Off-Throttle Steering (Ots) Control - Yamaha WaveRunner FX SHO Service Manual

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INFO

Off-throttle steering (OTS) control

Off-throttle steering (OTS) system operates as follows:
1. The engine speed is maintained above 4,000 r/min for a few seconds.
2. The APS detects when the throttle lever is completely released.
3. The steering sensor detects on when the handlebar is turned sharply to the right or left and is
applied load.
4. The ECM sends a signal to the throttle body assembly.
5. The ETV is operated and air is introduced into the intake manifold.
6. The ECM controls the opening of the ETV to provide forward thrust and steering.
1
9
1 Steering sensor
2 Steering shaft
3 TPS
4 Throttle body assembly
5 DC-motor
6 Pickup coil
7 Flywheel magneto
8 ECM
9 Handlebar
Start the engine and operate it for several seconds with the engine speed above 4,000 r/min.
Release the throttle lever, and then fully turn the handlebar to the left or right. The ECM will send a
signal to the DC motor of the throttle body assembly to open the ETV, raising the engine speed.
Technical tips
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