Yamaha WaveRunner FX SHO, Service Manual

Page: 306 / 433

E
ELEC
– +
7-29
1. Check:
• Throttle valve opening
• TPS output voltage
Out of specification
→
Measure the TPS
input voltage.
Checking steps:
NOTE:
When checking the TPS using the YDIS, do
not start the engine.
1. Connect a computer to the watercraft and
use the YDIS to display “ Throttle position
sensor 1, ” “ Throttle valve opening, ” and
“ Throttle position sensor 2. ”
NOTE:
TPS 1 and TPS 2 are components of the elec-
tronic throttle valve, which cannot be disas-
sembled.
2. Squeeze the throttle lever slowly and
check that the displayed throttle valve
opening increases.
3. Check that the APS pulley stopper
a
con-
tacts the fully closed stopper
b
when the
throttle lever
1
is at the fully closed posi-
tion
È
.
NOTE:
To adjust the throttle cable, refer to “ Throttle
lever free play check and adjustment ” in Chap-
ter 3.
4. Push the unlock button, and then check
the TPS 1 output voltage and throttle valve
opening angle at the fully closed position
È
.
TPS 1 output voltage with throttle
lever fully closed:
0.6 – 0.9 V
Throttle valve opening angle with
throttle lever fully closed:
2.0 – 8.0 °
b
a
È
É
1
Control system