2000 BMW 328i (E46) Technical Service Bulletin # 540701 Date: 011201
Sunroof - Revised Initialization Procedures
GROUP 54
Special Roofs
54 07 01
Woodcliff Lake, NJ
Service Engineering
December 2001
SUBJECT
Revised Sunroof Initialization Procedures
MODEL
E46, E38
SITUATION
A new, adaptive, sunroof drive motor was introduced in E46 production in 9/01. This new motor is available as a spare part under part number 67 61
6 918 977, which also fits the E38.
There is a revised initialization and normalization procedure for the adaptive motor described in the Repair Manual, section 54 0... "Notes on steel
and glass slide/tilt sunroofs (initialization/normalization/learning of characteristic curve)". These procedures must be followed in order for the
sunroof to function properly.
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PROCEDURE
After the new motor has been recoded in the normal manner, the procedure that must be used is as follows:
-- Push the sunroof button in the up (tilt) direction and hold. After approximately 20 seconds the sunroof panel will make a small down-up
movement. Release the button for no more than 5 seconds and push and hold it in the up (tilt) direction again.
-- The roof will run through a full open and close cycle.
Once this cycle is completed, the initialization and adaptation is complete.
Note:
If the motor runs in the wrong direction when pushing the button in the up (tilt) direction, preventing proper initialization, get the sunroof to the
closed position, and disconnect power to the motor for about 15 seconds.
Reconnect the motor and start the initialization procedure again, and it should work properly.
