Mitsubishi Fuso CANTER FE85DE6SLGP, Руководство по ремонту

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17E-6
(2.1) Intake throttle
•
In accordance with signals from the throttle electronic drive unit,
the motor opens and closes the butterfly valve, thereby adjusting
the intake air amount such that the effectiveness of exhaust gas
recirculation is maximized.
(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 exhaust gas recirculation electronic drive unit and throttle electronic drive unit
continuously monitor communication with the position sensor and motor of the exhaust gas recirculation valve,
communication with the position sensor and motor of the throttle actuator, and 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.
2.3 Diesel particulate filter
(1) Diesel particulate filter clogged warning function
•
The function works to alert the driver that the filter is clogged with accumulated particulate matter when the engine
electronic control unit so determines.
• The engine electronic control unit determines whether or not the diesel particulate filter is clogged according to
the difference between diesel particulate filter pressure and atmospheric pressure received from the diesel partic-
ulate filter differential pressure sensor.
(1.1) Diesel particulate filter differential pressure sensor
•
The sensor compares diesel particulate filter pressure with at-
mospheric pressure and outputs difference data to the engine
electronic control unit.
• When the pressure difference exceeds the specified limit, the
engine electronic control unit turns on the warning lamp in the
meter cluster and the buzzer, thereby warning the driver of the
existing condition.
(2) Diagnostic function
•
The engine electronic control unit monitors the condition of the sensors for failure. 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. Then, a control during
fault is started.
• When control-during-fault is started, system function is restricted to ensure safety of the vehicle and driver. Stored
diagnosis codes can be retrieved on the Multi-Use Tester or the meter cluster.
STRUCTURE AND OPERATION