Rotax 912 i Series Maintenance Manual page 377

ACTUATORS AND INDICATORS
Injection valve (INJ_1 to INJ_8): (Injector)
In the engine, eight injection valves (INJ) are
used, two for each cylinder.
Ignition coil (IGN): (Ignition Coil)
Four double ignition coils (with one primary coil
and one secondary coil each) are attached to the
engine. Each end of the secondary coil is con-
nected to a spark plug of different cylinders by
ignition cables.
SAFETY INFORMATION
WARNUNG WARNING
Danger of injury when removing hose connec-
tions, sensors and actuators!
Risk of fire due to flammable substances (e.g.
fuel)
Naked flames and smoking in the installation
area is not permitted!
NOTICE
WARNUNG
Danger of damage to the fuel distribution system
and ignition unit!
Do not touch or pull out ignition cables when the
engine is running or at starting speed.
The general safety instructions must be
NOTE:
followed during all work on the sensors
and actuators!
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
MAINTENANCE
For maintenance and special checks, see the
relevant Maintenance Manual Line for the res-
pective 912 i Series engine type.
REMOVAL
Preparation
Before the sensors and actuators are removed,
the procedures and checks described below
must be carried out to identify any further faults
in the cylinder head and rectify them as part of
repair work.
This work can only be carried out on the
NOTE:
whole unit.
- General visual inspection. See relevant Main-
tenance Manual Line for the 912 i Series
engine type.
- Use the BUDS diagnostic unit for trouble-
shooting and to read out the error memory.
Plausibility test
BUDS (check the plausibility of the values of the
sensors with the aid of the Maintenance Tool):
Step
1
2
3
4
5
Elimination process for pressure sensors
(MAPS), temperature sensors (MATS) and injec-
tion valves (INJ)
In order to identify a component clearly as defec-
tive, you should follow the process of elimina-
tion, e.g. change round the wiring harness
connectors on the sensor.
- If the error on the LANE remains the same,
this means the wiring harness is not in work-
ing order.
If the error appears on the other LANE after the
changeover, this means the sensor is not in wor-
king order.
Procedure
Engine standstill (cold engine).
Activate ECU.
Check the plausibility of the pressure,
temperature values.
Start the engine.
Check the plausibility of the sensors.
See Fig. 1.
76-70-00
Page 7
July 01/2012