Remote Operation Of Seats
In power seat module, left (PSL) (3/26) and power seat module, right (PSR) (3/27) there are three memories, 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 control module can store a total of six different memory positions.
Vehicles with power seats with memory have a personal setting function. Using this function, the positions of the door 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, left (PSL) and power seat module, right (PSR) 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 (Volvo scan tool).
The signal from the remote control is transmitted to the central electronic module (CEM) (4/56) when the car is locked or unlocked. The central electronic module (CEM) also identifies which remote control is being used, stores this information and decides what information (see below) must be sent to:
- the power seat module, left (PSL) and power seat module, right (PSR)
- driver door module (DDM)
- passenger door module (PDM).
The central electronic module (CEM) transmits information about which remote control locked the vehicle and which remote control unlocked the vehicle. This information is transmitted when the door is opened.
The seat position is first stored when the door is opened after unlocking. If the remote control that unlocked the car is different from the one that locked it, the previous position is stored and the seat position for the remote control being used is retrieved and the seat adjusted accordingly. If the vehicle is locked with another remote control than that used to unlock it, no memory position is stored the next time the car is unlocked.
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 vehicle is unlocked, the power seat module, left (PSL) and power seat module, right (PSR) 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 vehicle 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 approximately 5 minutes before the power seat module, left (PSL) and power seat module, right (PSR) switch 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.