3512B Petroleum Engines with the ADEM 2 Electronic Control Module Caterpillar

System Configuration Parameters affect emissions, power of the engine, and other features. The parameters are programmed at the factory. In most cases, the parameters do not require change. The System Configuration Parameters must be reprogrammed if an Electronic Control Module (ECM) is replaced and/or the engine rating is reprogrammed. System Configuration Parameters do not require change if the Personality Module (PM) is replaced. Proper values for these parameters are available on the 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)

A 268-02 Check Programmable Parameters diagnostic code will be generated if one or more of the programmable parameters has not been programmed. The unprogrammed parameters will be set to default. Certain aspects of the engine 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 personality module part number. The Interlock Code does not allow the engine to run if the wrong FLASH file has been downloaded into the ECM Personality Module.

The 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 the 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 3500B 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 3500B ECM. The Interlock Code cannot be reset if the wrong ECM is installed. If an incorrect ECM is used, a 253-02 Personality Module Mismatch diagnostic code 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 or by checking the last two characters of the ECM serial number. The correct ECM serial number ends with CD.

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

The engine serial number should be programmed 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.

Table 1

Minimum	Default	Maximum
Minimum Rack	Engine Dependent	Engine Dependent

Low Idle

The parameter defines the lowest rpm level.

Table 2

Minimum	Default	Maximum
450 rpm	600 rpm	1000 rpm

Cooldown Speed

This parameter defines the engine speed when the engine shutdown is activated.

Table 3

Minimum	Default	Maximum
450 rpm	600 rpm	1800 rpm

Engine Cooldown Duration

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

Table 4

Minimum	Default	Maximum
0 minutes	0 minutes	60 minutes

Engine Prelube Duration

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

Table 5

Minimum	Default	Maximum
0 seconds	0 seconds	210 seconds

Crank Duration

The crank duration determines when the starting motors will be energized. The crank duration determines when the starting motors will be disengaged. Programming this parameter to 0 will prevent the ECM from engaging the starting motors.

Table 6

Minimum	Default	Maximum
0 seconds	0 seconds	60 seconds

Maximum No. Of Cranking Cycles

This parameter is the total number of crank cycles that can be performed.

Table 7

Minimum	Default	Maximum
0	0	10

Crank Terminate Speed

This parameter determines when the starting motor will disengage.

Table 8

Minimum	Default	Maximum
100 rpm	400 rpm	500 rpm

Air Shutoff

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

Table 9

Minimum	Default	Maximum
Disabled	Enabled	Enabled

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. The offset 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 air ratio. This parameter improves the engine response with improved emission levels.

Table 10

Minimum	Default	Maximum
-25	0	25

Ether Control

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

Table 11

Minimum	Default	Maximum
Disabled	Disabled	Enabled

"CCM Interface"

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

Table 12

Minimum	Default	Maximum
Engine Control 1	Engine Control 1	Engine Control 8

Engine Cooling System

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

Table 13

Minimum	Default	Maximum
SCAC	SCAC	JWAC

Cold Mode Cylinder Cutout

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

Table 14

Minimum	Default	Maximum
Disabled	Enabled	Enabled

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.

Table 15

Minimum	Default	Maximum
Disabled	Enabled	Enabled

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.

Table 16

Minimum	Default	Maximum
1 rpm / sec.	250 rpm / sec.	2000 rpm / sec.

Programmable Operator Switch

The "Programmable Operator Switch" parameter is used to determine the input for the ECM terminal J1-61. The parameter can be programmed to "Overspeed Verify" or to "Programmable Torque Limit".

Overspeed Verify

The "Overspeed Verify" setpoint is set to 75 percent of rated speed. The "Overspeed Verify" feature can be initiated in the Cat ET "Override" screen. When the engine rpm reaches the setpoint, the normal overspeed strategy is initiated. Fueling is disabled until the ECM is power cycled. NOTE:

Note: The "Overspeed Verify" feature is disabled if the overspeed shutdown function is programmed to OFF.

Programmable Torque Limit

The "Torque Limit" can be used to limit engine torque output. The torque limit is activated when the "Programmable Operator Switch" is programmed to "Torque Limit" and ECM terminal J1-61 is closed to ground. The maximum engine torque limit must be configured in Cat ET prior to using the switch.