The Nissan OBD1 system uses a proprietary , often referred to as the Consult-I port, found on most models manufactured between 1989 and 1995. Unlike the standardized 16-pin OBD2 port, these are often located near the fuse box or under the steering column. Nissan 14-Pin OBD1 Pinout Overview
Because Nissan OBD1 uses a relatively simple serial protocol, the DIY community has reverse-engineered the pinout. You can build a for under $15. nissan obd1 pinout
With a simple level shifter (MAX232) or a USB-to-TTL adapter, you can interface with the ECU using free software (e.g., ECUTalk, NDSI, or Consult Viewer). This provides: The Nissan OBD1 system uses a proprietary ,