| Testing databus (CAN bus) |
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| Use the relevant current flow diagrams to determine which control units have been connected to the data bus drive (CAN bus, Controller Area Network) |
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| Check tight fit of the plug connections of all connected control units. |
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| Connect vehicle system tester -V.A.G 1552- and select function 00 “Automatic test sequence”. |
| Before testing the communication cable check whether there are no functional faults in the connected control units. |
| Special tools, test equipment as well as aids required |
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| Test box -V.A.G 1598/21- |
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| Handheld multimeter, e.g. -V.A.G 1526 A- |
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| Measuring tool set, e.g. -V.A.G 1594 A- |
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| Self-diagnosis has determined a fault in the data bus. |
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