Memory Functions

WARNING: This page is about a different car, the 2002 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.

When a memory function switch is pressed, the associated signal circuit of the memory mirror module (MMM) is momentarily grounded. In response to this signal, the MMM then sends a message via the class 2 serial data line to the memory seat module (MSM) indicating that a memory function signal has been received.

The current seat position may be recorded for 2 different drivers. To record a seat position, adjust the drivers seat including the lumbar adjustments to a comfortable position, then press the SET button, within 5 seconds press button 1. A beep will sound each time a memory position is set. A second seating position may be programmed by repeating the above steps and pressing button 2. When the MSM receives a memory set message, the MSM records the feedback voltages from the seat and lumbar position sensors for the appropriate driver. Two easy exit positions can be programmed, one for each driver. The exit position is programmed by moving the seat to the desired exit position and then press the SET button followed by the EXIT button. When the MSM receives a set exit message, the MSM records the feedback voltages from the four seat position sensors for the appropriate driver. The lumbar support is not involved in the easy exit function.

When the memory 1 or memory 2 button is pressed, a single beep is sounded through the radio speaker in order to acknowledge the command and the MSM receives the memory recall message. In response to this message, the MSM applies battery positive voltage (B+) and ground to the seat and lumbar motors until the position sensor feedback voltages equal the feedback voltages stored in memory for the appropriate driver. When the EXIT button is pressed, a single beep is sounded in order to acknowledge the signal and the MSM receives the easy exit message. In response to this message, the MSM applies battery positive voltage (B+) and ground to the seat motors until the position sensor feedback voltages equal the feedback voltages stored in memory for the appropriate driver.

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