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Self-diagnosis of Motronic system
Technical data of self-diagnosis
Equipped with
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◆ The data transfer between control unit and fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 is carried out in the operating mode "Rapid data transfer".
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◆ The fault memory is equipped with a non-volatile memory and therefore does not depend on the power supply.
Control unit identification
The control unit version is displayed when fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 is connected and the engine control unit is selected .
Selectable functions when using the fault reader V.A.G 1551 or V.A.G 1552
The prerequisites for selecting the desired functions can be taken from the following table.
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Fault reader
V.A.G 1551 or V.A.G 1552
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Ignition on,
engine not
running
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Engine idling
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Vehicle being driven
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Page
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Address words
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01
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Engine electronics
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Yes
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Yes
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Yes
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00
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Automatic test sequence
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Yes
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Yes
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Yes
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Functions
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01
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Interrogate control unit version
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Yes
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Yes
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Yes
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01-3
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02
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Interrogate fault memory
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No
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Yes
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Yes
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01-7
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03
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Final control diagnosis
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No
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Yes
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No
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01-79
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04
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Basic setting
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No
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Yes
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Yes
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01-86
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05
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Erase fault memory
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Yes
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Yes
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Yes
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01-7
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06
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End output
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Yes
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Yes
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Yes
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01-7
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07
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Code control unit
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Yes
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No
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No
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01-90
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08
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Read measured value block
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Yes
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Yes
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Yes
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01-94
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