volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Reading and Clearing Diagnostic Trouble Codes|Page 7640 > < Reading and Clearing Diagnostic Trouble Codes|Page 7638
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Unclip cover for diagnostic connections under heater/ventilation controls.

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First, connect black connector of V.A.G 1551/1 to black diagnostic connector in vehicle (voltage supply).

Indicated on display:

VAG On Board Diagnostic HELP
1- Rapid data transfer

or

VAG On Board Diagnostic HELP
2- Blink code output

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Displayed alternately.

NOTE:  If display remains blank, do not connect white connector. In this case, check voltage supply for Scan Tool (ST) V.A.G 1551 according to
wiring diagram.

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Connect white connector of Scan Tool (ST) V.A.G 1551 to white Data Link Connector in vehicle. blue connector is not required.

Vehicles 09.94 -->

Test requirements:

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All fuses OK according to wiring diagram.

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Battery voltage at least 9 volts.

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Remove ashtray and slide cover for Data Link Connector (DLC) toward left - arrow -.

Reading and Clearing Diagnostic Trouble Codes|Page 7640 > < Reading and Clearing Diagnostic Trouble Codes|Page 7638