2008 Yamaha WaveRunner FX SHO / FX Cruiser SHO Service Manual, Page 315Get this manual
Control system
Steering sensor
1Check: Steering sensor operation Does not operate Measure the steering sensor input voltageChecking steps: 1Connect computer to the watercraft to use the YDIS2Turn the handlebar all the way to the left or right3Install plastic tie loosely around the center of the handlebar grip as shown4Hook spring gauge onto the plastic tie 15Push the unlock button6Hold the spring gauge at 90 angle from the handlebar grip, and then pull the spring gauge in direction as shown with force of 10 kgf (22 lb)NOTE: At this time, the button in the steering sensor will be pushed in direction 7Check that the following is displayed in the "Engine monitor" window of the YDISSteering sensor operation: Handlebar Not pulled Pulled YDIS display OFF ON