Geely EC718, EC718RV, EC715, EC715RV. Manual part — 54

Fuel injector operating voltage is provided by The Main Relay which is controlled by ECM. Battery voltage passes through the main
relay terminal No.3 to all fuel injector wiring harness connectors terminal No.1. ECM controls fuel injector ground circuit by ECM
harness connector EN01 terminal No.63. ECM monitors all fuel injector driver circuit status, if ECM detects driving circuit
corresponding voltage is incorrect, ECM will set up a fuel injector control circuit fault DTC code.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection Strategy

Conditions For Setting The DTC

(Control Strategy)

Fault Locations

P0202
P0264
P0265

Hardware Circuit Checks

1. Circuit Open.

2. Circuit Short to Ground.

3. Circuit Short to Power Supply.

1. Sensor Circuit

2. Sensor

3. ECM

3. Schematic:

12

From Battery

Cylinder No.2 Fuel Injector

Main Relay

Engine

Control

Module

FE02-5057b

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.

Step 1

Initial Inspection

Engine

Control System JL4G18-D

2-131

(a)

Check the fuel injector wiring harness connector for damage,
poor connection, aging or signs of loosening.

Next

Step 2

Measure the resistance of fuel injector assembly.

2

1

Cylinder No.2 Fuel Injector

FE02-5058b

(a)

Disconnect the fuel injector wiring harness connector EN12.

(b)

Measure resistance between the two fuel injector terminals.

Standard Resistance: 20°C (68 ºF) 11.5-12.5 Ω

(c)

Connect the fuel injector wiring harness connector EN12.

No

Replace fuel injector assembly. Refer to

2.2.8.2

Fuel Injector Replacement

Yes

Step 3

Measure fuel injectors working power supply.

1

2

Cylinder No.2 Fuel Injector Harness

Connector EN12

FE02-5059b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect cylinder No.1 fuel injector wiring harness
connector EN12.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure voltage between cylinder No.2 fuel injector wiring
harness connector EN12 No.1 terminal and a reliable ground.

Standard Voltage: 11-14 V

(e)

Connect cylinder No.2 fuel injector wiring harness connector
EN12.

Is voltage normal?

No

Go to step 5

Yes

Step 4

Check the fuel injector control circuit.

2-132

Control System JL4G18-D

Engine

1

2

Cylinder No.2 Fuel Injector Harness

Connector EN12

FE02-5060b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect cylinder No.1 fuel injector wiring harness
connector EN12.

(c)

Connect test lamp made from light-emitting diodes to the fuel
injector wiring harness connector EN12 terminal No.1 and
No.2.

(d)

Start the engine.

(e)

Check whether the test lamp is flashing as per normal.

Is test lamp flashing as per normal?

No

Go to step 6

Yes

Go to step 7

Step 5

Check and repair cylinder No.2 fuel injector power supply circuit.

G

1

2

5 3

1413 12 1110

5

1

2

3

4

6

7

8

9

J

L

K

I

G

D

C

B

E

F

A

86

86

30

87

85

86

86

87

87

87

30

30

30

85

85

85

2

2

3

3

5

5

1

1

1

2

5 3

1

2

5 3

86

87

30

1

1

2

5
3

2

5
3

85

EF01

EF21

EF18

EF25

EF20

EF29

EF06

EF02

EF30

EF17

EF19

EF23

EF22

EF26

EF24

EF08

EF27

EF28

EF05

EF07

EF16

EF04

EF03

EF15

EF12

EF10

EF1

1

EF09

EF13

EF14

EF32

EF31

1

2

Cylinder No.2 Fuel Injector Harness

Connector EN12

FE02-5061b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the fuel injector wiring harness connector EN12.

(c)

Remove the engine main relay.

(d)

Measure resistance between cylinder No.2 fuel injector
wiring harness connector EN12 terminal No.1 and engine
main relay terminal No.3.

(e)

Measure resistance between cylinder No.2 fuel injector
wiring harness connector EN12 terminal No.1 and a reliable
ground.

Test Items

Standard Value

EN12 (1) and Main Relay Terminal No.3

Less than 1 Ω

EN12 (1) and a Reliable Ground

10 kΩ or higher

(f)

Install the engine main relay.

(g)

Connect cylinder No.2 fuel injector wiring harness connector
EN12.

Exclude the fuel injector power supply circuit fault.

Next

Go to step 9

Step 6

Check cylinder No.2 fuel injector control circuit.

Engine

Control System JL4G18-D

2-133

1

3

5

7

8

6

4

2

9

10

11

12

13

23

24

25

26

27

28

29

30

37

51

52

53

54

55

56

57

58

59

60

61

62

63

64

38

39

40

41

42

43

44

45

46

47

48

49

50

31

32

33

34

35

36

14

15

16

17

18

19

20

21

22

ECM Harness Connector EN01

1

2

Cylinder No.2 Fuel Injector Harness

Connector EN12

FE02-5062b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect cylinder No.2 fuel injector wiring harness
connector EN12.

(c)

Disconnect ECM harness connector EN01.

(d)

Measure resistance between cylinder No.2 fuel injector
wiring harness connector EN12 terminal No.1 and ECM
harness connector terminal No.63. Check whether the circuit
is open. If there is no open circuit, repair the faulty part.

(e)

Measure resistance between cylinder No.2 fuel injector
wiring harness connector EN12 terminal No.1 and a reliable
ground. Check whether the circuit is short to ground. If there
is no short circuit, repair the faulty part.

(f)

Measure voltage between cylinder No.2 fuel injector wiring
harness connector EN12 terminal No.1 and a reliable ground.
Check whether the circuit is short to power supply. If there is
no short circuit, repair the faulty part.

Test Items

Standard

Value

Resistance Between EN12 (1) and EN01 (63)

Less than 1 Ω

Resistance Between EN12 (1) and a Reliable
Ground

10 kΩ or higher

Voltage Between EN12 (1) and a Reliable
Ground

0 V

Execute next step as per normal.

Next

Step 7

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 8

Replace ECM.

Next

Step 9

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.

(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.

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Control System JL4G18-D

Engine