jcb JS 200 Series, Service Manual

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4 - 8
Section C
Electrics
9803/6400
Section C
4 - 8
Issue 1
Engine Control
Redundancy (Back-up) throttle control
If the throttle control does not operate due to a controller defect, press the redundancy switch. Throttle control is then taken over
by the manual throttle buttons.
When pressing a redundancy switch, control power supply to the controller is turned OFF , and the manual throttle circuit is
activated. There is a signal of
5V
on the motor driver side. When pressing manual throttle, instruction of a rotational direction is
sent to a motor driver, same method as in previous section Controller rotational instructions.
To stop engine, manual throttle is pressed DOWN , or the key switch is turned OFF .
While running the engine, if the redundancy switch is turned OFF (normal status), the engine stops so that the 0 position of
throttle motor is detected.