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2-676
Control System JL4G15-D
Pre-catalytic Oxygen Sensor Harness
Connector EO02
A
ECM Harness Connector EO01
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15
14
13
12
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Next
Step 13
Check ECM power supply circuit.
Yes
Step 14
Replace ECM.
Next
Use scan tool to confirm whether the DTC code is stored again.
Step 15
EC718/EC718RV EC715/EC715RV 10/2009
B
C
D
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10
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2
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FE02-5351b
(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.
1
17
Resistance Between EO02 (A) and EO01 (2)
33
53
Resistance Between EO02 (A) and A Reliable
Ground
Voltage Between EO02 (A) and A Reliable
Ground
Execute next step as per normal.
(a)
Check whether ECM power supply circuit is normal.
(b)
Check whether ECM ground circuit is normal.
No
(a)
Replace ECM. Refer to
Replacement.
(b)
Carry out crankshaft position sensor self learn. Refer to
2.12.7.11 Crankshaft Position Sensor (CKP)
(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.
Test Items
Repair the faulty part.
2.2.8.8 Engine Control Module
Engine
Standard Value
Less than 1 Ω
10 kΩ or higher
0 V
Learn.
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