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Home >> Volvo >> 2002 >> S60 Base, 2.4 61, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 25 (Media, Communication And Navigation - Specifications, Electrical/Electronic) >> Signal Specification (1999-2006) >> Signal specification, RTI >> Checking RTI and TV receiver control modules >> RTI control module (to audio unit)

RTI control module (to audio unit)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Audio Control Module (Cable Between Audio Module & CD Changer/Navigation Unit)
GLL104159Courtesy of VOLVO CARS OF NORTH AMERICA.

Before taking any readings, see Connecting the breakout box and checking the ground terminal .

The RTI control module terminals E1-E8 correspond to terminal #16-#23 on the breakout box.

Control module terminal  Breakout box terminal Signal type  Ignition on  Signal specification 
E1 #16 Clock signal to audio unit Digital signal Melbus protocol
E2 #17 Signal ground, sound Ulow -
E3 #18 15 supply Ubat -
E4 #19 Data signal to audio unit Digital signal Melbus protocol
E5 #20 Busy signal to audio unit Digital signal Melbus protocol
E6 #21 Left audio channel Alternating current on sound to loudspeakers 150 mV rms +/- 38 mV
(1 kHz 30% mod)
E7 #22 Right audio channel Alternating current on sound to loudspeakers 150 mV rms +/- 38 mV
(1 kHz 30% mod)
E8 #23 Voice guide channel Alternating current on sound to loudspeakers (for voice guidance) 150 mV rms +/- 38 mV
(1 kHz 30% mod)
H Screen ground, cable to audio unit Ulow -
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