2009 NISSAN TIIDA Service Repair Manual

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NISSAN TIIDA 2009 Service Repair Manual P0139 HO2S2
EC-221
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P0139 HO2S2
Description INFOID:0000000004780130
The heated oxygen sensor 2, after three way catalyst (manif

P0139 HO2S2
EC-221
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P0139 HO2S2
Description INFOID:0000000004780130
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air-fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1 V in richer conditions to 0 V in leaner con-
ditions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
DTC Logic INFOID:0000000004780131
DTC DETECTION LOGIC The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxy-
gen storage capacity of the three way catalyst (manifold) causes the
longer switching time. To judge the malfunctions of heated oxygen
sensor 2, ECM monitors whether the switching response of the sen-
sor's voltage is faster than specified during the various driving condi-
tion such as fuel-cut.
DTC CONFIRMATION PROCEDURE 1.
INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III? YES >> GO TO 2.
NO >> GO TO 5. 2.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 3. 3.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to normal operating temperature. SEF327R
SEF302U
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0139 Heated oxygen sensor 2
circuit slow response It takes more time for the sensor to respond
between rich and lean than the specified
time. • Harness or connectors
(The sensor circuit is open or shorted)
• Heated oxygen sensor 2
• Fuel pressure
• Fuel injector
• Intake air leaks

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NISSAN TIIDA 2009 Service Repair Manual EC-222< COMPONENT DIAGNOSIS >
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P0139 HO2S2
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Open

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NISSAN TIIDA 2009 Service Repair Manual P0139 HO2S2
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Check the voltage between ECM harness connector and ground
under the following condition.
Is the inspection

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NISSAN TIIDA 2009 Service Repair Manual EC-224< COMPONENT DIAGNOSIS >
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P0139 HO2S2
Wiring Diagram INFOID:0000000004780714
Diagnosis Procedure INFOID:00000000047801331.
CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check gr

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NISSAN TIIDA 2009 Service Repair Manual EC
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YES >> GO TO 2.
NO >> Repair or replace ground connection. MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement " .
2. Run engine for at least 10 minutes at idle speed.
Is t

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NISSAN TIIDA 2009 Service Repair Manual EC-226< COMPONENT DIAGNOSIS >
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P0139 HO2S2 6.
REPLACE HEATED OXYGEN SENSOR 2
Replace heated oxygen sensor 2.
CAUTION:
• Discard any sensor which has been dropped from a he ight of more than

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NISSAN TIIDA 2009 Service Repair Manual P0139 HO2S2
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5. Check the voltage between ECM harness connector and ground
under the following condition.
Is the inspection resul

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