Signal Specification

NOTE:

It is important to connect the breakout box and check the ground terminals before taking readings.

U=	DC voltage in volts (V)	U_low =	Voltage approximately 0 V
U_bat =	Battery voltage (V)

Fig 1: Identifying Connector A, Subwoofer Module (Sub)

Courtesy of VOLVO CARS CORPORATION

CONNECTOR A, SUBWOOFER MODULE (SUB)

Terminal	Breakout box terminal	Signal type	Ignition on
#A1	#51	Ground	U=U_low
#A2	#52	-	-
#A3	#53	15 supply	U = U_bat
#A4	#54	-	-

Fig 2: Identifying Connector C

Courtesy of VOLVO CARS CORPORATION

CONNECTOR B, AUDIO MODULE (AUD)

Terminal	Breakout box terminal	Signal type	Ignition on	Other
#B1	-	MOST input signal	Optical input signal when the MOST network is activated
#B2	-	MOST output signal	Analog output signal when the loudspeaker is in use