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.
2008 Ford Expedition 4WDFACTORY OEM SERVICE PROCEDURE
Driver Seat Module (DSM)
DRIVER SEAT MODULE (DSM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Retrieved | Perform Test |
|---|---|---|---|
| B1530 | Memory SET Switch Circuit Short to Ground | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1534 | Memory 1 Switch Circuit Short to Ground | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1538 | Memory 2 Switch Circuit Short to Ground | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1663 | Seat Driver Front Up/Down Motor Stalled | On-Demand | If the motor does not operate, go to Pinpoint Test L . If motor operates, go to Pinpoint Test M . |
| B1664 | Seat Driver Rear Up/Down Motor Stalled | On-Demand | If the motor does not operate, go to Pinpoint Test L . If motor operates, go to Pinpoint Test M . |
| B1665 | Seat Driver Forward/Backward Motor Stalled | On-Demand | If the motor does not operate, go to Pinpoint Test L . If motor operates, go to Pinpoint Test M . |
| B1666 | Seat Driver Recline Motor Stalled | On-Demand | If the motor does not operate, go to Pinpoint Test L . If motor operates, go to Pinpoint Test M . |
| B1703 | Seat Driver Recline Forward Switch Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test L . |
| B1707 | Seat Driver Recline Rearward Switch Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test L . |
| B1711 | Seat Driver Front Up Switch Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test L . |
| B1715 | Seat Driver Front Down Switch Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test L . |
| B1719 | Seat Driver Forward Switch Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test L . |
| B1723 | Seat Driver Rearward Switch Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test L . |
| B1727 | Seat Driver Rear Up Switch Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test L . |
| B1731 | Seat Driver Rear Down Switch Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test L . |
| B1952 | Seat Rear Up/Down Position Feedback Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1953 | Seat Rear Up/Down Position Feedback Circuit Short to GND/Open Circuit | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1956 | Seat Front Up/Down Position Feedback Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1957 | Seat Front Up/Down Position Feedback Circuit Short to GND/Open Circuit | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1960 | Seat Recline Forward/Backward Position Feedback Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1961 | Seat Recline Forward/Backward Position Feedback Circuit Short to GND/Open Circuit | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1964 | Seat Horizontal Forward/Rearward Position Feedback Circuit Short to Battery | On-Demand and Continuous | Go to Pinpoint Test M . |
| B1965 | Seat Horizontal Forward/Rearward Position Feedback Circuit Short to GND/Open Circuit | On-Demand and Continuous | Go to Pinpoint Test M . |
| B2300 | Seat Driver Memory Position Error | Continuous | Go to Pinpoint Test M . |
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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