fuel cap NISSAN TEANA 2008 Service Manual

EC-10
< BASIC INSPECTION >[VQ25DE, VQ35DE]
DIAGNOSIS AND REPAIR WORKFLOW
Diagnostic Work Sheet
INFOID:0000000003856443
DESCRIPTION
There are many operating conditions that lead to the malfunction of
engine components. A good grasp of such conditions can make trou-
bleshooting faster and more accurate.
In general, each customer feels differently about an incident. It is
important to fully understand the symptoms or conditions for a cus-
tomer complaint.
Utilize a diagnostic worksheet like the WORKSHEET SAMPLE
below in order to organize all the information for troubleshooting.
Some conditions may cause the MI to come on steady or blink, and
DTC to be detected. Examples:
 Vehicle ran out of fuel, which caused the engine to misfire.
 Fuel filler cap was left off or incorrectly screwed on, allowing fuel to
evaporate into the atmosphere.
WORKSHEET SAMPLE
SEF907L
MTBL0017

EC-130
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
22.CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each
indication is within the SP value.
Is the measurement value within the SP value?
YES >> Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to EC-150, "Diagno-
sis Procedure". Then GO TO 29.
NO >> GO TO 23.
23.CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> GO TO 24.
NO >> More than the SP value: Replace mass air flow sensor, and then GO TO 29.
24.REPLACE ECM
1. Replace ECM.
2. Refer to EC-14, "
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
>> GO TO 29.
25.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
 Crushed air ducts
 Malfunctioning seal in air cleaner element
 Uneven dirt in air cleaner element
 Improper specification in intake air system
Is the inspection result normal?
YES >> GO TO 27.
NO >> Repair or replace malfunctioning part, and then GO TO 26.
26.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Less than the SP value: GO TO 27.
27.CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> GO TO 28.
NO >> Less than the SP value: Replace mass air flow sensor, and then GO TO 30.
28.CHECK INTAKE SYSTEM
Check for the cause of air leak after the mass air flow sensor. Refer to the following.
 Disconnection, looseness, and cracks in air duct
 Looseness of oil filler cap
 Disconnection of oil level gauge
 Open stuck, breakage, hose disconnection, or cracks in PCV valve
 Disconnection or cracks in EVAP purge hose, stuck open EVAP canister purge volume control solenoid
valve
 Malfunctioning seal in rocker cover gasket
 Disconnection, looseness, or cracks in hoses, such as a vacuum hose, connecting to intake air system parts

P0130, P0150 A/F SENSOR 1
EC-163
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P0130, P0150 A/F SENSOR 1
DescriptionINFOID:0000000003856564
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of about 800°C
(1,472°F).
DTC LogicINFOID:0000000003856565
DTC DETECTION LOGIC
To judge malfunctions, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 sig-
nal fluctuates according to fuel feedback control.
DTC CONFIRMATION PROCEDURE
1.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:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
1. Start engine and warm it up to normal operating temperature.
JMBIA0112GB
PBIB3354E
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P0130Air fuel ratio (A/F) sensor 1
(bank 1) circuitA)The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly in a range other
than approx. 2.2 V. Harness or connectors
(The A/F sensor 1 circuit is open
or shorted.)
 A/F sensor 1
B)The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 2.2 V.
P0150Air fuel ratio (A/F) sensor 1
(bank 2) circuitA)The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly in a range other
than approx. 2.2 V. Harness or connectors
(The A/F sensor 1 circuit is open
or shorted.)
 A/F sensor 1
B)The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 2.2 V.

P0131, P0151 A/F SENSOR 1
EC-167
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P0131, P0151 A/F SENSOR 1
DescriptionINFOID:0000000003856568
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of about 800°C
(1,472°F).
DTC LogicINFOID:0000000003856569
DTC DETECTION LOGIC
To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1
signal is not inordinately low.
DTC CONFIRMATION PROCEDURE
1.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:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.
>> GO TO 2.
2.CHECK A/F SENSOR 1 FUNCTION
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)” in “DATA MONITOR” mode with CONSULT-III.
3. Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
With GST
Follow the procedure “With CONSULT-III” above.
Is the indication constantly approx. 0 V?
JMBIA0112GB
PBIB3354E
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P0131Air fuel ratio (A/F) sensor 1
(bank 1) circuit low voltage
 The A/F signal computed by ECM from the A/
F sensor 1 signal is constantly approx. 0 V. Harness or connectors
(The A/F sensor 1 circuit is open or
shorted.)
 A/F sensor 1 P0151Air fuel ratio (A/F) sensor 1
(bank 2) circuit low voltage

EC-170
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0132, P0152 A/F SENSOR 1
P0132, P0152 A/F SENSOR 1
DescriptionINFOID:0000000003856571
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of about 800°C
(1,472°F).
DTC LogicINFOID:0000000003856572
DTC DETECTION LOGIC
To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1
signal is not inordinately high.
DTC CONFIRMATION PROCEDURE
1.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:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.
>> GO TO 2.
2.CHECK A/F SENSOR 1 FUNCTION
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)” in “DATA MONITOR” mode with CONSULT-III.
3. Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
With GST
Follow the procedure “With CONSULT-III” above.
Is the indication constantly approx. 5 V?
JMBIA0112GB
PBIB3354E
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P0132Air fuel ratio (A/F) sensor 1
(bank 1) circuit high voltage
 The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 5 V. Harness or connectors
(The A/F sensor 1 circuit is open or
shorted.)
 A/F sensor 1 P0152Air fuel ratio (A/F) sensor 1
(bank 2) circuit high voltage

P0133, P0153 A/F SENSOR 1
EC-173
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P0133, P0153 A/F SENSOR 1
DescriptionINFOID:0000000003856574
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of about 800°C
(1,472°F).
DTC LogicINFOID:0000000003856575
DTC DETECTION LOGIC
To judge the malfunction of A/F sensor 1, this diagnosis measures response time of the A/F signal computed
by ECM from the A/F sensor 1 signal. The time is compensated by engine operating (speed and load), fuel
feedback control constant, and the A/F sensor 1 temperature index. Judgment is based on whether the com-
pensated time (the A/F signal cycling time index) is inordinately long or not.
DTC CONFIRMATION PROCEDURE
1.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:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 5.
JMBIA0112GB
PBIB3354E
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P0133Air fuel ratio (A/F) sensor 1
(bank 1) circuit slow re-
sponse
 The response of the A/F signal computed by
ECM from A/F sensor 1 signal takes more than
the specified time. Harness or connectors
(The A/F sensor 1 circuit is open or
shorted.)
 A/F sensor 1
 A/F sensor 1 heater
 Fuel pressure
 Fuel injector
 Intake air leaks
 Exhaust gas leaks
PCV
 Mass air flow sensor P0153Air fuel ratio (A/F) sensor 1
(bank 2) circuit slow re-
sponse

EC-178
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0137, P0157 HO2S2
P0137, P0157 HO2S2
DescriptionINFOID:0000000003856577
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:0000000003856578
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 maximum voltage of the sensor
is sufficiently high 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
SEF259VA
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0137Heated oxygen sensor 2
(bank 1) circuit low volt-
age
The maximum voltage from the sensor does not
reach the specified voltage. Harness or connectors
(The sensor circuit is open or shorted)
 Heated oxygen sensor 2
 Fuel pressure
 Fuel injector
 Intake air leaks P0157Heated oxygen sensor 2
(bank 2) circuit low volt-
age

EC-184
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0138, P0158 HO2S2
P0138, P0158 HO2S2
DescriptionINFOID:0000000003856582
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:0000000003856583
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 oxygen storage capacity of the three way catalyst (manifold) causes the longer switching
time.
MALFUNCTION A
To judge the malfunctions of heated oxygen sensor 2, ECM monitors
whether the voltage is unusually high during various driving condi-
tions such as fuel cut.
MALFUNCTION B
To judge the malfunctions of heated oxygen sensor 2, ECM monitors
whether the minimum voltage of sensor is sufficiently low during var-
ious driving conditions such as fuel cut.
SEF327R
PBIB1848E
PBIB2376E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0138Heated oxygen sensor 2
(bank 1) circuit high volt-
ageA)An excessively high voltage from the sen-
sor is sent to ECM. Harness or connectors
(The sensor circuit is open or shorted)
 Heated oxygen sensor 2
B)The minimum voltage from the sensor is
not reached to the specified voltage. Harness or connectors
(The sensor circuit is open or shorted)
 Heated oxygen sensor 2
 Fuel pressure
 Fuel injector

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

EC-226
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0420, P0430 THREE WAY CATALYST FUNCTION
P0420, P0430 THREE WAY CATALYST FUNCTION
DTC LogicINFOID:0000000003856631
DTC DETECTION LOGIC
The ECM monitors the switching frequency ratio of air fuel ratio (A/F)
sensor 1 and heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2
switching frequency will increase.
When the frequency ratio of A/F sensor 1 and heated oxygen sensor
2 approaches a specified limit value, the three way catalyst (mani-
fold) malfunction is diagnosed.
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 7.
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:
Do not hold engine speed for more than the specified minutes below.
>> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-I
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. Check that “COOLAN TEMP/S” indicates more than 70°C (158°F).
If not, warm up engine and go to next step when “COOLAN TEMP/S” indication reaches to 70°C (158°F).
7. Open engine hood.
8. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUPPORT” mode with CONSULT-III.
9. Rev engine between 2,000 and 3,000 rpm and hold it for 3 consecutive minutes then release the acceler-
ator pedal completely.
10. Check the indication of “CATALYST”.
Which is displayed on CONSULT-III screen?
PBIB2055E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420Catalyst system efficien-
cy below threshold
(bank 1) Three way catalyst (manifold) does not oper-
ate properly.
 Three way catalyst (manifold) does not have
enough oxygen storage capacity. Three way catalyst (manifold)
 Exhaust tube
 Intake air leaks
 Fuel injector
 Fuel injector leaks
 Spark plug
 Improper ignition timing P0430Catalyst system efficien-
cy below threshold
(bank 2)