Geely Emgrand X7. Manual part — 137

(b) Measure harness connector EM01 terminal No. 17 voltage with a multimeter.

Disconnect ECM harness connector EM01.

(e)Standard Voltage: 11-14 V

Confirm if the voltage conforms to standard value.

4

Inspect ECM working circuit.

(a) Check if ECM power circuit is normal.

(b) Inspect if ECM ground is normal.

5 Troubleshooting

No

Repair the faulty part.

Yes

No

Replace Fan high- or low- speed relay 2 and verify
its high speed running.

Yes

547

2.8.7.5 Cooling fan does not run at low speed

Note: Before carry out this diagnostic procedures, please refer to the2.8.7.2 Cooling Fan Circuit
Diagnosis, which will facilitate the Diagnostic.

1

Inspect cooling fan 1 low speed working power supply.

(a) Rotated ignition switch to "OFF"

position .

(b) Disconnect cooling fan harness

connector CA09.

(c) Rotated ignition switch to "ON"

position .

(d) Connect fault diagnosis tester to

the diagnostic interface.

(e) Select in sequence: Engine /

Action Test /Fan Low-Speed.

(f) Make

low-speed relay work.

NL02-2253b

1

2

CA09 冷却风扇电机1线束连接器

1

(g) Measure the voltage between cooling fan harness connector CA09 terminal No. 1 and a

reliable ground.

Standard Voltage: 11-14 V

Confirm whether the voltage conforms to standard value.

2

Inspect the cooling fan ground circuit.

(a) Rotated ignition switch to "OFF" position .

(b) Disconnect cooling fan harness connector CA10.

(c) Measure cooling fan wire harness connector CA10 terminal 2 plug hole and reliable

grounding.

Resistance value between

Standard Resistance: Less than 1 Ω

Confirm whether the resistance conforms to standard value.

3

Inspect the performance of cooling fan 1 .

No

CA16 terminal No . 3 has poor connection
to ground , Inspect and repair faulty part .

Yes

No

Go to step 6

Yes

CA09cooling fan motor 1harness

connector

548

(a) Rotated ignition switch to "OFF" position .

(b) Connect fault diagnosis tester to diagnosis testing interface.

(c) Rotated ignition switch to "ON" position .

(d) Select in sequence: Engine / Action Test /Fan Low-Speed.

(e) Make low-speed relay 1 work.

(f) Measure the voltage between the cooling fan 1 harness connector CA09 terminal 2 and the

reliable grounding (Note: don’t disconnect the connection between the harness connector
CA09 and Fan 1).

Standard Voltage: 11-14 V

Confirm whether the voltage conforms to standard value.

4

Inspect the power supply for cooling fan 2 .

(a) Rotated ignition switch to "OFF" position .

(b) Disconnect cooling fan harness connector CA10.

(c) Connect fault diagnosis tester to diagnosis testing interface.

(d) Turn ignition switch "ON" position.

(e) Select in sequence: Engine / Action Test /Fan Low-Speed.

(f) Make low-speed relay 1 work.

(g) Measure voltage between CA10 cooling fan harness connector terminal No.1 and a reliable

ground.

Standard Voltage: 11-14 V

Confirm whether the voltage conforms to standard value.

5

Replace the fan 2.

6

Use the “Action Test” of fault diagnosis tester to drive the fan low-speed.

(a) Does the low-speed relay 1 work?

No

Inspect the circuit between Fan 2 and Fan 1 as well
as the low-speed relay 2 and repair the faults found.

Yes

No

Replace the fan 1.

Yes

549

7

Inspect the high-speed and low-speed relay 1 socket No.30 input power supply.

(a) Rotated ignition switch to "OFF"

position .

(b) Dismantle the cooling fan high-

or low-speed relay 1.

(c) Measure voltage between high-

or low-speed cooling fan relay 1
socket No.30 and a reliable
ground.

Standard Voltage: 11-14 V

Confirm whether the voltage
conforms to standard value.

NL11-2257b

ER03

8 5

86

8 7

30

3 0

87

8 6

8 5

ER05

3 0

8 7

86

85

ER06

30

87

87 a

8 6

8 5

ER11

ER08

ER

09

8 5

8 6

87

3 0

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

EF0

8

EF0

7

EF2

7

EF2

6

EF2

2

EF2

9

EF

0

3

EF

0

6

EF

0

9

EF2

5

EF1

7

EF1

6

EF1

5

EF

3

5

EF2

1

EF1

4

EF

01

EF

02

EF

04

EF

10

EF

1

1

EF1

8

EF2

4

3 0

8

Inspect high-speed or low-speed cooling fan relay 1 and cooling fan harness connector
CA09 wiring harnesses.

(a) Rotated ignition switch to "OFF" position .

(b) Dismantle the cooling fan high- or low-speed relay 1.

(c) Disconnect cooling fan wiring harness connector CA09.

(d) Test continuity between high-speed or low-speed cooling fan relay 1 terminal No.87 and

cooling fan wiring harness connector CA09 terminal No.1.

(e) Measure resistance between high-speed cooling fan relay 1 terminal No.87 and a reliable

ground. Inspect whether the circuit is short to ground.

Standard Value

Test Items

Specified Value

Cooling Fan High-Speed Relay 1(87)-CA09(1)

Less than 1 Ω

Resistance Between Cooling Fan High-Speed
Relay 1(87) and Reliable Grounding

10 kΩ or higher

Confirm whether the measured value conforms to the standard value.

No

Inspect and repair the faulty locations and replace
the underhood fuse relay box if necessary.

Yes

No

Go to step 10

Yes

550