Signal Description, Audio Module (AUD) (2012): General

U=	DC voltage in volts (V)	UAC =	AC voltage in volts (V)
Ubat =	Battery voltage (V)	f =	Frequency in Hertz (Hz)
Ulow =	Voltage approximately 0 V	t =	Time in seconds
PWM =	Pulse width modulated signal as a %

Fig 1: Identifying Connector C442

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CONNECTOR C1

Breakout box connection	Control module terminal	Signal type	Ignition on
	#1	30-feed	Ubat
	#2	ground	Ulow

Fig 2: Identifying Connector MOST (Optical Signal)

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CONNECTOR C2

Breakout box terminal	Control module terminal	Signal type	Ignition on	Miscellaneous
	#1	MOST input signal		Optical input signal when the MOST network is activated
	#2	MOST output signal		Optical output signal when the MOST network is activated

Fig 3: Identifying Connector C977

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CONNECTOR C3

Breakout box terminal	Control module terminal	Signal type	Ignition on	Miscellaneous
#1	#1	Speaker left front door (-)	Analog output signal when the speaker is in use	0 - 19 V depending on control module output.
#2	#2	Middle speaker (-) (does not apply to High Performance)	Analog output signal when the speaker is in use	0 - 11 V depending on control module output.
#3	#3	Speaker right front door (-)	Analog output signal when the speaker is in use	0 - 19 V depending on control module output.
#4	#4	Speaker left rear door (-)	Analog output signal when the speaker is in use	0 - 19 V depending on control module output.
#5	#5	Speaker right rear door (-)	Analog output signal when the speaker is in use	0 - 19 V depending on control module output.
	#6	-	-
	#7	-	-
	#8	-	-
#9	#9	Speaker left front door (+)	Analog output signal when the speaker is in use	0 - 19 V depending on control module output.
#10	#10	Middle speaker (+) (does not apply to High Performance)	Analog output signal when the speaker is in use	0 - 11 V depending on control module output.
#11	#11	Speaker right front door (+)	Analog output signal when the speaker is in use	0 - 19 V depending on control module output.
#12	#12	Speaker left rear door (+)	Analog output signal when the speaker is in use	0 - 19 V depending on control module output.
#13	#13	Speaker right rear door (+)	Analog output signal when the speaker is in use	0 - 19 V depending on control module output.
	#14	-	-
	#15	-	-
	#16	-	-