Remote operation of seats
There are three memories in the power seat module (PSM) which store the seat positions for a maximum of 3 remote controls. There are also three further memory positions which can be stored from the control panel. The seat can store a total of six different memory positions.
Cars with power seats with memory have a personal setting function. Using this function, the positions of the mirrors and seat can be stored individually for each remote control (a maximum of three remote controls, i.e. remote memory positions 1, 2 and 3).
The customer parameters in the power seat module (PSM) (4/52) determine whether the remote memory for the seat is activated or not.
The remote control memory for the door mirrors can also be switched off. This is done using a customer parameter in the driver door module (DDM) (3/126) and passenger door module (PDM) (3/127). "Programming of the remote control settings" for seats and mirrors is carried out via VIDA vehicle communication.
The signal from the remote control is transmitted to the upper control module (UEM) (4/70) when the car is locked or unlocked. The upper electronic module (UEM) also identifies which remote control is being used. The central electronic module (CEM) (4/56) receives this information from the upper electronic module (UEM). The central electronic module (CEM) identifies and stores the remote control which is used. It also determines what information must be sent to the power seat module (PSM), driver door module (DDM) and passenger door module (PDM). This is done when the door is opened.
The central electronic module (CEM) transmits information about which remote control locked the vehicle and which remote control unlocked the vehicle.
If the position of the seat is changed, this new position is stored after 5 seconds.
Remote memory positions are stored in the power seat module (PSM) in the following cases:
- 5 minutes after the door has been opened
- 1 minute after the door has been closed
- With the ignition off
- When the key is removed from the ignition switch
- When a new remote control is activated.
The remote memory positions for the door mirrors are stored for the driver door module (DDM) and passenger door module (PDM) in the following cases:
- When the key is removed from the ignition switch
- When a new remote control is activated.
When the car is unlocked, the power seat module (PSM) uses the information about which remote control unlocked the car. This is so that the correct remote memory position can be selected (i.e. the seat position last set by the driver for this remote control). When the door is opened the seat starts to move to the programmed remote memory position. The seat can be stopped by pressing one of the buttons on the control panel.
If the car is opened with a key, the memory settings for the seat are not affected. Remote operation of the seat is not possible if the key is in the ignition switch.
In addition, when a door is open, it takes 5 minutes before the power seat module (PSM) switches to sleep mode. If this occurs, and the customer then attempts to set a new seat position, the information about which remote control opened the door will have been lost and a new memory position will not be stored.