Anti-Theft System - False Alarms in Heavy Rain

Cars
XC90
2003-2004

Section:
3

Group:
36

No.:
0026

Year:
04

Month:
04

Vehicles involved:
XC90 with sun roof and mass movement sensor module (MMS)

Mass movement sensor module (MMS) alarm, adjusting

Background

This Service Bulletin describes how to reduce the risk of false alarms caused by torrential rain.

Competence requirement

Volvo Level 1 Technician





Material

Automatic monitoring

False alarm, reduction

Preparatory work 1





Open the sun roof completely.

Removing the lens, interior lighting 2





Fold down the cover (1).

Press the clips (2) outwards. Remove the lens.

Removing the cover 3





Open the clips (2, 3). Remove the cover (1).

Removing the molding 4





Remove the molding around the front edge and short sides of the sun roof.

Pull the short sides of the trim towards the center so that the two front corners loosen.

Leave the trim hanging at the rear edge.

Removing the trim 5





Roll up two balls of paper or other clean material. Stuff the balls between the headlining and the roof as illustrated.

Note!
Do not damage or crease the headlining.

Removing the mass movement sensor 6





Remove the black installation tape. Discard the installation tape.

Carefully remove the mass movement sensor and remove the connector

Remove the old adhesive residue. Roll it with your fingers.

Installing the felt tape 7





Install 2 x pieces of felt tape on the interior lighting. Bend over the edge as illustrated.

Installing the mass movement sensor, preparatory work 8





Fill in the two markings on the headlining using a pencil so that they are easier to see.

Note!
Do not use a ball point or permanent marker pen. These can discolor the headlining.

Installing the mass movement sensor 9





Place double-sided adhesive tape on the underside of the mass movement sensor. Position a 9 mm drill bit as a spacer along the edge. Install the mass movement sensor exactly according to the markings on the headlining. Press into place for approximately 15 seconds.

Connect the connector.

Note!
Note the bulge on the left hand side of the mass movement sensor and the position of the drill. It is important that the position of the mass movement sensor is correct.

Remove the drill bit.

Installing the foil tape 10





Mark the center of the foil tape and the mass movement sensor. Remove the backing paper at one corner of the foil tape.

Position the foil tape behind the mass movement sensor, as close as possible without the tape being underneath the mass movement sensor Press the foil tape in to position and remove the backing paper as the foil is pushed into place.

Hint:
Do not remove all the backing paper at the same time. The foil tape becomes very difficult to handle.

Removing excess foil tape 11





Cut off excess foil tape. Discard the excess foil tape.

Installing the trim strip 12





Remove the paper balls. Reinstall the trim strip around the sunroof. Start by pressing the two front corners of the trim strip into place. Continue with the rest of the trim strip.

Installing the interior lighting 13





Reinstall the cover

Installing the lens 14





Install the lens. Ensure that the clips (2) snap into place.

Install the cover (1).

Close the sun roof.





WARRANTY STATEMENT:
Claims may be submitted under the New Car Warranty when there is a documented customer complaint using claim type 01.