FILTER-NX AIR 2437621 - Caterpillar

This diagnostic code is recorded when the Drivetrain ECM is communicating with the Engine ECM on the J1939 CAN A Data Link, however, the Drivetrain ECM is not receiving certain parameter information that is expected from the Engine ECM. Some conditions that can cause this diagnostic code are listed below:
The software that is installed on the Engine ECM is incorrect.
The software that is installed on the Drivetrain ECM is incorrect.
A new ECM has been installed that is not the correct part.Test Step 1. VERIFY THE HARDWARE AND THE SOFTWARE PART NUMBERS
Verify that the following information is correct:
The part number of the installed software of the Drivetrain ECM
The part number of the installed software of the Engine ECM
The part number of the Drivetrain ECM
The part number of the Engine ECM Note: Contact your dealerships Technical Communicator for the correct part numbers of the hardware and the correct part numbers for the configuration software. Expected Result:All hardware and software part numbers are correct. Results:
OK - All hardware and software part numbers are correct. Proceed to Test Step 2.
NOT OK - All hardware and software part numbers are NOT correct. Repair: Replace the hardware or software that is incorrect with the correct version. Ensure that you have the latest version of software for your specific machine and ECM. Ensure that the software is from the same release as the software that is