DPA Products:

- DPA 5 Dual-CAN
- DPA 4 Plus
- Embedded DPA
- Industrial DPA
- DPA On-A-Chip
- PLC TestCon
- HD Breakout Box
- OBDII Breakout Box

DPA 4 Plus Datasheet

DG Diagnostics

OEM Compatibility


Related Product(s)

DPA 4 Plus Downloads


 Dearborn Protocol Adapter 4 Plus (DPA 4 Plus)

Dearborn Protocol Adapter (DPA 4 Plus)
USB RP1210 A/B/C Compliant

DPA 4 Plus

NSN: 6625015885217
Cage Code: 1J1T6  
NAICS Code: 334515

  • The DPA 4 Plus is the most rugged RP1210 Vehicle Datalink Adapter available.
  • Comes with a 2-year warranty with purchase options for up to 4-years.
  • Patented screw-in USB cable keeps you from constantly repairing/replacing your adapter.
  • Supports most OEM RP1210 diagnostic/reflashing applications.
  • Includes DG Diagnostics, a free heavy-duty diagnostic software package!

The DPA 4 Plus is the fastest, most rugged, most reliable, and the most versatile RP1210 compliant Vehicle Datalink Adapter (VDA) on the market.

The DPA 4 Plus is a One-Tool-Solution, supporting all of your favorite OEM and component diagnostic applications. So why purchase multiple adapters, when the DPA 4 Plus is all you need?

From inception to deployment, the DPA 4 Plus was built for speed-critical applications such as End-Of-Line (EOL) programming stations and the re-flashing of Electronic Control Units/Modules (ECUs/ECMs). In fact, the DPA family of products is consistently faster than the other leading adapters in an "apples-to-apples" benchmarking comparison. This means significantly reduced reprogramming and diagnostic sessions, leading to a fast return on investment (ROI)...

Not only is the DPA 4 Plus a great product, but our warranty, support, and service are second-to-none.

  • The DPA 4 Plus comes with a two-year limited warranty.
  • The DPA is manufactured in an ISO 9001 certified facility.
  • Our technical support team has years of industry experience to help you get the most from your investment.
  • Should a tool need to be returned to the factory, the RMA repair process is simple, and turnaround is generally same-day.

This combination of speed and reliability is why the U.S. Military has chosen it to be the protocol adapter for all wheeled vehicles in their fleet.

You Asked for "Out-of-the-Box" Functionality and we Delivered - DG Diagnostics!

Our customers have been asking for a simple diagnostics application that will work with their DPA "right-out-of-the-box" to display faults, component information and basic vehicle parameters from the J1708/J1587 and CAN/J1939 data buses. DG Technologies has answered the call and is providing these features in an application called "DG Diagnostics".

DG Diagnostics is a great screening/triage tool and is provided free-of-charge with the purchase of any DPA product. DG Diagnostics works with all DPA adapters past and present, and may reduce your need to purchase full-featured OEM software.

Take your DPA straight from the box and start generating ROI with some of these features:
  • Read and display J1587 and J1939 faults in "text" form. Request clear of inactive J1587 and J1939 faults.
  • Display "total-vehicle" and "trip data" such as odometer, engine hours, and fuel economy from the J1587 and J1939 data buses.
  • Create a viewable/printable/saveable vehicle report in HTML format showing all information that has been captured.
  • Display common "dashboard" parameters such as RPM, temperatures and pressures from the J1587 and J1939 data buses.
  • Request reset of J1939 trip information (trip odometer, trip miles, trip fuel, etc).
  • Display J1587 and J1939 ECM component information such as VIN, Make, Model, Serial, and Unit Numbers.
  • Record data bus data for engineering analysis as well as play that data back internally through the program or externally to the data bus.
  • Configure and launch OEM applications directly without having to navigate through the Windows Start Menu.

Below are images showing some of the functionality within the DG Diagnostics application.

Fault Codes Screen

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Component Information Screen

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Total Truck Data

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Dynamic Truck Data

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Configure OEM Applications

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Connect/Disconnect "Home" Screen

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Truck Data Report

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DG Diagnostics is in it's infancy with new and exciting features planned for future releases! If you would like to see something in DG Diagnostics that has not been implemented, please drop us a line at techsupp@dgtech.com with your request.

DPA 4 Plus Supported Protocols and Standards

From light-duty through heavy-duty, the DPA 4 Plus supports your entire fleet! The DPA 4 Plus provides more protocol, standards, and operating system support than any other commercially available diagnostic adapter. Support and standards include:

RP1210 Protocols

Operating Systems


Other Protocols

  • J1939
  • J1708 / J1587
  • CAN
  • Windows Vista
  • Windows 7 32/64-bit
  • Windows 8 32/64-bit
  • TMC RP1210A
  • VEPS J2214 / J2461
  • CE Compliant
  • J2284 (CAN @500k)
  • J2411 (GM SWCAN)
  • J1850 VPW
  • ALDL

DPA 4 Plus OEM Diagnostic Software Compatibility

The DPA 4 Plus is RP1210A compliant and should work with any RP1210A compliant application. It has been thoroughly validated against the following OEM and component applications:

  • Allison DOC
  • Bendix ACOM
  • Caterpillar Electronic Technician
  • Cummins Insite
  • Dana Diagnostic Tool
  • Detroit Diesel Diagnostic Link
  • Detroit Diesel Reprogramming Station
  • Eaton ServiceRanger
  • Freightliner ServiceLink
  • International Diamond Logic Builder
  • International InTune
  • International Master Diagnostics
  • International ServiceMaxx
  • Mack VCADS/PTT
  • Meritor-WABCO Toolbox
  • Perkins EST
  • Vansco VMMS
  • Volvo VCADS/PTT
  • ZF-Meritor TransSoft

If you have a question about an RP1210A-compliant application that is not listed, do not hesitate to contact our technical support department.

DPA 4 Plus and DG Diagnostics Instructional Videos

PC Requirements

The following are the PC requirements to use the DPA 4 Plus.

  • IBM-Compatible, 1GHz or faster
  • 256MB RAM (512MB Preferred)
  • 25 MB Free Hard-Disk Space
  • USB Port, USB Version 1.1 or Higher
  • Computer Administrator Priviledges


All DPA 4 Plus downloads, such as drivers and product literature can be found on our DPA 4 Plus product downloads page.

Contact Information

For pricing and other general product information as well as technical support, call or e-mail:

    	Phone:		(248) 888-2000
    	Fax:		(248) 888-9977
    	Sales:		sales@dgtech.com
    	Support:	techsupp@dgtech.com

Standard Product Part Numbers and List Pricing

The following are the part numbers for the DPA 4 Plus standard products.

DPA 4 Plus Kit

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The DPA 4 Plus kit comes in a ruggedized, lockable plastic box and contains:

  • DG-J1939-04-CABLE (J1939 Type II)
  • Plastic Carrying Case
  • QuickStart Guide
  • Drivers CD
DPA 4 Plus Kit Combined With PLC TestCon Kit
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PLC4TRUCKS (PLC) Protocol Support

This kit contains all elements of the DG-DPA4/PLUS-KIT, as well as the DG-DPA-PLC-KIT (see below).

Value Adding Maintenance Agreement

Protect your investment. Add an additional year of warranty following the standard 2 year warranty period.


Extend your DPA warranty to 4 years with a second additional warranty year.

An extended warranty may be purchased at any time within the standard warranty two year period, or as long as any extended warranty is in effect, for a total of up to 4 years of coverage from the initial date of purchase.

DPA 4 Plus Accessories and List Pricing

The following are acccessories that can be purchased for use with the DPA 4 Plus.

Part Number/List Price Image Description

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  • Connects DPA 4 Plus to the Deutsch 9-pin or 6-pin heavy/medium-duty vehicle connector.
  • Comes standard with DPA 4 Plus kit.
  • J1939 Type II

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  • Connect your DPA 4 Plus to Medium/Light Duty vehicles with an OBDII (J1962) port.

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  • Open ended OBDII cable.

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  • Allows DPA to be connected to CAT industrial equipment.
  • For All Caterpillar Engine Models
  • 9 pin adapter cable.
  • Supports J1708/J1587/ATA and J1939 Databuses

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  • Allows connecting directly to the J1939 triangular Deutsch connector.
  • To provide a 12V power source to the DPA you can either use the Weather Pack mating connector (PN: 12010973) or you can cut the existing WeatherPack connector off and wire directly to the power source.

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  • USB Cable with gold plated connectors.
  • Thumb screws secure cable to DPA product.
  • Comes standard with DPA 4 Plus kit.

  • Connects DPA 4 Plus to Volvo Construction Equipment with the 14-pin round connector.

  • Connects DPA 4 Plus to Volvo
  • Construction Equipment with the 8-pin rectangle connector.

  • Connects DPA 4 Plus to Komatsu
  • Construction Equipment with the 12-pin rectangle connector.

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  • 9/15/25-pin DB Connector Signal Breakout Box
  • Male (top) and Female (bottom) to Banana Plug connections.
  • Contains 6 pigtails for connection flexibility.
  • Straight through connections (1-1, 15-15, 25-25).
  • For more information, click "Here".

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  • Two J1962 Female (Car-Side) Connectors.
  • One J1962 Male Connector on a 3' extension cable.
  • All 16 pins broken out to Banana Plug connections.
  • For more information, click Here

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The PLC TestCon kit quickly tests the Trailer ABS and the in-cab Trailer ABS Fault Lamp without needing PC-based diagnostics. It also converts PLC4TRUCKS to J1708 so when coupled with a DPA you can run PLC-based Trailer ABS diagnostics applications, such as those from Meritor-WABCO, Bendix, Haldex, and Wabash National. You can Learn More About the PLC TestCon Here

The kit includes:

U.S. Patents that apply to our DPA Product line:

6,772,248: Protocol adapter for in-vehicle networks (8-3-04)
7,152,133: Expanded functionality protocol adapter for in-vehicle networks (12-19-06)
7,337,245: Protocol Adapter for Passing Diagnostic Messages between Vehicle Networks and a Host Computer (2-26-08)
7,725,630: Protocol adapter for passing diagnostic messages between a host computer and vehicle networks operating in a J1939 or J1708 protocol (5-25-10)
8,032,668: Protocol adapter for passing diagnostic messages between a host computer and vehicle networks operating in J1939 or J1708 protocol (10-4-11)
8,255,587: Protocol adapter for passing diagnostic messages between a host computer and vehicle networks operating in J1939 or J1708 protocol (8-28-12)