Chery Tiggo 5 (T21). Manual - part 379

34–

16

34

DTC Confirmation Procedure

Confirm that battery voltage is between 11 and 14 V before performing the following procedures.
 Turn ignition switch to LOCK.
 Connect X-431 3G diagnostic tester (the latest software) to Data Link Connector (DLC), and make it 

communicate with vehicle electronic module by the data network.

 Turn ignition switch to ON.
 Using X-431 3G diagnostic tester to record and clear the DTCs stored in the TCU.
 Turn ignition switch to LOCK and wait for a few seconds.
 Turn ignition switch to ON, and then 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.

Diagnosis Procedure

a. Turn ignition switch to LOCK.
b. Loosen and retighten the ground bolt or nut.
c. Check the installation position of the ground connection.

a. Turn ignition switch to LOCK.

DTC

B1303

The antenna communication is disturbed

DTC Code

DTC Definition

DTC Detection 

Conditions

Possible Causes

B1303

The antenna 
communication is 
disturbed

Ignition switch ON

 Wire harness or connector
 Immobilizer control module
 ECM

CAUTION

 If the ECM or immobilizer control module is replaced, match the system with the X-431 3G diagnostic 

tester (

See page 34-7

).

1

Check ground connection

Repair or replace ground connection

NG

2

Check engine control module (ECM) connector

OK

34–

17

34

b. Disconnect the ECM connector E-033.

c. Check if connector is damaged.

a. Turn ignition switch to LOCK.
b. Disconnect the immobilizer control module connector 



I-018 and immobilizer coil connector.

c. Check if connectors are damaged.

a. Turn the ignition switch to LOCK.

RT21380241

Repair or replace connector if necessary

NG

3

Check immobilizer control module connector and immobilizer coil connector

OK

RT21340100

Repair or replace connectors if necessary

NG

4

Check immobilizer control module and ECM communication circuit

OK

34–

18

34

b. Disconnect the immobilizer control module connector I-

018 and ECM connector E-033.

c. Check the wire harness between terminals of immobilizer 

control module and ECM.
Check for open

RT21340110

7

5

3

1

8

6

4

2

I-018

E-033

49 50 51

63

64

15

16

31

32

47

48

33 34 35

17 18 19

1

2

3

52 53 54 55 56 57 58 59 60 61 62

36 37 38 39 40 41 42 43 44 45 46

20 21 22 23 24 25 26 27 28 29 30

4

5

6

7

8

9 10 11 12 13 14

-

+

Multimeter 

Connection

Condition

Specified 

Condition

I-018 (6) - E-033 

(17)

Always

Continuity

I-018 (8) - E-033 

(1)

Always

Continuity

Repair or replace harness if necessary

NG

System is operating normally

OK

34–

19

34

DTC Confirmation Procedure

Confirm that battery voltage is between 11 and 14 V before performing the following procedures.
 Turn ignition switch to LOCK.
 Connect X-431 3G diagnostic tester (the latest software) to Data Link Connector (DLC), and make it 

communicate with vehicle electronic module by the data network.

 Turn ignition switch to ON.
 Using X-431 3G diagnostic tester to record and clear the DTCs stored in the TCU.
 Turn ignition switch to LOCK and wait for a few seconds.
 Turn ignition switch to ON, and then 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.

Diagnosis Procedure

a. Try to restart the engine with another ignition key.
b. Check if the engine can be started.

a. Replace the first ignition key or transponder in it, and match it (

See page 34-7

).

DTC

B1304

None transponder was detected

DTC Code

DTC Definition

DTC Detection 

Conditions

Possible Causes

B1304

None transponder was 
detected

Ignition switch ON

 Transponder
 Wire harness or connector
 Immobilizer coil
 Immobilizer control module

CAUTION

 If the ECM or immobilizer control module is replaced, match the system with the X-431 3G diagnostic 

tester (

See page 34-7

).

1

Start the engine with another ignition key

Go to next step 3

NG

2

Replace first ignition key or transponder

OK

OK