LINK GP-STB 4Z8781 - Caterpillar

the following procedure to flash program the ECM. The ECM is flashed to upgrade the software. Flash programming of the ECM must also be done if the ECM has been replaced. The Caterpillar ® Electronic Technician (Cat ® ET) service tool contains the program WinFlash. WinFlash is used to load software into the ECM. The following procedure is used to flash software into the MSS3s ECM.Procedure
Connect the data-link cable between the communication adaptor and the Cat ® ET service tool.
Connect the data-link cable between the communication adaptor and the diagnostic connector of the machine.
Use WinFlash to load the software.