CHILL 125 cc. SERVICE MANUAL AND EFI DIAGNOSTIC
28
Malfunction code
：
P0112
Information
：
IAT Circuit Low Voltage
ITEM
OPERATION
RESULT
NEXT STEP
1
Connect the diagnostic tool, and ignition on.
NEXT STEP
2
Check whether the data of ‘intake air temperature’ equals to the real intake air
temperature.
Yes
Step 5
No
Next
3
Remove the connector, and use the multimeter to check whether the resistance
between pin B and D is reasonable according to the temperature.
Yes
Step 5
No
Next
4
Remove the connector and check whether the voltage between pin B and D is about
5V.
Yes
Next
No
Check harness
5
Check whether the following pins are short battery: J2-8, J2-10 of the ECU and pin C,
D of the connector.
Yes
Change the harness
No
Next
6
Crank the engine and stay idle. Check whether the ‘intake air temperature’ goes up
when the engine temperature goes up.
Yes
Help
No
Change the sensor.
