A18 Amplifier

Connector overview

NumberX-pin, colorDescription
X1877115-pin, blackConnector A Hifi-amplifier (Top hifi)
X1877218-pin, blackConnector B Hifi-amplifier (Top hifi)
X1877326-pin, blueConnector C Hifi-amplifier (Top hifi)

Pin assignments at connector X18771

PinTypeDescription / Signal typeConnection /
Measuring notes
1ASubwoofer speaker 1 voltage signalSubwoofer speaker
   
2ASubwoofer speaker 2 voltage signalSubwoofer speaker
   
3ALH rear loudspeaker voltage controlLeft rear speaker
   
4ARadio ON/antenna signalRadio Antenna amplifier
   
5ERH rear loudspeaker ground controlRight rear speaker
   
6ESubwoofer speaker 4 negative signalSubwoofer speaker
   
7ESubwoofer speaker 3 negative signalSubwoofer speaker
   
8ETerminal 30Fuse F72
   
9ESubwoofer speaker 1 negative signalSubwoofer speaker
   
10ESubwoofer speaker 2 negative signalSubwoofer speaker
   
11ATouringLeft rear speaker
   
12ATouringRight rear speaker
   
13ESubwoofer speaker 4 voltage signalSubwoofer speaker
   
14ESubwoofer speaker 3 voltage signalSubwoofer speaker
   
15MTerminal 31Ground point
   

Pin assignments at connector X18772

PinTypeDescription / Signal typeConnection /
Measuring notes
1 Not used 
   
2ELow frequency negative signalTelephone connector
   
3 Not used 
   
4 Not used 
   
5E/AI-bus signal lineSplice X18344
   
6 Not used 
   
7 Not used 
   
8ERH front loudspeaker ground controlN9 Radio/Top hifi
   
9ELH front loudspeaker ground controlN9 Radio/Top hifi
   
10 Not used 
   
11ALow frequency voltage signalTelephone connector
   
12 Not used 
   
13ETelephone mute signalTelephone connector
   
14 Not used 
   
15ETelephone ON signalTelephone connector
   
16 Not used 
   
17ERH front loudspeaker voltage controlN9 Radio/Top hifi
   
18ELH front loudspeaker voltage controlN9 Radio/Top hifi
   

Pin assignments at connector X18773

PinTypeDescription / Signal typeConnection /
Measuring notes
1ALH front woofer voltage controlLeft front speaker
   
2MLH front woofer ground controlLeft front speaker
   
3 Not used 
   
4MRH front medium-range speaker ground controlRight front speaker
   
5ALeft front mid-range speaker voltage controlLeft front speaker
   
6 Not used 
   
7 Not used 
   
8 Not used 
   
9ARH front medium-range speaker voltage controlRight front speaker
   
10MLeft front mid-range speaker ground controlLeft front speaker
   
11APositive activation, rear right medium-range speaker/tweeterRight rear speaker
   
12ARH front tweeter voltage controlRight front speaker
   
13ARH front woofer voltage controlRight front speaker
   
14ALH front tweeter voltage controlLeft front speaker
   
15MLH front tweeter ground controlLeft front speaker
   
16MNegative activation, rear left medium-range speaker/tweeterLeft rear speaker
   
17 Not used 
   
18 Not used 
   
19APositive activation, rear left medium-range speaker/tweeterLeft rear speaker
   
20 Not used 
   
21 Not used 
   
22 Not used 
   
23 Not used 
   
24MNegative activation, rear right medium-range speaker/tweeterRight rear speaker
   
25MRH front tweeter ground controlRight front speaker
   
26MRH front woofer ground controlRight front speaker