15E-4
2.2 Turbocharger control function
•
In response to output data from various sensors, the engine electronic control unit determines the opening of tur-
bine vanes as required by the engine operating status and sends necessary control signals to the turbocharger
electronic drive unit. (target opening of turbine vanes)
•
The turbocharger electronic drive unit activates the turbocharger actuator motor to detect the amount of resultant
shaft position by means of the position sensor and sends it to the engine electronic control unit. (actual opening of
turbine vanes)
Thus, the target opening of turbine vanes can be accurately maintained as commanded by the engine electronic
control unit.
(1) Turbocharger actuator
•
In response to command signals from the turbocharger electron-
ic drive unit, the turbocharger actuator moves the shaft up and
down by means of its DC motor to open and close the turbine
vanes.
2.3 Fault diagnosis function
•
The engine electronic control unit continuously monitors the electronic drive units and sensors for faults. In the
event that the engine electronic control unit finds a component faulty, it causes an indication to be made in the
meter cluster to alert the driver. At the same time, it memorizes the fault location in the form of a diagnosis code
and starts a control during fault.
•
While the engine is running, the turbocharger electronic drive unit continuously monitor communication with the
position sensor and motor of the turbocharger actuator communication with the engine electronic control unit. In
the event that they identify a fault, they send fault data to the engine electronic control unit.
•
While control necessitated by a fault is taking place, the system’s functionality is limited to ensure vehicle and
driver safety. It is possible to read the memorized diagnosis code using a Multi-Use Tester or from flashing of the
warning lamp.
•
The control during fault recovers by servising the faults. However, for some diagnosis codes, the warning lamp
stays illuminated until the normal signals are input for several times.
•
Diagnosis codes shown by the Multi-Use Tester and those indicated by flashing of the warning lamp are different.
•
The Multi-Use Tester is capable of showing more detailed diagnosis codes.
STRUCTURE AND OPERATION
Содержание Fuso CANTER FE85DE6SLGP
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