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Engine
Pre-catalytic Oxygen Sensor Harness
Connector EO02
A
ECM Harness Connector EO01
16
15
14
13
12
73
32
31
30
29
28
52
51
50
49
48
47
46
45
44
72
71
70
69
68
67
66
65
64
Step 12
Check pre-catalytic oxygen sensor ground circuit..
B
C
D
11
10
9
8
7
6
5
4
3
2
27
26
25
24
23
22
21
20
19
18
43
42
41
40
39
38
37
36
35
34
63
62
61
60
59
58
57
56
55
54
FE02-5350b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect oxygen sensor wiring harness connector EO02.
(c)
Disconnect ECM harness connector EO01.
(d)
Measure resistance between pre-catalytic oxygen sensor
wiring harness connector EO02 terminal B and ECM harness
connector terminal No.10. Check whether the circuit is open.
otherwise, repair the faulty part.
(e)
Measure resistance between pre-catalytic oxygen sensor
wiring harness connector EO02 terminal B and a reliable
ground. Check whether the circuit is short to ground.
otherwise, repair the faulty part.
(f)
Measure voltage between pre-catalytic oxygen sensor wiring
harness connector EO02 terminal B and a reliable ground.
Check whether the circuit is short to power supply. Otherwise,
repair the faulty part.
1
17
Resistance Between EO02 (B) and EO01
33
53
(10)
Resistance Between EO02 (B) and A
Reliable Ground
Voltage Between EO02 (B) and A Reliable
Ground
Normal
Control System JL4G15-D
Test Items
Go to step 15
EC718/EC718RV EC715/EC715RV 10/2009
2-675
Standard Value
Less than 1 Ω
10 kΩ or higher
0 V
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