Geely EC718 2009 Workshop Manual page 243

Engine
Knock Sensor Harness Connector EN08
ECM Harness Connector EN01
64 63 62
61 60 59 58 57
50 49 48 47 46 45 44 43
36 35 34 33 32 31 30 29
22 21 20 19 18 17 16 15
Yes
Check ECM power supply circuit.
Step 7
Yes
Replace ECM.
Step 8
Next
Use scan tool to confirm whether the DTC code is stored again.
Step 9
1 2
56 55 54 53 52 51
8 7
6
5
42 41 40 39 38 37
28 27 26 25 24 23
3
4
1
2
14 13 12 11 10 9
FE02-5085b
Control System JL4G18-D
(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
Resistance Between EN08 (2) and EN01 (31)
Resistance Between EN08 (2) and a Reliable
Ground
Voltage Between EN08 (2) and a Reliable
Ground
Are the values specified values?
Repair the faulty part. Go to step 9
No
(a) Check whether ECM power supply circuit is normal.
(b) Check whether ECM ground circuit is normal.
Repair the faulty part.
No
(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.
Intermittent Fault. Refer to
No
Fault Check
EC718/EC718RV EC715/EC715RV 10/2009
2-161
Standard Value
Less than 1 Ω
10 kΩ or higher
0 V
2.2.7.3 Intermittent