Geely Emgrand X7. Manual part — 188

Is resistance the specified value?

Step 3

Measure temperature sensor of engine coolant signal circuit.

(a) Rotated ignition switch to OFF

position .

(b)

Disconnect the temperature
sensor of engine coolant harness
connector EN23.

(c) Rotated ignition switch to ON

position .

(d)

Measure voltage between
temperature sensor of engine
coolant EN23 terminal No.3 and
a reliable ground.

Standard Voltage: 4.7-5.5V

(e) Connect the temperature sensor

of engine coolant harness
connector EN23.

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3

2

1

EN23 发动机冷却液传感器线束连接器

3

Is the voltage normal?

Step 4

Measure ground circuit of temperature sensor of engine coolant.

(a) Rotated ignition switch to OFF

position .

(b)

Disconnect the temperature
sensor of engine coolant harness
connector EN23.

(c) Rotated ignition switch to ON

position .

(d) Measure resistance between

temperature sensor of engine
coolant harness connector EN23
terminal No.1 and reliable
ground.

Standard Resistance: Less than 3 Ω

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3

2

1

EN23 发动机冷却液传感器线束连接器

1

No

Go to step 5

Yes

No

Replace the temperature sensor of engine
coolant, go to step 9.

Yes

EN23 engine coolant sensor harness

connector

EN23 engine coolant sensor harness

connector

751

(e) Connect the temperature sensor

of engine coolant harness
connector EN23.

Is the resistance normal?

Step 5

Inspect the temperature sensor of engine coolant signal circuit.

(a) Rotated ignition switch to OFF

position .

(b)

Disconnect the temperature
sensor of engine coolant harness
connector EN23.

(c)

Disconnect ECM harness
connector EN01.

(d) Measure resistance between

engine coolant temperature
sensor wire harness connector
EM23 terminal 3 and ECM wire
harness connector terminal 49.
Inspect whether there is
short-circuit situation.

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2

1

EN23 发动机冷却液传感器线束连接器

3

(e) Measure resistance between

engine coolant temperature
sensor wire harness connector
EN23 terminal 3 and reliable
grounding. Inspect whether there
is grounding short-circuit.

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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

49

(f) Measure voltage between temperature sensor of engine coolant wiring harness connector

EN23 terminal No.3 and a reliable ground. Inspect whether the circuit is short to power
supply.

Test Items

Standard Value

EN23(3)-EN01(49)Resistance value

Less than 1 Ω

No

Go to step 6

Yes

Go to step 7

EN23 engine coolant sensor harness

connector

EN01 engine control module harness

connector

752

Resistance Between EN23 (3) and a Reliable Ground

10kΩ 或更高

Voltage Between EN23 (3) and a Reliable Ground

0V

Step 6

Inspect the temperature sensor of engine coolant ground circuit.

(a) Rotated ignition switch to OFF

position .

(b)

Disconnect the temperature
sensor of engine coolant harness
connector EN23.

(c)

Disconnect ECM harness
connector EN01.

(d)

Measure resistance between
engine coolant temperature
sensor wire harness connector
EN23 terminal 1 and ECM wire
harness connector terminal 74.
Inspect whether there is
short-circuit situation, if yes,
repair fault position.

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2

1

EN23 发动机冷却液传感器线束连接器

1

(e)

Measure voltage between
temperature sensor of engine
coolant harness connector EN23
terminal No.1 and a reliable
ground. Inspect whether the
circuit is short to power supply.
Otherwise, repair the faulty part.

NL02-2053b

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

74

Test Items

Standard Value

EN23(3)-EN01(29) Less

than

1

Ω

Voltage Between EN23 (3) and a Reliable Ground

0V

Execute next step as per normal.

Next

Go to step 7

EN01 engine control module harness

connector

EN23 engine coolant sensor harness

connector

753

Step 7

Inspect the ECM Power Supply Circuits.

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

(b) Inspect whether ECM ground circuit is normal.

Step 8

Replace ECM

(a) Refer to 2.12.8.1 Replacement of Engine Control Module to Replace ECM.

(b) Carry out the crankshaft position sensor learning, refer to 2.12.7.11 “Crankshaft Position

Sensor (CKP) Learning.

Step 9

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

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

(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.

Step 10

Troubleshooting

5. Maintenance

guide

:

Replace the temperature sensor of engine coolant. Refer to 2.12.8.2 Replacement of temperature
sensor of engine coolant.

No

Refer to 2.12.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

Next

No

Repair the faulty part.

Yes

Next

754