Geely Emgrand X7. Manual part — 631

11.11.6 Diagnostic information and steps

11.11.6.1 Diagnosis descriptions

Refer to 11.11.2 Description and Operation to get familiar with the system functions and operation
before starting system diagnosis, so that it will help to determine the correct diagnostic steps, more
importantly, it will also help to determine whether the situation described by the customer is
normal.

11.11.6.2 Visual inspection

–

Inspect the after-sales optional device which may affect the normal operation of defroster.

–

Inspect components easy to access system to identify whether there is a significant damage
that may lead to the fault.

–

If both the rear window defroster and rearview mirror don't work, it is necessary to inspect
and repair power supply or bad grounding connection or short-circuit faults before
diagnosing fault.

2523

11.11.6.3 Rear windscreen defrost can not work

Circuit diagram:

Circuit diagram，refer to 11.11.5.1 electrical schematic diagram

Diagnostic steps:

1

Check fuseIF25, IF16.

(a) Check fuse IF25, IF16was blown

Fuse rated current: 10A and 30A

Confirm whether the fuses are blown.

NL11-2181b

IR05

85

86

8 7

3 0

IR02

8 5

8 6

8 7

3 0

IR07

8 5

86

87

3 0

4

IR01

2

1

5

3

4

2

1

5

3

IR04

IR03

8 5

8 6

8 7

3 0

IF 1 4

IF
2

9

IF
3

2

IF
3

3

IF
3

4

IF
3

5

IF
1

8

IF 1 3

IF 11

IF
2

5

IF

2

5

IF
2

6

IF
2

7

IF
2

5

IF
0

1

IF
0

2

IF
0

3

IF
0

4

IF
0

5

IF
0

6

IF
2

6

IF
2

7

IF
2

3

IF

3

0

IF

1

2

IF

1

6

IF

1

7

2

Check fuseIF25. IF16 circuit.

(a) Inspect for short circuit.

(b) Repair the circuits. Confirm that there are no short circuits.

(c) Replace the fuses with rated current.

Confirm whether the function is normal.

3

Inspect the defrosting switch.

Yes

The system is normal.

No

No

Go to step 3

Yes

2524

(a) Disconnect defroster switch wire

harness connector.

(b) Energy guide of defrost switch

after test

NL11-2182b

2

6

5

4

3

1

IP06 后除霜开关线束连接器

1

4

Test terminal

Test conditions Conduction

condition

IP06(1)—IP06(4) Release

10

kΩ or higher

IP06(1)—IP06(4)

Press down

Less than 1 Ω

Confirm whether the resistance conforms to standard value.

4

Replace the defrosting switch.

(a) Replace defrost switch. Refer to11.10.7.3 rear windscreen glass defrost switch replacement.

Confirm whether the rear window defrosting function is normal.

5

Does the rear defrosting relay work after the defrosting switch is pressed?

(a) Press defroster switch. Does the rear defroster relay still work?

6

Inspect the relay coil circuit.

Yes

Go to step 7

No

Yes

The system is normal.

No

Yes

Go to step 7

No

IP06rear defrost switchharness

connector

2525

(a) Turn on ignition switch to ON
position.

(b) Press down rear defrost switch.

(c) Use multimeter to measure

effective grounding voltage
between air conditioner panel
wire harness connector IP27
terminal No. 11, 12 and vehicle
body.

Standard voltage: 11-14V

Confirm if the voltage conforms to
standard value.

NL11-2183b

IP27 空调控制面板线束连接器

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15 16

11

12

7

Replace defrost relay of rear windscreen.

8

Replace A/C control panel.

(a) Replace A/C control panel, refer to A/C control panel replacement.

9

Inspect the voltage of the terminal No. 1 of the rear defroster wire harness connector
SO47 and the effective body grounding.

(a) Turn on ignition switch to ON

position.

(b) Press down defrost switch.

(c) Use multimeter to measure

effective grounding voltage of
rear defroster wire harness
connector SO47 terminal No. 1
and vehicle body.

Standard voltage: 11-14V

Confirm if the voltage conforms to
standard value.

NL11-2184b

1

IP47 后除霜正极线束连接器1

1

Yes

Go to step 11

No

Yes

Go to step 8

No

IP27 air condition control panel

harness connector

IP47rear defrost positive harness

connector1

2526