3508C, 3512C, and 3516C Locomotive Engines Caterpillar

Use this procedure if any one of the diagnostic codes in Table 1 is active.

Table 1

Diagnostic Codes Table
Description	Conditions which Generate this Code	System Response
268-2 Check Programmable Parameters	The engine's Electronic Control Module (ECM) detects that one or more of the programmable parameters have not been programmed.	The ECM may use a default torque map or the ECM may limit the engine to low idle. The code is active only.
253-2 Personality Module mismatch	The flash file in the engine's ECM is for a different type of engine. The interlock code in the non-volatile memory does not match the flash file. or The flash file is not compatible with the ECM.	The interlock for the personality module code must be set to zero in order to reset the code. Factory passwords are required to change the interlock code. The code is active only. The engine may not run.
1495-2 Injector Trim Codes Not Programmed	The engine's ECM detects that one or more of the injector trim codes have not been programmed.	The ECM may use a default torque map or the ECM may limit the engine to low idle. The code is active only.

Some system configuration parameters are configurable by the customer in order to suit the customer's particular application. The configuration file contains all of the adjustable settings for the monitoring system. The engine is shipped from the factory with default values for these parameters. 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.

If the default settings for the parameters have been modified, there will be no record at the factory of the changes. These settings can be downloaded into a laptop computer and saved to a file. The customer can then use the file in order to facilitate replacement of the ECM.

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 parameter has not been programmed, the ECM will activate a 268-02 diagnostic code. 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. Installing the incorrect flash file into the ECM may void the Caterpillar warranty.

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.

Equipment ID

The customer can assign an "Equipment ID" for the purpose of identification. The "Equipment ID" is not a required parameter. The "Equipment ID" can be any 17 characters.

Engine Serial Number

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

Full Load Setting (FLS)

This parameter represents the adjustment for the fuel system in order to fine tune the fuel system's maximum fuel delivery. A factory password is required to change this setting.

Table 2

Minimum	Default	Maximum
-128	Not Programmed	+127

Full Torque Setting (FTS)

This parameter is similar to the FLS. A factory password is required to change this setting.

Table 3

Minimum	Default	Maximum
-128	Not Programmed	+127

Rated Fuel Position

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

Table 4

Minimum	Default	Maximum
Minimum Rack	Engine Dependent	Engine Dependent

Low Idle

The parameter defines the lowest rpm level.

Table 5

Minimum	Default	Maximum
450 rpm	600 rpm	1000 rpm

Fuel Correction Factor (FCF)

The FCF is used to adjust the calculation of fuel consumption. The FCF is used to correct the estimated fuel rate.

Table 6

Minimum	Default	Maximum
-25	0	25

Cooldown Speed

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

Table 7

Minimum	Default	Maximum
450 rpm	600 rpm	1800 rpm

Engine Cooldown Duration

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

Table 8

Minimum	Default	Maximum
0 minutes	0 minutes	60 minutes

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.

Table 9

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 10

Minimum	Default	Maximum
0	0	10

Crank Terminate Speed

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

Table 11

Minimum	Default	Maximum
100 rpm	400 rpm	500 rpm

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.

Table 12

Minimum	Default	Maximum
-25	0	25

Cat Data Link #2 Identifier

Table 13

Engine Control	MID	Default
#1	$24	yes
#2	$21
#3	$22
#4	$23
#5	$25
#6	$26
#7	$28
#8	$29

Engine Cooling System

This parameter determines the configuration of the cooling system. This parameter requires a factory password to change.

Table 14

Minimum	Default	Maximum
SCAC	SCAC	JWAC

Cold Mode Cylinder Cutout

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

Table 15

Minimum	Default	Maximum
Disabled	Enabled	Enabled

Droop

This parameter allows the engine to operate in a load sharing system.

Table 16

Minimum	Default	Maximum
0.0	0.0	10

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 17

Minimum	Default	Maximum
Disabled	Disabled	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 18

Minimum	Default	Maximum
1 rpm per second	250 rpm per second	2000 rpm per second

Cooling Warning Engine Load Enable

This parameter is used to issue a warning to the operator that to much load has been added to the engine before the jacket water has reached the proper operating temperature of 75 °C (167 °F) or greater.

Table 19

Minimum	Default	Maximum
5%	40%	95%

Throttle

The parameter is used to decide whether the continuous throttle or the multi-position throttle will be used. Table 21 defines notch speeds for a multi-position throttle.

Table 20

Minimum	Default	Maximum
Continuous	Continuous	Notch

Table 21

Notch Speed Number	Percent Duty Cycle	Minimum RPM	Default RPM	Maximum RPM
Idle	<10	450	600	1900
1	<20	450	700	1900
2	<30	450	1300	1900
3	<40	450	1500	1900
4	<50	450	1600	1900
5	<60	450	1675	1900
6	<70	450	1715	1900
7	<80	450	1770	1900
8	<95	450	1800	1900

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.

Table 22

Injector Trim Code
Injector	Default	Range	Password
"Inj #1 e-trim"	0000	4 numeric characters	No
"Inj #2 e-trim"	0000	4 numeric characters	No
"Inj #3 e-trim"	0000	4 numeric characters	No
"Inj #4 e-trim"	0000	4 numeric characters	No
"Inj #5 e-trim"	0000	4 numeric characters	No
"Inj #6 e-trim"	0000	4 numeric characters	No
"Inj #7 e-trim"	0000	4 numeric characters	No
"Inj #8 e-trim"	0000	4 numeric characters	No
"Inj #9 e-trim"	0000	4 numeric characters	No
"Inj #10 e-trim"	0000	4 numeric characters	No
"Inj #11 e-trim"	0000	4 numeric characters	No
"Inj #12 e-trim"	0000	4 numeric characters	No
"Inj #13 e-trim"	0000	4 numeric characters	No
"Inj #14 e-trim"	0000	4 numeric characters	No
"Inj #15 e-trim"	0000	4 numeric characters	No
"Inj #16 e-trim"	0000	4 numeric characters	No