General description

GENERAL DESCRIPTION

The movement of the left electric window (driver's side) is automatic, controlled by a control unit which operates it according to the following logic:

• keeping the pushbutton pressed (over 300 ms.), the window opens or closes normally until the pushbutton is released;
• a short pulse (below appr. 300 ms.) operates the motor which automatically stops when the stop limit is reached (window open or closed completely);
• an even shorter pulse (less than appr. 50 ms.) is considered by the control unit as an accidental shock and no action will result.

This operating logic takes place through the "key-operated" supply".

The electrical mechanism that operates the right front window is of the conventional type: when the button is pressed the window rises or drops; it is fitted with two control switches: one on the right-hand door and one on the left-hand door; operation is only possible with the ignition key engaged.

FUNCTIONAL DESCRIPTION

Fusebox "A" or "C":

The power window control unit 38 is supplied at pin 2 of connector B by the battery voltage through fuse F22 of fusebox G1.

The key-operated enable signal reaches pin 1 of connector A via fuse F17 (box "A") or fuse F15 (box "C") still of G1.

The control signals for the upward and downward stroke respectively reach pins 4 and 3 of connector A from the left-hand window control switch B53.

In fact, this double switch sends an earth to the control unit from the part in which the contact has been closed (pin 1 = up; pin 2 = down).

The operating signals (up or down) leave pins 3 and 4 of connector B of N38 for the left-hand window motor P15 12 V and earth are inverted to change the direction of rotation

Fusebox "B"

The power window control unit N38 receives the key-operated supply at pin 2 of connector B via wander fuse G311 and relay I12.

The key-operated consenus reaches at pin 1 of connector A via fuse F17 still of G1.

The control signals respectively for raising and lowering the windo reach pins 4 and 3 of connector A leading from the control switch of the left-hand window B53.

This double switch sends an earth from the control unit from the part in which the contact has been closed (pin 1 = up; pin 2= down).

The operating signals (up or down) for the left-hand window motor P15 leave from pins 3 and 4 of connector B of N38 12 V and earth are inverted to change the direction of rotation

Pin 1 of connector B of N38 is connected to earth.

Operation of the right-hand window is controlled directly by one of the two switches B21 (B21a located on the right-hand door, B21b on the left) which are connected in series

The "key-operated" supply leads through relay I12, energized through the line of fuse F17 of G1, and wander fuse G310. The motor for the right-hand window P14 is operated by one of the two switches B21 in one direction or in the other depending on the origin of the 2V and earth signals.

Pin 1 of connector B of N38 is connected to earth.

Conversely, the operation of the right-hand motor is controlled directly by one of the two switches B21 (B21a located on the right-hand door, B21b on the left) which are connected in series.

The "key-operated" supply passes through relay I12, supplied by direct voltage through the line of fuse G310. The relay is energised with the key-operated supply, via fuse F17 (box "A") or fuse F15 (box "C") still of G1 the righthand window motor P14 is operated by one of the two switches B21 in one direction or the other depending on the origin of the 12V or earth signal.