Lifan 620. Manual — part 11

II. LF TRITEC Engine

1. DTC: P0112, Intake Air Temperature Sensor Temperature Too Low (see Table 1-14)

Table 1-14

S/N Operation Test

Results

Actions

1

Connect the diagnostic instrument and adapter, and turn the

ignition switch to ON.

Next

step

2

3

4

5

6

45

2. DTC: P0113, Intake Air Temperature Sensor Temperature Too High (see Table 1-15)

Table 1-15

S/N Operation Test

Results

Actions

1

Connect the diagnostic instrument and adapter, and turn

the ignition switch to ON.

Next

step

Yes

Go to step 5

2

Check the “intake air temperature” as per the data flow.

3

4

5

6

46

3. DTC: P0117, Engine Coolant Temperature Sensor Temperature Too Low (see Table 1-16)

Table 1-16

S/N Operation Test

Results

Actions

1

Connect the diagnostic instrument and adapter, and turn the

ignition switch to ON.

Next

step

Yes

Go to step 6

2

Check the “coolant temperature” as per the data flow. Does it

match with the temperature of the engine (related to the

temperature of the engine at that moment)?

Note: If the temperature is often -40 , open circuit may occur.

℃

No Next

step

3

4

5

1

2

3

4

Measure the voltage between pin 1# and pin 2# with a

multimeter. Is the voltage about 5V?

No Next

step

Yes

Repair or replace

harness

5

Check for short to ground between pin 39#, 35# of the ECU

and the pin 1#, 2# of the sensor with a multimeter.

No Next

step

Yes Diagnosis

help

6

Start the engine, and keep idle speed. Check the “coolant

temperature” on the diagnostic instrument. At this moment, the

temperature will increase with the rise of the engine coolant

temperature.

No Replace

sensor

47

5. DTC: P0122, Throttle Position Sensor Circuit Voltage Too Low (see Table 1-18)

Table 1-18

S/N Operation Test

Results

Actions

1

Connect the diagnostic instrument and adapter, and turn the

ignition switch to ON.

Next

step

Yes Next

step

2

Check the “throttle absolute openning” as per the data flow.

Does it within 4%-10% (related to vehicle model)?

No

Go to step 5

Yes Next

step

3

Step on the accelerator, and check the “throttle absolute

4

5

6

1

2

3

4

Yes

harness

5

Check for open circuit or short to power supply between pin

17#, 32#, 16# of the ECU and the pin 1#, 2#, 3# of the sensor

with a multimeter.

No Next

step

Yes Replace

sensor

6

Measure the voltage between pin 1# and pin 2# with a

multimeter. Is the voltage about 5V?

No Diagnosis

help

48