Geely Emgrand X7. Manual part — 55

(d) Start

the

engine.

(e) Observe whether test lamp is flashing.

Is test lamp flashing as normal?

Step 5

Inspect and repair cylinder No.1 fuel injector power supply circuit.

(a) Rotated ignition switch to OFF

position .

(b) Disconnect the fuel injector

wiring harness connector EM14.

(c) Dismantle the engine main relay.

(d) Measure resistance between

cylinder No.1 fuel injector wiring
harness connector EM14 terminal
No.B and engine main relay
terminal No.30.

ER03

85

86

87

30

30

87

86

85

ER05

30

87

86

85

ER06

30

87

87a

86

85

ER11

ER08

ER0

9

85

86

87

30

ER10

2

1

5

3

2

1

5

3

2

1

5

3

ER04

ER02

2

1

5

3

2

1

5

3

ER01

ER07

2

1

5

3

1

2

3

4

11

12

13

14

15

16

5

6

7

8

9

10

EF0

8

EF0

7

EF2

7

EF2

6

EF2

2

EF2

9

EF0

3

EF0

6

EF0

9

EF2

5

EF1

7

EF1

6

EF1

5

EF3

5

EF2

1

EF1

4

EF

01

EF

02

EF

04

EF

10

EF

1

1

EF1

8

EF2

4

NL02-0045c

(e) Measure resistance between cylinder No.1 fuel injector wiring harness connector EM14

terminal No.B and a reliable ground.

(f) Install the engine main relay.

(g) Connect cylinder No.1 fuel injector harness connector EM14.

Exclude the fuel injector power supply circuit fault.

Test Items

Standard Value

Resistance Between EM14 (B) and Main Relay Terminal No.30

Less than 1 Ω

Resistance Between EM14 (B) and A Reliable Ground

10 kΩ or higher

Step 6

Inspect the Cylinder #1 fuel injector control circuit.

(a) Rotated ignition switch to OFF position .

(b) Disconnect cylinder No.1 fuel injector wiring harness connector EM14.

(c) Disconnect ECM harness connector EM01.

Go to step 6

Go to step 7

No

Yes

Go to step 9

Next

219

(d)

Measure resistance between
cylinder No.4 fuel injector wiring
harness connector EM01 terminal
No.A and ECM harness
connector terminal No.6. Inspect
whether the circuit is open. If
there is no open circuit, repair the
faulty part.

(e) Measure resistance between

cylinder No.1 fuel injector wiring
harness connector EM14 terminal
No.A and a reliable ground.
Inspect whether the circuit is
short to ground. Otherwise, repair
the faulty part.

ECM线束连接器

EM01

1

2

4

5

3

81

63

44

25

6

62

43

24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

9

8

7

26

42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27

45

46

61 60 59 58 57 56 55 54 53 52 51 50 49 48 47

64

65

66

80 79 78 77 76 75 74 73 72 71 70 69 68 67

NL02-0033c

(f) Measure voltage between cylinder No.1 fuel injector harness connector EM14 terminal No.A

and a reliable ground. Inspect whether the circuit is short to power supply. Otherwise, repair
the faulty part.

Test Items

Standard Value

Resistance Between EM14 (A) and EM01 (6)

Less than 1 Ω

Resistance Between EM14 (A) and a Reliable Ground

10 kΩ or higher

Voltage Between EM14 (A) and a Reliable Ground

0V

Execute next step as per normal.

Step 7

Inspect the ECM Power Supply Circuits.

(a) Inspect whether ECM power supply circuit is normal.

(b) Inspect whether ECM ground circuit is normal.

Step 8

Replace ECM

Refer to 2.2.7.11 Crankshaft Position Sensor (CKP) Learn to carry out the crankshaft position
sensor learn after replacing the ECM.

Step 9

Use a fault diagnosis tester to confirm whether the DTC Code is stored again.

(a) Connect fault diagnosis tester to the diagnostic interface.

(b) Turn ignition switch to ON position.

Next

No

Repair the faulty part.

Yes

Next

ECMharness connectorEM01

220

(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.

Step 10

Troubleshooting

5. Maintenance

guide

:

Refer to 2.3.8.5 “Replacement of Fuel Injectors” to replace the fuel injectors

No

Refer to 2.2.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

221

2.2.7.30 DTC P0264 P0265

1. DTC

description:

DTC P0264

Cylinder No.2 Fuel Injector Circuit Low Voltage Fault

DTC P0265

Cylinder No.2 Fuel Injector Circuit High Voltage Fault

Fuel injectors operating voltage is provided by The Main Relay controlled by ECM. Battery
voltage passes through the main relay terminal No.3 to all fuel injector wiring harness connectors
terminal No.A. ECM controls fuel injector ground circuit by ECM harness connector EM01
terminal No.8. ECM monitors all fuel injector driver circuits status, if ECM detects driving circuit
status corresponding voltage is incorrect, ECM will set 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

P0264

Hardware Circuit
Inspection

Injector Signal Circuit Open or
Short To Ground

P0265

Hardware Circuit
Inspection

Injector Signal Circuit Short To
Power Supply

1.

Sensor

Circuit

2. Sensor

3. ECM.

3. Circuit

sketch

主继电器ER09

87

30

86

85

EM01

44

EM01

B

A

发

动
机

控

制

模
块

蓄电池

EF4

0

EF22

1缸喷油器

3缸喷油器

4缸喷油器

2缸喷油器

6

MPR

INJA

EM01

B

A

7

INJB

EM01

B

A

25

INJC

EM01

B

A

8

INJD

NL02-0043c

Main relay ER09

Battery

1st cyinder oil

injecter

3rd cyinder oil

injecter

4th cyinder oil

injecter

2nd cyinder

oil injecter

Engi

ne

co

ntr

ol mo

dul

e

222