BELT-SERPENTINE 2852943 - Caterpillar

Certain parameters that effect PEEC III 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 only with the proper factory passwords, and Customer Specified Parameters can be changed 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. SEHS9349 if using the NEXG4522 Truck Engine Functions Dual Service Program Module. For the DDT refer to Special Instruction Form No. SEHS8743 if using the NEXG4508 PEEC III Service Program Module.Connecting ECAP or DDT to PEEC III
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 on the ground 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 PEEC III system at J8, the 9 pin, gray plastic, Deutsch brand connector labeled Engine 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.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 PEEC III, refer to P312; ECAP/DDT Will Not Communicate With PEEC III.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. Figure 1. on page 2-6 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 of incorrect personality module for this engine. Each horsepower family and emission certification has a different code associated with it. This code (stored in ECM) MUST match that in the personality module or a Diagnostic Code 56 will be generated and the engine