Dtc: P0122, Throttle Position Sensor Circuit Voltage Too Low; Dtc: P0123, Throttle Position Sensor Circuit Voltage Too High - Lifan 620 Maintenance Manual

5. DTC: P0122, Throttle Position Sensor Circuit Voltage Too Low (see Table 1-18)
S/N
Connect the diagnostic instrument and adapter, and turn the
1
ignition switch to ON.
Check the "throttle absolute openning" as per the data flow.
2
Does it within 4%-10% (related to vehicle model)?
Step on the accelerator, and check the "throttle absolute
openning" as per the data flow. Does it increase to about
3
85-95% with the widening of the throttle opening (related to
vehicle model)?
Repeat step 3, and check the "throttle absolute openning" as
4
per the data flow. Does jump occur during the process?
Disconnect the throttle position sensor from the harness.
5 Check for short to ground between pin 17#, 32#, 16# of the
ECU and the pin 1#, 2#, 3# of the sensor with a multimeter.
Measure the voltage between pin 1# and pin 2# with a
6
multimeter. Is the voltage about 5V?
6. DTC: P0123, Throttle Position Sensor Circuit Voltage Too High (see Table 1-19)
S/N
Connect the diagnostic instrument and adapter, and turn the
1
ignition switch to ON.
Check the "throttle absolute openning" as per the data flow.
2
Does it within 4%-10% (related to vehicle model)?
Step on the accelerator, and check the "throttle absolute
openning" as per the data flow. Does it increase to about
3
85-95% with the widening of the throttle opening (related to
vehicle model)?
Repeat step 3, and check the "throttle absolute openning" as
4
per the data flow. Does jump occur during the process?
Disconnect the throttle position sensor from the harness.
Check for open circuit or short to power supply between pin
5
17#, 32#, 16# of the ECU and the pin 1#, 2#, 3# of the sensor
with a multimeter.
Measure the voltage between pin 1# and pin 2# with a
6
multimeter. Is the voltage about 5V?
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Table 1-18
Operation
Table 1-19
Operation
48
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Test Results Actions
Next step
Yes Next step
No Go to step 5
Yes Next step
No Go to step 5
Yes Replace sensor
No Next step
Repair or replace
Yes
harness
No Next step
Yes Replace sensor
No Diagnosis help
Test Results Actions
Next step
Yes Next step
No Go to step 5
Yes Next step
No Go to step 5
Yes Replace sensor
No Next step
Repair or replace
Yes
harness
No Next step
Yes Replace sensor
No Diagnosis help