2006 Ford Expedition 4WDFACTORY OEM SERVICE PROCEDURE

Brake System DTCS

DRIVER SEAT MODULE (DSM) DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description Source Perform Test
B1529 Memory Set Switch Circuit Short to Battery DSM REFER to PINPOINT TEST G: THE MEMORY MIRROR IS INOPERATIVE -- DOES NOT OPERATE FROM THE MEMORY SET SWITCH .
B1663 Seat Driver Front Up/Down Motor Stalled DSM REFER to PINPOINT TEST I: THE MEMORY SEAT IS INOPERATIVE -- EXPEDITION, EXCEPT LIMITED .
B1664 Seat Driver Rear Up/Down Motor Stalled DSM REFER to PINPOINT TEST I: THE MEMORY SEAT IS INOPERATIVE -- EXPEDITION, EXCEPT LIMITED .
B1665 Seat Driver Forward/Backward Motor Stalled DSM REFER to PINPOINT TEST I: THE MEMORY SEAT IS INOPERATIVE -- EXPEDITION, EXCEPT LIMITED .
B1667 Mirror Driver Up/Down Motor Stalled DSM REFER to PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE or PINPOINT TEST G: THE MEMORY MIRROR IS INOPERATIVE -- DOES NOT OPERATE FROM THE MEMORY SET SWITCH .
B1668 Mirror Driver Right/Left Motor Stalled DSM REFER to PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE or PINPOINT TEST G: THE MEMORY MIRROR IS INOPERATIVE -- DOES NOT OPERATE FROM THE MEMORY SET SWITCH .
B1669 Mirror Passenger Up/Down Motor Stalled DSM REFER to PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE or PINPOINT TEST G: THE MEMORY MIRROR IS INOPERATIVE -- DOES NOT OPERATE FROM THE MEMORY SET SWITCH .
B1670 Mirror Passenger Right/Left Motor Stalled DSM REFER to PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE or PINPOINT TEST G: THE MEMORY MIRROR IS INOPERATIVE -- DOES NOT OPERATE FROM THE MEMORY SET SWITCH .
B1697 Mirror Driver/Passenger Switch Circuit Short to Battery DSM REFER to PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE .
B1711 Seat Driver Front Up Switch Circuit Short to Battery DSM REFER to PINPOINT TEST I: THE MEMORY SEAT IS INOPERATIVE -- EXPEDITION, EXCEPT LIMITED .
B1715 Seat Driver Front Down Switch Circuit Short to Battery DSM REFER to PINPOINT TEST I: THE MEMORY SEAT IS INOPERATIVE -- EXPEDITION, EXCEPT LIMITED .
B1719 Seat Driver Forward Switch Circuit Short to Battery DSM REFER to PINPOINT TEST I: THE MEMORY SEAT IS INOPERATIVE -- EXPEDITION, EXCEPT LIMITED .
B1723 Seat Driver Rearward Switch Circuit Short to Battery DSM REFER to PINPOINT TEST I: THE MEMORY SEAT IS INOPERATIVE -- EXPEDITION, EXCEPT LIMITED .
B1727 Seat Driver Rear Up Switch Circuit Short to Battery DSM REFER to PINPOINT TEST I: THE MEMORY SEAT IS INOPERATIVE -- EXPEDITION, EXCEPT LIMITED .
B1731 Seat Driver Rear Down Switch Circuit Short to Battery DSM REFER to PINPOINT TEST I: THE MEMORY SEAT IS INOPERATIVE -- EXPEDITION, EXCEPT LIMITED .
B1735 Mirror Driver Vertical Switch Circuit Short to Battery DSM REFER to PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE .
B1739 Mirror Driver Horizontal Switch Circuit Short to Battery DSM REFER to PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE .
B1743 Mirror Passenger Vertical Switch Circuit Short to Battery DSM REFER to PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE .
B1747 Mirror Passenger Horizontal Switch Circuit Short to Battery DSM REFER to PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE .
B1950 Seat Rear Up/Down Potentiometer Feedback Circuit Failure DSM REFER to PINPOINT TEST J: THE MEMORY SEAT DOES NOT OPERATE CORRECTLY -- DOES NOT OPERATE USING THE MEMORY SET SWITCH .
B1952 Seat Rear Up/Down Potentiometer Feedback Circuit Short to Battery DSM REFER to PINPOINT TEST J: THE MEMORY SEAT DOES NOT OPERATE CORRECTLY -- DOES NOT OPERATE USING THE MEMORY SET SWITCH .
B1954 Seat Front Up/Down Potentiometer Feedback Circuit Failure DSM REFER to PINPOINT TEST J: THE MEMORY SEAT DOES NOT OPERATE CORRECTLY -- DOES NOT OPERATE USING THE MEMORY SET SWITCH .
B1956 Seat Front Up/Down Potentiometer Feedback Circuit Short to Battery DSM REFER to PINPOINT TEST J: THE MEMORY SEAT DOES NOT OPERATE CORRECTLY -- DOES NOT OPERATE USING THE MEMORY SET SWITCH .
B1962 Seat Horizontal Forward/Rearward Potentiometer Feedback Circuit Failure DSM REFER to PINPOINT TEST J: THE MEMORY SEAT DOES NOT OPERATE CORRECTLY -- DOES NOT OPERATE USING THE MEMORY SET SWITCH .
B1964 Seat Horizontal Forward/Rearward Potentiometer Feedback Circuit Short to Battery DSM REFER to PINPOINT TEST J: THE MEMORY SEAT DOES NOT OPERATE CORRECTLY -- DOES NOT OPERATE USING THE MEMORY SET SWITCH .
B1987 Pedal Forward / Rearward Motor Stalled DSM GO to PINPOINT TEST C .
B1988 Pedal Position Forward Switch Circuit Short to Battery DSM GO to PINPOINT TEST C .
B1989 Pedal Position Rearward Switch Circuit Short to Battery DSM GO to PINPOINT TEST C .
B1990 Pedal Forward / Rearward Potentiometer Feedback Circuit Failure DSM GO to PINPOINT TEST D .
B1991 Pedal Forward / Rearward Potentiometer Feedback Circuit Short to Battery DSM GO to PINPOINT TEST D .
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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