The 2000 Nissan Frontier, like other Nissan models from 1998-early 2000, features two data link connectors (DLCs). This can cause confusion when using an OBD2 scanner. One connector, a 14-pin DLC located inside the fuse box, is designed for Nissan’s factory “Consult” scan tool. The other, a standard 16-pin OBD2 connector found under the dash, is for generic OBD2 scanners.
A mid-year production change in the 2000 Frontier (around VIN 3xx,xxx) further complicates matters. Early 2000 models often require connection to the 14-pin DLC inside the fuse box, even for OBD2 functions. This is because the under-dash OBD2 connector on these early models might not communicate with all OBD2 scanners in standard OBD2 mode. Scan tools lacking clear instructions regarding this dual DLC setup can lead users to incorrectly assume the under-dash connector will function as expected on all 1998-2000 Frontiers.
Ideally, an OBD2 scanner for a 2000 Nissan Frontier should clearly indicate the need to potentially use the 14-pin DLC for early production models. This information would prevent confusion and ensure proper vehicle diagnostics. When a technician encounters an under-dash DLC, it’s natural to assume it’s the primary communication port, especially in post-1996 vehicles. The presence of the second, less obvious DLC necessitates clear instructions from the scan tool manufacturer. While later 2000 Frontiers and subsequent models typically use the standard OBD2 connector, awareness of this potential issue is crucial for anyone working on these specific Nissan vehicles. Without clear guidance, users may mistakenly believe there’s a vehicle or scanner malfunction when the issue lies in connecting to the correct DLC.
