76-00-00
page 12
May 01/2007
Effectivity 912/914 Series
Edition 1 / Rev. 0
d02626
BRP-Rotax
Maintenance Manual
2.1.4) Three-way solenoid valve 3
The TCU also controls the 3-way solenoid valve, which causes various
pressures to become active on the float chamber of the carburetors.
For further information, see 73-00-00 sec. 2.8.
◆ NOTE: The solenoid valve is inactive below the threshold.
2.1.5) PC interface
The TCU incorporates a serial interface. By using a specially developed
program, all input and exit signals of the TCU can by monitored,
checked and if necessary recorded.
This program allows quick and efficient error diagnostics without having
to dismantle the complete control unit.
This program can monitor and record the operation of many elements,
including the 2 pressure sensors, temperature sensors, rev pickup,
throttle valve and wastegate position.
◆ NOTE: This system works “real time” i.e. if necessary also
during engine operation.
It allows the engineering staff to check and record TCU data during
flight.
These recordings can then be evaluated on a graph and facilitate
troubleshooting.
In addition, these recordings can be used as documentation for engine
repair and overhaul.
◆ NOTE: This communication program is not included in the
delivery range of the engine, but is readily available as
a spare part from the respective dealer.
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