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2-684
Control System JL4G15-D
check Post-Catalytic oxygen sensor signal circuit.
Step 11
Post-catalytic Oxygen Sensor Harness
Connector EO03
A
ECM Harness Connector EO01
16
15
14
13
12
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30
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45
44
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64
Check Post-Catalytic oxygen sensor ground circuit.
Step 12
EC718/EC718RV EC715/EC715RV 10/2009
B
C
D
11
10
9
8
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6
5
4
3
2
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FE02-5356b
Next
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect the oxygen sensor wiring harness connector
EO03.
(c)
Disconnect ECM harness connector EO01.
(d)
Measure resistance between oxygen sensor wiring harness
connector EO03 terminal B and ECM harness connector
terminal No.30. Check whether the circuit is open. otherwise,
repair the faulty part.
(e)
Measure resistance between oxygen sensor wiring harness
connector EO03 terminal B and a reliable ground. Check
whether the circuit is short to ground. otherwise, repair the
faulty part.
(f)
Measure voltage between oxygen sensor wiring harness
connector EO03 terminal B and a reliable ground. Check
whether the circuit is short to power supply. otherwise, repair
the faulty part.
1
Resistance between EO03 (B) and EO01
(30)
Resistance between EO03 (B) and a reliable
ground
Voltage between EO03 (B) and a reliable
ground
normal
Go to step 15
Test Items
Go to step 13
Engine
Standard Value
Less than 1 Ω
10 kΩ or higher
0 V
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