Geely EC718, EC718RV, EC715, EC715RV. Manual part — 192

No

Refer to

2.12.7.14

DTC Code Index

Yes

Step 7

Inspect the exhaust system seal.

(a)

Check whether the three-way catalytic converter looks good
(signs of excessive heat and gasket missing, etc.).

(b)

Check whether the exhaust pipe is intact, whether the gasket
is intact.

No

replace the damaged parts. Go to step 15

Step 8

measure oxygen sensor signal circuit.

FE02-5354b

A

B

C

D

Post-catalytic Oxygen Sensor Harness
Connector EO03

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the oxygen sensor wiring harness connector
EO03.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure voltage between oxygen sensor wiring harness
connector EO03 terminal B and a reliable ground.

Standard Voltage Value: 0.35-0.5 V

(e)

Connect the oxygen sensor wiring harness connector EO03.

Is the voltage specified value?

No

Go to step 11

Yes

Step 9

Measure Post-Catalytic oxygen sensor ground circuit.

FE02-5355b

A

B

C

D

Post-catalytic Oxygen Sensor Harness
Connector EO03

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the oxygen sensor wiring harness connector
EO03.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure resistance between oxygen sensor EO03 terminal
A and a reliable ground.

Standard Resistance: Less than 1 Ω

(e)

Connect the oxygen sensor wiring harness connector EO03.

Is the resistance specified value?

No

Go to step 12

Yes

Step 10

replace the oxygen sensor.

Engine

Control System JL4G15-D

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Next

Go to step 15

Step 11

check Post-Catalytic oxygen sensor signal circuit.

FE02-5356b

1

17

33

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

A

B

C

D

Post-catalytic Oxygen Sensor Harness
Connector EO03

ECM Harness Connector EO01

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the oxygen sensor wiring harness connector
EO03.

(c)

Disconnect ECM harness connector EO01.

(d)

Measure resistance between oxygen sensor wiring harness
connector EO03 terminal B and ECM harness connector
terminal No.30. Check whether the circuit is open. otherwise,
repair the faulty part.

(e)

Measure resistance between oxygen sensor wiring harness
connector EO03 terminal B and a reliable ground. Check
whether the circuit is short to ground. otherwise, repair the
faulty part.

(f)

Measure voltage between oxygen sensor wiring harness
connector EO03 terminal B and a reliable ground. Check
whether the circuit is short to power supply. otherwise, repair
the faulty part.

Test Items

Standard Value

Resistance between EO03 (B) and EO01
(30)

Less than 1 Ω

Resistance between EO03 (B) and a reliable
ground

10 kΩ or higher

Voltage between EO03 (B) and a reliable
ground

0 V

normal

Go to step 13

Step 12

Check Post-Catalytic oxygen sensor ground circuit.

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Control System JL4G15-D

Engine

FE02-5357b

1

17

33

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

A

B

C

D

Post-catalytic Oxygen Sensor Harness
Connector EO03

ECM Harness Connector EO01

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the oxygen sensor wiring harness connector
EO03.

(c)

Disconnect ECM harness connector EO01.

(d)

Measure resistance between oxygen sensor wiring harness
connector EO03 terminal A and ECM harness connector
terminal No.55. Check whether the circuit is open. otherwise,
repair the faulty part.

(e)

Measure resistance between oxygen sensor wiring harness
connector EO03 terminal A and a reliable ground. Check
whether the circuit is short to ground. otherwise, repair the
faulty part.

(f)

Measure voltage between oxygen sensor wiring harness
connector EO03 terminal A and a reliable ground. Check
whether the circuit is short to power supply. otherwise, repair
the faulty part.

Test Items

Standard Value

Resistance between EO03 (A) and EO01 (55)

Less than 1 Ω

Resistance between EO03 (A) and a reliable
ground

10 kΩ or higher

Voltage between EO03 (A) and a reliable
ground

0 V

Execute next step as per normal.

Next

Step 13

Check ECM power supply circuit.

(a)

Check whether ECM power supply circuit is normal.

(b)

Check whether ECM ground circuit is normal.

No

Repair the faulty part.

Yes

Step 14

Replace ECM.

(a)

Replace ECM. Refer to

2.2.8.8

Engine Control Module

Replacement

.

(b)

Carry out crankshaft position sensor self learn. Refer to

2.12.7.11

Crankshaft Position Sensor (CKP) Learn

.

Next

Step 15

Use scan tool to confirm whether the DTC code is stored again.

(a)

Connect scan tool to the datalink connector.

(b)

Turn the ignition switch to "ON" position.

(c)

Clear DTC code.

(d)

Start and run the engine at idle speed to warm up the engine
for at least 5 min.

Engine

Control System JL4G15-D

2-685

(e)

Road test the vehicle for at least 10 min.

(f)

Read control system DTC code again to confirm that the
system has no DTC code.

No

Intermittent Fault. Refer to

2.2.7.3

Intermittent

Fault Check

Yes

Step 16

Diagnostic completed.

5. Repair Instructions:

Replace the Post-Catalytic oxygen sensor. Refer to

2.4.7.1

Post-Catalytic Oxygen Sensor Replacement

.

2.12.7.25 DTC P0141

1. DTC Descriptor:

DTC

P0141

Post-Catalytic oxygen sensor heater malfunction

Heated Post-Catalytic Oxygen Sensor (HO

2

S) is used to monitor the three-way catalytic converter working status. The sensor

compares the oxygen content in ambient air and oxygen content in the exhaust flow. Each heated oxygen sensor has an internal
heating element. ECM controls the heated oxygen sensor heating control circuit. This makes the system enter the closed-loop system
earlier, so that ECM will calculate Air-Fuel ratio earlier. ECM controls the heating control circuit switched on or off, so that heated
oxygen sensor working temperature maintains in the specified range. ECM measures the heater current to determine the
temperature.

The Post-Catalytic oxygen sensor heating coil voltage is provided by The Main Relay controlled by ECM. When the ignition switch
is turned to "ON", Post-Catalytic oxygen sensor connector EO03 terminal D will have battery voltage. ECM controls the heater
working hours by ECM harness connector EO01 terminal No.46.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection

Strategy

Conditions For Setting The DTC (Control Strategy)

Fault Locations

P0141

Hardware Circuit
Checks

1. Engine Running Longer Than 60 s.

2. Idle Running Condition.

3. Post-Catalytic Oxygen Sensor Heating.

4. Post-Catalytic Oxygen Sensor Heating Control Terminal

Circuit Open.

5. Duration Less Than 20 s.

1. Sensor Circuit

2. Sensor

3. ECM

3. Schematic:

Refer to

2.12.7.24

DTC P0137 P0138 P0140

.

4. Diagnostic Steps:

Note

Before carrying out this diagnosis step, observe the data list on scan tool and analyze the accuracy of the data, as
these will help with quick diagnosis.

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Control System JL4G15-D

Engine