Yamaha WaveRunner FX SHO Service Manual page 423

TRBL
ANLS
Engine unit trouble analysis
Diagnos-
Item
tic code
Electronic
112
throttle
113
(*1)
system
114
malfunction
Electronic
115 throttle
(*1)
116 system
malfunction
Electronic
117
throttle
118
(*1)
system
119
malfunction
Electronic
throttle
121
(*1)
system
malfunction
Electronic
throttle
122
(*1)
system
malfunction
(*1)
: Throttle body assembly
WD: Refer to the wiring diagram.
Symptom
1. Check the TPS output voltage and
throttle valve opening using the YDIS.
2. Check the ECM circuit for continuity.
3. Check the ETV relay for continuity.
4. Check the charging system.
• Stator coil output peak voltage
• Stator coil resistance
Engine speed
• Rectifier regulator output peak voltage
is limited
• Rectifier regulator continuity
5. Check the fuse for continuity.
6. Check the battery voltage and specific
gravity.
7. Check the red and black (R and B)
power supply circuit cables and leads
for continuity.
1. Check the pink, orange, pink/black,
and black/orange (P, O, P/B, and B/O)
throttle body assembly wiring harness
leads for continuity.
Engine speed
is limited
2. Check the TPS output voltage and
throttle valve opening using the YDIS.
3. Check the throttle shaft and throttle
inner surface for wear or damage.
1. Check the throttle body assembly cou-
pler terminals for rust and corrosion.
2. Check the green and blue (G and L)
Engine speed
is limited throttle body assembly wiring harness
leads for continuity.
3. Check the ECM circuit for continuity.
1. Cross-check the ECM or replace.
Engine speed
is limited
1. Cross-check the throttle body assem-
Engine speed
bly.
is limited
9-12
Checking steps
E
Refer
to
page
7-28
1
7-42
7-35
2
7-15
7-15
7-17
7-17
7-47
3
3-19
WD
WD 4
7-28
5
5-38
—
WD
6
7-42
—
7
—
8
9