Page 1229 - Foton Workshop Manual - Tunland (AT)

ENGINE CONTROL SYSTEM - ENGINE CONTROL SYSTEM 11-3

performance of the engine can be improved, and the fault diagnosis function is provided so 11
that the reliability can be improved.

Engine control module input
The engine control module (ECM), the control center of the system, handles all input
information and issues instructions to fuel systems, vehicles, and engine controls. ECM
conducts diagnostic tests on most circuits and activates a fault code if a problem is detected
in one circuit. Snapshot data for engine operating parameters are also stored in memory as
the instructions fault code appears.The current fault code lights the diagnostic indicator and
notifies the operator as a signal. Through the SAE J1939 data communication interface, the
ECM can communicate with the maintenance tools and other vehicle / equipment control
devices (such as transmission, ABS, ASR, electronic dashboard display, etc.). Some vehicles
and devices are equipped with the SAE J1939 network, which connects many intelligent
controllers. The vehicle / device control device can temporarily control the engine speed or
torque to perform some of its functions (such as shifting, ABS, etc.).
The functionality of the engine control system includes:

• Oil rail pressure sensor control

• Mileage memory

• Overvoltage protection

• Fuel pump actuator operation control

• Crankshaft position sensor control

• Camshaft position sensor control

• Vehicle main power relay control

• Preheat relay control

• A/C & cooling tank fan control
The functionality of the engine control system
includes • Coolant temperature sensor control

• Diesel filter heater control

• Turbocharger actuator control

• Intake mass flow sensor control

• Electronic throttle control
• Electronic accelerator pedal control

• Electronically controlled EGR valve control
• Intake manifold pressure / temperature
sensor control

• Exhaust pressure sensor control

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