2000 BMW 540iA with Premium Sound DSP

2000 DSP Premium Sound connector information

The pinouts for the 15 pin connector are:
PIN - CONNECTION
1- Sub 1 +
2- Sub 2 +
3- LH Rear loudspeaker + (Touring LH rear speaker ground)
4- Radio on/antenna signal
5- RH rear loudspeaker + (Touring RH rear +)
6- Sub 4 -
7- Sub 3 -
8- Terminal 30 connects to Fuse 56
9- Sub 1 -
10- Sub 2 -
11- Touring LH rear +
12- Touring RH rear -
13- Sub 4 +
14- Sub 3 +
15- Terminal 31 connects to Ground Point

The pinouts for the 18 pin connector are:
PIN - CONNECTION
1- Not used
2- Low freq. negative (-) signal - Transceiver/charging electronics
3- Not used
4- Not used
5- I-bus Signal Line - Splice X18344
6- Not used
7- Not used
8- RH front speaker - Connects to Radio
9- LH front speaker - Connects to Radio
10-Not used
11 Low freq. voltage (+) signal - Transceiver/charging electronics
12-Not used
13-Telephone mute signal - Transceiver/charging electronics
14-Not used
15-Telephone ON signal - Transceiver/charging electronics
16-Not used
17-RH front speaker + - Connects to Radio
18-LH front speaker + - Connects to Radio

The pinouts for the 26 pin connector are:
PIN - CONNECTION
1- LH front woofer +
2- LH front woofer -
3- Not used
4- RH front mid-range -
5- LH front mid-range +
6- Not used
7- Not used
8- Not used
9- RH front mid-range +
10-LH front mid-range -
11-Right rear mid-range speaker/tweeter +
12-RH front tweeter +
13-RH front woofer +
14-LH front tweeter +
15 LH front tweeter -
16-Left rear mid-range speaker/tweeter -
17-Not used
18-Not used
19-Left rear mid-range speaker/tweeter +
20-Not used
21-Not used
22-Not used
23-Not used
24-Right rear mid-range speaker/tweeter -
25-RH front tweeter -
26 RH front woofer -