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Av Control Unit

AV control unit is installed at the center of the instrument panel.

Fig 1: Identifying AV Control Unit
Courtesy of NISSAN NORTH AMERICA, INC.
It is connected to TCU with the USB harness and signals necessary for Telematics function is sent and received.
Switch operation signals used for the Telematics system are transmitted to TCU via USB communication from the AV control unit.