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The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere. |
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Use this procedure if the diagnostic code in Table 1 is active.
| Diagnostic Codes Table | ||
|---|---|---|
| Code and Description | Conditions which Generate this Code | System Response |
| 268-2 Programmed Parameter Fault erratic, intermittent, or incorrect | The engines 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. |
System configuration parameters are parameters that affect emissions, power of the engine, and machine applications. 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. You must reprogram the system configuration parameters if the ECM is replaced and/or if you reprogram the engine to a new rating. Values for these parameters are available on Caterpillar Electronic Technician (ET). Certain configuration parameters are also stamped on the engine information plate.
Parameter Descriptions
"Equipment ID"
This parameter allows the customer to enter a description into the ECM in order to identify the engine installation. A maximum of 17 characters can be entered in the field.
"Engine Serial Number"
Program the "Engine Serial Number" to match the engine serial number that is stamped on the engine information plate. The engine serial number is not preprogrammed on a replacement ECM.
"Rating Number"
The rating number corresponds to the selected set of performance maps that has been selected for this application. There may be more than one set of performance maps that are available for this engine. All of the maps are resident in the flash file for the engine.
Note: Factory passwords are required in order to change the rating number.
"Top Engine Limit" (TEL)
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| Illustration 1 | g00763900 |
"TEL" is a customer programmable parameter that defines the maximum allowable engine speed for maximum power. "TEL" can be programmed up to the maximum rated engine speed. "TEL" is defined along the engines lug curve.
"Engine Accel. Rate"
"Engine Accel. Rate" determines the rate of change of the engine speed (acceleration or deceleration) during PTO operation. This rate of change is also used to achieve intermediate engine speed.
"Low Idle Speed"
This parameter allows the customer to set the minimum allowable operating speed for the engine. This parameter can be programmed between 600 and 1400 rpm.
"PTO Mode"
"PTO Mode" allows the ECM to be programmed to either one of the two PTO configurations that are available.
"Ramp Up/Ramp Down" - When "PTO Mode" is programmed to "Ramp Up/Ramp Down", the ECM allows PTO operation with traditional features.
"Set/Resume" - When "PTO Mode" is programmed to "Set/Resume", the ECM allows PTO operation with enhanced features.
"High Idle Speed"
| | |
| Illustration 2 | g00763900 |
This parameter allows the customer to set the maximum no-load engine speed when the throttle or the PTO switch is in the maximum position.
Note: "High Idle Speed" cannot be programmed lower than "TEL".
"Intermediate Engine Speed"
"Intermediate Engine Speed" defines the speed for the engine when the intermediate engine speed switch is activated. This parameter can be programmed to any engine speed between "Low Idle Speed" and "TEL". Engine speed will increase or engine speed will decrease at the rate that is defined by the programmed value for "Engine Accel. Rate".
"Maximum Engine Torque Limit"
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| Illustration 3 | g00817759 |
This parameter is used to limit torque output to the programmed value when the torque limit switch is activated.
"FLS" (Full Load Setting)
"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 in order to change this parameter.
"FTS" (Full Torque Setting)
"FTS" is similar to "FLS". Factory passwords are required in order to change this parameter.
"Air Shutoff"
"Air Shutoff" allows the ECM to be programmed for operation of an air shutoff system. If this parameter is programmed to "Installed", the ECM will activate the air shutoff solenoid in the event of an engine overspeed condition.
Note: If an engine overspeed condition occurs and "Air Shutoff" is programmed to "Enabled", the switched power to the ECM must be cycled and the air shutoff solenoid must be manually reset before the engine will restart.
"Maintenance Indicator Mode"
The ECM records data that is related to equipment maintenance. The ECM will activate the maintenance indicator lamp when scheduled maintenance is due. The maintenance indicator lamp can be reset by actuating the maintenance clear switch. The maintenance interval may be based on operating hours or on fuel consumption. The ECM provides information that pertains to maintenance intervals and the last maintenance that was performed.
"PM1 Interval"
This parameter allows the customer to define the maintenance interval if "Maintenance Indicator Mode" is programmed to one of the manual options. Refer to the engines Operation and Maintenance Manual for more information.
"Throttle Position Sensor"
Program the "Throttle Position Sensor" to "Installed" if a throttle position sensor is used for desired speed control. Otherwise program this parameter to "Not Installed".
"Coolant Level Sensor"
Program the "Coolant Level Sensor" to "Installed" if a coolant level sensor is installed on the engine. Otherwise program this parameter to "Not Installed".
"Overspeed Trip"
The air inlet shutoff will actuate if the engine speed is greater than the "Overspeed Trip" setting. This mode of operation is "Overspeed Protection".
"Aux Press Sensor Installation Status"
Program "Aux Press Enable" to "Installed" if an auxiliary pressure sensor is installed. This will allow the display for the Engine Monitoring System (EMS) to monitor the pressure of another system. Program this parameter to "Not Installed" if an auxiliary pressure sensor is not installed.
"Aux Temp Sensor Installation Status"
Program "Aux Temp Enable" to "Installed" if an auxiliary temperature sensor is installed. This will allow the display for the EMS to monitor the temperature of another system. Program this parameter to "Not Installed" if an auxiliary temperature sensor is not installed.
System Configuration Parameters
| System Configuration Parameters | |||||
|---|---|---|---|---|---|
| Parameter | Available Range or Options | Default | Required Password | ||
| ECM Identification Parameters | |||||
| "Equipment ID" | 17 alphanumeric characters | "NOT PROGRAMMED" | None | ||
| "Engine Serial Number" | 0XX00000 or XXX00000 | 0XX00000 | None | ||
| "ECM Serial Number" | "Read Only" (1) | ||||
| "Software Gp Part Number" | Software Dependent | Read Only (1) | |||
| "Software Gp Release Date" | Software Dependent | Read Only (1) | |||
| Selected Engine Rating | |||||
| "Rating Number" | Software Dependent | Customer | |||
| "Rated Power" | Software Dependent | Read Only (1) | |||
| "Rated Peak Torque" | Software Dependent | Read Only (1) | |||
| "Top Engine Speed Range" | Software Dependent | Read Only (1) | |||
| "Test Spec" | Software Dependent | Read Only (1) | |||
| "Top Engine Limit" | Software Dependent | Customer | |||
| "Engine Governor Primary Mode" | "Speed Control" "Min/Max" |
"Speed Control" | None | ||
| "Engine Accel. Rate" | 50 to 1000 | 50 | None | ||
| "Low Idle Speed" | 600 to 1400 | 700 | None | ||
| "PTO Mode" | "Ramp Up/Ramp Down" "Set/Resume" |
"Ramp Up/Ramp Down" | None | ||
| "High Idle Speed" | 2200 to 2420 | 2420 | Customer | ||
| "Intermediate Engine Speed" | Programmed "Low Idle" to "TEL" | 1100 | None | ||
| "Throttle Position Sensor" | "Installed" "Not Installed" |
"Not Installed" | None | ||
| "Maximum Engine Torque Limit" | Software Dependent | None | |||
| "Customer Password #1" | 8 alphanumeric characters | Blank | Customer | ||
| "Customer Password #2" | 8 alphanumeric characters | Blank | Customer | ||
| "FLS" (Full Load Setting) | - 128 to 127 | 0 | Factory | ||
| "FTS" (Full Torque Setting) | -128 to 127 | 0 | Factory | ||
| "Air Shutoff" | "Enabled" "Disabled" |
"Disabled" | None | ||
| "Maintenance Indicator Mode" | "OFF" "Auto Fuel" "Auto Hour" "Man Fuel" "Man Hour" |
"OFF" | None | ||
| "PM1 Interval" | 100 to 750 Hours or 3785 to 28390 L (1000 to 7500 US gal) |
250 Hours or 9463 L (2500 US gal) |
None | ||
| "Throttle Position Sensor" | "Installed" "Not Installed" |
"Not Installed" | None | ||
| "Coolant Level On" | "Installed" "Not Installed" |
"Not Installed" | None | ||
| "Last Tool to change Customer Parameters" | Read Only (1) | ||||
| "Last Tool to change System Parameters" | Read Only (1) | ||||
| "Aux Temp Sensor Installation Status" | "On" "Off" |
"Off" | None | ||
| "Aux Press Sensor Installation Status" | "On" "Off" |
"Off" | None | ||
| "Total Tattletale" | Read Only (1) | ||||
| ( 1 ) | The parameter can only be viewed. No changes are allowed. |
Parameters Worksheet
Note: A mistake in recording this information will result in incorrect passwords.
| Engine Parameters | |
|---|---|
| ECM Identification Parameters | |
| "Equipment ID" | |
| "Engine Serial Number" | |
| "ECM Serial Number" | |
| "Software Gp Part Number" | |
| "Software Gp Release Date" | |
| Selected Engine Rating | |
| "Rating Number" | |
| "Rated Power" | |
| "Rated Peak Torque" | |
| "Top Engine Speed Range" | |
| "Test Spec" | |
| "Top Engine Limit" | |
| "Engine Accel Rate" | |
| "Low Idle Speed" | |
| "PTO Mode" | |
| "High Idle Speed" | |
| "Intermediate Engine Speed" | |
| "Maximum Engine Torque Limit" | |
| "Customer Password #1" | |
| "Customer Password #2" | |
| "FLS" | |
| "FTS" | |
| "Ether Control" | |
| "Air Shutoff" | |
| "Maintenance Indicator Mode" | |
| "PM1 Interval" | |
| "Throttle Position Sensor" | |
| "Coolant Level Sensor" | |
| "Last Tool to change Customer Parameters" | |
| "Last Tool to change System Parameters" | |
| "Aux Press Temp Installation Status" | |
| "Aux Press Sensor Installation Status" | |
| "Total Tattletale" | |
| Information from Engine Information Plate | |
| "Engine Serial Number" | |
| "FLS" | |
| "FTS" | |
| Injector Codes | |
| Injector Code (1) | |
| Injector Code (2) | |
| Injector Code (3) | |
| Injector Code (4) | |
| Injector Code (5) | |
| Injector Code (6) | |
Note: Compare the FLS and the FTS from the ECM with the values that are listed on the engine information plate. Only change the FLS and the FTS because of a mechanical change in the engine. The use of the wrong parameters could cause damage to the engine. The use of the wrong parameters may also void the Caterpillar warranty.