842079 Volvo.Penta Cover

Use this procedure if the diagnostic code in Table 1 is active.
Table 1
Diagnostic Codes Table
Code and Description Conditions which Generate this Code System Response
268-2 Programmed Parameter Fault erratic, intermittent, or incorrect 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. 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)
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 engine's 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 g00763900This 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"
Illustration 3 g00817759This 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."Ether Control"
Program the "Ether Control" to "Enabled" if an ether injection system is installed on the engine. This allows the ECM to control ether injection. If the engine is not equipped with ether, program this parameter to "Disabled"."Air Shutoff"
This parameter 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 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 engine's Operation and Maintenance Manual for more information.