Rotax 912 Series Maintenance Manual page 336

Effectivity 914 Series
Edition 1 / Rev. 0
BRP-Rotax
Maintenance Manual
The electronic regulator (4) TCU (Turbo Control Unit) is the "central
processing unit" as the junction of all engine parameter inputs. For
functioning of the TCU, the following sensors e.g. trigger coils are
required.
- Airbox pressure sensor (5)
provides the actual boost pressure in the airbox
- Ambient pressure sensor (6)
conveys the prevailing ambient pressure
- Throttle valve position sensor (7)
supplies actual position of carburetor throttle valve.
◆ NOTE:
The target boost pressure is determined from the
inputs of the sensors (5) - (7).
- Position of the wastegate
supplied indirectly from position of servo motor
- Rev counter signal (8)
transmits the actual engine speed via the 5
housing
- Airbox temperature sensor (9)
conveys the prevailing intake air temperature in the airbox
All the sensors are connected with the TCU via a common wiring
harness (10). In addition to the voltage supply (11) for the TCU, the
following connections are provided on the wiring harness:
- plug connections (12), each for one warning and one boost lamp
- plug connection (13) for the three-way solenoid valve
- 2 wires for an additional electronic rev counter (14)
- PC interface (15) for reading the TCU data via computer.
th
sensors on the ignition
76-00-00
page 4
May 01/2007