Equus 3022 Tester Manual Updated Jun 2026

If the display fades, replace the internal 9-volt battery by removing the screws on the back case.

Select the "RPM" function on the 3022 to view engine speed on the LCD. equus 3022 tester manual

Each vehicle manufacturer uses different pins on the Data Link Connector (DLC) to transmit codes. For example, retrieving codes from a 1990 Ford F-150 requires jumping two pins with a wire, while a 1992 Honda Civic requires counting the flashes of an LED. The manual provides: If the display fades, replace the internal 9-volt