Subaru 602 - Satellite Audio Controls

130
June 2013
Electrical Systems Operation & Diagnosis Module (602)
Satellite Audio Controls
AUDIO WIRING
Control Total Circuit Resistance
Mute 22.3
Volume - 88.5
Volume+ 192.2
Mode 335.5
Seek 602
Seek 1.142K
End of Circuit Resistance 4.68K
The satellite audio controls located on the steering wheel pad function by varying the resistance
between the 2 wires that lead from the radio chassis to the satellite audio control assemble.
The “end of circuit resistor” will send a high resistance value (approximately. 4.6 k ohms) to the
radio when no switches are closed maintaining the last set radio condition. Operating any of the
switches creates a parallel circuit, effecting the total circuit resistance.
The different resistance values operate the radio and only one control signal can be sent to the
radio at a time.
For example:
R4 = 360 Ω End of circuit resistance = 4680 Ω
RT= R1 x R2
R1 + R2
RT = 4680 x 360
4680 + 360
RT = 1684800
5040
RT= 334.29
024