Checking Cables And Components, Remote Digital Audio Receiver (RDAR)

Fig 1: Identifying Ignition On Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Checking fuses

Check that the fuse for the function in question is intact.

Replace the fuse if it is damaged.

Checking the cause of the fault

Check the cause of the fault as follows:

Ignition off
Disconnect the MOST connector from Remote Digital Audio Receiver (RDAR).
Connect the MOST cable to special tool 9512867 .
Ignition on
Activate the infotainment system.
Check that MOST network communication is in working order. Do this by obtaining a status reading of the MOST locked parameter for at least 30 seconds. This parameter shows whether the MOST network is closed and communication possible. Click on the VCT2000 symbol to obtain a MOST network status reading.
If the parameter shows that the MOST network is not closed, check the receiving control module in the same way as described above.

The communication on the MOST network is working if the menu text is displayed. The cause of the fault is then in the Remote Digital Audio Receiver (RDAR). Continue the fault-tracing by checking the component.

If menu text is not displayed, communication on the MOST network is not OK. The cause of the fault then lies in the next control module. Continue fault tracing by checking the fiberoptic cable.

Checking the cable

Inspect the MOST connection for dirt, loose contacts and damage.
If no fault can be found in the MOST connection, change the MOST cable.

Checking the component

Check the power supply and ground connection for the Remote Digital Audio Receiver (RDAR).
Inspect the MOST connection for dirt, loose contacts and damage.
If no fault is found, replace the Remote Digital Audio Receiver (RDAR).

Remedy as necessary.

Other information

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

Courtesy of VOLVO CARS OF NORTH AMERICA.

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See: VERIFICATION