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
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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