um CHILL 125 cc. Service Manual page 31

Malfunction code：P0118
Information：Coolant/Oil Temperature Sensor Circuit High Voltage or Open
ITEM OPERATION
1 Connect the diagnostic tool, and ignition on.
2 Check whether the data of 'engine temperature' equals to the real temperature.
3 Remove the connector and use the multimeter to check whether the resistance
between pin A and C of the sensor is reasonable according to the temperature.
4 Use the multimeter to measure whether the voltage between A and C is about 5V.
5 Check whether the following pins are short to battery or open: J2-10, J2-14 of the
ECU and pin C and D of the sensor.
6 Crank the engine and stay idle. Check whether the 'engine temperature' goes high
when engine get warm.
CHILL 125 cc. SERVICE MANUAL AND EFI DIAGNOSTIC
RESULT
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
NEXT STEP
next
Step 5
Next
Step 5
Next
Next
Check the harness
Harness issue
Next
Help
Change the sensor
31