Chery QQ Service Manual BCM Computer Control System
（1）the function of power windows timer
①After the start-up switch shut off, the power windows are operable within 30 seconds.
If the doors are opened or closed in the period, the power windows can be operated
within another 30 seconds.
②During lowering the power window, if an overload is detected, the power windows
are operable within 30 secs.
③Within the last 6 seconds of above-mentioned period, if the door window switch is
hold upwards for over 0.3 second, the door window then works in overloaded state to
prevent that the door window stops in opened state.
（2）The function of power windows
①operating condition
In the ON state of the start-up switch, after the start-up switch is turned off(the
operating time of the power window timer is within 30s)
②operating progress
The power window switch is actuated for over 0.3s, the door window rises and lowers
automatically. During its operating, if the power window switch is actuated once again,
the door window stops.
③stop conditions of the door windows
A. If the current through the door window motor is higher than 14.5A+1A, the door
window stops after 0.7s operating time.
B. After operating for 6s (required by raising and lowering the door window), the
operating stops.
Re※ ference: if raising or lowering not completed within 6s, check the overload current
detecting function of door window motor or the installation of the door edging and door
window regulator.
（3）stepping mode power window
①Operating condition: the same as that of power windows.
②Within 0.3s, if power window switch is in its raising or lowering position, the
door window operates in stepping mode with the step length of 0.5s.
③If raising and lowering switch is actuated in same direction N times within 0.3s,
the door window operates for a period of (0.5xN)s.
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