Geely Emgrand X7. Manual part — 63

3. Circuit

sketch

发

动

机
控

制

模

块

曲轴位置传感器

30

ED01 58XHI

58XLO

A

S

N

11

ED01

B

C

NL02-0052c

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 EM07 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 2.2.7.9 Data Flow Table

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

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

sensor and ECM wiring harness open or short.

No

Repair the faulty part. Go to step 10

Yes

Crankshaft position sensor

Engi

ne

co

ntr

ol mo

dul

e

251

Step 3

Refer to 2.2.7.4 Fault Symptom Table for intermittent fault.

Step 4

Inspect crankshaft position sensor.

(a) Rotated ignition switch to OFF

position .

(b)

Disconnect the crankshaft
position sensor wiring harness
connector EM07.

(c) Measure crankshaft position

sensor resistance.

Standard Resistance

25 (77ºF)

℃

900-1100Ω

(d) Connect the crankshaft position

sensor wiring harness connector
EM07.

曲轴位置传感器线束连接器 EM07

A

B

C

NL02-0053c

Is the resistance normal?

(a) Rotated ignition switch to OFF

position .

(b)

Disconnect the crankshaft
position sensor wiring harness
connector EM07.

(c)

Disconnect ECM harness
connector EM01.

(d)

Measure resistance between
crankshaft position sensor wiring
harness connector EM07 terminal
No.A and ECM harness
connector EM01 terminal No.30.
Inspect whether the circuit is
open.

ECM线束连接器

EM01

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

NL02-0033c

(e) Measure resistance between crankshaft position sensor harness connector EM07 terminal

No.A and a reliable ground. Inspect whether the circuit is short to ground.

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

Crankshaft position sensor harness connectorEM07

ECMharness connectorEM01

252

(f) Measure voltage between crankshaft position sensor wiring harness connector EM07 terminal

A and power supply. Inspect whether the circuit is short to power supply.

Test Items

Standard Value

Resistance Between EM07 (A) and EM01 (30)

Less than 1 Ω

Resistance Between EM07 (A) and A Reliable Ground

10 kΩ or higher

Voltage Between EM07 (A) and A Reliable Ground

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 wiring harness connector EM07.

(c) Disconnect ECM harness connector EM01.

(d) Measure resistance between crankshaft position sensor wiring harness connector EM07

terminal No.B and ECM harness connector EM01 terminal No.11. Inspect whether the circuit
is open.

(e) Measure resistance between crankshaft position sensor harness connector EM07 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 EM07 terminal

B and power supply. Inspect whether the circuit is short to power supply.

Test Items

Standard Value

Resistance Between EM07 (B) and EM01 (11)

Less than 1 Ω

Resistance Between EM07 (B) and A Reliable Ground

10 kΩ or higher

Voltage Between EM07 (B) and A Reliable Ground

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.

No

Repair the faulty part. Go to step 10

Yes

No

Repair the faulty part. Go to step 10

Yes

253

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.

Step 9

Replace ECM

(a) Refer to 2.2.7.11 Crankshaft Position Sensor (CKP) Learn to carry out the crankshaft position

sensor learn after replacing the ECM.

Step 10

Use fault diagnosis tester to confirm whether the DTC Code 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) test the vehicle on the road for at least 10 min.

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

Step 11

Troubleshooting

5. Troubleshooting

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

No

Refer to 2.2.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

Next

No

Repair the faulty part.

Yes

No

Repair the faulty part. Go to step 10

Yes

254