SWITCH AS-TEMPERATURE 3E6453 - Caterpillar

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.
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 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)
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