Geely Emgrand X7. Manual part — 54

Step 4

Inspect ECM Power Supply Circuit and ground circuit.

Step 5

Replace ECM. Refer to 2.2.8.1 Replacement of Engine Control Module.

Step 6

Carry out the crankshaft position sensor learning, refer to 2.2.7.11 “Crankshaft
Position Sensor (CKP) Learning.

Step 7

Use fault diagnosis tester to confirm if DTC is stored again .

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

(b) Turn 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) Test the vehicle on the road for at least 10 min.

(f) Read control system DTC code again.

Verify that the system has no DTC code output.

Step 8

Troubleshooting

5. Maintenance

guide

:

Electronic throttle body (ETC) can only be replaced as an assembly. Do not disassemble it and
repair. Refer to 2.6.8.5 Replacement of Electronic Throttle Body for the replacement of ETC.

No

Refer to 2.2.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

Next

Next

No

Power and ground circuits fault.

Yes

215

2.2.7.28 DTC P0230

1. DTC

description:

DTC P0230

Fuel Pump Relay Fault

The power pump relay coil working voltage is provided by ECM. ECM provides power through
ECM harness connector EM01 terminal No.71 to pump relay terminal No.1. The fuel pump is
grounded through the terminal No.2, fuel pump relay pull-in. ECM has an internal detection
circuit. By monitoring the feedback voltage ECM determines whether the control circuit is open,
short to ground or short to voltage.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection
Strategy

Conditions For Setting The DTC
(Control Strategy)

Fault Locations

P0230

Hardware
Circuit
Inspection

Fuel Pump Relay Control Circuit Short to
Power Supply or Ground or Open

1. Relay

Circuit

2. Relay

3. ECM.

3. Circuit

sketch

10

FPR

EM01

44

MPR

EM01

发

动

机
控

制

模

块

蓄电池

EF40

EF25

油泵继电器ER10

燃油泵单元

2

1

5

3

主继电器ER09

86

85

87

30

M

3

4

EF21

NL02-0042c

4. Diagnostic

Steps:

Refer to 2.3.2 “Description and Operation” and 2.3.3 “ Operating Principle” to inspect the fuel
pump relay circuit.

Main relay ER09

Battery

Oil pump relay ER10

Fuel pump unit

Engi

ne

co

ntr

ol mo

dul

e

216

2.2.7.29 DTC P0261 P0262

1. DTC

description:

DTC P0261

Cylinder No.1 Fuel Injector Circuit Low Voltage Fault

DTC P0262

Cylinder No.1 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.1. ECM controls Cylinder No.1 fuel injector internal ground circuit through ECM
harness connector EM01 terminal No.6. 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

P0261

Hardware
Circuit
Inspection

Injector Signal Circuit Open or
Short To Ground

P0262

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

4. Diagnostic

Steps:

Note: Before carrying out this diagnosis step, observe the data list on fault diagnosis tester and
analyze the accuracy of the data, as these will help with quick diagnosis.

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

217

Step 1

Initial Inspection

(a) Inspect the fuel injector harness connector for damage, poor connection, aging or signs of

loosening

Step 2

Measure the fuel injector resistance.

(a) Disconnect the fuel injector

wiring harness connector EM14.

(b) Measure resistance between the

two fuel injector terminals.

Standard Resistance

11.4-12 . 6Ω @ 20 (68 )

℃

℉

(c) Connect the fuel injector harness

connector EM14.

喷油器1线束连接器 EM14

B

A

NL02-0044c

(a) Rotated ignition switch to OFF position .

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

(c) Rotated ignition switch to ON position .

(d) Measure voltage between cylinder No.1 fuel injector wiring harness connector EM14

terminal No.2 and a reliable ground.

Standard Voltage: 11-14V

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

4

Inspect the fuel injector control circuit.

(a) Rotated ignition switch to OFF position .

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

(c) Connect a light-emitting diodes test lamp to the fuel injector wiring harness connector EM14

terminal No.1 and 2.

Step 3

Measure Fuel Injectors Working power supply

No

Go to step 5

Yes

No

Refer to 2.2.8.2 “Replacement of Fuel
Injectors” to replace the fuel injectors

Yes

Next

Oil injecter 1harness connectorEM14

218