BELT-SERPENTINE 2115022 - Caterpillar

Certain parameters that affect 3176 Engine operation may be changed through electronic service tools. The parameters are stored in the ECM, NOT the personality module. Any parameter can be read, but passwords protect parameters from unauthorized changes.The parameters fall into two catagories: System Configuration Parameters, and Customer Specified Parameters. System Configuration Parameters can be changed using an ECAP only with the proper factory passwords. Customer Specified Parameters can be changed using an ECAP or DDT only with the proper customer passwords. See the following section on passwords for more details on how to get and use passwords.For details on how to read and change parameters using an ECAP refer to Special Instruction Form No. SEHS8886 if using the NEXG4522 Truck Engine Functions Dual Service Program Module. For the DDT refer to Special Instruction Form No. SEHS8808 Using NEXG4509 3176 Truck Functions DDT Service Program Module.Connecting ECAP or DDT to 3176
1This is a subscription, since it is anticipated that it will be changing at regular intervals.The Electronic Control Analyzer Programmer (ECAP) and Digital Diagnostic Tool (DDT) are powered by the 12 volts DC from the vehicle battery. This permits operation beside the engine or in the cab of a truck, which allows taking readings during vehicle operation. Use the following procedures to connect the service tool to the engine:A. Turn KEY OFF.B. The ECAP or DDT may be connected to the 3176 system at J8, the 9-pin Engine Data Link Connector, or at the Dash Data Link connector. Only one side of the "T" harness connector cable is used. Remove the cap on J8 and replace once testing has been completed. Dash Data Link Connectors may be either an 8-pin CPC or 6-pin Deutsch. See "Optional 3176 Service Tools" in section 1.0 for available adapters to Caterpillar 9-pin Deutsch Connector.C. Connect the opposite end of the "T" cable to the ECAP or DDT.D. Turn KEY ON to begin testing. The ECAP or DDT will operate with the engine running, or with the engine off, key on. If the ECAP or DDT does not communicate with the 3176, refer to P-320: ECAP/DDT Will Not Communicate With 3176 System. The ECAP/DDT may restart during engine cranking due to voltage drop.System Configuration Parameters
System Configuration Parameters are those that affect emissions or horsepower of the engine. They are programmed at the factory and would normally never need to be changed through the life of the engine. Proper values for these parameters are stamped on the engine information ratings plate located on the valve cover or intake manifold. Factory Passwords are required to change these parameters. illustration 1 on page 27 is an example of the ECAP screen displaying System Configuration Parameters. The following is a brief description of the System Configuration Parameters:Full Load Setting:
Number representing fuel system adjustment made at the factory to "fine tune" the fuel system. Correct value for this parameter is stamped on the engine information ratings plate.Full Torque Setting:
Similar to Full Load Setting.Personality Module Code:
Code which prevents use