S60 L5-2.4L VIN 64 B5244S6 (2003)
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 being used and determines the data to
be sent to the power seat module (PSM) (4/52), driver door module (DDM) (3/126) and passenger door module (PDM) (3/127). This is done when the
door is opened.
For model year 2003 the central electronic module (CEM) transmits information about which remote control locked the car.
From model year 2003 inclusive , the central electronic module (CEM) transmits information about which remote control locked the car and which
unlocked the car.
If the position of the seat is changed, the power seat module (PSM) (4/52) stores the new position before reverting to sleep mode.
Remote memory positions are stored in the power seat module (PSM) in the following cases:
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10 minutes after the door has been opened
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1 minute after the door has been closed
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With the ignition off
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When the key is removed from the ignition switch
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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:
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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.
On model year 1999-2002 cars, the system may exhibit unwanted properties. Only information about which remote control unlocked the car is
transmitted, a new memory position is not stored if the car was unlocked before this. This is because when a car door is opened and the power seat
module (PSM) switches into active mode, the module is unable to identify which remote control is being used.
In addition, when a door is open, it takes 10 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.
Maneuvering seats without memory
Power seats without memory do not have memory management buttons. The seat motors can only be operated directly via the control panel. This type of
seat does not have a power seat module (PSM). The seat motors are directly connected to the control panel.
