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CD-ROM Changer (To RTI Control Module)

Fig 1: Audio Control Module (Cable Between Audio Module & Amplifier)
GLL104157Courtesy of VOLVO CARS OF NORTH AMERICA.

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

CD-ROM changer terminals L1-L6 correspond to #26-#31 on the breakout box.

Control module terminal  Breakout box terminal Signal type  Ignition on  Other 
L1 #26 Clock signal from the CD-ROM changer Digital signal Melbus protocol
L2 #27 Data signal from CD-ROM changer Digital signal Melbus protocol
L3 #28 - - -
L4 #29 Busy signal from the CD-ROM changer Digital signal Melbus protocol
L5 #30 15 supply Ubat -
L6 #31 - - -
H Screen ground, cable to CD-ROM changer Ulow - -