Chery Tiggo 5 (T21). Manual - part 48

06–

34

06

a. Disconnect upstream oxygen sensor connector E-084.
b. Check upstream oxygen sensor connector.

a. Turn ignition switch to ON.
b. Check voltage between terminal 4 of upstream oxygen 

sensor connector E-084 and body ground. 

2

Check upstream oxygen sensor connector

RT21090110

Repair or replace connector

NG

3

Check upstream oxygen sensor heater power supply voltage

OK

E-084

1

2

3

4

-

+

V

RT21065008

Multimeter 

Connection

Condition

Specified 

Condition

E-084 (4) - Body 

ground

Ignition switch ON

11 to 14 V

Go to step 5

OK

NG

06–

35

06

a. Turn ignition switch to LOCK.
b. Check fuse EF39 and main relay.
c. Disconnect engine compartment fuse and relay box 

connector E-076.

d. Check wire harness between upstream oxygen sensor 

connector terminals and engine compartment fuse and 
relay box connector terminals.
Check for Open

Check for Short

4

Check upstream oxygen sensor power supply circuit

E-076

A1

A2

A3

A4

A5

A6

A7

A8 A9 A10

E-084

1

2

3

4

-

+

RT21065009

Multimeter 

Connection

Condition

Specified 

Condition

E-084 (4) - E-076 

(A7)

Always

Continuity

Multimeter 

Connection

Condition

Specified 

Condition

E-084 (4) or 

E-076 (A7) - Body 

ground

Always

No continuity

E-084 (4) or 

E-076 (A7) - 

Battery positive

Always

No continuity

Replace fuse, main relay, wire harness or 
connector (upstream oxygen sensor - 
engine compartment fuse and relay box)

NG

OK

06–

36

06

a. Disconnect ECM connector E-035.
b. Check wire harness between upstream oxygen sensor 

connector terminals and ECM connector terminals.
Check for Open 

Check for Short

a. Measure resistance of upstream oxygen sensor.

5

Check upstream oxygen sensor heater control circuit

E-084

E-035

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

1

2

3

4

-

+

RT21065010

Multimeter 

Connection

Condition

Specified 

Condition

E-084 (3) - E-035 

(9)

Always

Continuity

Multimeter 

Connection

Condition

Specified 

Condition

E-084 (3) or 

E-035 (9) - Body 

ground

Always

No continuity

E-084 (3) or 

E-035 (9) - 

Battery positive

Always

No continuity

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

NG

6

Check upstream oxygen sensor heater

OK

RT21090140

-

+

A

B

C

D

Multimeter 

Connection

Condition

Specified 

Condition

Terminal C - 

Terminal D

20°C

7 - 11 Ω

Terminal A - 

Terminal B

Always

No continuity 

Terminal A - 

Terminal C

Terminal A - 

Terminal D

Terminal B - 

Terminal C

Terminal B - 

Terminal D

Replace upstream oxygen sensor

NG

06–

37

06

a. Use X-431 3G diagnostic tester to read the ECM DTC.
b. Refer to "DTC Confirmation Procedure".
c. Check if DTC P0030-00, P0031-00, P0032-00 or P0053-00 still exists.

7

Check for DTCs

Replace ECM

OK

NG

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

OK