Yamaha WaveRunner VXR VX1800A, Service Manual

Page: 30 / 318

Technical tips
1-25
ETV system
The F2W is equipped with the same throttle lever as that of the F2S.
The throttle lever has an APS which senses the degree of throttle opening and converts the status into
electronic signals, delivering the information to the ECM. The ECM controls the ETV based on the input
signals of the APS.
Employing the APS in the throttle lever has eliminated the need for throttle cables, reducing the number
of parts used, thereby improving throttle response and serviceability.
The throttle lever has 2 sensors as per the previous APS, the APS 1 and APS 2, which mutually diag-
nose any failures each system may encounter.
The APS full-close switch detects the fully closed throttle lever position.
A
3
B
1
2
4
5
6
4
5
APS 1
APS 2
b. Ground
5 V
b. Ground
5 V
b. Ground
APS 1
a. APS full close
switch
5 V
5 V
b. Ground
APS 2
5 V
b. Ground
C
D
A. Previous ETV system
B. New ETV system
C. Mechanical link
D. Electrical signal
1. Throttle lever
2. Throttle cable
3. APS
4. ECM
5. ETV
6. Electric throttle without wire cable
a. APS full-close switch
b. Ground