Auxiliary Input / Output Jack: Testing and Inspection

USB Connector, Troubleshooting

Special tools, testers and auxiliary items required

• Vehicle Diagnosis, Testing & Information System (VAS5051B)

• Diagnostic adapter cable (VAS 5051/5a) or (VAS 5051/6a) or (VAS 5052/3)

• Select "Test Instruments" in Diagnostic Operation System (VAS 5051) or Vehicle Diagnosis and Service System (VAS 5052).

Procedure for troubleshooting

The USB connection is not capable of On Board Diagnostics (OBD).

If signal transmission to radio/radio-navigation system is not functioning, then the voltage supply at harness connector can be checked.

Test Prerequisites

• Beforehand, make sure that USB drive or MP3 player itself does not factor as a malfunction source. Refer to the Owner's Manual.

• Check that the fuse is OK.

• Check radio/radio-navigation system is free of malfunctions via On Board Diagnostic (OBD).

Proceed as follows

- Remove storage compartment with installed USB connection. Refer to => [ USB Connector ] USB Connector.

- Disconnect electrical connection on bottom of storage compartment.

- Measure the following voltages on the wiring harness connector using the (VAS5051B) :

• at 12-pin harness connector T12, at voltage supply terminal 6, positive, with radio switched on.

• at 12-pin harness connector T12, at voltage supply terminal 8, positive, control wire, with radio switched on.

• at 12-pin harness connector T12, at terminal 3 voltage supply terminal 31, negative

If the voltage values specified cannot be measured, then repair wire connections according to wiring diagram.

If no faults can be detected, replace storage compartment with USB connection.