Yingang YG48Q-5A, Maintenance Manual

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YG48Q-5A Maintenance ManualEngine management system
152
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.
Yes Harness issue
No Next
6
crank the engine and stay
idle. Check whether the ‘engine temperture’ goes
high when engine get warm.
Yes Help
No Change the sensor
Malfcode
：
P0122
Information
：
TPS Circuit Low Voltage or Open
ITEM OPERATION RESULT NEXT STEP
1 Connect the diagnostic tool, and ignition on. Next
2
Check whether the data of
‘Throttle opening’ is bettwen 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
gound or open: 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
Malfcode
：
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
Malfcode
：
P0131/P0132
Information
：
O2S 1 Circuit Low/High Voltage
ITEM OPERATION RESULT NEXT STEP
1
Connect the diagnostic tool, and ignition on. Next
2
Use multimeter to check whether the connection between pin B of the
oxygen sensor and pin J2-17 of the ECU is open, and whether the pin B of
sensor is short to pin A.
Yes Harness issue
No Next
3
Crank the engine and stay idle. Whent the engine gets warm, use
multimeter to check whether the voltage between pin A and B keeps
jumping between 100-900mV.
Yes Help
No Next
4
A
、
Emission pipe: block/leakage or not.
Yes Engine