Chery Tiggo 5 (T21). Manual — part 96
06–
226
06
a. Measure compression of misfiring cylinder (
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 (
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
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