Diamond DA 42 NG, Maintenance Manual

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AIRCRAFT
DA 42 NG AMM Engine Controls
Doc # 7.02.15
Rev. 4
76-00-00
Page 5
15 Mar 2018
The left side of the engine has cables to the sensors for oil pressure and oil temperature and cables
for the starter and alternator.
The repair of the electrical harness is limited to damage that occurs near the ends of the cables,
outside of the isolated section. If a cable fails within the isolated section, then you must replace the
complete harness.
C. Manifold Pressure
Manifold pressure is measured by two sensors for each ECU located at the air intake manifold.
D. Power Levers
Each engine has a dedicated power level. Figure 2 shows the installation of the engine power
levers. Each power lever is located in the center console. The power levers assemble as a unit to
the engine control assembly in the center console.
Each power lever has two separate and independent electrical systems. One system provides
signals to the ECU A. The other system provides signals to the ECU B. Either system can control
the engine.
The levers operate electrical sensors (HALL effect) that give signals in proportion to the power lever
position. The signals are used by the engine control system to set the power output. The control
system also sets the propeller governor to give best RPM for the power setting. Refer to Section
61-20 for more data on the propeller control function.
Push rods connect the throttle levers to the Hall-sensors. You can adjust the relative position of
each power lever relative to its sensor by adjusting the length of the related push rod. You can
make this adjustment so that the power levers align with each other when the engines are giving
the same power output.