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Self diagnosis
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.
Interrogating control unit versions
The control unit version is displayed when the fault reader V.A.G 1551 or the vehicle system tester V.A.G 1552 is connected and engine electronics control unit selected
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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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Function
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Prerequisite
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Engine stationary, ignition switched on
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Engine running at idling speed
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02
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Interrogating fault memory
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yes
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yes
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03
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Final control diagnosis
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yes
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no
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04
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Basic setting
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yes1)
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yes2)3)
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05
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Erasing fault memory
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yes
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yes
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06
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Ending output
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yes
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yes
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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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09
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Read individual measured value4)
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yes
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yes
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10
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Adaption
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yes
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no
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1)
Must be carried out after performing the following work:
Replacing control unit, throttle valve control part or engine.
2)
Only possible when the coolant temperature is above 80 °C. Prior to this, this function is blocked.
3)
Must be carried out when checking and adjusting the ignition timing point.
4)
Currently is only used for checks in the factory.
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