Chery Tiggo 5 (T21). Manual - part 96

06–

226

06

a. Measure compression of misfiring cylinder (

See page 07-20

).

a. Disconnect ECM connector E-033.
b. Turn ignition switch to ON and check ECM connector 

terminals.

7

Check pressure of cylinder

OK

Check engine to confirm cause of low 
compression

NG

8

Check ECM power supply and ground

OK

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

-

+

V

RT21065069

Multimeter 

Connection

Condition

Specified 

Condition

E-033 (35, 20) - 

E-033 (63 or 64)

Ignition switch ON

11 to 14 V

Repair or replace related wire harness

NG

Go to Diagnostic Help

OK

06–

227

06

Diagnosis Procedure

a. Check spark plug of each cylinder, and observe if the type and gap are as specified.

a. Observe if trouble occurs just after fuel is filled.

Engine starts normally, but idles roughly after warming up

1

Check air filter for blockage, and intake pipe for air leakage

Check and repair intake system

NG

2

Check spark plug

OK

Replace spark plug

NG

3

Check throttle for carbon deposits

OK

Clean throttle

NG

4

Unplug coolant temperature sensor connector, start engine and observe if engine idles
normally during warming up

OK

Check and repair wire harness or replace 
sensor

OK

5

Check injector for leakage or blockage

NG

Clean or replace injector

NG

6

Check fuel condition

OK

Replace fuel

NG

06–

228

06

a. Measure compression of misfiring cylinder (

See page 07-20

).

a. Disconnect ECM connector E-033.
b. Turn ignition switch to ON and check ECM connector 

terminals.

7

Check pressure of cylinder

OK

Check engine to confirm cause of low 
compression

NG

8

Check ECM power supply and ground

OK

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

-

+

V

RT21065069

Multimeter 

Connection

Condition

Specified 

Condition

E-033 (35, 20) - 

E-033 (63 or 64)

Ignition switch ON

11 to 14 V

Repair or replace related wire harness

NG

Go to Diagnostic Help

OK

06–

229

06

Diagnosis Procedure

Engine starts normally, but idles roughly or stalls with part load (for example, 
A/C is ON)

1

Check throttle for carbon deposits

Clean throttle

NG

2

Observe if engine output increases when A/C is turned on. This means that observe 
changes of ignition advance angle, injection pulse width and intake air volume using 
diagnostic tester

OK

Go to step 4

OK

3

Connect ECM adapter, and disconnect pin cable of ECM corresponding terminal. Check if 
wire harness side is HIGH-level signal with A/C ON

NG

Check and repair A/C system

NG

4

Check if A/C system pressure, compressor magnetic clutch and A/C compressor pump are 
normal

OK

Check and repair A/C system

NG

5

Check injector for leakage or blockage

OK

Clean or replace injector

NG

OK