2004 Volvo XC90 Base, FWDFACTORY OEM SERVICE PROCEDURE

Audio Control Module (Cable Between The Audio Module And The Cd Changer/Navigation Unit)

Fig 1: Identifying Terminals Of Cable Between Audio Module And CD Changer/Navigation Unit
GLL104160Courtesy of VOLVO CARS CORPORATION

Before taking any readings, see CHECKING VOLTAGE / GROUND CONNECTION, MEDIA/INFOTAINMENT .

Control module terminal Breakout box terminal Signal type Ignition on Miscellaneous
E1 #16 Clock signal to audio unit Digital signal -
E2 #17 Signal ground, sound Ulow -
E3 #18 15 supply Ubat -
E4 #19 Data signal to audio unit Digital signal -
E5 #20 Busy signal to audio unit Digital signal -
E6 #21 Left audio channel Alternating current when there is sound to the loudspeaker -
E7 #22 Right audio channel Alternating current when there is sound to the loudspeaker -
E8 #23 Voice guide channel Alternating current when there is sound to the loudspeaker -
H Β  Screen ground, cable to audio unit Ulow -
Factory Service Tools

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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