3412 (PEEC) INDUSTRIAL ENGINE ELECTRONIC TROUBLESHOOTING Caterpillar

Programming PEEC Parameters

Usage:

Certain parameters that affect PEEC 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 categories: System Configuration Parameters and Customer Parameters. System Configuration Parameters can be changed only with the proper factory passwords, and Customer 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. SEHS9199, Using the NEXG4516 PEEC Functions Service Program Module.

Connecting ECAP To PEEC System:

The Electronic Control Analyzer and Programmer (ECAP) is powered by the 12 volts DC from the 24/12VDC Converter, through the Electronic Speed Switch (ESS).

Use the following procedures to connect the service tool to the engine:

A. Turn power switch(es) OFF.

B. At the Electronic Control Module (ECM), locate the 9-pin connector J1/P1 (diagnostic connector), out of the top of the ECM. Remove P1 from J1 and install the 8T5275 Diagnostic Connector Cable ("T") between P1 and J1.

C. Connect the other end of the "T" cable to the ECAP at Port 1.

D. Turn power switch(es) ON to begin testing. The ECAP will operate with the engine running or with the engine OFF, power switch(es) ON. If the ECAP does not communicate with PEEC, refer to P-120: ECAP Will Not Communicate with PEEC.

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 plate located on the valve cover. Factory passwords are required to change these parameters. Updating a Personality Module in the same family does NOT require Factory Passwords.

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 (Check Customer Or System Parameters) will be generated and the engine will only idle. When rerating the engine or installing a new ECM, programming this code to 0 will prompt the ECM to read and match its stored code to the personality module. Note that this code DOES NOT need to be programmed when a personality module is replaced, as long as the new module is of the same family. If the module is of a different family, the engine is in effect being rerated-pistons, nozzles, turbocharger, etc. may also need to be changed and the engine information plate should also be changed to reflect the rerate.

Engine Serial Number:

Should be programmed to match the engine serial number stamped on the engine information plate.

NOTE: A new ECM is delivered with the engine serial number programmed to 0XX00000.

Customer Specified Parameters

Customer parameters allow a customer to set Low Idle RPM, Top Engine Limit and System ID number.

For detailed instructions on how to program PEEC for optimum performance and fuel economy, refer to LEKT8467, Specing For Peak Performance.

Customer parameters may be changed repeatedly as a customer changes his operation. Customer passwords are required to change these parameters.

The following is a brief description of the Customer Specified Parameters. Along with each are the minimum and maximum values, for the parameter, and the default value that the parameter should be programmed to if the feature is not used.

Engine Parameters

Top Engine Limit (TEL):

Maximum engine rpm when the engine is under load. PEEC will still achieve Rated RPM under no load.

Minimum ... Rated rpm - 79 rpm

Maximum ... Rated rpm + 20 rpm

Default ... Rated rpm + 20 rpm

Low Idle RPM:

Minimum engine rpm (programmable between 600 and 750 rpm).

System ID:

Permits the owner to enter his own identifying number.

Entering Passwords

Factory Passwords

Factory passwords are required to perform any one of these four functions:

1. Program a new ECM.

When an ECM is replaced, the System Configuration Parameters must be programmed into the new ECM. These parameters are protected by factory passwords.

2. Rerate the engine to another engine family.

This requires changing the Personality Module Code, which is protected by factory passwords.

3. Read customer passwords.

If the owner forgets his customer passwords, he will not be able to program customer parameters. Using factory passwords, one can read customer passwords, then use those customer passwords to program customer parameters.

4. Clear certain diagnostic codes.

Only Diagnostic Code 48 (Excessive Engine Power) requires factory passwords to clear once it is LOGGED. Clearing certain other codes require customer passwords. The majority of LOGGED diagnostic codes require no passwords to clear.

Factory passwords are controlled by Caterpillar, and may only be obtained by authorized Caterpillar Dealers.

NOTE: Since factory passwords contain alphabetic characters, only the ECAP may perform these functions

To obtain factory passwords, proceed as if you already had the password. At some point, if factory passwords are truly needed, the ECAP will request factory passwords and will provide most of the information required to obtain the password on the ECAP screen.

Customer Passwords

Customer passwords are required to change ANY customer parameter. Customer Specified Parameters are those that affect low idle speed, Top Engine Limit (TEL) and System ID Number.

To obtain customer passwords, contact the owner of the engine. If the owner has forgotten his passwords, customer passwords may be read using an ECAP by following these steps:

1. If the customer has lost or forgotten his passwords, use the ECAP to access "Read/Change System Configuration Parameters", then "Read Customer Passwords".

2. When the Factory Passwords screen appears, record the information listed on the "PEEC Factory Worksheet" (in this section).

NOTE: Leave the ECAP on this screen.

3. Obtain the Factory Passwords. The information recorded above must be provided, and generates a permanent record at Caterpillar of the access.

4. From the Factory Passwords screen, enter the Factory Passwords.

5. When the "Read Customer Passwords" screen appears, record the Customer Passwords. The Customer Passwords may then be used to change Customer Parameters.

Programming New Electronic Control Modules

Be aware that replacing the ECM is somewhat time consuming, and that good ECMs are often replaced in a last ditch effort to fix a problem.

Use the proper procedure in this manual to find the real root cause of the problem. Be sure that you will really be fixing the customer's problem before replacing the ECM.

The following procedure is a summary of the basic steps necessary to program a replacement ECM.

Step 1:

Use the "PEEC Customer Specified Parameters Worksheet" (in this section), to record the customer parameters from the ECM being replaced.

A. Obtain and record the Customer Passwords. If the customer (owner) has lost or forgotten his passwords, go to "Customer Passwords" in this section.

B. Use the ECAP to access "Read Customer Specified Parameters" from the ECM being replaced.

C. Record the Customer Specified Parameters listed on the worksheet.

Step 2:

Replace the faulty ECM.

Step 3:

Use the "PEEC Factory Passwords Worksheet" (in this section), to obtain the factory passwords.

A. Record the following information from the engine information plate:

* Full Load Setting

* Full Torque Setting

* Engine Serial Number

B. Record the engine hours.

C. Connect the ECAP. When first powered up, the ECAP will display its serial number while going through its self tests. Read and record the ECAP Serial Number.

D. Use the ECAP to access "Read/Change System Configuration Parameters" from the new ECM.

E. When the Factory Specified Passwords screen appears, record the following information:

* ECM Serial Number

* Engine Serial Number (should read 0XX00000).

* Total Tattletales

NOTE: Leave the ECAP on this screen.

F. Obtain the Factory Passwords. The information recorded above must be provided.

Step 4:

Program the PEEC System Configuration Parameters

A. From the Factory Specified Passwords screen, enter the Factory Passwords.

B. When the "Read/Change System Configuration Parameters" screen appears, enter the Full Load Setting, Full Torque Setting And Engine Serial Number recorded on the worksheet. Program the Personality Module Code to 0 before leaving this screen.

Step 5:

Program the Customer Specified Parameters.

A. Use the ECAP to access "Read/Change Customer Specified Parameters".

B. Enter the Customer Specified Parameters recorded in Step 1 and the original Customer Passwords.

NOTE: If the Customer Specified Parameters are entered before the System Configuration Parameters, the Total Tattletales will change. It will then be necessary to obtain another set of Factory Passwords to access "Read/Change System Configuration Parameters".

Step 6:

Use the ECAP to access "Calibrate Sensors", and calibrate the boost sensor.

Programming New Personality Modules

When updating to a newer version of Personality Module, there is no need for factory passwords to change System Configuration Parameters. Customer passwords are also typically not needed (though may be needed if the new module introduces new features that involve additional customer parameters.