FE02-5015b
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Post-catalytic Oxygen Sensor Harness
Connector EN03
ECM Harness Connector EN01
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect the post-catalytic oxygen sensor wiring harness
connector EN03.
(c)
Disconnect ECM harness connector EN01.
(d)
Measure the continuity between the post-catalytic oxygen
sensor wiring harness connector EN03 terminal No.2 and
ECM harness connector EN01 terminal No.4.
Standard Resistance: Less than 1 Ω
(e)
Connect ECM harness connector EN01.
(f)
Connect the post-catalytic oxygen sensor wiring harness
connector EN03.
Is resistance the specified value?
No
ECM control circuit malfunction
Yes
Step 5
Check ECM working circuit.
(a)
Check whether ECM power supply circuit is normal.
(b)
Check whether ECM ground circuit is normal.
No
Repair the faulty part.
Yes
Step 6
Replace ECM. Refer to
Engine Control Module Replacement
.
Next
Step 7
Use scan tool to confirm whether the DTC code is stored again.
(a)
Connect scan tool to the datalink connector.
(b)
Turn the ignition switch to "ON" position.
(c)
Clear DTC code.
(d)
Start and run the engine at idle speed to warm up the engine
for at least 5 min.
(e)
Road test the vehicle for at least 5 min.
(f)
Read control system DTC code again to confirm that the
system has no DTC code.
No
Intermittent Fault. Refer to
2-86
Control System JL4G18-D
Engine
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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