2008 NISSAN TEANA Service Manual

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Page 1649 of 5121

NISSAN TEANA 2008 Service Manual EC-188
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0138, P0158 HO2S2
3. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground

Page 1650 of 5121

NISSAN TEANA 2008 Service Manual P0138, P0158 HO2S2
EC-189
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 2 harness connector.
3. Disconnect ECM

Page 1651 of 5121

NISSAN TEANA 2008 Service Manual EC-190
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0138, P0158 HO2S2
Component Inspection
INFOID:0000000003856586
1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO

EC-190
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0138, P0158 HO2S2
Component Inspection
INFOID:0000000003856586
1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK HEATED OXYGEN SENSOR 2
With CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)/(B2)” as the monitor item
with CONSULT-III.
7. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)/(B2)” should be above 0.68 V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.18 V at least once when the “FUEL INJECTION” is −25%.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 6.
3.CHECK HEATED OXYGEN SENSOR 2-I
Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
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. Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK HEATED OXYGEN SENSOR 2-II
Check the voltage between ECM harness connector terminals under the following conditions.
PBIB3458E
ECM
Condition Voltage
Connector+–
Terminal Terminal
F833
[HO2S2 (bank 1)
signal]35
(Sensor
ground)Revving up to 4,000 rpm under no load at
least 10 timesThe voltage should be above 0.68 V at
least once during this procedure.
The voltage should be below 0.18 V at
least once during this procedure. 34
[HO2S2 (bank 2)
signal]

Page 1652 of 5121

NISSAN TEANA 2008 Service Manual P0138, P0158 HO2S2
EC-191
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 5.
5.CHECK HEATED OXYGEN SENSOR 2-I

Page 1653 of 5121

NISSAN TEANA 2008 Service Manual EC-192
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0139, P0159 HO2S2
P0139, P0159 HO2S2
DescriptionINFOID:0000000003856587
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the ox

EC-192
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0139, P0159 HO2S2
P0139, P0159 HO2S2
DescriptionINFOID:0000000003856587
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 LogicINFOID:0000000003856588
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 various driving conditions
such as fuel cut.
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 5.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
For better results, perform “DTC WORK SUPPORT” at a temperature of 0 to 30 °C (32 to 86 °F).
>> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
SEF327R
SEF302U
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0139Heated oxygen sensor 2
(bank 1) circuit slow re-
sponse
It takes more time for the sensor to respond be-
tween 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 P0159Heated oxygen sensor 2
(bank 2) circuit slow re-
sponse

Page 1654 of 5121

NISSAN TEANA 2008 Service Manual P0139, P0159 HO2S2
EC-193
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and wa

P0139, P0159 HO2S2
EC-193
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Open engine hood.
7. Select “HO2S2 (B1) P0139” or “HO2S2 (B2) P0159” of “HO2S2” in “DTC WORK SUPPORT” mode with
CONSULT-III.
8. Follow the instruction of CONSULT-III.
NOTE:
It will take at most 10 minutes until “COMPLETED” is displayed.
9. Touch “SELF-DIAG RESULTS”.
Which is displayed on CONSULT-III screen?
OK >> INSPECTION END
NG >> Go to EC-194, "
Diagnosis Procedure".
CAN NOT BE DIAGNOSED>>GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE AGAIN
1. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
2. Perform DTC confirmation procedure again.
>> GO TO 3.
5.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to EC-193, "
Component Function Check".
NOTE:
Use component function check to check the overall function of the heated oxygen sensor 2 circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-194, "
Diagnosis Procedure".
Component Function CheckINFOID:0000000003856589
1.PERFORM COMPONENT FUNCTION CHECK-I
Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
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. Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.PERFORM COMPONENT FUNCTION CHECK-II
Check the voltage between ECM harness connector terminals under the following conditions.
DTCECM
Condition Voltage
Connec-
tor+–
Te r m i n a l Te r m i n a l
P0139
F833
[HO2S2 (bank 1)
signal]35
(Sensor
ground)Revving up to 4,000 rpm under no
load at least 10 timesA change of voltage should be more
than 0.12 V for 1 second during this
procedure.
P015934
[HO2S2 (bank 2)
signal]

Page 1655 of 5121

NISSAN TEANA 2008 Service Manual EC-194
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0139, P0159 HO2S2
.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 3.
3.PERFORM COMPONENT FUNCTION CHECK-III
Check the voltage betwe

Page 1656 of 5121

NISSAN TEANA 2008 Service Manual P0139, P0159 HO2S2
EC-195
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
C
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EC
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5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >>

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