Bravada 2WD L6-4.2L VIN S (2002)
Power Seat Control Module: Description and Operation
MEMORY SEAT MODULE (DSM)
Battery positive voltage is supplied through the seat circuit breaker to the DSM. In response to a valid manual or memory switch command, the DSM
will apply power and ground to the selected motors within 150 ms. To limit peak power, DSM restricts the number of motors that can be turned on
simultaneously to three motors. If the module detects all four switches at the same time, DSM turns on three seat adjusters: horizontal, front, and rear. If
the user continues to hold all four switches, the DSM actuates the fourth motor only after one of the first three motors has reached its end motion. For a
memory recall operation, the DSM first moves the horizontal, front, and rear motors first. If all four switches are still activated, DSM actuate the recline
motor only when one of the seat adjusters has reached its end motion. In order to conserve battery power, the DSM enters automatic standby mode
whenever the unit has been inactive for 16 seconds. In the standby mode, the DSM stores memory settings so that when it is awake again it knows where
the seat is set.
