Power Driver Seat With Memory

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Verify good battery condition before diagnosing the memory seat system. Poor battery condition may interfere with memory seat operation, even if vehicle starting is possible.

NOTE: A memory recall in progress does not prohibit the initiation of another memory recall; the most recently requested memory recall will be executed.

The driver power memory seat is controlled by the driver seat module (DSM). The memory seat feature allows the driver to program a personalized seat position that can be recalled using the memory switch or a remote keyless entry (RKE) transmitter. There are 2 memory settings possible. The exterior mirror positions are also stored and recalled with the driver memory seat positions.

The driver seat control switch provides voltage to the DSM when activated. The NEUTRAL position of the driver seat control switch position is a ground state through the seat control switch contacts. A voltage input causes the DSM to power the appropriate motor until the input is removed. Ground is the normal state of the motor circuits through the DSM and is not switched to control the motors. The DSM internally switches the appropriate circuit from ground to voltage for operating the motors.

As the seat is adjusted, the DSM constantly monitors the motor position sensors to record the current seat position. The DSM will remove voltage from the motor upon termination of the seat control switch input or if the DSM does not see movement from the motor by monitoring the position sensor.

The DSM communicates DTCs and other information using the MS-CAN communication bus. It should be noted for diagnostics that because CAN bus communication is more robust and reliable than other methods, it may be possible to have limited module communication with one of the CAN bus circuits disconnected or shorted to ground. Refer to MODULE COMMUNICATIONS NETWORK article for information concerning MS-CAN bus communication.

For information on programming memory positions or recalling a stored memory position, refer to Memory Position Programming . For information on remote keyless entry transmitter programming, refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS article.

The DSM is located under the driver seat. To install a new DSM, refer to MULTIFUNCTION ELECTRONIC MODULES article. Programmable module installation (PMI) must be carried out when installing a new DSM. Refer to MODULE CONFIGURATION article.

This part only diagnoses concerns specific to the memory seat. To diagnose a memory exterior mirror concern, refer to REAR VIEW MIRRORS article.