| Diagnostic Codes Table | |||
|---|---|---|---|
| Code and Description | Conditions which Generate this Code | System Response | Procedure |
| 268-2 Programmed Parameter Fault : Erratic, Intermittent, or Incorrect | The Electronic Control Module (ECM) detects that one or more of the programmable parameters have not been programmed. | The engine performance may be affected by unprogrammed parameters. The unprogrammed parameters determine the action that is taken by the ECM. The ECM may use a default torque map or the ECM may limit the engine to low idle. | Program the missing parameter. |
| 1495-2 Injector Trim Codes Not Programmed | The ECM detects that one or more of the injector trim codes has not been programmed. The ECM has been powered for three seconds. | The code is logged in memory. The engine will start. | Program the missing injector trim code. |
System configuration parameters are parameters that affect emissions and power of the engine. Default values for the parameters are programmed at the factory. Some parameters may be changed by the customer in order to suit the needs of the specific application. Values for these parameters can be viewed on Caterpillar Electronic Technician (ET). Certain configuration parameters are also stamped on the engine information plate.
No password is required for programming a new ECM during the first 100 hours of service life. This 100 hour “free configuration” feature enables the customer to tailor the programmable setpoints to the requirements of the installation. Exceptions are "Fuel Limit" and "Personality Module Mismatch".
Note: If the parameters that are protected with the factory passwords are changed, the Caterpillar warranty may be voided.
If a programmable parameter has not been programmed, the ECM will generate a 268-2 diagnostic code. The unprogrammed parameters will be set to default. Certain aspects of the engine's performance and engine monitoring may be affected.
If an injector code has not been programmed, the ECM will generate a 1495-2 diagnostic code. The injector 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 code for the new injectors. Also, if you replace the ECM, you must reprogram all of the injector codes.
Note: The injector codes are not part of the "Configuration" screen on the electronic service tool. "Injector Codes Calibration" can be found under "Calibrations" in the "Service" menu on Cat ET.
| System Configuration Parameters | |||
| Parameter | Default | Range | Password
Required |
| "Engine Rating and Personality Module Interlock" | Yes | ||
| "ECM Serial Number" | Yes | ||
| "Engine Serial Number" | 00000000 | 8 alphanumeric numbers | No |
| "Equipment ID" | 00000000000000000 | 17 alphanumeric numbers | No |
| "Full Load Setting (FLS)" | 0 | -128 to +127 | Yes |
| "Full Torque Setting (FTS)" | 0 | -128 to +127 | Yes |
| "Desired Speed Input Configuration" | LSM:PWM | PWM / J1939 | |
| "Secondary Desired Speed Input Configuration" | EMCPIII:J1939 | PWM / J1939 / Not Installed | |
| "Primary Fuel Enable Configuration" | EMCPIII:J1939 | Switch / J1939 | |
| "Secondary Fuel Enable Configuration" | Enabled | Enabled / Disabled | |
| "Secondary Fuel Configuration" | J1939 | Switch / J1939 | |
| "FARC" | 0 | 0 to 25 | No |
| "Rated Fuel Position (mm)" | 23.8mm | The minimum rack is based on engine power. | Yes |
| "Low Idle (rpm)" | 900 | 810 to 1450 | No |
| "Droop Slope (%)" | 3 | 0.0 to 10.0 | No |
| "Governor Gain Factor" | 37,050 | 0 to 40,000 | No |
| "Governor Minimum Stability Factor" | 2,200 | 0 to 40,000 | No |
| "Governor Maximum Stability Factor" | 10,050 | 0 to 40,000 | No |
| "Acceleration Delay on Start-up (sec)" | 0 | 0 to 60 | No |
| "Acceleration Rate (rpm/sec)" | 250 | 5 to 2000 | No |
| "Engine Prelube Duration (sec)" | 0 | 0 to 210 | No |
| "Cold Cylinder Cut- out Enable" | Disabled | Disabled / Enabled | No |
| "Programmable Torque Scaling" | Engine Dependent | Minimum Rack / Engine Dependent | Yes |
| "Cranking Duration (sec)" | 0 | 0 to 60 | No |
| "Maximum Number of Crank Cycles" | 0 | 0 to 10 | No |
| "Crank Terminate Speed (rpm)" | 400 | 100 to 500 | No |
| "Cooldown Speed (rpm)" | 900 | 810 to 1800 | No |
| "Cooldown Duration (min)" | 5 | 5 to 30 | No |
| "Engine Cooling System Configuration" | JWAC | SCAC / JWAC | Yes |
| "Air Intake Shutoff Detection Installation Status" | Installed | Installed
Not Installed |
No |
| "Intake Manifold Air Temperature" | Not Installed | Installed
Not Installed |
No |
| Engine State Control Input Configuration | Installed | Installed
Not Installed |
No |
| Injector Code (1) | 0000 | 4 numbers | No |
| Injector Code (2) | 0000 | 4 numbers | No |
| Injector Code (3) | 0000 | 4 numbers | No |
| Injector Code (4) | 0000 | 4 numbers | No |
| Injector Code (5) | 0000 | 4 numbers | No |
| Injector Code (6) | 0000 | 4 numbers | No |
| Injector Code (7) | 0000 | 4 numbers | No |
| Injector Code (8) | 0000 | 4 numbers | No |
| Injector Code (9) | 0000 | 4 numbers | No |
| Injector Code (10) | 0000 | 4 numbers | No |
| Injector Code (11) | 0000 | 4 numbers | No |
| Injector Code (12) | 0000 | 4 numbers | No |
"Engine Rating and Personality Module Interlock"
The "Engine Rating and Personality Module Interlock" is automatically programmed by the ECM after factory passwords are entered.
The "ECM Serial Number" is stored in the memory of the ECM. The "ECM Serial Number" can be accessed by the use of the service tool.
Program the "Engine Serial Number" to match the engine serial number that is stamped on the engine information plate.
Note: When you are requesting factory passwords, always use the engine serial number that is resident in the ECM.
"Equipment ID" allows the customer to enter a description into the ECM in order to identify the engine. A maximum of 17 characters may be entered in the field. This parameter is only for reference by the customer. This parameter is not required.
"FLS" is a number that represents the adjustment to the fuel system that was made at the factory in order to fine tune the fuel system. The correct value for this parameter is stamped on the engine information plate. Factory passwords are required.
"FTS" is similar to "FLS". Factory passwords are required.
"FTS" is similar to "FLS". Factory passwords are required.
"FTS" is similar to "FLS". Factory passwords are required.
"Desired Speed Input Configuration"
The "Desired Speed Input Configuration" is used to select the input type for the primary throttle.
"Secondary Desired Speed Input Configuration"
The "Secondary Desired Speed Input Configuration" is used to select the input type for the secondary throttle.
"Primary Fuel Enable Configuration"
The "Primary Fuel Enable Configuration" is used to select the input type for the primary fuel enable.
"Secondary Fuel Enable Configuration"
The "Secondary Fuel Enable Configuration" is used to indicate if a secondary fuel enable switch is installed.
"Secondary Fuel Configuration"
The "Secondary Fuel Configuration" is used to select the input type for the secondary fuel enable.
The "FARC" limit controls the amount of fuel to air ratio by limiting the rack as a function of boost pressure, engine speed, and altitude. The "Fuel Ratio Control" function permits an offset to be applied to the calculation for the altitude. The offset changes the fuel to the air ratio to a richer mixture or a leaner mixture.
This parameter is used to limit the engine power. A factory password is required to change this setting.
"Low Idle" is the minimum allowable operating speed for the engine.
The "Droop Slope" is used to set the secondary desired speed input slope.
The "Governor Gain Factor" is a programmable parameter that is multiplied by the error in engine speed in order to determine the rate of response to an engine load.
"Governor Minimum Stability Factor"
"Governor Minimum Stability Factor" functions in order to eliminate steady state speed error. The parameter is used by the ECM when the steady state speed error is less than 20 rpm.
"Governor Maximum Stability Factor"
"Governor Maximum Stability Factor" functions in order to eliminate steady state speed error. The parameter is used by the ECM when the steady state speed error is greater than 20 rpm.
"Engine Acceleration Delay on Startup"
"Engine Acceleration Delay on Start-up" is a time period that limits engine speed to low idle. This time period allows the engine oil pressure to build up to a minimum pressure.
"Engine Acceleration Rate" is the rate of acceleration and of deceleration.
The "Prelube Duration" is the length of time for the prelube to run.
"Cold Cylinder Cut-out Enable"
"Cold Cylinder Cutout Enable" enable the cold cylinder cutout strategy. The cold cylinder cutout automatically stops fuel injection to cylinders that are not firing. The fuel injection is stopped to the cylinders until the engine reaches operating temperature.
"Programmable Torque Scaling" is a way to derate an engine's maximum power output without exchanging torque maps.
This parameter determines the length of time that the starting motors will engage the flywheel before disengaging. Programming this parameter to 0 will prevent the ECM from engaging the starting motors.
"Maximum Number of Crank Cycles"
This parameter is the total number of crank cycles that can be performed.
This parameter determines the engine rpm that must be achieved prior to disengagement of the starting motor.
This parameter defines engine speed when the engine is in the cooldown mode.
This parameter defines the duration of the cooldown mode. Programming this parameter to 0 will disable this function.
"Engine Cooling System Configuration"
This parameter is used as a switch to toggle between the SCAC cooling system or the JWAC cooling system.
"Air Intake Shutoff Detection Installation Status"
The parameter is used to enable the detection circuit that monitors the state of the air shutoff valves.
"Intake Manifold Air Temperature"
The parameter is used to indicate if an "Intake Manifold Air Temperature" sensor is installed on the engine.
"Engine State Control Input Configuration"
The "Engine State Control Input Configuration" is used to select the input type for the Start/Run/Stop feature.
Note: The injector codes are not part of the "Configuration" screen on the electronic service tool. "Injector Codes Calibration" can be found under "Calibrations" in the "Service" menu on the electronic service tool.
The injector code is a number that is found on each unit injector. 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 code for the new injectors. Also, if you replace the ECM, you must reprogram all of the injector codes.