Rotax 912 i Series Maintenance Manual page 385

INSPECTION
SENSORS AND ACTUATORS
INSPECTION/MEASUREMENT
Preparation
Before starting to inspect the sensors
NOTE:
and actuators, ensure that the whole air-
craft system is fully functional!
Aircraft components to be checked:
- Battery
- Fuses
- Grounding connections
- Cable connections
GENERAL TEST PROCEDURE
NOTICE
WARNUNG
During work on the components of the engine
management system, there is a risk of damage.
Never put measuring probes in plug connectors
or use paper clips to carry out tests in the plug
connectors.
The MAINTENANCE TOOL BUDS soft-
NOTE:
ware must be used for diagnostics!
- After a problem has been solved, any error
entries in the ECU must be documented with
the MAINTENANCE TOOL and then deleted.
Functional test
The function of the sensors and actuators must
be checked with the ECU activated.
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
GENERAL RESISTANCE MEASUREMENT
Before checking the resistance, ensure that
there is no voltage present at the component to
which the ohmmeter is connected. Always pull
out the connectors beforehand. Switch off the
ignition. Disconnect the battery. Otherwise the
measurement unit can be damaged.
The ohmmeter is connected to the 2 connections
of a consumer or to the 2 ends of an electric line.
It doesn't matter which cable (+/-) of the measu-
rement unit is clamped to which contact. Excep-
tions are resistance measurements on
components which contain diodes.
The resistance measurement on the engine usu-
ally covers 2 areas:
- Resistance or component check
- Continuity check of an electric cable, a switch
etc. This checks whether an electric cable is
disconnected so that the connected electric
device cannot function. The ohmmeter is con-
nected to the two ends of the electric cable in
question for the measurement. If the resis-
tance is close to 0 (zero) then there is conti-
nuity. This means the electric cable is in
working order. If the cable is broken, the mea-
surement unit displays infinity.
Fig. 19
R Ohmmeter
R
V Consumer
76-70-00
V
06342
Page 15
July 01/2012