Rotax 914 F Maintenance Manual page 55

The electronic TCU (Turbo Control Unit) R is the central processing unit as
junction of all engine inputs. For functioning of the TCU following sensors and
pick-ups are required.
All the sensors are connected with the TCU via a common cable harness P.
Beside the power supply { for the TCU the following further connections are
provided on the cable harness.
Q turbo charger
W waste gate
E servo motor
Pic. 29
1
Modification no.
- 0 -
airbox pressure sensor T
provides the actual boost pressure in the airbox
static pressure sensor Y
conveys the prevailing atmospheric pressure
throttle position potentiometer U
supplies actual position of carburetor throttle
From the inputs of the sensors T - U the target pressure is
NOTE:
determined.
position of the waste gate
supplied directly from position of servo motor
rev pick-up I
transmits the actual engine speed by the 5
airbox-temperature sensor O
conveys the prevailing air temperature in the airbox
plug connections } for one each warning and caution lamp
plug connection q for the 3-way solenoid valve
2 wires for an additional eletronic rev-counter w
PC interface e for reading the TCU data by a computer.
13
Reference
8
9
7
2
th
trigger coil on ignition housing
11
14
12
15
6
5
10
3
4
00139
Main Date
1997 02 01
914 F
Page
55