HARNESS AS-STEERING 2287287 - Caterpillar

Major components of the electronic control system are the following items:
Aftercooler coolant temperature sensor
Turbocharger inlet pressure sensor
Turbocharger outlet pressure sensor
Electronic control module
Wiring harness
Engine coolant temperature sensor
Engine oil pressure sensor
Engine speed/timing sensor
Personality module
Atmospheric pressure sensor
Throttle position sensor
Crankcase pressure sensor
Exhaust temperature sensorThe electronic control system is designed into the engine's fuel system, and into the air inlet and exhaust system. The system is designed to electronically control the delivery of fuel and injection timing. The system provides increased control of the timing and the fuel ratio control when the system is compared to conventional mechanical engines. Injection timing is achieved by precise control of injector firing time. Engine speed is controlled by adjusting the firing duration. The Electronic Control Module (ECM) energizes the fuel injector solenoids in order to start fuel injection. Refer to System Operation, "Fuel Injector" for a complete explanation of the fuel injection process.The engine uses three types of electronic components:
Input
Control
OutputAn input component sends an electrical signal to the electronic control module of the system. The signal varies in either voltage or frequency in response to a change in a specific system. The electronic control module sees the input signal from the sensor as information about the machine. The information may be about the condition, environment, or operation of the machine.A control component for the system receives the input signals. Electronic circuits inside the control evaluate the signals. The circuits supply electrical energy to the output components of the system. The energy is supplied in response to predetermined combinations of input signal values.An output component is operated by a control module. The output component receives electrical energy from the control group. The output component uses the energy to do the following tasks:
Perform work such as energizing the fuel injector solenoid which starts the fuel injection, taking an active part in regulating or operating the machine.
Give information or warning to the operator of the engine.These components provide the ability to electronically control the engine operation. This ability will achieve the following items: increased engine performance, reduced fuel consumption and reduced emission levels.