Memory Functions

Battery voltage is supplied at all times to the memory function switch from the driver door module that is located on the driver door panel. When a memory switch is pressed, a reduced voltage from a series of resistors is applied through the switch contacts and the memory recall switch signal circuit to the driver door module (DDM). In response to the memory request, the DDM then sends a message to the memory seat module (MSM) via GMLAN serial data line indicating the memory request.

The current seat position may be recorded for 2 different drivers. To record a position, adjust the driver's seat, lumbar support, and both outside mirrors to a comfortable position. Then press and hold the memory 1 button until two beeps sound through the driver's side front speaker. A second seating and mirror position may be programmed by repeating the above steps and pressing button 2, for driver 2. When the MSM receives a memory set message, it records the feedback voltages from the seat and lumbar position sensors for the appropriate driver. Easy exit positions are not programmable; they are pre-programmed to move the entire seat rearward from the seat horizontal position stored in memory for the identified driver.

When a memory recall button is pressed, a single chime is sounded through the driver's side front speaker in order to acknowledge the signal has been received. The MSM then moves the appropriate seat and lumbar motors until the position sensor feedback voltages equal the feedback voltages stored in memory for the identified driver. When the EXIT button is pressed, a single chime is sounded in order to acknowledge the signal. The MSM will then move the entire seat approximately 1.5 inches rearward from the seat horizontal position stored in memory for the identified driver.

Memory recall operation is disabled if the shift lever is out of NEUTRAL (N) or PARK (P). The memory seat module receives the transmission selector position data via the GMLAN Serial Data circuit.