Drivers Memory Seat

Drivers Memory Seat

NOTE: 6-way switch pack shown.





The memory control module can store up to three different driver seating, mirror and steering column positions for each key (up to 3 keys). The three-numbered memory and single memory store switches control memory storage and recall operations. Each switch is a momentary action push switch.

All seat adjustments are available whilst the ignition key is in position I or II or for a 10 minutes period from when either the driver door status is changed or the ignition key status changes from position I to position 0 (key in).

NOTE: This does not include lazy entry.

The mirror and steering column adjustment is only enabled when the ignition key is in position I or II.

Memory Recall
Memory recall has three memory positions stored for the seats, steering column and exterior mirrors. The switches for this function are located on driver's seat outer side trim panel. Pressing the appropriate numbered memory switch allows the seat to start moving to the position appropriate to that memory.

The following procedure will store a memory position:
^ Ensure the ignition key is in position I or II
^ Ensure reverse gear is not engaged
^ Manually adjust the seat to the desired position, using the seat switches
^ Press and release the 'memory store' switch
^ Press and release the desired numbered memory switch within 5 seconds

With the ignition key in position II, a single chime will be emitted from the instrument cluster to indicate that the store operation has been successful.

When a memory recall is initiated, to limit the overall current consumption, only two-seat axis will move towards their intended position at any one time. To minimize current load as the motors start, the initiation of each axis is phased with a 100 ms delay between each motor starting.

The cushion slide and backrest will move first, followed by the cushion height and tilt. If the vehicle is stationary, the memory recall will operate in a 'one-touch' mode, whereby the switch can be released and the seat will continue to move to the memory position. If, however, the vehicle is in motion when the switch is released, then the system will operate in manual mode. This means that when the switch is released, the seat will stop moving. In order to reach the intended memory position, the switch must not be released until all movement has stopped. The instrument cluster will emit a double chime to indicate that the recall operation has been successfully completed.

If any of the seat adjustment or memory switches are activated during a 'one touch' memory recall, the recall will be overridden and the seat will begin to move in the direction corresponding to the switch that has been pressed.

Both mirrors move simultaneously about the vertical axis first (left/right), and then, once all vertical axis movements are complete, about the horizontal axis (up/down). To minimize the number of mirror drives required, a method of sharing is implemented, which dictates that all movement about one axis is complete before movement about the other axis commences.

Mirror movement coincides with the following switch request table (the table below shows module pins of connector C2383):





Lazy Entry
Pressing the unlock button on the remote transmitter will initiate a memory recall. This feature is known as 'lazy entry'. If the seat movement, memory switch or the lock button on the remote transmitter is pressed, then the 'lazy entry' feature will stop immediately.

The memory settings are stored within Electronic Erasable Programmable Read Only Memory (EEPROM) of the memory control module each time the ignition switch is cycled from position II to position I. These are the positional values that a lazy entry request uses when the remote unlock button for that particular key is next pressed.

The lazy entry feature can be activated or deactivated via the setting menu of the high line instrument cluster. This provides the driver with the option to enable or disable lazy entry as required.

Immediate Adjustment
Pressing one of the manual adjustment switches will initiate the corresponding motor for that axis until the switch is released.

Only two seat motors can be driven at any one time. However, due to the sharing of relays, there are certain combinations of motors that cannot be driven together. The following table indicates which axis can and cannot be operated at the same time:





Key:
^ - = Not applicable
^ Yes = Can be activated together
^ No = Cannot be activated together (Physically impossible)
^ No* = Cannot be activated together (Relay sharing restriction)

If two axis are being driven and a third axis is requested to move, the third switch request is ignored until either of the two axis switches, already active, are released. The third axis movement may only be initiated providing the switch has been released and re-selected.

Seat adjustment can be initiated simultaneously with any mirror movement.