Memory Seat

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

The driver power seat is controlled by the Driver Seat Module (DSM). The driver seat control switch circuits are connected to inputs on the Driver Door Module (DDM) and apply fused voltage to the DDM inputs. The DDM communicates the seat control switch position by transmitting signal data to the DSM using the Standard Corporate Protocol (SCP) communication bus. The received signal data causes the DSM to apply voltage directly to the appropriate seat motor. Toggling the seat control switch in the opposite direction changes the input to the DDM and the signal transmitted to the DSM causing it to apply voltage to the opposite seat motor circuit. Ground is the normal state of the motor circuits through the DSM. The DSM internally switches the appropriate circuit from ground to voltage to adjust 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 seat position sensor.

Memory seat positioning can be recalled with the memory switches on the driver door panel or a programmed Remote Keyless Entry (RKE) transmitter. In either case, the DSM receives a memory recall 1 or 2 command from the DDM over the SCP communication network. The memory recall switches are a hardwired input to the DDM. The DDM also receives the RKE transmitter signals. Once a valid memory recall command is received from the DDM, the DSM outputs voltage and ground to the power seat motor assembly to move the driver seat. The DSM monitors the seat position sensors to return the seat to a stored position.

For information on programming memory positions or recalling a stored memory position, refer to Memory Position Programming .