Chery Tiggo 5 (T21). Manual - part 82

06–

170

06

DTC Confirmation Procedure

Confirm that battery voltage is over 12 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).
 Turn ignition switch to ON.
 Use X-431 3G diagnostic tester to record and clear the DTCs stored in the ECM.
 Select Read Code.
 If the 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 (

See page 06-18

).

Diagnosis Procedure

a. Turn ignition switch to LOCK.
b. Check ECM grounds E-026 and E-028 (

See page 06-18

).

a. Disconnect ECM connector E-033.
b. Disconnect TCU connector E-030.
c. Check if connectors are normal.

DTC Code

DTC Definition

DTC Detection 

Condition

Possible Cause

U0101-87

Lost Communication 
With TCM (CVT only)

Ignition switch ON
Engine running

 CAN line or connector
 ECM
 TCM

CAUTION

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

component information.

1

Check ECM ground point

Repair or replace ground wire harness or 
ground point

NG

2

Check ECM connector and TCM connector

OK

Repair or replace connector

NG

OK

06–

171

06

a. Check CAN line.

Check for Open

Check for Short

a. Use X-431 3G diagnostic tester to read the ECM DTC.
b. Refer to "DTC Confirmation Procedure".
c. Check if DTC U0101-87 still exists.

3

Check CAN line

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

E-030

29 30 31 32 33 34 35 36 37 38 39 40 41 42

1 2 3 4 5 6 7 8 9 10 11 12 13 14

43 44 45 46 47 48 49 50 51 52 53 54 55 56

15 16 17 18 19 20 21 22 23 24 25 26 27 28

-

+

RT21065063

Multimeter Connection

Specified 

Condition

E-033 (1) - E-030 (41)

Continuity

E-033 (17) - E-030 (42)

Continuity

Multimeter Connection

Specified 

Condition

E-033 (1) or E-030 (41) - Body ground

No continuity

E-033 (1) or E-030 (41) - Battery 

positive

No continuity

E-033 (17) or E-030 (42) - Body 

ground

No continuity

E-033 (17) or E-030 (42)- Battery 

positive

No continuity

Repair or replace CAN line

NG

4

Replace ECM, and check for DTCs

OK

Replace TCU

NG

System is operating normally. 
Reassemble vehicle and perform a road test to confirm that malfunction reported by customer has 
been repaired.

OK

06–

172

06

DTC

U0129-87 Lost Communication With BSM

ET21065020

2-1

2-17

26

CAN H1

CAN L1

CAN H1

CAN L1

14

OB

O

OB

O

ECM-2

ECM-1

E-033

E-035

2-63

2-64

1-47

Br

Br

B

B

Br

B

1-48

E-026

E-028

37 38 39 40 41 42 43 44 45 46

47

48

25 26 27 28 29 30 31 32 33 34

35

36

13 14 15 16 17 18 19 20 21 22

23

24

1

2

3

4

5

6

7

8

9 10

11

12

B

E-033

B

E-035

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

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

06–

173

06

DTC Confirmation Procedure

Confirm that battery voltage is over 12 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).
 Turn ignition switch to ON.
 Use X-431 3G diagnostic tester to record and clear the DTCs stored in the ECM.
 Start the engine and warm it up to normal operating temperature, and then select Read Code.
 If the 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 (

See page 06-18

).

Diagnosis Procedure

a. Turn ignition switch to LOCK.
b. Check ECM grounds E-026 and E-028 (

See page 06-18

).

a. Disconnect ECM connector E-033.
b. Disconnect ABS connector E-085.
c. Check if connectors are normal.

DTC Code

DTC Definition

DTC Detection 

Condition

Possible Cause

U0129-87

Lost Communication 
With BSM

Ignition switch ON
Engine running

 CAN line or connector
 ECM
 ABS

CAUTION

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

component information.

1

Check ECM ground point

Repair or replace ground wire harness or 
ground point

NG

2

Check ECM connector and ABS connector

OK

Repair or replace connector

NG

OK