Chery Tiggo 5 (T21). Service manual - part 362

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39

32

SUPPLEMENTAL RESTRAINT SYSTEM

DTC

B0072-11

Belt Pretensioner Front Passenger Loop Circuit Short to 
Ground

DTC

B0072-12

Belt Pretensioner Front Passenger Loop Circuit Short to 
Battery 

DTC

B0072-1A

Belt Pretensioner Front Passenger Loop Circuit 
Resistance Below Threshold 

DTC

B0072-1B

Belt Pretensioner Front Passenger Loop Circuit 
Resistance Above Threshold

DTC

B0072-1C

Belt Pretensioner Front Passenger Loop Circuit Voltage 
Out of Range 

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ET21320070

16 15 14 13 12 11 10

8

7

6

5

4

3

2

1

9

W

I-036

32

31

30

29

28

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

27

26

25

24

23

22

21

20

19

18

17

Gr

I-046

SRS 
CONTROL 
MODULE

I-046

IGNITION SWITCH

ON OR START

10A

RF08

INSTRUMENT 
PANEL FUSE 
AND RELAY BOX

I-007

B

I-045

16

1

2

3

4

5

6

7

8

9 10 11 12

13

85

85

87

87 30

87 30

30

86

86

85

86

14 15 16 17 18 19 20 21 22 23 24

25

27

26

B

I-007

VW

VW

V

V

-

+

1

2

8

7

1

2

1

2

-

+

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

FRONT 
PASSENGER 
SEAT BELT 
PRE-TENSIONER

B-002

B

B-002

W

I-006

I-006

B-003

8

R

R

1

4

I-036

B-055

*2

*1

B-072

*2: SRS control module connector is B-072

*1: SRS control module connector is I-046

B

B-072

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Self-diagnosis Detection Logic

HINT:
When performing electrical diagnosis and test, always refer to the relevant circuit diagram for the special 
circuit and component information.

Diagnosis Procedure

a. Turn ignition switch to LOCK, disconnect the negative battery cable and wait for at least 90 seconds. 
b. Disconnect front passenger seat belt pretensioner connector, and connect the new front passenger seat 

belt pretensioner connector to connector B-002.

c. Reconnect the negative battery cable and wait for a few seconds.
d. Turn ignition switch ON and wait for at least 90 seconds.
e. Use X-431 3G diagnostic tester to clear the DTCs.
f. Turn ignition switch to LOCK.
g. Turn ignition switch ON and wait for at least 90 seconds.
h. Use X-431 3G diagnostic tester to check if the DTCs are still output.

DTC Code

DTC Definition

DTC Detection 

Condition

Warning Light 

Condition

Possible Cause

B0072-11

Belt Pretensioner Front 
Passenger Loop 
Circuit Short to Ground

Ignition switch ON

ON

 Front passenger 

seat belt 
pretensioner 

 Wire harness and 

connector 

 SRS control 

module assembly

B0072-12

Belt Pretensioner Front 
Passenger Loop 
Circuit Short to Battery 

B0072-1A 

Belt Pretensioner Front 
Passenger Loop 
Circuit Resistance 
Below Threshold 

B0072-1B

Belt Pretensioner Front 
Passenger Loop 
Circuit Resistance 
Above Threshold

B0072-1C

Belt Pretensioner Front 
Passenger Loop 
Circuit Voltage Out of 
Range 

1

Check front passenger seat belt pretensioner

WARNING

 Never measure the front passenger seat belt pretensioner directly, otherwise, it may cause serious 

personal injury due to accidental deployment of the airbag.

Replace front passenger seat belt 
pretensioner

NG

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Use circuit diagram as a guide to perform the following procedures:
a. Turn ignition switch to LOCK, disconnect the negative battery cable and wait for at least 90 seconds. 
b. Disconnect the front passenger seat belt pretensioner connector B-002 and SRS control module assembly 

connector I-046/B-072.

c. Disconnect the body wire harness connector B-003 and instrument panel wire harness connector I-006 

(*1).

d. Check if wire harnesses are worn, pierced, pinched or partially broken.
e. Check for broken, bent, protruded or corroded terminals.
f. Check if related connector terminal contact pins are in good condition.

a. Turn ignition switch to LOCK, disconnect the negative 

battery cable and wait for at least 90 seconds. 

b. Disconnect the SRS control module assembly connector 

I-046/B-072.

c. Disconnect the front passenger seat belt pretensioner 

connector B-002. 

d. Connect the negative battery cable and wait for a few 

seconds.

e. Turn ignition switch ON.
f. Using a digital multimeter, measure the voltage between 

front passenger seat belt pretensioner connector B-002 
and body ground to check for a short circuit to power 
supply according to the table below.
Standard Voltage

2

Check wire harness and connector

OK

Repair or replace instrument panel/body 
wire harness and connector

NG

3

Check front passenger seat belt pretensioner control circuit

OK

RT21320280

-

+

V

1

2

-

+

B-002

Multimeter 

Connection

Condition

Specified 

Condition

B-002 (1) - Body 

ground

Ignition switch ON

Below 1 V

B-002 (2) - Body 

ground

Ignition switch ON

Below 1 V