No
Yes
Step 7
Inspect the exhaust system seal.
(a)
Check whether the three-way catalytic converter looks good
(signs of excessive heat and gasket missing, etc.).
(b)
Check whether the exhaust pipe is intact, whether the gasket
is intact.
No
replace the damaged parts. Go to step 15
Step 8
measure oxygen sensor signal circuit.
FE02-5354b
A
B
C
D
Post-catalytic Oxygen Sensor Harness
Connector EO03
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect the oxygen sensor wiring harness connector
EO03.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure voltage between oxygen sensor wiring harness
connector EO03 terminal B and a reliable ground.
Standard Voltage Value: 0.35-0.5 V
(e)
Connect the oxygen sensor wiring harness connector EO03.
Is the voltage specified value?
No
Yes
Step 9
Measure Post-Catalytic oxygen sensor ground circuit.
FE02-5355b
A
B
C
D
Post-catalytic Oxygen Sensor Harness
Connector EO03
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect the oxygen sensor wiring harness connector
EO03.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure resistance between oxygen sensor EO03 terminal
A and a reliable ground.
Standard Resistance: Less than 1 Ω
(e)
Connect the oxygen sensor wiring harness connector EO03.
Is the resistance specified value?
No
Yes
Step 10
replace the oxygen sensor.
Engine
Control System JL4G15-D
2-683
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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