Geely Emgrand X7. Manual part — 205

(d) Inspect the positive crankcase ventilation valve, ventilation pipe connection is correct or not

and leakage.

(e) Inspect whether there is any leakage in the intake system.

Is there any above mentioned fault?

Step 4

Inspect the spark plug

(a) Dismantle the spark plug from the misfire cylinder.

(b) Inspect whether the spark plug clearance is too large or too small.

Standard Gap: 1.0-1.1 mm (0.039-0.043 in)

(c) Inspect the spark plug electrode for erosion and damage.

(d) Inspect whether the spark plug and the electrode part skirt is wet or not and Inspect the

existence of a serious gasoline leakage.

(e) Reinstall the spark plug.

The existence of the above faults?

Note: Prior to the implementation of this test, the following conditions must be met:

(a) Disconnect all fuel injector connectors.

(b) Run the engine for no longer than 5s.

Step 5

Inspect whether the spark plug arcing is normal.

(a) Test

the

spark.

(b) Dismantle misfire cylinder ignition wires.

(c) Disconnect all fuel injector cylinder connectors.

(d) Install the spark plug to the ignition wires.

(e) Run the engine (the engine running time no longer than 5s) and inspect the arcing.

(f) Reconnect all cylinder fuel injector connectors.

(g) Install the ignition wires.

Is spark plug arcing normal?

No

Go to step 9

Yes

Yes

Refer to 2.10.8.4 Replacement of Spark Plug to
replace the spark plug. Go to step 8

No

Yes

Repair the faulty part. Go to step 17

No

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Step 6

Inspect the misfire cylinder compression pressure.

The specific steps refer to 2.6.7.3 Cylinder Compression Test in 2.6Mechanical System.

Is cylinder compression pressure normal?

Step 7

Refer to the 2.6.7 Diagnostic Information and Procedures in the Mechanical System to
inspect the cause for the low cylinder compression force.

Step 8

Inspect fuel and misfire cylinder fuel injectors.

(a) Inspect whether there is fuel injectors leakage and stagnate.

(b) Inspect

fuel

quality.

The existence of the above faults?

Note: Prior to the implementation of this test, the following conditions must be met:

(a) Disconnect all fuel injector connectors.

(b) Run the engine for no longer than 5s.

Step 9

Use a properly working spark plug and inspect whether there is misfire cylinder
jump-spark.

(a) Replace the installed spark plug with a spark plug that works properly.

(b) Test

spark

plug.

(c) Dismantle ignition guide wire of misfire cylinder .

(d) Disconnect all fuel injector cylinder connectors.

(e) Spark plug was installed on the ignition guide wire .

(f) Run the engine (the engine running time no longer than 5 s) and inspect the arcing.

(g) Reconnect all cylinder fuel injector connectors.

(h) Install

ignition guide wire .

Is spark plug arcing normal?

Yes

Repair the faulty part. Go to step 17

No

Yes

Go to step 10

No

820

Step 10

Inspect ECM control connector terminal voltage of the misfire cylinder fuel injector.

(a) Rotated ignition switch to ON

position .

(b) Connect ECM harness EN01.

(c) Measure ECM harness connector

EN01 terminal voltage according
to the following table.

NL02-2100b

EN01 发动机控制模块线束连接器

1

2

4

5

3

81

63

44

25

6

62

43

24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

9

8

7

26

42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27

45

46

61 60 59 58

57 56 55

54 53 52 51 50 49 48 47

64

65

66

80 79 78 77 76 75 74 73 72 71 70 69 68 67

25

6

7

8

Connector terminal

Specified Value

EN01(6)

EN01(7)

EN01(8)

EN01(25)

9-14V

Is voltage the specified value?

Refer to the 2.6.8.21 Valve Clearance Adjustments in the Mechanical System, and is valve
clearance normal?

Step 11

Inspect the misfire cylinder valve clearance.

No

Inspect the fuel injector circuit. Refer to
2.2.7.29 DTC P0261, P0262.

Yes

Inspect the ignition coil and
ignition wire. Go to step 17.

No

Yes

Replace the spark plug. Refer to
2.10.8.4 Replacement of Spark
Plug. Go to step 17

EN08 knock sensor harness connector

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Step 12

Inspect valve timing system.

Refer to the 2.6.8.9 Replacement of Timing Chain Cover in the Mechanical System, and Is valve
timing normal?

Refer to Fuel System in the2.3.7.3 Fuel Pressure Testing Procedure, and is fuel pressure normal?

(a) Inspect

intake

air

pressure sensor data.

(b) Inspect engine coolant temperature sensor data.

(c) Inspect

throttle position sensor.

Are these components normal?

Step 15

Inspect the ECM Power Supply Circuits.

(a) Inspect whether ECM power supply circuit is normal.

(b) Inspect whether ECM ground circuit is normal.

Step 16

Replace ECM

Refer to 2.12.7.11 Crankshaft Position Sensor (CKP) Learn to carry out the crankshaft position
sensor learn after replacing the ECM.

Step 13

Inspect the fuel pressure

Step 14

Inspect whether the data in the data flow table is normal.

No

Repair the faulty part.

Yes

No

Replace the damaged components. Go to
step 17.

Yes

No

Check fuel system: fuel pump, fuel filter, fuel pipe
circuit and fuel pressure regulator. Go to step 17

Yes

No

Adjust the valve timing. Go to step 17.

Yes

No

Adjust the valve clearance. Go to step 17.

Yes

822