Download RoadRelay 4

RoadRelay 4 software calibration is accessible for download in a zip file. The calibration tool install program sets up the correct COM port, data link, and protocol so that a RoadRelay 4 software calibration can be downloaded to RoadRelay 4. 

RoadRelay 4 "A"
RoadRelay 4 "E"


The steps for running the RoadRelay 4 software download are listed below. Note that RoadRelay 5 uses PowerSpec to download its software calibration.

  • Make the proper connections between the PC you are using to download the RoadRelay 4 software and the RoadRelay 4. You can either use the RS-232 data extraction cable (only for 40059XX models of the Roadrelay 4) between the RoadRelay 4 and the PC, or you can use a Cummins INLINE adapter and data link cable interface between the PC and either the J1708/J1587 or J1939 public data link. If you have a 40032XX model of RoadRelay 4, you must use the data link interface option.
  • Turn the vehicle key switch to the "On" position.
  • Check the model number (40059XX or 40032XX) of your RoadRelay 4 (you can find this on the label on the back of the unit) and also check the software bootloader and application versions by pressing key 5 and selecting "Software Version."
  • Download one of the RoadRelay 4 zip files by clicking on the desired link above (the "A" calibration is the standard calibration for RoadRelay 4 and works with all models, while the "E" extended memory calibration is for Portuguese and Italian language support and will work only on 40059XX models).
  • Unzip the calibration file and save it in whatever folder you prefer on your PC.
  • Run the RoadRelay 4 calibration tool executable program.
  • Select the correct PC COM port, data link, and protocol. Choose the calibration file you just downloaded into your preferred folder.
  • Select "Start." The calibration tool utility will now download the latest software calibration into your RoadRelay 4. The RoadRelay 4 will "beep" twice and the display will go blank. It takes approximately 5 minutes to download a calibration over the J1939 data link, while it takes about 25 minutes to download a calibration over the J1587 data link or the RS-232 serial port.
  • After the download has completed, verify that the correct software is now in your RoadRelay 4 by pressing key 5 and selecting "Software Version." The bottom number is the application version and it should match the name of the ".cal" file you just downloaded.
*RoadRelay 4 "A" is the standard calibration for RoadRelay 4 and works with all models, while the "E" extended memory calibration is for Portuguese and Italian language support and will work only on 40059XX models

RoadRelay 4 Calibration Tool
The RoadRelay 4 Calibration Tool utility software download is a typical Windows-based, self-executing installation. The install program sets up the correct COM port, data link, and protocol so that the RoadRelay 4 software calibration can be downloaded to your RoadRelay 4. The steps for running the RoadRelay 4 Calibration Tool software download are listed below. Note that the RoadRelay 5 uses PowerSpec to download its software calibration.

Download the RoadRelay 4 Calibration Tool zip file and follow the instructions below.

  • Unzip the executable file using zip/unzip software.
  • Click on the Windows Start menu and click Run.
  • Click on the Browse button and locate the file you have downloaded.
  • Click the OK button to run the RoadRelay 4 Calibration Tool utility executable program.
  • Follow the instructions on the RoadRelay 4 download page to download the latest software calibration into your RoadRelay 4.

For more detailed instructions, read the RoadRelay 4 calibration tool HelpMe file.