54 34 001 Checking function of electro-hydraulic convertible top

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WARNING: You are exposed to the risk of trapping body parts when working on the installed or removed convertible top.

Convertible top is centered by pin (2) during insertion into guide and locked by rotary striker (1).

Carefully close convertible top until rotary striker (1) has retracted by approx. 1/3 into striker.

Rotary striker (1) and pin (2) must close correctly and virtually silently.

Open and close convertible top at least 3 times.

Fig 1: Identifying Rotary Striker And Pin

Courtesy of BMW OF NORTH AMERICA, INC.

Check all line connections for fluid leaks.

If necessary, CHECK FLUID LEVEL .

NOTE: The drive has an additional function.

With the hardtop opened, the drive locks the hardtop on the base plate in the rear module.

The purpose of this function is crash locking.

In the event of a crash, the stored hardtop cannot fold forwards.

Function actuation, convertible top:

Fig 2: Function Actuation, convertible top

Courtesy of BMW OF NORTH AMERICA, INC.

Closing convertible top is only possible under following conditions:

from ignition lock position "R" (radio setting)

outside temperature is above -20 °C
rear lid (rear module) closed
vehicle stationary (driving speed 0 kph)
luggage compartment partition is in lower position
lateral inclination of the vehicle less than 11°
power windows are initialized
battery voltage greater than 11.5 volts
fewer than 5 opening and closing operations in succession (pump protection inactive)
temperature of hydraulic fluid for opening max. 90 °C and for closing max. 105 °C
hydraulic pump motor is not overheated
control switch is pressed

Automatic opening runs as follows:

Side windows are lowered
Unlock hardtop at the cowl panel
Switch off heated rear window (via the junction box electronics)
Unlock and open rear module
Pack rear roof shell on front roof shell
Store roof panel package in the rear module and lock
Close and lock rear module
Close side windows

Check-control messages

It is not possible to open and close the convertible top in certain situations.

Corresponding Check Control messages are displayed in the instrument cluster for this purpose.

The Check Control messages serve to explain in closer detail the red or yellow LED on the button which lights up in the event of a fault.

Fig 3: Identifying Check Control Messages

Courtesy of BMW OF NORTH AMERICA, INC.

CHECK CONTROL MESSAGES REFERENCE CHART

No.	Color:	ID	Check Control message	Supplementary note:
1	yellow	19	Boot open!
2	Red	401	Roof mechanism function failure!	Roof mechanism
				No roof movement possible. If the soft hardtop is not locked, contact the nearest BMW Service.
		447	Roof mechanism!	Roof mechanism Roof movement not completed. Please check whether roof movement is blocked. Then press button again.
		558	Roof control failure!	Roof control Roof position and interlock cannot be detected. If the roof locks safely, driving can continue. For information on checking the interlock, see Owner's Handbook.
		562	Roof not locked!	Roof Roof not locked. First open or close the roof completely, then continue driving.
3	yellow	416	Luggage-compartment partition!	Luggage compartment partition No roof movement possible. Move luggage compartment partition to the position required, refer to Owner's Handbook.
		432	Roof drive overheating!	Roof mechanism Roof operation overheated. Temporarily only closing function available.
		516	No roof operation possible!	Roof Roof operation only possible with vehicle at a standstill.
4	yellow	445	Vehicle not standing on level surface!	Roof mechanism Vehicle not standing on level surface! No roof movement possible.

Only when you have excluded the function conditions as fault sources can you start convertible top diagnosis.