HARNESS AS-LIGHTING 3843506 - Caterpillar

Operating the engine with a flash file not designed for that engine will damage the engine. Be sure the flash file is correct for your engine.
Note: Factory passwords are provided only to Caterpillar dealers.Factory passwords are required to perform each of the following functions:
Program a new Electronic Control Module (ECM). When an ECM is replaced, the system configuration parameters must be programmed into the new ECM. A new ECM will allow these parameters to be programmed once without factory passwords. After the initial programming, some parameters are protected by factory passwords.
Clear event codes. Most event codes require the use of factory passwords to clear the code once the code has been logged. Clear these codes only when you are certain that the problem has been corrected.
Unlock parameters. Factory passwords are required in order to unlock certain system configuration parameters. Refer to Troubleshooting, "System Configuration Parameters".Since factory passwords contain alphabetic characters, the Caterpillar Electronic Technician (ET) must be used to perform these functions. In order to obtain factory passwords, proceed as if you already have the password. If factory passwords are needed, Cat ET will request the factory passwords and Cat ET will display the information that is required to obtain the passwords. For the worksheet that is used for acquiring factory passwords, refer to programming parameters Troubleshooting, "Factory Passwords Worksheet".