ECU A
Voter
Sensors ECU A
Sensors ECU B
Shared Sensors
Relay
Matrix
Actuators
3way Cockpit
Switch
EECU
ECU A VoterECU B
Power Supply
ECU A
Power Supply
ECU B
ECU B
Engine
Indications /
Annunciations
A/C
Sensor A Sensor B
Power
Lever
Fig. 01 - 17 EECU
Electrical Interfaces
o Outputs protected against
Short Circuit Ubatt
Short Circuit GND
o Diagnosis on Outputs and Sensor Inputs
Short Circuit Ubatt
Short Circuit GND
Open Load
o Sensor Inputs
Linearization of the input voltage
According to the sensor characteristics
Monitoring of external interfaces
o External interfaces are monitored (sensors, actuators)
o A recognised failure (e.g. electrical) is internally reported
o Reported failures may inhibit other functions/monitoring
SW Function Montoring
o Separately calculated Values are used for monitoring the main Engine Control
Functions (e.g. Engine Speed Calculation, Injection Quantity Calculation)
EECU Hardware Monitoring provided
o Internal Supplies
o Internal Memories
o Internal communication
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