General description

GENERAL DESCRIPTION

The sliding roof offers extra ventilation for the passenger compartment in warm weather and, when necessary, quick air changing, thereby increasing passenger comfort.

The mobile part of the roof comprises a glass pane and an interior sliding blind which is concealed in the roof panel trim.

A double switch, located next to the front ceiling light, operates a motor in two different ways: in the first, the motor raises the panel to the "quarter light" position, in the second, it opens the actual panel (for further details see GROUP 70 - "BODY-SUNROOF").

The whole system is controlled electronically by a control unit which regulates the various functions.

The sunroof can only be operated with the ignition key engaged.

FUNCTIONAL DESCRIPTION

The sunroof opening control system is powered by a special relay I58, located near the fusebox G1. The line is protected by wander fuse G261; system supply only takes place via the key-operated supply at pin 4 of the control switch B47, while pin 5 of the latter is connected to earth.

The system is a single functional unit comprising :

• control unit N60;

• motor P24;

• stroke limit contact H51.

The control switch B47 is located on the tunnel console.

The control unit N60 receives the operating signals from switch B47 and controls the motor P24 accordingly, taking account of any signal leading from the microswitch H51.

The system works according to the following logic:

• switch B47 controls opening/closing of the sunroof: pin 4 of the same switch is supplied at 12 V: the pressing of the pushbutton in one direction controls sunroof opening, closing the contact on pin 2, thereby sending 12 V to pin 5 of the control unit; pressing in the opposite direction controls closing of the sunroof, closing the contact on pin 1, sending 12 V to pin 2 of the control unit;

• Pins 2 and 5 receive the control signals from switch B47; pins 9 and 7 are connected with the "zero" microswitch H51 the contact of which is closed when the sunroof is in the "compass" position and open in all the other positions;

• pins 4 and 8 connect with the motor P24 operating it in the two directions sending alternately 12 V and earth signals.

FAULTFINDING TABLE

(1) N.B.: P24 and H51 are together in a single sunroof control unit N60 which must be changed completely in the event of a failure to a component.