Yes
Step 8
Measure pre-catalytic oxygen sensor signal circuit.
FE02-5348b
A
B
C
D
Pre-catalytic Oxygen Sensor Harness
Connector EO02
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect oxygen sensor wiring harness connector EO02.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure pre-catalytic oxygen sensor wiring harness
connector terminal No. EO02 B, the voltage between ground
and reliable value.
Standard Voltage Value: 0.35-0.5 V
(e)
Connect pre-catalytic oxygen sensor wiring harness
connector EO02.
Is the voltage specified value?
No
Yes
Step 9
Measure pre-catalytic oxygen sensor ground circuit.
FE02-5349b
A
B
C
D
Pre-catalytic Oxygen Sensor Harness
Connector EO02
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect oxygen sensor wiring harness connector EN02.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure resistance between Pre-Catalytic oxygen sensor
EO02 terminal A and a reliable ground.
Standard Resistance: Less than 1 Ω
(e)
Connect pre-catalytic oxygen sensor wiring harness
connector EO02.
Is the resistance specified value?
No
Yes
Step 10
Replace the pre-catalytic oxygen sensor. Refer to
Pre-Catalytic Oxygen Sensor Replacement
.
Next
Step 11
Check pre-catalytic oxygen sensor signal circuit.
2-674
Control System JL4G15-D
Engine
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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