A4 Quattro Sedan V6-3.0L (AVK) (2002)
Radio/Stereo: Testing and Inspection
Checking Wiring Between Radio And CD Changer
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Switch off the radio.
"Concert II" radio:
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Press the CD button on the radio and switch the radio on at the same time.
"Symphony II" radio:
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Press the "4" button on the radio and switch the radio on at the same time, keeping the ON button pressed in.
All models:
1
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Wiring OK
Indicated on radio display:
"CONNECT"
2
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Wiring not OK
Indicated on radio display:
"NO CDC"
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Check the electrical connection at the CD changer.
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Repeat the wiring test and, if the wiring is not OK, use the wiring diagrams to check the wiring.