Chery Tiggo 5 (T21). Service manual - part 59

06–

78

06

Diagnosis Procedure

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

See page 06-18

).

a. Disconnect downstream oxygen sensor connector.
b. Check downstream oxygen sensor connector.

a. Connect downstream oxygen sensor connector E-043.
b. Turn ignition switch to ON, start the engine and idle it for 

about 3 minutes.

c. Using diagnostic tester, measure downstream oxygen 

sensor signal voltage, or using multimeter, measure 
voltage between terminals 2 and 1 of connector E-043.

1

Check ECM ground point

Repair or replace ground wire harness or 
ground point

NG

2

Check downstream oxygen sensor connector

OK

RT21060040

Repair or replace connector

NG

3

Check downstream oxygen sensor signal

OK

ISO15031_PID03a

Datastream name

Close loop,u
sing oxygen
sensor(s) as
feedback for
fuel control

Value

Unit

23.83

8

0.46

17.25

V

kg/h

%

%

relative air mass (calc.load value) acc. To SAE J1979

Air mass flow

output voltage oxygen sensor downstream catalyst

relative air charge

Datastream

RT21060140

Multimeter 

Connection

Condition

Specified 

Condition

E-043 (2) - E-043 

(1)

Engine running

Fluctuates slightly 

at about 0.45 V

Go to step 7

OK

NG

06–

79

06

a. Turn ignition switch to LOCK.
b. Disconnect ECM connector E-033.
c. Disconnect downstream oxygen sensor connector E-043.
d. Check wire harness between downstream oxygen sensor 

connector terminals and ECM connector terminals.
Check for Open

Check for Short

a. Check wire harness between downstream oxygen sensor 

connector terminals and ECM connector terminals.
Check for Open

4

Check downstream oxygen sensor signal circuit

E-033

E-043

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

1

2

3

4

-

+

RT21065029

Multimeter 

Connection

Condition

Specified 

Condition

E-043 (2) - E-033 

(21)

Always

Continuity

Multimeter 

Connection

Condition

Specified 

Condition

E-043 (2) or 

E-033 (21) - Body 

ground

Always

No continuity

E-043 (2) or 
E-033 (21) - 

Battery positive

Replace wire harness or connector 
(downstream oxygen sensor - ECM)

NG

5

Check downstream oxygen sensor ground circuit

OK

E-033

E-043

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

1

2

3

4

-

+

RT21065030

Multimeter 

Connection

Condition

Specified 

Condition

E-043 (1) - E-033 

(43)

Always

Continuity

06–

80

06

Check for Short

a. Remove downstream oxygen sensor.
b. Check downstream oxygen sensor for following problems.

 Moisture enters the internal of sensor, temperature changes greatly, and probe is broken.
 Oxygen sensor is "poisoned" (Pb, S, Br, Si, etc.).

a. Use X-431 3G diagnostic tester to read the ECM DTC.
b. Refer to "DTC Confirmation Procedure".
c. Check if DTC P0136-00, P0137-00, P0138-00, P0140-00, P2270-00 or P2271-00 still exists.

Multimeter 

Connection

Condition

Specified 

Condition

E-043 (1) or 

E-033 (43) - Body 

ground

Always

No continuity

E-043 (1) or 
E-033 (43) - 

Battery positive

Repair or replace wire harness or 
connector (downstream oxygen sensor - 
ECM)

NG

6

Check downstream oxygen sensor

OK

Replace downstream oxygen sensor 

NG

7

Check for DTCs

OK

Replace ECM

NG

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

OK

06–

81

06

DTC

P0201-00 Cylinder 1 - Injector Circuit

ET21065007

BATTERY

ECM
MAIN 
RELAY

10A

EF19

10A

EF17

10A

EF40

A2

F14

2-20

RL

A4

2-35

L

2-5

Br

A6

2-15

2-16

RR

R

86

87

85

30

ENGINE 
COMPARTMENT 
FUSE AND 
RELAY BOX

IGNITION SWITCH
    ON OR START

A1

A2

A3

A4

A5

A6

A7

A8 A9 A10

F12

F24

F11

F23

F10

F22

F9

F21

F8

F20

F7

F19

F6

F18

F5

F17

F4

F16

F3

F15

F2

F14

F1

F13

Gr

E-076

W

E-069

E-076

E-069

B

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

ECM-2

E-033

GW

RL

C3

15A

EF08

INJECTOR 1

1-4

2

1

GW

15

E-007
E-038

E-010

1

2

C1

C2

C3 C4

C5

C6

C7

C8 C9 C10

L

E-023

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

31

35

39

40

41

42

32

33

36

37

38 34

27

28

29

30

B

E-007

B

E-010

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-035

ECM-1

E-035

E-023