PLATE AS 1855547 - Caterpillar

Engine Cold Mode
Engine cold mode is used to control fuel injection timing when the engine is cold. Engine cold mode changes the fuel injection timing in order to prevent engine damage. Engine cold mode also reduces white smoke. Engine cold mode is activated when the engine coolant temperature is below 70 °C (158 °F). Engine cold mode remains active until the engine coolant temperature is warmer than 73 °C (163 °F).Elevated Low Idle
Elevated low idle prevents overcooling of the engine. Elevated low idle also accelerates engine warm-up.
Illustration 1 g01012376
Map for coolant temperature versus engine speed
The Engine ECM will activate the elevated low idle after 10 minutes following start-up.When the engine coolant temperature is less than 70 °C (158 °F), engine idle speed is raised to 1600 RPM. Between 70 °C (158 °F) and 75 °C (167 °F), the engine idle speed is gradually reduced to the normal low idle speed. When the engine coolant temperature is greater than 75 °C (167 °F), the elevated low idle is disabled. When the elevated low idle is disabled, the engine speed returns to the low idle speed. The machine comes from the factory with the low idle set to 700 rpm.Activated
The following items must be present before elevated low idle will activate:
The transmission control is in the NEUTRAL position.
The parking brake is in the ON position.
The ground speed of the machine is zero.Deactivated
The following actions will deactivate elevated low idle:
The accelerator control (pedal) is depressed by more than 25 percent of the pedal's travel.
The manual ether switch is depressed.
The transmission is moved into gear.
The parking brake is disengaged.Note: Elevated low idle will activate again after 30 seconds if the transmission is in the NEUTRAL position and if the parking brake is in the ON position and if the accelerator has not been depressed. If the accelerator has been depressed, elevated low idle will activate again after 10 minutes.Cold Cylinder Cutout
The Engine ECM will activate the cold cylinder cutout after 10 seconds following start-up.Note: During the cold cylinder cutout, the engine may seem to misfire. This does not indicate the need for any type of engine repair.During a cold start-up and periods of extended time at low idle, the Engine ECM will automatically turn off one electronic unit injector at a time. The Engine ECM checks the rack in order to determine if the cylinder is firing. If the cylinder is firing, the Engine ECM turns on the electronic unit injector. If the cylinder is not firing, the electronic unit injector will remain disengaged. This reduces the white smoke that is caused by unburned fuel.The cold cylinder cutout becomes active when the engine coolant temperature decreases to 63 °C (145 °F). The cold cylinder cutout will also activate when the aftercooler coolant temperature decreases to 3 °C (37 °F). The cold cylinder cutout is deactivated when the engine coolant temperature rises above 70 °C (158 °F). The cold cylinder cutout will also deactivate when the aftercooler coolant temperature increases to 10 °C (50