5 Series E61 523i (N52) TOUR
To enable a failure of the steering column switch cluster to be detected, a further a cyclic message is transmitted
when the data bus is active (cycle time: 1 second).
When changing the direction of adjustment, the centre console switch cluster first actuates the switching motor.
The actuation of this motor is time-dependent. The adjustment motor is not actuated until the direction of
adjustment is correctly set. The total adjustment movement is no more than 36 millimetres for tilt adjustment
and 40 millimetres for reach adjustment.
Steering-column memory
The position of the steering column in each direction of adjustment is recorded by a Hall sensor. This position is
stored in the centre console switch cluster (SZM). This allows the Key Memory to call up the position of the
steering column for up to 4 vehicle keys.
The tilt adjustment moves to the uppermost position to make it easier to get in and out of the vehicle.
For the easy-access facility, the steering-column adjustment is automatically actuated under the following
conditions:
•
Terminal R OFF
•
Terminal R ON and driver's door opened (via door contact)
•
Terminal 15 OFF with driver's door open (via door contact)
The steering-column memory is activated under the following conditions:
•
One of the two memory buttons for the seat-mirror memory and the steering-column memory on the seat is
pressed (from terminal R OFF).
•
Another remote control is used (personalisation). Condition: The selection "Last seat position after
unlocking" is activated in the "Settings" menu in the Central Information Display (CID) (from 09/2003).
In both cases, the steering-column memory will not move the steering column to the stored position until terminal
15 is switched ON.
Overheating protection for steering-column adjustment motors
To protect the motors against overheating, a temperature model is stored in the centre console switch cluster.
The temperature model makes allowance for the warming up and cooling down of the motors.
It is possible to move the steering column in either direction through the range of movement at least 6 times
before overheating protection is activated.
Notes for service staff
Service staff should note the following points:
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General information: [more ...]
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Diagnosis: ---
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Encoding/programming: ---
Subject to change.
SBT Fully electric steering-column adjustment E60, E61, E63, E64
BMW AG - TIS
06.02.2013 00:41
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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