Audio System - CD53 Speaker Ticking/Hissing Noise
SI B84 04 04Phone, Navigation Systems
February 2005
Technical Service
This Service Information bulletin supersedes S.I. B84 04 04 dated March 2004.
[NEW] designates changes to this revision
SUBJECT
[NEW] Ticking or Hissing Noise from Speakers with CD53 Radio
MODEL
E46 (3 Series) from 3/03 to 3/04 Production
E39 (5 Series) from 3/03 Production without DSP
E53 (X5) from 4/03 - 9/03 Production without DSP
SITUATION
[NEW]The customer complains that with the engine on and radio off, the speakers emit a light ticking or hissing noise. This only affects vehicles with the BMW Assist TCU (Telematics Control Unit) or the BMW ULF (Universal Bluetooth Hands-Free System) module installed.
CAUSE
Insufficient radio filtering
CORRECTION
If the noise disappears when disconnecting the 26-pin blue audio jumper plug then follow the procedure as outlined below.
E46 (3 Series)
1. A filter (P/N 61 12 6 941 649) will be installed at the radio.
E53 (X5) E39 (5 Series)
1. Install inline filter (P/N 61 12 6 942 027) at connector X400 (12-Pin natural) located on the left side of the luggage compartment.
PROCEDURE
E46 (3 Series)
1. Remove the radio and disconnect the Black 10-pin connector
2. Afier the 10-Pin connector has been removed from the radio~ remove the protective cover from the connector.
3. Remove the black wire (1) from pin location 8.
4. Remove the yellow wire (2) from pin location 3.
5. Take the black wire removed from the radio 10-pin connector pin location 8 and insert into pin location 2 of the black 3-pin (4) connector (supplied with filter kit P/N 61 12 6 941).
6. Take the yellow wire removed from the radio 10-pin connector pin location 3 and insert into pin location 1 of the black 3-pin (4) connector.
7. Connect both black 3-pin connectors (3) and (4) together.
8. Insert the yellow/red (1) wire from the filter into pin location 3 of the black 10-pin radio connector.
9. Insert the yellow/brown (2) wire from the filter into pin location 8 of the black 10-pin radio connector.
10. Reinstall the black 10-pin radio connector.
11. Reinstall radio and retest system.
PARTS INFORMATION
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.