Yamaha MBK X-MAX 300 2017 Service Manual page 350

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
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.
1
3
G/R
B/L
4
G/R B/L
G/Y P
G/R B/L
Sb Gy
L/B
8-45
FUEL INJECTION SYSTEM
2
5V
G/R
B/L
L L R/W W Br/R B/L O/B B/L Y/B B/W
L/Y G/R Y Y/G L/R B/L W/Y
Y/L B/W P/W Br/W Gy/R R/B B/L W/R B W/B O