GF77.20-D-2046H Rear Sliding Roof Unit Lock-Up Recognition, Function

GF77.20-D-2046H Rear Sliding Roof Unit Lock-up Recognition, Function

- with CODE (D24) Power tilting/sliding roof, passenger compartment

Function requirements:
- Circuit 30
- Circuit 15R ON
- No overvoltage or undervoltage
Overvoltage is present when voltage > 16.5 V. Undervoltage is present when voltage < 9 V.

The DBE control unit (N70) receives the voltage pulses from the rear tilting/sliding roof Hall sensor (M12/1b1) and rear tilting/sliding roof Hall sensor (M12/1b2) located on the rear tilting/sliding roof motor (M12/1m1) and evaluates them for position measurement.

If the Hall sensor pulse signals are missing, in spite of the rear tilting/sliding roof motor being actuated, the direction is reversed, e.g. the rear tilting/sliding roof motor is actuated in the opposite direction.After t = 160 ms, the rear tilting/sliding roof motor is switched off. The rear tilting/sliding roof (M12/1) is denormalized. A mechanical thermal protection switch protects against overload on the rear tilting/sliding roof motor.If the rear tilting/sliding roof Hall sensor pulse signals are missing, the rear tilting/sliding roof can be closed in time increments of t = 160 ms or with the emergency crank.

Emergency operation

When the rear tilting/sliding roof is actuated with an emergency operation, position is not sensed.It is then necessary to "normalize" the rear tilting/sliding roof.