Chery Tiggo 5 (T21). Manual - part 421

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37

Self-diagnosis Detection Logic

Diagnosis Procedure

a. Turn ignition switch to LOCK.
b. Disconnect the negative battery cable.
c. Pull out the fuse MF03 (60A).
d. Check if the fuse is blown.

a. Remove the anti-theft horn from the malfunctioning vehicle and install it to a new vehicle and perform a 

test.

DTC Code

DTC Definition

DTC Detection 

Condition

Warning Light 

Condition

Possible Cause

B101D11

Siren Output Control 
Circuit Circuit Short to 
Ground

Ignition switch ON

ON

 Fuse
 Anti-theft horn
 Wire harness or 

connector

 Body Control 

Module (BCM)

B101D13

Siren Output Control 
Circuit Circuit Open

B101D12

Siren Output Control 
Circuit Circuit Short to 
Battery

CAUTION

 When performing the circuit diagnosis and test, always refer to the circuit diagram for the specific circuit 

and the component information.

1

Check fuse MF03 (60A)

Replace fuse MF03 (60A)

NG

2

Check anti-theft horn

OK

Replace anti-theft horn

NG

OK

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a. Turn ignition switch to LOCK.
b. Disconnect the negative battery cable.
c. Disconnect the body wire harness connector B-043 and 

B-048.

d. Using a digital multimeter, check for continuity between 

body wire harness connectors B-043 and B-048 
according to the table below.

a. Turn ignition switch to LOCK.
b. Disconnect the negative battery cable.
c. Disconnect the engine compartment wire harness 

connectors E-061 and E-072.

d. Using a digital multimeter, check for continuity between 

engine compartment wire harness connectors E-061 and 
E-072 according to the table below.

3

Check body wire harness and connector

RT21370710

-

+

1

2

3

4

5

11

12

13

14

15

6

7

8

9

10

22 21 20 19 18 17

16

C1

C10 C11 C12 C13 C14 C15 C16 C17 C18

C2 C3 C4 C5

C6 C7 C8 C9

C20

C19

B-043

B-048

Multimeter 

Connection

Condition

Specified 

Condition

B-043 (C4) - 

B-048 (6)

Always

Continuity

Repair or replace body wire harness and 
connector

NG

4

Check wire harness and connector

OK

RT21370700

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+

E-072

E1

3

E-061

Multimeter 

Connection

Condition

Specified 

Condition

E-061 (3) - E-072 

(E1)

Always

Continuity

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e. Disconnect the engine compartment wire harness 

connectors E-070 and E-053.

f. Using a digital multimeter, check for continuity between 

engine compartment wire harness connectors E-070 and 
E-053 according to the table below.

g. Disconnect the engine compartment wire harness 

connector E-053 and ground E-032.

h. Using a digital multimeter, check for continuity between 

engine compartment wire harness connector E-053 and 
ground E-032 according to the value(s) in the table 
below.

a. Connect all connectors.
b. Connect the negative battery cable.
c. Turn ignition switch to ON.
d. Use the X-431 3G diagnostic tester (the latest software) to record and clear the DTCs stored in the Body 

Control Module (BCM).

e. Turn the ignition switch to LOCK and wait for a few seconds.
f. Turn ignition switch to ON.
g. Use the X-431 3G diagnostic tester (the latest software) to read DTCs stored in the Body Control Module 

(BCM) again.

RT21370720

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+

E-070

E-053

2

1

1

2

3

4

5

6

7

8

9 10

11 12 13 14 15

18

17

16

19 20 21 22

Multimeter 

Connection

Condition

Specified 

Condition

E-070 (6) - E-053 

(2)

Always

Continuity

RT21370730

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+

E-053

E-032

2

1

Multimeter 

Connection

Condition

Specified 

Condition

E-053 (1) - E-032

Always

Continuity

Repair or replace engine compartment 
wire harness and connector

NG

5

Reconfirm DTCs

OK

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Result

Proceed to

DTC B101D11, B101D13 and B101D12 are output 

NG

No DTC is output

OK

Replace Body Control Module (BCM)

NG

System is normal

OK