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.
2006 Ford Expedition 4WDFACTORY OEM SERVICE PROCEDURE
Dual Climate Controlled Seat Module
DUAL CLIMATE CONTROLLED SEAT MODULE (DUAL CCSM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Retrieved | Perform Test |
|---|---|---|---|
| B1111 | Driver Thermal Electric Device Control Over-temperature Fault | Continuous | If DTC B2729, B272A, B272B or B2930 is also present, GO to PINPOINT TEST S and diagnose that concern first. Otherwise, GO to PINPOINT TEST T . |
| B1112 | Driver Thermal Electric Device Control Shorted Fault | Continuous | If DTC B2729, B272A, B272B or B2930 is also present, GO to PINPOINT TEST S and diagnose that concern first. Otherwise, GO to PINPOINT TEST T . |
| B1113 | Passenger Thermal Electric Device Control Over-temperature Fault | Continuous | If DTC B2729, B272A, B272B or B2930 is also present, GO to PINPOINT TEST S and diagnose that concern first. Otherwise, GO to PINPOINT TEST T . |
| B1114 | Passenger Thermal Electric Device Control Shorted Fault | Continuous | If DTC B2729, B272A, B272B or B2930 is also present, GO to PINPOINT TEST S and diagnose that concern first. Otherwise, GO to PINPOINT TEST T . |
| B1120 | Driver Fan Feedback Circuit Short to Ground | Continuous | GO to PINPOINT TEST R . |
| B1122 | Passenger Fan Feedback Circuit Short to Ground | Continuous | GO to PINPOINT TEST R . |
| B251A | Passenger Tach Circuit Failure | On-Demand and Continuous | If DTC B1120 or B1122 is present, ignore DTC B252A at this time and GO to PINPOINT TEST R for diagnosis. Otherwise, GO to PINPOINT TEST Q . |
| B2521 | Driver Tach Circuit Failure | On-Demand and Continuous | If DTC B1120 or B1122 is also present, GO to PINPOINT TEST R for diagnosis. Otherwise, GO to PINPOINT TEST Q . |
| B2729 | Cushion Over-Temp Detected (Driver) | On-Demand and Continuous | GO to PINPOINT TEST S . |
| B272A | Passenger Cushion Over-Temp Detected | On-Demand and Continuous | GO to PINPOINT TEST S . |
| B272B | Passenger Back Over-Temp Detected | On-Demand and Continuous | GO to PINPOINT TEST S . |
| B272C | Driver Differential Temperature Fault | On-Demand and Continuous | GO to PINPOINT TEST V . |
| B272D | Passenger Differential Temperature Fault | On-Demand and Continuous | GO to PINPOINT TEST V . |
| B272E | Driver Ignition Run/Blower Circuit Short to Ground (Driver or Passenger) | On-Demand and Continuous | If DTC B1120 or B1122 is also present, GO to PINPOINT TEST R and diagnose that concern first. Otherwise, GO to PINPOINT TEST Q . |
| B2730 | Back Over-Temp Detected (Driver) | On-Demand and Continuous | GO to PINPOINT TEST S . |
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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