Golf III L4-2.0L (ABA) (1995)
Data Link Connector: Description and Operation
Exciter Wire Signal
The Exciter Wire Signal is connected to pin 21 of the Motronic control module, the signal is directional IN only (PIN 21 - INPUT ONLY).
The exciter wire signal is used for activation of rapid data download (Diagnostic Trouble Code extraction) via the white Data Link Connector (L-wire).
Signal Failure
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When there is a break in the signal wiring (L-wire), the following text appears on the V.A.G. 1551: "control module does not answer".