Diagnostic Signal

The Diagnostic Signal is connected to pin 43 of the Motronic control module, the signal is directional OUT only (PIN 43 - OUTPUT ONLY).

The diagnostic signal is used for communication between the Motronic control module (via the white Data Link Connector) and special tool V.A.G. 1551. The signal is also used for Blink Code Output.

Signal Failure

^ When there is a break in the signal wiring (K-wire), the following text appears on the V.A.G. 1551: "control module does not answer".