Function of protective devices

P91.29-0247-06

M25 Left front ESA motor group

M26 Right front ESA motor group

N31 Left ESA control module

N32 Right ESA control module

N32/5 Left seat proximity control module

N32/6 Right seat proximity control module

Automatic backrest locking

The locking of the integral seat backrest is monitored by a safety package.

If the safety package recognizes a seat backrest is not locked when the ignition is switched on and the door is closed, the "Backrest adjustment forwards" function is triggered via the ESA control module (N31 and N32).

Only the "Backrest adjustment" function is actuated during automatic backrest locking. All other functions are disabled.

The function is switched off if after approx. 20 seconds neither the backrest is locked nor the adjustment travel limit is reached. Normal adjustment is possible again after this.

Evading movements

To prevent a collision between the backrest and soft top compartment during large adjustment travels and steep backrest inclination, a seat proximity control module (N32/5 and N32/6) is installed.

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Once the minimum distance between the seat and soft top compartment is not achieved, the respective adjustment function (basic function) is stopped and an appropriate auxiliary function is performed:

Case: Basic function: Auxiliary function:

a) Fore/aft adjustment backrest adjustment

backwards forwards

b) Backrest adjustment fore/aft adjustment

backwards forwards

c) Height adjustment at backrest adjustment

rear down forwards

The basic function is switched on again once the minimum distance is exceeded.

Locking protection

The individual motors are equipped with thermal switches to protect the motors in the front ESA motor group (M25 and M26) from overheating in the event of a locked seat.

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