Displaying DTC blink codes

WARNING: This page is about a different car, the 1995 Volkswagen Jetta III, 1995 Volkswagen GTI, and 1994 Volkswagen Jetta III. However, it is still accessible from the selected car via links, so may be relevant.

Switch ignition ON.
Connect OBD1 adapter to Data Link Connector (DLC) for 2.5 seconds, then disconnect.

First blink code will be displayed

NOTE: The code 4-4-4-4 indicates no malfunctions stored.

Connect OBD1 adapter again for 2.5 seconds, then disconnect.
- Next blink code will be displayed
Repeat procedure, connecting and disconnecting adapter and reading additional blink codes, until no more codes are displayed (0-0-0-0).
Switch ignition OFF.