| The central control unit for convenience system -J393- is located in the dash panel. It is equipped with a fault memory. The connection for the self-diagnosis is located below the storage compartment under the steering column. |
| The control unit detects faults and malfunctions in the convenience system and stores them in the permanent memory. |
| Initiate self-diagnosis at the start of fault finding and retrieve the stored information using the vehicle system tester -V.A.G 1552- oder -V.A.G 1551-. |
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| The following description applies for the vehicle system tester -V.A.G 1552- used with the program card 6.0. |
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| The use of vehicle diagnosis, measurement and information system V.A.S 5051 or fault read-out scan tool -V.A.G 1551- with program card 9.0 is almost identical except for specific deviations (e.g. other display, possibility of using a printer etc). |
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| To end the diagnosis or to switch to another address word select function 06 „End output“. |
| The displayed fault messages refer to a fault table including indications on the possible causes as well as targeted repairs. |
| Faults due to a temporary line interruption or loose contact are also stored. These faults are displayed as sporadic faults „SP“. |
| The optical Safe function indicator is a LED mounted in the lock button of the driver's door. |
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