Hardware / interface Unverified

DPA5

Also known as Dearborn DPA5, Dearborn Protocol Adapter 5 and DPA 5

Heavy-duty RP1210 and J2534 interface for trucks, buses and engines, used with OEM software such as Cummins INSITE and Cat ET.

Independent community profile — not affiliated with the manufacturer.

About DPA5

The Dearborn Protocol Adapter 5 was designed by DG Technologies (Dearborn Group) and is a widely used heavy-duty vehicle interface. Low-cost copies are also sold, often bundled with a specific OEM program.

Supported vehicles

  • Heavy- and medium-duty trucks, buses and engines on J1939 and J1708/J1587, plus CAN, J1850 and ISO 15765 over J2534.

Works with (genuine DPA5, per DG Technologies)

  • Allison DOC, Bendix ACOM, Caterpillar Electronic Technician, Cummins INSITE and other RP1210 software.
  • DG Technologies states that John Deere, Kubota and CNH (Case/New Holland) software is not supported by the Dearborn adapter. Copies sold "for CNH" rely on unofficial setups.

Strengths

  • An industry-standard RP1210 adapter, supported by many OEM programs.
  • Comes with DG Diagnostics for basic fault and parameter reading.

Limitations

  • The OEM software and its licences are separate.
  • Copied units may not work with all programs, and some only run on old Windows versions.
  • DG Technologies now sells the DPA XL as the successor.

OBD4 does not provide software, licences or downloads.

Capabilities & coverage

Key capabilities

  • Live data
  • Read & clear fault codes

Compatibility note: coverage listed here is a summary of community-submitted information that staff have not yet reviewed. It is not a guarantee for a specific vehicle, model year or software version. Always check the manufacturer's documentation.

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