Yamaha WaveRunner FZR-GX1800 Service Manual page 386

TRBL
SHTG
Diagnos-
Item
tic code
Steering
55 sensor
malfunction
Ex. manifold
water temp.
65
(*1)
sensor
malfunction
Reverse
(*2)
78 switch
malfunction
(*1)
: Thermo sensor
(*2)
: Reverse sensor
WD: Refer to the wiring diagram.
Engine unit troubleshooting
Symptom
Normal
operation
Normal
operation
Normal
operation
Checking steps
1. Check the steering sensor operation
using the YDIS.
2. Measure the steering sensor input
voltage.
3. Check the orange/red (O/R), white/
blue (W/L), and black/orange (B/O)
steering sensor wiring harness leads
for continuity.
1. Check the thermo sensor operation
using the YDIS.
2. Measure the thermo sensor input volt-
age.
3. Check the black/blue (B/L) and black/
orange (B/O) thermo sensor wiring
harness leads for continuity.
4. Measure the thermo sensor resis-
tance.
1. Check the reverse sensor operation
using the YDIS.
2. Measure the reverse sensor input volt-
age.
3. Check the orange (O), green/white (G/
W), and black/orange (B/O) reverse
sensor wiring harness leads for conti-
nuity.
9-11
E
Refer
to
page
7-36 1
7-36
WD
2
9-1
7-21
3
WD
7-21
4
7-37
7-37
5
WD
6
7
8