Geely Emgrand X7. Manual part — 388

6.4.4 Diagnostic information and procedures

6.4.4.1 Troubleshooting precaution

1. Attention should be paid when replacing each part, because it will affect performance of brake system and

cause dangerous driving. Geely manufactured standard should be used.

2. When repairing brake system, it is very important to keep the parking and site clean.

3. If any leakage of brake fluid is found, it is necessary to disassemble it. If any abnormal situation is found,

replace it with new components.

4. When dismantling the braking components, properly wrapping the brake pipeline to prevent such foreign

matters as dust, soil, etc from entering the pipeline.

5. Do not damage or deform the brake line when dismantling or installing it.

6. Make the brake line or hose is not torsioned or bent when installing.

7. The flexible brake hose must be kept away from the shock absorber oil and grease.

8. Make sure the rigid brake pipe and flexible brake hose do not interfere with other components after they are

installed.

9. Do not have the brake fluid adhere to such painted surface as the body surface. If the brake fluid is leaked to

the painted surface, immediately remove the brake fluid.

6.4.4.2 Fault Symptom Table

Symptoms

Suspected Parts

Measures / Refer to

Brake fluid level

See 6.4.4.3 brake warning lamp keeps
normally on.

Brake fluid level sensor

See 6.4.4.3 brake warning lamp keeps
normally on.

Brake warning lamp is
always on

Brake fluid level sensor harness

See 6.4.4.3 brake warning lamp keeps
normally on.

1. brake lining(broken, twist, dust,
smooth)

See 6.2.4.1 inspection of brake pad in front
and rear brake diagnostic information and
procedures.

2. brake caliper bracket fixing bolt
(loose)

Check brake caliper support fixing bolt

3. brake caliper fixing bolt (loosed )

Check brake caliper fixing bolt

4. brake disc (flaw) (front)

See 6.2.4.5 brake disc surface and wear
inspection.

5. brake disc guide plate (loosening)

See 6.2.4.3 inspection of brake pad guide
plate in front and rear brake diagnostic
information and procedures.

The brake system has
noise.

6. brake caliper floating pin (wear)

See 6.2.4.4 inspection of brake caliper
floating pin in front and rear brake
diagnostic information and procedures.

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1. piston(fixed, stuck)

See 6.2.4.2 inspection of brake caliper in
front and rear brake diagnostic information
and procedures.

2. brake disc (with crack)

See 6.2.4.5 brake disc surface and wear
inspection in front and rear brake diagnostic
information and procedures.

3 . Brake pad( crack . twist or oil
mark)

See 6.2.4.1 inspection of brake pad in
front and reare brake diagnostic information
and procedures.

Brake offset

4 brake rigid pipe, hose (distorted,
deformation)

Check brake rigid pipe and hose

1. hydraulic brake booster system
(vacuum leakage, fail)

Inspect the hydraulic vacuum booster.

The brake pedal is too
hard.

2． brake rigid pipe, hose (distorted,
deformation)

Check brake rigid pipe and hose

1. brake system brake fluid leakage

Check brake system brake fluid leakage

2. there is air in brake system.

See 6.4.5.5 hydraulic brake system air
exhausting procedures in this section
dismantlement and installation.

3. brake disc (with crack)

See inspection of brake discs in front and
reare brake diagnostic information and
procedures.

4. bracke lining (breakage, torsion,
excessive wear or oil stain)

See 6.2.4.1 inspection of brake pad in
front and reare brake diagnostic information
and procedures.

The brake pedal is too
soft and the brake is
insufficient.

5 brake master cylinder (internal
leakage)

Check brake master pump

1. brake pedal free stroke (shortage)

See 6.4.5.8 replacement of brake pedal in
this section dismantlement and installation.

2. parking brake rod stroke (can't be
adjusted)

See 6.5.5.4 adjustment of parking brake
control mechanism assembly in parking
system dismantlement and installation.

3 .front parking brake cable (struck)

See 6.5.5.3 replacement of parking brake
control mechanism assembly control cable.

4 . left / right parking brake cable
( stuck )

See 6.5.5.3 replacement of parking brake
control mechanism assembly control cable.

brake lag

5 . brake pad(clamping stagnation)

See 6.2.4.1 inspection of brake pad in
front and reare brake diagnostic information

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and procedures.

Floating pin of brake caliper (rust)

See 6.2.4.4 inspection of brake caliper
floating pin.

6. piston (fixed, jammed)

See 6.2.4.2 inspection of brake caliper in
front and rear brake diagnostic information
and procedures.

7. The vacuum booster is jammed.

Inspect the vacuum booster.

8. brake master pump (fault)

Check brake master pump

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6.4.4.3 Brake warning lamp is always ON

Circuit diagram:

NL06-1004b

1

IP01

2

IP01

9

IP02

1

CA20

2

CA20

B+

IG

IG1

IP+B

BRAKE FLUID

15A IF06

10A IF25

制动液液位
传感器

IPC

IP01

3

6

IP01

SENS GND

GND

Diagnostic Steps:

1

Check brake fluid level .

A．Check if brake fluid level is normal

2

Check the harness (combination instrument asembly power supply, ground).

(a) Make ignition switch turn to OFF.

(b) Disconnect negative cable from battery.

(c) Disconnect IP01 connector from combination

instrument

(d) Battery negative cable connects to battery.

(e) Ignition switch was turned to ON (IG).

(f) Use multimeter to measure voltage between

connector IP01 terminal 1 and 2 respectively with
vehicle body groudning.

Standard voltage：11-14V

NL06-1014b

IP01 组合仪表线束连接器1

16

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

17

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18

3

6

2

1

Fill brake fluid to MAX.

Yes

No

Brake fluid

level fluid

IP01 combination instrument harness

connector1

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