FE02-5351b
1
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A
B
C
D
Pre-catalytic Oxygen Sensor Harness
Connector EO02
ECM Harness Connector EO01
(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 A and ECM harness
connector terminal No.2. Check whether the circuit is open.
otherwise, repair the faulty part.
(e)
Measure resistance between pre-catalytic oxygen sensor
wiring harness connector EO02 terminal A 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 A and a reliable ground.
Check whether the circuit is short to power supply. otherwise,
repair the faulty part.
Test Items
Standard Value
Resistance Between EO02 (A) and EO01 (2)
Less than 1 Ω
Resistance Between EO02 (A) and A Reliable
Ground
10 kΩ or higher
Voltage Between EO02 (A) and A Reliable
Ground
0 V
Execute next step as per normal.
Next
Step 13
Check ECM power supply 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 14
Replace ECM.
(a)
Replace ECM. Refer to
(b)
Carry out crankshaft position sensor self learn. Refer to
Crankshaft Position Sensor (CKP) Learn
Next
Step 15
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 10 min.
2-676
Control System JL4G15-D
Engine
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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