Yamaha MBK X-MAX 300 2017, Service Manual

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FUEL INJECTION SYSTEM
8-45
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.
Fault code No. P0117, P0118
Item
No normal signals are received from the coolant temperature sensor.
[P0117] Coolant temperature sensor: ground short circuit detected.
[P0118] Coolant temperature sensor: open or power short circuit de-
tected.
G / R
B / L
G / R
B / L
5 V
1
2
3
4
B / L G / R
B / L G / R
B / L Y / B B / W G / Y P O / B R / W W Br / R B / L L L
W / Y Sb
Gy B / L
Y Y / G L / R
G / R L / Y
W / R B W / B O L / B Br / W Gy / R R / B B / L P / W Y / L B / W