O |
| B1A63:15 | Right Solar Sensor: Circuit Short To Battery or Open | GO to Pinpoint Test O |
| B1A64:11 | Left Solar Sensor: Circuit Short To Ground | GO to Pinpoint Test O |
| B1A64:15 | Left Solar Sensor: Circuit Short To Battery or Open | GO to Pinpoint Test O |
| B1A69:12 | Humidity Sensor: Circuit Short To Battery | GO to Pinpoint Test N |
| B1A69:14 | Humidity Sensor: Circuit Short To Ground or Open | GO to Pinpoint Test N |
| B1B71:11 | Evaporator Temperature Sensor: Circuit Short To Ground | GO to Pinpoint Test P |
| B1B71:15 | Evaporator Temperature Sensor: Circuit Short To Battery or Open | GO to Pinpoint Test P |
| C1B14:11 | Sensor Supply Voltage A: Circuit Short To Ground | GO to Pinpoint Test Q |
| C1B14:12 | Sensor Supply Voltage A: Circuit Short To Battery | GO to Pinpoint Test Q |
| All Other FCIM Diagnostic Trouble Codes (DTCs) not listed in this chart | -- | Refer to the appropriate Information and Entertainment Systems article for the procedure. |
Factory Service Tools
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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.
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