Geely EC718, EC718RV, EC715, EC715RV. Manual part — 61
Geely EC718, EC718RV, EC715, EC715RV. Manual part - 61
4. Diagnostic Steps:
Note
Before carrying out this diagnosis step, observe the data list on scan tool and analyze the accuracy of the data, as
these will help with quick diagnosis.
Step 1
Initial Inspection
(a)
Check whether there is KS sensor physical damage.
(b)
Check whether KS sensor is installed correctly. Torque is set
too tight or too loose will trigger DTC codes.
(c)
Check KS sensor installation surface whether there are
glitches, casting flash and foreign matter.
(d)
Knock sensor must be kept away from hoses, brackets and
engine wires.
Are above mentioned parts normal?
No
Repair the faulty part. Go to step 9
Yes
Step 2
Read the engine data (engine speed) on the scan tool.
(a)
Connect scan tool to datalink connector.
(b)
Turn the ignition switch to "ON" position.
(c)
Select "Engine"/"Read Data"/"Knock Sensor Signal 1".
(d)
Start and run the engine at normal working temperature.
(e)
Road test the vehicle and read the engine speed data on the
scan tool.
Is data normal?
Standard Value: Normal data. Refer to
No
Yes
Step 3
Intermittent Fault. Refer to
Step 4
Check the knock sensor.
Engine
Control System JL4G18-D
2-159
Knock Sensor
FE02-5083b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect Knock Sensor harness connector EN08.
(c)
Measure knock sensor resistance.
Standard Resistance: 49 kΩ at 20°C (68 ºF)
(d)
Connect Knock Sensor harness connector EN08.
Is resistance normal?
No
Replace the knock sensor. Refer to
Yes
Step 5
Check sensor terminal No.1 circuit.
1
3
5
7
8
6
4
2
9
10
11
12
13
23
24
25
26
27
28
29
30
37
51
52
53
54
55
56
57
58
59
60
61
62
63
64
38
39
40
41
42
43
44
45
46
47
48
49
50
31
32
33
34
35
36
14
15
16
17
18
19
20
21
22
ECM Harness Connector EN01
Knock Sensor Harness Connector EN08
1
2
FE02-5084b
(a)
Turn the 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.1 and ECM harness connector
EN01 terminal No.30. Check whether the circuit is open.
(e)
Measure resistance between knock sensor harness
connector EN08 terminal No.1 and a reliable ground. Check
whether the circuit is short to ground.
(f)
Measure voltage between knock sensor harness connector
EN08 terminal No.1 and power supply. Check whether the
circuit is short to power supply.
Test Items
Standard Value
Resistance Between EN08 (1) and EN01 (30)
Less than 1 Ω
Resistance Between EN08 (1) and a Reliable
Ground
10 kΩ or higher
Voltage Between EN08 (1) and a Reliable
Ground
0 V
Are the values specified values?
No
Repair the faulty part. Go to step 9
Yes
Step 6
Check sensor terminal No.2 circuit.
2-160
Control System JL4G18-D
Engine
1
3
5
7
8
6
4
2
9
10
11
12
13
23
24
25
26
27
28
29
30
37
51
52
53
54
55
56
57
58
59
60
61
62
63
64
38
39
40
41
42
43
44
45
46
47
48
49
50
31
32
33
34
35
36
14
15
16
17
18
19
20
21
22
ECM Harness Connector EN01
Knock Sensor Harness Connector EN08
1
2
FE02-5085b
(a)
Turn the 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.31. Check whether the circuit is open.
(e)
Measure resistance between knock sensor harness
connector EN08 terminal No.2 and a reliable ground. Check
whether the circuit is short to ground.
(f)
Measure voltage between knock sensor harness connector
EN08 terminal No.2 and power supply. Check whether the
circuit is short to power supply.
Test Items
Standard Value
Resistance Between EN08 (2) and EN01 (31)
Less than 1 Ω
Resistance Between EN08 (2) and a Reliable
Ground
10 kΩ or higher
Voltage Between EN08 (2) and a Reliable
Ground
0 V
Are the values specified values?
No
Repair the faulty part. Go to step 9
Yes
Step 7
Check ECM power supply circuit.
(a)
Check whether ECM power supply circuit is normal.
(b)
Check whether ECM ground circuit is normal.
No
Repair the faulty part.
Yes
Step 8
Replace ECM.
Next
Step 9
Use scan tool to confirm whether the DTC code is stored again.
(a)
Connect scan tool to the datalink connector.
(b)
Turn the 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)
Road test the vehicle for at least 10 min.
(f)
Read control system DTC code again to confirm that the
system has no DTC code.
No
Intermittent Fault. Refer to
Engine
Control System JL4G18-D
2-161
Yes
Step 10
Diagnostic completed.
5. Repair Instructions:
Replaced the knock sensor. Refer to
.
2.2.7.31 DTC P0340-P0343
1. DTC Descriptor:
DTC
P0340
Camshaft Position Sensor Incorrectly Installed
DTC
P0341
Camshaft Position Sensor Poor Connection
DTC
P0342
Camshaft Position Sensor Circuit Short to Ground
DTC
P0343
Camshaft Position Sensor Circuit Short to Power Supply
CMP links the crankshaft position to the camshaft position, so that ECM calculates cylinder No.1 compression TDC and determines
at what time to which cylinder spray fuel.
Camshaft position sensor circuit includes the following:
–
Reference Voltage: ECM provides a reference voltage to CMP sensor harness connector EN15 terminal No.1 via ECM harness
connector EN01 terminal No.39.
–
Signal Circuit: ECM receives signal voltage from CMP sensor harness connector EN15 terminal No.2 via ECM harness connector
EN01 terminal No.42.
ECM Low Reference Voltage Circuit: ECM provides a low reference voltage to CMP sensor harness connector EN15 terminal No.
3 via ECM harness connector EN01 terminal No.14 and 18.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The DTC
(Control Strategy)
Fault Locations
P0340
Poor Connection
1. Phase signal register value is
equal to 255, or equal to 0.
2. Phase signal transition count is
greater than 4.
1. Sensor Circuit
2. Sensor
3. ECM
P0341
Poor Connection
Phase signal register value is greater
than 0 and less than 255 at the same
time does not equal 170 and 85.
P0342
Short to Ground
Phase signal register value is equal to
0.
P0343
Short to Power Supply
Phase signal register value is equal to
255.
2-162
Control System JL4G18-D
Engine
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