| Required special tools, workshop equipment, testers, measuring instruments and auxiliary items |
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| Vehicle diagnostic, testing and information system -VAS 5051- or vehicle diagnostic and service information system -VAS 5052- |
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| Diagnostic cable -VAS 5051/5a- or -VAS 5051/6a- or -VAS 5052/3- |
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| Select the “Test equipment” in vehicle diagnostic, testing and information system -VAS 5051- or vehicle diagnostic and service information system -VAS 5052-. |
| The “iPod player” holder is not capable of self-diagnosis. |
| If signal transmission to the radio or radio navigation system does not function, voltage supply at connector can be checked. |
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| First make sure that the “iPod player” itself is not the source of the fault → Owner's Manual. |
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| Check that the fuse is OK. |
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| Check radio or radio navigation system for faults via self-diagnosis. |
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| Disconnect holder connector beneath storage compartment. |
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| Use vehicle diagnostic, testing and information system -VAS 5051- or vehicle diagnostic and service information system -VAS 5052- to check the following voltages at the wiring harness-side connector. |
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| At connector T12, 12-pin, at terminal 6 voltage supply, positive, with radio unit switched on |
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| At connector T12, 12-pin, at terminal 8 voltage supply, positive, control cable, with radio unit switched on |
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| At connector T12, 12-pin, at terminal 3 voltage supply, terminal 31, negative |
| If the specified voltage values cannot be measured, repair the cable connections referring to current flow diagram. |
| If no fault can be found, renew “iPod player” holder. |
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