Chery Tiggo 5 (T21). Manual - part 270

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Brake Control System (Page 3 of 3)

ET21250030

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8

2

1

2

1

1

2

1

2

FRONT LEFT 
WHEEL SPEED 
SENSOR

FRONT RIGHT 
WHEEL SPEED 
SENSOR

REAR LEFT 
WHEEL SPEED 
SENSOR

REAR RIGHT 
WHEEL SPEED 
SENSOR

R

Br

GY

WY

GR

GW

VB

V

GR

GW

VB

V

9

20

2

1

1

2

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ABS
CONTROL
MODULE

13

12 11 10 9 8 7 6 5 4 3 2

24 23 22 21 20 19 18 17 16 15 14

37 36 35 34 33 32 31 30 29 28 27 26

1

38

25

B

E-085

E-085

W

E-029

B-054

E-029

B

B-009

B

B-029

B-009

B-029

B

E-036

B

E-060

1

2

1

2

E-036

E-060

LW

L

J107

2

3

E-027

I-034

PSE 
CONNECTION

I-029

J101

J102

J103

J104

J105

J106

J107

J108

J109

J110

J111

J112

J113

J114

J115

J116

Gr

I-029

1

2

9

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W

I-034

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DIAGNOSIS & TESTING

Problem Symptoms Table

HINT:
Use the table below to help determine the cause of problem symptoms. Check each suspected area in 
sequence. Repair or replace the faulty components, or adjust as necessary.

Diagnosis Procedure

HINT:
Use the following procedures to troubleshoot the Anti-lock Brake System (ABS). 

Standard voltage: 11 to 14 V
If voltage is below 11 V, recharge or replace the battery before proceeding to next step.

Symptom

Suspected Area

See page

When turning ignition switch ON, ABS 
warning light does not come on

ABS fuse

51-34

Wire harness or connector

-

ABS control module assembly

25-71

Instrument cluster

38-42

ABS warning light remains on

ABS fuse

51-34

Wire harness or connector

-

ABS control module assembly

25-71

Instrument cluster

38-42

ABS operation is abnormal

Wheel speed sensor (damaged, improper 
installed, foreign matter attached)

25-74

, 

25-76

Hub ring gear (damaged, improper 
installed, foreign matter attached)

-

Brake line (blocked or leaked)

-

Wire harness or connector

-

ABS control module assembly

25-71

Communication with diagnostic tester 
cannot be performed

ABS fuse

51-34

Wire harness or connector

-

X-431 3G diagnostic tester

-

ABS control module assembly

25-71

1

Vehicle brought to workshop

2

Check battery voltage

NEXT

NEXT

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3

Customer problem analysis

4

Check and clear DTCs

5

Confirm and duplicate malfunction: accelerate vehicle to 15 km/h or more, simulate 
malfunction conditions and read DTCs again

NEXT

NEXT

For current DTC, go to step 7

For history DTC, go to step 8

DTC 
occurs

No 



DTC

6

Problem repair (no DTC), then go to step 9

7

Troubleshoot according to Diagnostic Trouble Code (DTC) chart, then go to step 9

8

Troubleshoot according to Problem Symptoms Table, then go to step 9

9

Conduct test and confirm malfunction has repaired

10

End

NEXT

NEXT

NEXT

NEXT

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Problem Repair (No DTC)

If there is a problem in brake system, but no DTC is stored in ABS control module assembly, this problem is 
called a problem without DTC. A problem without DTC is caused by basic brake system malfunction. For 
example:
1. Brake fluid leakage (it may result in weak braking, brake pedal overtravel, or even ineffective braking).
2. Using inferior brake fluid (it can result in corrosion of brake line and ABS hydraulic regulating module 

internal elements, or even ineffective braking).

3. Air in brake line (it may result in weak braking, or even ineffective braking).
4. Brake line blockage (it may result in hard braking, or even ineffective braking).
5. Excessive wear of brake disc (it may result in weak braking, brake pedal overtravel).
6. Brake booster malfunction (it may result in weak or hard braking, brake pedal overtravel, or even 

ineffective braking).

7. Wrong brake line connection (it may result in braking performance decreasing, drift, long braking distance 

etc.).

HINT:

 ABS interrupted due to no power supply or power supply abnormality will cause the ABS warning light 

remains on without storing DTC.

 Troubleshooting method: check corresponding component according to the malfunction, repair or replace 

as necessary.

DTC Confirmation Procedure

Confirm that battery voltage is normal before performing the following procedures.
 Turn ignition switch to LOCK.
 Connect X-431 3G diagnostic tester (the latest software) to Data Link Connector (DLC).
 Turn ignition switch ON.
 Using X-431 3G diagnostic tester to record and clear the DTCs stored in the ABS control module 

assembly.

 Turn ignition switch to LOCK and wait for a few seconds.
 Start engine, drive the vehicle at 20 km/h or more and perform road test with X-431 3G diagnostic tester 

connected to Data Link Connector (DLC).

 Using X-431 3G diagnostic tester to select "Read Code".
 If DTC is detected, the malfunction indicated by the DTC is current. Go to the diagnosis procedure - Step 1.
 If DTC is not detected, the malfunction indicated by the DTC is intermittent. Please refer to Intermittent 

DTC Troubleshooting.