GEAR 7G2480 - Caterpillar

Use this procedure to troubleshoot the electrical system if the diagnostic code in Table 1 is active.
Table 1
Diagnostic Trouble Codes
J1939 Code and Description Conditions that Generate this Code System Response
631-2 Calibration Module : Erratic, Intermittent, or Incorrect The flash file is for a different engine family or for a different engine application. The engine will not start. Clearing this diagnostic code requires factory passwords. The personality module code must be reset to zero. Flash Programming - Flash programming is a method of programming or updating the flash file in an Electronic Control Module (ECM).Caterpillar Electronic Technician (ET) is used to flash program a file into the memory of the ECM.Note: Customer versions of Cat ET do not have the capability for flash programming. Contact your Caterpillar Dealer for assistance.If you do not have the flash file, use the "Flash File Search" tool on the Service Technician Workbench (STW) to obtain the flash file. Alternatively, use the "Service Software Files" feature on SIS Web to obtain the flash file for your engine. You must have the engine serial number in order to search for the flash file. After locating the correct flash file, download the flash file to your PC. Write down the name of the flash file for future reference.Installing a Flash File
Establish communication between Cat ET and the ECM.
Select "WinFlash" from the "Utilities" menu on Cat ET. Note: If "WinFlash" will not communicate with the ECM, refer to Troubleshooting, "Electronic Service Tool Does Not Communicate".
Program the flash file into the ECM.
Select the engine ECM under the "Detected ECMs".
Press the "Browse" button in order to select the name of the flash file that will be programmed into the ECM.
When the correct flash file is selected, press the "Open" button.
Verify that the "File Values" match the application. If the "File Values" do not match the application, obtain the correct flash file.
When the correct flash file is selected, press the "Begin Flash" button.
Cat ET will indicate when flash programming has been successfully completed.
Start the engine and check for proper operation. Troubleshoot any active diagnostic or event codes. Perform any necessary repairs. "WinFlash" Error Messages
If you receive any error messages during flash programming, click on the "Cancel" button in order to stop the process. Access the information about the "ECM Summary" under the "Information" menu. Ensure that you are programming the ECM with the correct file for your engine.