3512B Oil Well Servicing Engine (ADEM III) Caterpillar

System configuration parameters are parameters that affect emissions, power of the engine, and other features. The parameters are programmed at the factory. In most cases, the parameters do not need to be changed. The system configuration parameters must be reprogrammed if an ECM is replaced and/or the engine rating is reprogrammed. System configuration parameters do not need to be reprogrammed if the flash file is replaced. Proper values for these parameters are available on Caterpillar Electronic Technician (ET). Certain configuration parameters are also stamped on the engine information plate.

Note: Changing the parameters that are protected by factory passwords may cause your Caterpillar warranty to be voided.

Check Programmable Parameters (268-02)

If a programmable parameter has not been programmed, the ECM will activate a 268-02 Check Programmable Parameters. The unprogrammed parameters will be set to default. Certain aspects of the engine's performance and engine monitoring may be affected.

Personality Module Mismatch (253-02)

The ECM stores a code number in permanent memory. This code is called an interlock code that is associated with each flash file. The interlock code does not allow the engine to run if the wrong flash file has been downloaded into the ECM.

Cat ET will warn you if a flash file that does not match the last file in the ECM has been downloaded. The interlock code must be reprogrammed with Cat ET in order to allow the engine to run with new software. For instructions on reprogramming the interlock code, refer to the Special Instruction, SEHS9343. Installing the incorrect flash file into the ECM may void the Caterpillar warranty.

The 3500 ECM and another Caterpillar ECM may appear to be similar, but the electronic control modules are different. These different electronic control modules cannot be interchanged. For example, a 3412E ECM cannot be used to replace a 3500 ECM. The interlock code can not be reset if the wrong ECM is installed. If an incorrect ECM is used, a 253-02 Personality Module Mismatch becomes active. The fuel injection is disabled in order to prevent the engine from starting. Verify the correct ECM part number by checking the part number that is listed in the Parts Manual.

When the engine is rerated, programming the interlock code to zero will prompt the ECM. The ECM will read the stored code and the ECM will match the stored code to the new interlock code.

Engine Serial Number

Program the engine serial number to match the engine information plate. The serial number is not programmed on a new ECM.

Rated Fuel Position

This parameter is used to set engine power. A factory password is required to change this setting.

Low Idle

The parameter defines the lowest rpm level.

Cooldown Speed

This parameter defines the engine speed when the engine is in cooldown mode.

Engine Cooldown Duration

This parameter defines engine operation at the cooldown speed. Programming this parameter to 0 will disable this function.

Engine Prelube Duration

The parameter sets the amount of time for prelubrication. Programming this parameter to 0 will disable this function.

Crank Duration

The crank duration determines the amount of time that the starting motors are energized. Programming this parameter to 0 will prevent the ECM from engaging the starting motors.

Maximum No. Of Cranking Cycles

This parameter is the total number of crank cycles that can be performed before power to the ECM must be cycled.

Crank Terminate Speed

This parameter determines the engine rpm for disengagement of the starting motor.

Air Shutoff

Programming the parameter to "DISABLED" will disable the air shutoff. Program this parameter to "DISABLED" if the function is not being used or if the air shutoff is not installed on this engine. This will prevent air shutoff diagnostics from being logged.

Fuel Ratio Control

The ECM determines the offset value for the Fuel Ratio Control (FRC). The FRC Offset value is used to adjust the fuel ratio control. This minimizes the exhaust smoke when the engine is accelerated.

An offset value of ± 25 kPa (± 4 psi) may be used for adjusting customer preference, fuel quality or other factors that affect engine performance. The default setting is 0.

Note: This parameter may not be available on all applications. This parameter is used in place of the mechanical control for the fuel to the air ratio. This parameter improves the engine response with improved emission levels.

Ether Control

Programming this parameter to "DISABLED" will disable the ether functions. Program this parameter to "DISABLED" if the ether function is not being used or if ether is not installed on this engine. This will prevent the diagnostic codes for the ether control from being logged.

"Data Link #2 Identifier"

The interface will allow you to control the engine from a remote site.

Engine Cooling System

The engine can use the separate circuit aftercooler system (SCAC). The engine can use the jacket water aftercooler (JWAC).

Note: The ATAAC is only available for the 3500C Engines. The ATAAC parameter is not selectable for 3500B Engines.

Cold Mode Cylinder Cutout

This parameter enables the strategy for the cold mode cylinder cutout.

Fuel Position Multiplier

This parameter decreases the power output from the engine by reducing the fuel. This parameter is used to control the driven equipment. A decrease in engine power does not require a change in the throttle.

Engine Acceleration Rate

This parameter limits the rate of change for the desired engine speed. This parameter may also help reduce smoke when you start the engine.

Injector Trim Code

Note: The injector trim code is not part of the "Configuration" screen on Caterpillar Electronic Technician (ET). "Injector Codes Calibration" can be found under "Calibrations" in the "Service" menu on Cat ET.

The injector trim code is a number that is found on each of the unit injectors. The ECM uses this number to compensate for manufacturing variations between individual injectors. If you replace any of the unit injectors, you must reprogram the injector trim codes for the new injectors. Also, if you replace the ECM, you must reprogram all of the injector trim codes.