Signal Specification

NOTE: It is important to check 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 2-Bit Connector

Courtesy of VOLVO CARS CORPORATION

CONNECTOR A

Terminal	Signal type	Ignition on	Other
#A1	Antenna signal	-	Input signal TMC/FMsub. Phantom power supply for the antenna amplifier.
#A2	Antenna signal	-	Output signal FMsub to the AM/FM tuner module (AFM).

Fig 2: Identifying Connector B

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CONNECTOR B

Terminal	Signal type	Ignition on	Other
#B1	30 supply	U = U_bat	-

Fig 3: Identifying Connector C

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CONNECTOR C

Terminal	Signal type	Ignition on
#C1	MOST input signal	Optical input signal when the MOST network is activated
#C2	MOST output signal	Optical output signal when the MOST network is activated