Rotax 915 i A series Maintenance Manual page 416

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.
NOTE
This work can only be carried out on the whole
unit.
• General visual inspection. See relevant Mainte-
nance Manual Line for the 915 i A Series engine
type.
• Use the BUDS diagnostic unit for troubleshooting
and to read out the error memory.
Plausibility test
BUDS (check the plausibility of the values of the sen-
sors with the aid of the Maintenance Tool):
Step Procedure
1 Engine standstill (cold engine).
2 Activate ECU.
3 Check the plausibility of the pressure,
temperature values.
4 Start the engine.
5 Check the plausibility of the sensors.
Elimination process for pressure sensors
(MAPS), temperature sensors (MATS) and injec-
tion valves (INJ)
In order to identify a component clearly as defective,
you should follow the process of elimination, e.g.
swap the wiring harness connectors on the sensor.
• If the error on the LANE remains the same, this
means the wiring harness is not in working order.
If the error appears on the other LANE after the
changeover, this means the sensor is not in working
order.
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Page 8
August 01 2018
BRP-Rotax
MAINTENANCE MANUAL HEAVY
ECU
LANE A
LANE B
Figure 18.4: Wiring diagram – elimination process
MANIFOLD PRESSURE SENSOR
(MAPS_1/MAPS_2) — REMOVAL
Installation position: Airbox
Procedure
Step
1 Cut open the cable ties.
2 Remove 2 clamps.
Figure 18.5
1 Pressure sensors
3 Cable ties
Sensor LANE A
Sensor LANE B
10075
2 Temperature sensors
Clamps
4
Effectivity: 915 i A Series
Edition 0/Rev. 0