Audio System - Clicking/Ratcheting Noise Using AUX Input
NO: 39-56DATE: 01-19-2007
MODEL:
S40 Model Year 07 ch. 250000 - 275354
V50 Model Year 07 ch. 270000 - 289846
C70 Model Year 07 ch. 010000 - 015376
XC90 Model Year 07 ch. 328000 - 366698
New S80 Model Year 07 ch. 000850 - 012307
SUBJECT: Clicking or ratcheting noise audible with AUX input selected
REFERENCE: VIDA repair information
DESCRIPTION
If the AUX input is selected and the audio volume is around 50% or higher, a clicking, ratcheting or humming noise may be audible if no media player is connected, or between songs with a connected media player.
PRODUCTION MODIFICATION:
The connection between the AUX input plug and the IAM (Integrated Audio Module) has been changed from shielded cable to twisted cable. This change was introduced after the chassis numbers indicated in the header
SERVICE:
An AUX service cable has been developed to minimize the noise in the vehicles listed in the header. If the customer is reporting the above symptoms and the vehicle is within the chassis numbers listed above, install the AUX service cable using the appropriate instructions included in this document.
Required parts:
P/N 30798531 AUX service cable for S80
P/N 30786841 AUX service cable XC90 S40 V50 C70
P/N 983747 Cable tie (2 required)
Required special tool:
9512639 Terminal removal tool
Input level matching
Since the sound quality and audio volume with the media player selected depends on both output volume of the media player and volume as set by the audio system of the car, it is important to set the volume as follows:
It is always more desirable to have the output level of the source (IPOD, MP3,etc...) as high as possible and to adjust the final volume level of the audio system using the " AUX input level" in the vehicle's audio system menu.
- Adjust AUX input level in the vehicle's audio system menu to 0
- Adjust audio volume to the required volume with radio or CD selected.
- Adjust volume on media player to minimum, connect the output of the player to the AUX input and start player.
- Adjust volume of the media player to reach the same volume level as when radio or CD was selected.
If this does not lead to a satisfactory result, adjust the AUX input volume through the ICM menu as described in the Owner's Manual.
AUX Service cable installation S40 V50 C70
1. S40 /V50 / C70
Remove the Media Player Module (IAM/MPM)
Remove the Media Player Module
(IAM/MPM), see:
Removal, replacement and installation
Electrical system
Media, communication and navigation
Entertainment equipment
2. S40 /V50 / C70
Remove wires
Remove:
- the red secondary lock from the grey connector to the Media Player Module (IAM/MPM)
- the existing terminals in socket 7, 9 and 14. Use removal tool, 9512639.
Position 7 = Black
Position 9 = Yellow
Position14 = shield
3. S40 /V50 / C70
Install the service cable
Install the service cable according to the markings on the terminals.
Install the secondary lock.
NOTE: The colors on the service cable will not match the wire colors that were removed
4. S40 /V50 / C70
Routing the service cable
Route and secure the service cable as shown behind the panel and install the connector to the AUX socket.
5. Install the media player
Install the Media Player Module (IAM/MPM),
see:
Removal, replacement and installation
Electrical system
Media, communication and navigation
Entertainment equipment
AUX Service cable installation XC90
1. XC90
Remove the upper section of the center console Remove:
- the surround (1)
- the pen holder/(the handset, if so equipped) (2)
- the screws, 6 pcs (3)
- the upper section of the center console (4)
- the connector for the AUX socket
2. XC90
Securing the cable
Secure the existing (AUX) cable using a tie strap.
3. XC90
Install the service cable
Install the service cable in the AUX socket and route the cable on the right-hand side of the gear selector.
Install:
- the upper section of the center console (4)
- the screws, 6 pcs (3)
- the pen holder/(the handset) (2)
4. XC90
Remove the bracket for the music player
Raise the bracket forward. See: Removal, replacement and installation Electrical system Media, communication and navigation Equipment for Maintenance
5. XC90
Pull the service cable forward, see image.
CAUTION: Pull the cable as far from the GSM module as possible.
6. XC90
Remove wires
Remove:
- the red secondary lock from the grey connector to the audio module (AUM)
- the existing terminals in socket 7, 9 and 14. Use removal tool, 951 2639.
Position 7 = brown
Position 9 = white
Position14 = brown/white
7. XC90
Install the service cable Install:
- the service cable according to the markings on the terminals
- The secondary lock and connector.
8. XC90
Secure the existing cable using a tie strap on the cable harness.
9. XC90
Install the bracket
Reinstall the bracket for the music player,
see:
Removal, replacement and installation
Electrical system Media,
communication and navigation
Equipment for Maintenance
AUX Service cable installation MY 2007 S80
1. S80 MY 2007
Remove general audio player
Remove the general audio player, see: Removal, replacement and installation Electrical system Media, communication and navigation Equipment for entertainment (radio/TV/VCR)
2. S80 MY 2007
Remove panels
Remove the panels. See illustration.
3. S80 MY 2007
Remove centre console screws
Remove the screws, 6 pcs, and the AUX socket.
4. S80 MY 2007
Routing of the cable
Install the new cable in the AUX socket. Then reinstall the AUX socket. Secure the existing AUX cable to prevent rattling. Raise the centre console slightly and route the cable forward to the audio player, see illustration.
Reinstall the screws, 6 pcs.
CAUTION: Ensure that the cable is not trapped or damaged.
5. S80 MY 2007
Remove secondary catch
Remove the secondary lock on the larger grey connector.
6. S80 MY 2007
Install service cable
Remove the three cables from sockets 10, 11 and 12. Use removal tool 951 2639.
Position 10 = brown
Position 12 = white
Position 11 = brown/white
Secure the old cables using a cable tie. Install the service cable according to the markings on the terminals. Install the secondary lock
7. S80 MY 2007
Install general audio player
Install the general audio player, see: Removal, replacement and installation Electrical system Media, communication and navigation Equipment for entertainment (radio/TV/VCR)
8. S80 MY 2007
Install panels
Reinstall the panels. See illustration.