Yamaha R15 2022 Service Manual page 392

FUEL INJECTION SYSTEM TROUBLESHOOTING
Fault code No.
Item
3-1
1. Coolant temperature sensor
2. ECU
3. Sensor output lead
4. Sensor ground lead
3-2 Disconnect the ECU coupler from the ECU.
Disconnect the coolant temperature sensor coupler from the coolant temperature sensor.
3-3 [For P0117] Ground short circuit
Between coolant temperature sensor coupler and ground: green/red–ground
If there is continuity, replace the wire harness.
3-4 [For P0118] Open circuit
Between coolant temperature sensor coupler and ECU coupler: green/red–green/red
If there is no continuity, replace the wire harness.
P0117, P0118
[P0117] Coolant temperature sensor: short to ground circuit is de-
tected.
[P0118] Coolant temperature sensor: open or short to power circuit
is detected.
1
3
G R /
B L /
4
Ch Y/B B/R R/W L/G R/B
G Br R Lg/L W
B/Y L Lg/W W/B B/L B/W
8-59
2
G R /
B L /
V P/W Or/B W/Y B/L W/R Y
Y/R G/R Y/G Y/L B/L L B
Br/W Gy/G Y/W B/L B/L P/B Or
B
ELEC – +