Memory Functions

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

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 drivers seat, lumbar support, steering wheel, 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, the MSM records the feedback voltages from the seat recline, and lumbar position sensors for the appropriate driver. Two personalized exit positions can be set by first recalling driver position 1 or 2, positioning the seat and steering wheel, except the lumbar support, in the desired exit positions and then press and hold the memory exit button until two beeps sound. When the MSM receives a set easy exit message, it records the feedback voltages from the seat position sensors and the for the appropriate driver.

When the 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, while the MSM receives the memory recall message. The MSM then applies battery positive voltage to the appropriate 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 and the MSM receives the easy exit message. The MSM then applies battery positive voltage to the seat motors until the position sensor feedback voltages equal the feedback voltages stored in memory for the identified driver exit position.

Memory recall will not work if the shift lever is out of NEUTRAL (N) or PARK (P).