Geely EC718 2009 Workshop Manual page 242

2-160 Control System JL4G18-D
Knock Sensor
Yes
Check sensor terminal No.1 circuit.
Step 5
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 sensor terminal No.2 circuit.
Step 6
EC718/EC718RV EC715/EC715RV 10/2009
FE02-5083b
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
2 1
14 13 12 11 10 9
FE02-5084b
(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?
Replace the knock sensor. Refer to
No
2.10.8.5 Knock Sensor
step 9
(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
Resistance Between EN08 (1) and EN01 (30)
Resistance Between EN08 (1) and a Reliable
Ground
Voltage Between EN08 (1) and a Reliable
Ground
Are the values specified values?
Repair the faulty part. Go to step 9
No
Engine
Replacement. Go to
Standard Value
Less than 1 Ω
10 kΩ or higher
0 V