Memory Functions

WARNING: This page is about a different car, the 2011 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 driver memory/heated and cooled seat switch from the driver door module (DDM) that is located on the driver door panel. When a memory button is pressed, battery voltage is applied through the switch contacts, a series of resistors, and the memory recall switch signal circuit to the DDM. In response to this signal, the DDM sends a serial data message to the MSM indicating the memory request.

Memory positions may be recorded for 2 different drivers. To record a position, adjust the driver's seat, lumbar support, and steering wheel and column to the desired position. Press and hold the memory 1 button until two beeps sound indicating that the position has been stored to memory. A second memory 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, lumbar, and steering wheel and column position sensors for the appropriate driver.

When a memory recall button is pressed, a single beep will sound to acknowledge the command has been received. The MSM will then move the appropriate seat, lumbar, and steering wheel and column motors until the position sensor feedback voltages equal the feedback voltages 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 MSM receives the transmission selector position data via the GMLAN Serial Data circuit.