Power Driver Seat With Memory

NOTE: A memory recall can be initiated only if the vehicle is in PARK or NEUTRAL gear and the ignition is not in START. A memory recall in progress is not affected by the ignition being in START or by moving the gearshift lever out of PARK or NEUTRAL.

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.

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 2 settings consist of 8 possible directions: the seat can be moved forward or backward and the front and back of the cushion can be moved up and down independently. The backrest of the seat can be moved forward and backward. Adjustable lumbar is not a memory option. The power seat feature operates independent of the ignition position.

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 MS-CAN bus communication is more robust and reliable than other methods, it may be possible to have limited module communication with one of the MS-CAN bus circuits disconnected or shorted to ground. Refer to Module Communications Network 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 RKE transmitter programming, refer to Handles, Locks, Latches and Entry Systems - With Intelligent Access (IA) .

The DSM is located under the driver seat. To install a new DSM, refer to Driver Seat Module (DSM) . Programmable Module Installation (PMI) must be carried out when installing a new DSM. Refer to Module Configuration .