Geely Emgrand X7. Manual part — 213

3. Circuit

sketch

NL02-2112b

44

EN01

ECM

BAT

15

A

E

F2

1

MPR

86

87

30

85

发动机主继电器

64

EN01

A

EN24

B

EN24

CCP

碳罐电磁阀

4. Diagnostic

Steps:

Note: Before carrying out this diagnosis step, observe the data list on fault diagnosis tester and
analyze the accuracy of the data, as these will help with quick diagnosis.

Step 1

Use fault diagnosis tester for canister solenoid valve active testing.

(a) Connect fault diagnosis tester to the Data Link Connector.

(b) Disconnect the canister solenoid valve to the Canister vacuum tubes.

(c) Start engine and turn on the fault diagnosis tester.

(d) Enter the following menu: Engine/Action Test/Canister Solenoid Valve

(e) Use fault diagnosis tester to enable the use of Canister Control Valve. Place a finger over the

vacuum port solenoid valve and inspect whether there is suction.

Step 2

Measure canister solenoid valve resistance.

(a) Rotated ignition switch to OFF position .

(b) Disconnect

canister solenoid valve harness connector EN24.

(c) Measure resistance between the canister solenoid valve two terminals.

Standard resistant value :20 (68?F)11

℃

-22Ω

((d)Connect canister solenoid valve harness connector EN24.

Yes

Refer to 2.2.7.3 Intermittent Fault
Inspection for intermittent fault.

No

Engine main relay

Canister

electromagnetic valve

851

Is the value specified value?

Step 3

Measure solenoid valve working power supply.

(a) Rotated ignition switch to OFF

position .

(b) Disconnect canister solenoid

valve harness connector EN24.

(c) Rotated ignition switch to ON

position .

(d)

Measure voltage between
canister solenoid valve harness
connector EN24 terminal A and a
reliable ground.

Standard Voltage: 11-14V

(e) Connect canister solenoid valve

harness connector EN24. Is the
value specified value?

NL02-2113b

A

B

EN24 碳罐电磁阀线束连接器

A

Step 4

Inspect canister solenoid valve control circuit.

(a) Rotated ignition switch to OFF

position .

(b) Disconnect canister solenoid

valve harness connector EN24.

(c)

Disconnect ECM harness
connector EN01.

(d) Measure resistance between

canister solenoid valve harness
connector EN24 terminal B and
ECM harness connector EN01
terminal No.57. Inspect whether
the circuit is open.

NL02-2114b

A

B

EN24 碳罐电磁阀线束连接器

B

No

Inspect whether there is an open circuit or a circuit
short to ground between solenoid valve harness
connector EM25 terminal No. A and main relay
terminal No.3. Repair the faulty part. Go to step 7

Yes

Yes

Refer to “2.4.7.3 Replacement of Canister Solenoid Valve”
to replace the canister solenoid valve. Go to Step 7.

No

EN24 canister electromagnetic

valveharness connector

EN24 canister electromagnetic

valveharness connector

852

(e) Measure resistance between

canister solenoid valve harness
connector EN24 terminal B and a
reliable ground. Inspect whether
the circuit is short to ground.

(f)

Measure voltage between
canister solenoid valve harness
connector EN24 terminal B and a
reliable ground. Inspect whether
the circuit is short to power
supply.

NL02-2115b

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

64

Tester Connection

Standard Value

EN24(B)-EN01(64) resistance

Less than 1 Ω

EN24(B)-grounding resistance

10 kΩ or higher

EN24(B)-grounding voltage

0V

Are the values specified values?

Step 5

Inspect the ECM Power Supply Circuits.

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

(b) Inspect whether ECM ground circuit is normal.

Step 6

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 7

Use fault diagnosis tester to confirm if DTC is stored again .

(a) Connect the fault diagnosis tester to the diagnostic interface.

No

Repair or replace the wire harness
connector to step 10.

Yes

No

Repair the faulty part.

Yes

EN01 engine control module harness

connector

853

(b) Turn ignition switch to ON position.

(c) Clear DTC code.

(d) Start and run the engine at idle speed to warm up the engine for at least 5 min.

(e) Read control system DTC code again to confirm that the system has no DTC code exported.

8 Troubleshooting

5. Maintenance

guide

:

Refer to “2.4.8.1 Replacement of Canister Solenoid Valve” to replace the canister solenoid valve.

No

Refer to 2.12.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

854