Geely Emgrand X7. Manual part — 208

3. Circuit

sketch

NL02-2106b

ECM

EN26

B

A

EN26

C

EN26

30

EN01

11

EN01

曲轴位置传感器

N

S

58XH

58XLO

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

Initial Inspection

(a) Inspect the sensor wiring harness connector EN26 whether there is loose or poor connection

and so on.

(b) Inspect whether the sensor is installed correctly.

(c) Inspect whether the sensor gap is normal.

Step 2

Read the engine data (engine speed) on the fault diagnosis tester.

(a) Connect fault diagnosis tester to diagnostic interface.

(b) Turn ignition switch to ON position.

(c) Select Engine/Reading Data/Engine Speed.

(d) Start

the

engine.

(e) With the engine running, read the engine data on the fault diagnosis tester

Standard Value: Normal data. Refer to 2.12.7.9 Data Flow Table

(f) If the engine does not start, inspect the data with the engine running.

No

Repair the faulty part. Go to step 10

Yes

Crankshaft
position sensor

831

(g) f the engine speed is shown as 0, it indicates the circuit between the crankshaft position

sensor and ECM wiring harness open or short.

(a) Rotated ignition switch to OFF position .

(b) Disconnect the crankshaft position sensor harness connector EN26

(c) Measure crankshaft position sensor resistance.

Standard Resistance

25 (77ºF) 900

℃

-1100Ω

(d) Connect the crankshaft position sensor harness connector EN26.

Is the resistance normal?

(a) Rotated ignition switch to OFF

position .

(b) Disconnect the crankshaft

position sensor harness connector
EN26

(c)

Disconnect ECM harness
connector EN01.

(d) Measure resistance between

crankshaft position sensor wiring
harness connector EN26 terminal
No.A and ECM harness
connector EN01 terminal No.30.
Inspect whether the circuit is
open.

NL02-2107b

C

B

A

EN26 曲轴位置传感器线束连接器

A

Step 3

Refer to 2.12.7.4 Fault Symptom Table for intermittent fault.

Step 4

Inspect crankshaft position sensor.

Step 5

Inspect sensor terminal No.A circuit.

No

Refer to 2.10.7.2 “Replacement of Crankshaft Position
Sensor” to replace the crankshaft position sensor. Go to
Step 10.

Yes

Yes

Go to step 4

No

EN26 crankshaft position sensor

harness connector

832

(e) Measure resistance between

crankshaft position sensor
harness connector EN26 terminal
No.A and a reliable ground.
Inspect whether the circuit is
short to ground.

(f) Measure resistance between

crankshaft position sensor
harness connector EN06 terminal
No.A and power supply. Inspect
whether the circuit is short to
power supply.

NL02-2108b

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

30

Test Items

Standard Value

EN26(A)-EN01(30) resistance

Less than 1 Ω

EN26(A)-reliable grounding resistance

10 kΩ or higher

EN26(A)-reliable grounding voltage

0V

Are the values specified values?

Step 6

Inspect sensor terminal B circuit.

(a) Rotated ignition switch to OFF

position .

(b) Disconnect the crankshaft

position sensor harness connector
EN26

(c)

Disconnect ECM harness
connector EN01.

(d) Measure resistance between

crankshaft position sensor wiring
harness connector EN26 terminal
No.B and ECM harness
connector EN01 terminal No.11.
Inspect whether the circuit is
open.

NL02-2109b

C

B

A

EN26 曲轴位置传感器线束连接器

B

No

Repair the faulty part. Go to step 10

Yes

EN01 engine control module harness

connector

EN26 crankshaft position sensor

harness connector

833

(e) Measure resistance between

crankshaft position sensor
harness connector EN26 terminal
No.B and a reliable ground.
Inspect whether the circuit is
short to ground.

(f)

Measure voltage between
crankshaft position sensor wiring
harness connector EN26 terminal
B and power supply. Inspect
whether the circuit is short to
power supply.

NL02-2110b

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

11

Test Items

Standard Value

EN26(B)-EN01(11) resistance

Less than 1 Ω

EN26(B)-reliable grounding resistance

10 kΩ or higher

EN26(B)-reliable grounding voltage

0V

Are the values specified values?

Step 7

Inspect sensor signal plate.

(a) Inspect whether the sensor signal plate is damaged, missing and so on.

(b) Inspect whether the sensor signal plate is installed correctly.

Step 8

Inspect the ECM Power Supply Circuits.

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

(b) Inspect whether ECM ground circuit is normal.

No

Repair the faulty part. Go to step 10

Yes

No

Repair the faulty part. Go to step 10

Yes

EN01 engine control module harness

connector

834