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Factory Passwords
Factory Level Security Passwords are required to clear certain logged events or change certain parameters. When the correct passwords have been entered, the changes will be programmed in the ECM.The Electronic Service Tool Factory Passwords Screen will display ECM Serial Number, Engine Serial Number, Electronic Service Tool Serial Number, a Reason Code, and Total Tattletales (refer to Figure 2.1). This information must be given to an authorized Caterpillar dealer to obtain the proper passwords. The passwords are controlled by Caterpillar Inc. and may only be obtained by an authorized Caterpillar dealer. Examples of the Electronic Service Tool Screens are shown in this section. The passwords are only good for one programming or clearing session. A different set of passwords will be required if the Electronic Service Tool Screen is exited before clearing ALL events or programming ALL parameters.Electronic Technician (ET)
For details on how to read and change parameters using ET, Communication Adapter Tool and the appropriate software, refer to the instructions included with the JERD2129 or JERD2142 ET Data Subscription and the JERD2124 ET Software.Electronic Control Analyzer Programmer (ECAP)
For details on how to read and change parameters using ECAP, Communication Adapter Tool and the appropriate Service Program Module, refer to Tool Operating Manual SEHS9343, Using The ECAP NEXG4521 Machine Functions Service Program Module and Special Instruction SEHS9264. The ECAP may not be able to access all available parameters.Flash Downloading
Software inside the ECM is contained in a Personality Module (FLASH memory chip). FLASH is a memory technology used in the latest Caterpillar Electronic Control Modules. ET has the ability to FLASH download (reprogram) the Personality Module.FLASH downloading is required to update the software. Some machine ECM's have a removable Personality Module. The ECM Personality Module cannot be removed so FLASH downloading is the only means available to update the Personality Module. The Service Replacement ECM may have a removable cover but the Personality Module can not be removed. Do not remove the cover under any circumstance.FLASH downloading is accomplished by connecting ET to the engine through the Communication Adapter Tool and transferring data from a computer running ET to the ECM. See the instructions included with the JERD2124 ET software and the JERD2129 ET Data Subscription for more information.ECM Internal Failure Diagnostic (254-12)
The ECM continuously monitors itself internally for problems. If an internal problem develops, the Diagnostic Code 254-12 becomes Active. This indicates that the ECM has detected an internal power supply or memory problem that cannot be fixed. The ECM must be replaced. Refer to Replacing The Electronic Control Module.Set Injector Codes
This function is used to read/enter the numeric 4-digit code stamped on each injector. The Electronic Service Tool will display a list of the codes currently in use. When installing or replacing injectors, ensure that the correct value for each injector is entered. When replacing an ECM record the injector codes or use ET Copy Configuration so that they may be entered into the new ECM.System Configuration Parameters (268-02)
System Configuration Parameters are the parameters that affect emissions, power rating of the engine, or various features. They are usually programmed at the factory and in most cases never need to be changed. System Configuration Parameters must be reprogrammed if an ECM is replaced, but not if the Personality Module is replaced (unless the engine rating changes). Proper values for these parameters are available on an Electronic Service Tool (refer to Figure 2.2). Certain parameters are also stamped on the engine information plate. Changing System Configuration Parameters that are protected by factory passwords may void Caterpillar warranty.Engine Serial Number
The Engine Serial Number should