CHILL 125 cc. SERVICE MANUAL AND EFI DIAGNOSTIC
33
Malfunction code
：
P0123
Information
：
TPS Circuit High Voltage
ITEM
OPERATION
RESULT
NEXT STEP
1
Connect the diagnostic tool, and ignition on.
next
2
Check whether the data of ‘Throttle opening’ is between 0 % - 1 %.
Yes
Step 5
No
Next
3
Open the throttle to 100% slowly, check whether the data of ‘throttle opening’ goes
to between 90%-100%.
Yes
Step 5
No
Next
4
Repeat Step 3, check whether the data jumps when open the throttle slowly.
Yes
Change the sensor
No
Next
5
Remove the connector and check whether the following pins are short to battery:
J2-12, J2-16 of ECU and pin A and C of the sensor.
Yes
Harness issue
No
Next
6
Use multimeter to check whether the voltage between pin A and B is about 5V.
Yes
Help
No
Step 5
