Geely Emgrand X7. Manual part — 207

(e) Measure resistance between

knock sensor harness connector
EN08 terminal No.1 and a
reliable ground. Inspect whether
the circuit is short to ground.

(f) Measure resistance between

knock sensor harness connector
EN08 terminal No.1 and a
reliable ground. Inspect whether
the circuit is short to power
supply.

NL02-2103b

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

36

Test Items

Standard Value

EN08(1)-EN01(36) resistance

Less than 1 Ω

EN08(1)-reliable grounding resistance

10 kΩ or higher

EN08(1)-reliable grounding voltage

0V

Are the values specified values?

Step 6

Inspect sensor terminal No.2 circuit.

(a) Rotated ignition switch to OFF

position .

(b)

Disconnect Knock Sensor
harness connector EN08.

(c)

Disconnect ECM harness
connector EN01.

(d) Measure resistance between

knock sensor harness connector
EN08 terminal No.2 and ECM
harness connector EN01 terminal
No.37. Inspect whether the
circuit is open.

NL02-2104b

1

2

EN08 爆震传感器线束连接器

2

No

Repair the faulty part. Go to step 9

Yes

EN01 engine control module harness

connector

EN08 knock sensor harness connector

827

(e) Measure resistance between

knock sensor harness connector
EN08 terminal No.2 and a
reliable ground. Inspect whether
the circuit is short to ground.

(f) Measure resistance between

knock sensor harness connector
EN08 terminal No.2 and a
reliable ground. Inspect whether
the circuit is short to power
supply.

NL02-2105b

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

37

Test Items

Standard Value

EN08(2)-EN01(37) resistance

Less than 1 Ω

EN08(2)-reliable grounding resistance

10 kΩ or higher

EN08(2)-reliable grounding voltage

0V

Are the values specified values?

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

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

Yes

No

Repair the faulty part. Go to step 12

Yes

No

Go to step 12

Yes

EN01 engine control module harness

connector

828

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) 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 10

Troubleshooting

5. Maintenance

guide

:

Refer to 2.10.7.5 Replacement of Knock Sensor to replace the knock sensor.

No

Repair the faulty part. Go to step 13

Yes

829

2.12.7.35 DTC P0335,P0336

1. DTC

description:

DTC P0335

No signal from crankshaft position sensor circuit

DTC P0336

Crankshaft Position Sensor Circuit Signal Interference

CKP sensor signal provides ECM with current crankshaft speed and position. CKP sensor
produces an alternating voltage with different amplitude and frequency. Frequency depends on the
crankshaft speed and the AC output voltage depends on the CKP. CKP sensor works with a fixed
58X variable reluctance rotor on the crankshaft. ECM calculates the ignition timing, injection
timing, and knock ignition timing based on CKP sensor and camshaft position sensor input signals.
CKP sensor is also used to detect misfire and tachometer display. ECM uses CAN network to send
the engine speed signal to the instrument.

CKP sensor signal is sent through CKP sensor harness connector EN26 terminals A, B to ECM
harness connector No.EN01 terminals No.30 and 11.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection
Strategy

Conditions For Setting The DTC
(Control Strategy)

Fault Locations

P0335

Hardware Circuit
Inspection

1. During startup, the crankshaft

position sensor is
disconnected, short to Ground
and short to power supply.

2. Fault timer accumulated time

is longer than 2 s.

P0337

Hardware Circuit
Inspection

1. Crankshaft position sensor

and the signal tooth gap is too
large.

2. The difference between actual

identified number of teeth and
58 teeth is larger than a
specified value.

1. Sensor

Circuit

2. Sensor

3. ECM

4. Sensor

signal

disc

830