Service Information; Service Notes; Diagnostic Notes - BMW 1 Series Reference Manual

Service Information

Service Notes

Consider the following helpful hints when servicing the E88 top:
• The rear power windows do not have an anti-trap mechanism. There is no one-
touch control function for closing the rear windows.
• No comfort closing from the outside door handle electronics.
On vehicles with Comfort Access, comfort closing cannot be activated from the
outside door handle electronics. Comfort closing is performed by the driver's door
lock and key.
• Maintenance-free hydraulic fluid.
Changing the hydraulic fluid is not necessary. If hydraulic fluid needs to be added
to the system due to leaks, only the approved hydraulic fluid may be used. (See
operating fluids in TIS). The hydraulic fluid must be filled up only to the mark on
the fluid reservoir.
• The hydraulic system is self-bleeding.
• The convertible top Hydraulic unit and its mechanism are replaced as a complete
assembly.

Diagnostic Notes

Consider the following helpful hints when diagnosing the E88 top:
• When working on the rollover protection system, if rollover protection is to be trig-
gered by the diagnostic system or manually by the technician, the convertible top
must first be opened. Otherwise the convertible top will be damaged. The is also
applies to mechanical activation of the roll over system.
• Particular characteristics of the open and close convertible top buttons.
– Terminal R ON while the button is being pressed.
– After top operation is complete, press and hold the button for longer than
20 seconds.
A fault code memory entry may occur due to operator error: example: if the front passen-
ger presses to open convertible top and the driver switches Terminal R ON. In this case,
the fault code is saved as "not present".
In the event that the "convertible top is temporarily out of action" message is displayed,
the system will reset after the top has been opened or closed using the button. The top
will then again be functional.
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E88 Complete Vehicle