Geely Emgrand X7. Manual part — 427

8.2.7.8 A/C does not work

Circuit diagram:

Refer to 8.2.6.2 A/C System Circuit Diagram

Diagnostic steps:

1

Carried out A/C self- inspection process

(a) Carried out A/C self- inspection process, refer to8.2.7.5 Self- inspection controller.

(b) Repair and check all indicator faults by self

Does the A/C clutch operate normally?

2 Perform

the

maintenance

procedures according to the symptom list.

A. Repair according to the following list of symptoms

Symptoms

Suspected fault part

Maintenance scheme

The engine
coolant
temperature is too
low.

1. ECT sensor fault
2. ECT sensor harness fault
3. Engine cooling system work is in big

circulation state

4. ECM

malfunction

1. Repair

ECT

harnesses

2. Replacement
3. Replace

the

thermostat

4. Overhaul

ECM

,if

necessary ,replace

Abnormal A/C
pressure switch
signal

1. Pressure switch shows signal that A/C

pressure doesn't meet standard value

2. Pressure switch harnesses fault.
3. ECM

malfunction

1. Repair harnesses of pressure

switch

2. Replace

pressure

switch.

3. Overhaul

ECM

,if

necessary ,replace

Outdoor
temperature sensor
signal is abnormal.

1.

Outdoor temperature sensor shows
temperature lower than 4℃.

2. Fault of outdoor temperature sensor

harnesses.

3. A/C control module fault

1. Repair harnesses of outdoor

temperature sensor

2. Replace outdoor temperature

sensor

3. Overhaul A/C control module, if

necessary,replacet

Evaporator
temperature sensor
signal is abnormal.

1. Evaporator temperature sensor display

temperature below 2℃(35.6℉)

2. Evaporator

temperature sensor harness fault

3. A/C control module fault

1. Evaporator

outdoor

temperature

sensor harness

2. Replace evaporator termperature

sensor.

3. Overhaul A/C control module, if

necessary,replacet

Refrigerant
pressure is
abnormal

1. A/C high-presure exceeds 3.14MPa

(455.4psi)

2. Low pressure of A/C is less than

0.196MPa(28.4psi)

1. Residual refrigerant added during

emission.

2. Repair fault which caused

vehicle's bad radiation.

3. Bad working condition of engine.

No

Yes

The system is normal.

1707

4. Inspect and repair fault which air

conditoning system is blocked.

5. Detecting and Eliminating

Leakage in A/C System

A. Confirm the completion of the malfunction elimination.

Does the A/C clutch operate normally?

3

Check compressor fuse

(a) Inspect compressor fuse EF09.

Fuse rated value:10A

Whether fuse is broken or not?

NL08-2020b

ER03

85

86

87

30

30

87

86

85

ER05

30

87

86

85

ER06

30

87

87a

86

85

ER11

ER08

ER09

85

86

87

30

4

ER10

2

1

5

3

4

2

1

5

3

4

2

1

5

3

ER04

4

ER02

2

1

5

3

4

2

1

5

3

ER01

ER07

4

2

1

5

3

1

2

3

4

11

12

13

14

15

16

5

6

7

8

9

10

EF

0

8

EF

0

7

EF

2

7

EF

2

6

EF

2

2

EF

2

9

EF

0

3

EF

0

6

EF

0

9

EF

2

5

EF

1

7

EF

1

6

EF

1

5

EF

3

5

EF

2

1

EF1

4

EF0

1

EF0

2

EF0

4

EF1

0

EF1

1

EF1

8

EF2

4

4

Repair the compressor clutch power supply circuit.

A. Service whether the power supply line of the compressor clutch is short circuited to the ground.

Does the A/C clutch operate normally?

5

Detect the voltage of the power end of the compressor clutch.

No

Yes

The system is normal.

Yes

No

Go to step 5

No

Yes

The system is normal.

1708

A. Start the engine and press the A/C control switch
(A/C switch) to test the voltage of the supply terminal
EN06-1 of the compressor clutch.

Standard Voltage: 11-14 V

Is voltage the Standard Value?

NL08-2005b

EN06压缩机线束连接器

1

6

Repair the compressor clutch power supply circuit.

(a) Turn the ignition switch to OFF position.

(b) Disconnect engine hood fuse box harnesses

connector EN25.

(c) Disconnect compressor clutch harnesses

connector EN06.

(d) Inspect engine hood fuse box harnesses

connector EN25 terminal 6 and compressor.

Open circuit between terminalS1 of the clutch
harnesses connector EN06.

NL08-2006b

EN25发动机舱保险丝盒线束连接器

1

2

3

4

5

6

7

8

9

10

11 12 13 14 15 16

(e) Make sure that engine hood fuse box harnesses

connector EN25 terminal 6 and compressor.

Circuit between terminalS1 of the clutch harnesses
connector EN06 is normal.

Standard Resistance: less than 1 Ω

Does the A/C clutch operate normally?

NL08-2005b

EN06压缩机线束连接器

1

No

Yes

Replace compressor clutch

EN06compressorharness connector

EN25 engine compartment fuse box harness

connector

EN06compressorharness connector

1709

7

Inspect and adjust the A/C relay, and replace if necessary.

(a) Check if. Adjusting A/C electrical.if ensure.

place it.

Does the A/C clutch operate normally?

NL08-2037b

ER03

85

86

87

30

30

87

86

85

ER05

30

87

86

85

ER06

30

87

87a

86

85

ER11

ER08

ER09

85

86

87

30

4

ER10

2

1

5

3

4

2

1

5

3

4

2

1

5

3

ER04

4

ER02

2

1

5

3

4

2

1

5

3

ER01

ER07

4

2

1

5

3

1

2

3

4

11

12

13

14

15

16

5

6

7

8

9

10

EF

0

8

EF

0

7

EF

2

7

EF

2

6

EF

2

2

EF

2

9

EF

0

3

EF

0

6

EF

0

9

EF

2

5

EF

1

7

EF

1

6

EF

1

5

EF

3

5

EF

2

1

EF1

4

EF0

1

EF0

2

EF0

4

EF1

0

EF1

1

EF1

8

EF2

4

5

3

1

2

8

Inspect the electromagnetic clutch.

(a) Connect positive pole of battery to junction

terminal and negative pole to housing of
compressor.

(b) Inspect electromagnetic clutch under switching

on condition.

Does the A/C clutch operate normally?

No

Yes

The system is normal.

Yes

The system is normal.

No

No

Yes

The system is normal.

1710