check engine NISSAN TEANA 2008 Service Manual

EC-348
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
DescriptionINFOID:0000000003856862
The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.
Component Function CheckINFOID:0000000003856863
1.CHECK REFRIGERANT PRESSURE SENSOR FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-348, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856864
1.CHECK GROUND CONNECTION
1. Turn A/C switch and blower fan switch OFF.
2. Stop engine.
3. Turn ignition switch OFF.
4. Check ground connection E38. Refer to Ground Inspection in GI-37, "
Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between refrigerant pressure sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
PBIB2657E
ECM
Voltage (V)
Connector+–
Te r m i n a l Te r m i n a l
F839
(Refrigerant pressure sensor signal)40
(Sensor ground)1.0 - 4.0
Refrigerant pressure sensor
Ground Voltage (V)
Connector Terminal
E300 1 Ground Approx. 5

VARIABLE INDUCTION AIR SYSTEM
EC-351
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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VARIABLE INDUCTION AIR SYSTEM
DescriptionINFOID:0000000003856865
Power Valves 1 and 2 (VQ35DE engine)
The power valves 1 and 2 are installed in intake manifold collector and used to control the suction passage of
the variable induction air control system. They are set in the fully closed or fully opened position by the power
valve actuators 1 and 2 operated by the vacuum stored in the vacuum tank. The vacuum to power valve actu-
ators is controlled by the VIAS control solenoid valves 1 and 2.
Power Valve (VQ25DE engine)
The power valve is installed in intake manifold collector and used to control the suction passage of the variable
induction air control system. It is set in the fully closed or fully opened position by the power valve actuator
operated by the vacuum stored in the vacuum tank. The vacuum to power valve actuator is controlled by the
VIAS control solenoid valve.
Component Function Check (VQ35DE engine)INFOID:0000000003856866
1.CHECK OVERALL FUNCTION-I
With CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT-III.
3. Turn VIAS control solenoid valve 1 “ON” and “OFF”, and check that power valve actuator 1 rod moves.
Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. When revving engine up to 5,000 rpm quickly.
3. Check that power valve actuator 1 rod moves under the following conditions.
1. Power valve actuator 1 2. Power valve actuator 1 rod 3. Power valve actuator 2
4. Power valve actuator 2 rod
: Vehicle front
1. Power valve actuator 1 2. Power valve actuator 1 rod 3. Power valve actuator 2
4. Power valve actuator 2 rod
: Vehicle front
JMBIA1386ZZ
JMBIA1386ZZ

EC-352
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
VARIABLE INDUCTION AIR SYSTEM
Is the inspection result normal?
YES >> GO TO 2.
NO >>EC-353, "
Diagnosis Procedure (VQ35DE engine)".
2.CHECK OVERALL FUNCTION-II
With CONSULT-III
1. Perform “VIAS S/V-2” in “ACTIVE TEST” mode with CONSULT-III.
2. Turn VIAS control solenoid valve 2 “ON” and “OFF”, and check that power valve actuator 2 rod moves.
Without CONSULT-III
1. When revving engine up to 5,000 rpm quickly.
2. Check that power valve actuator 2 rod moves under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >>EC-353, "
Diagnosis Procedure (VQ35DE engine)".
Condition Operation
Idle Existed
When revving engine up to 5,000 rpm quickly Not existed
1. Power valve actuator 1 2. Power valve actuator 1 rod 3. Power valve actuator 2
4. Power valve actuator 2 rod
: Vehicle front
1. Power valve actuator 1 2. Power valve actuator 1 rod 3. Power valve actuator 2
4. Power valve actuator 2 rod
: Vehicle front
Condition Operation
Idle Existed
When revving engine up to 5,000 rpm quickly Not existed
JMBIA1386ZZ
JMBIA1386ZZ

VARIABLE INDUCTION AIR SYSTEM
EC-353
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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Component Function Check (VQ25DE engine)INFOID:0000000003895854
1.CHECK OVERALL FUNCTION
With CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT-III.
3. Turn VIAS control solenoid valve 1 “ON” and “OFF”, and check
that power valve actuator (1) rod (2) moves.
Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. When revving engine up to 5,000 rpm quickly.
3. Check that power valve actuator (1) rod (2) moves under the fol-
lowing conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >>EC-355, "
Diagnosis Procedure (VQ25DE engine)".
Diagnosis Procedure (VQ35DE engine)INFOID:0000000003856867
1.INSPECTION START
Confirm the malfunctioning system (power valve 1 or power valve 2). Refer to EC-351, "
Component Function
Check (VQ35DE engine)".
Which system is related to the incident?
Power valve 1>>GO TO 2.
Power valve 2>>GO TO 6.
2.CHECK VACUUM EXISTENCE-I
With CONSULT-III
1. Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2. Start engine and let it idle.
3. Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT-III.
4. Turn VIAS control solenoid valve 1 “ON” and “OFF”, and check vacuum existence under the following con-
ditions.
Without CONSULT-III
: Vehicle front
JMBIA1387ZZ
: Vehicle front
Condition Operation
Idle Existed
When revving engine up to 5,000 rpm quickly Not existed
JMBIA1387ZZ
VIAS S/V 1 Vacuum
ON Existed
OFF Not existed

EC-354
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
VARIABLE INDUCTION AIR SYSTEM
1. Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Start engine.
4. When revving engine up to 5,000 rpm quickly.
5. Check vacuum existence under the following conditions.
Is the inspection result normal?
YES >> Repair or replace power valve actuator 1.
NO >> GO TO 3.
3.CHECK VACUUM TANK
1. Stop engine and disconnect vacuum hose connected to intake manifold collector.
2. Start engine and let it idle.
3. Check vacuum existence from intake manifold collector.
Does vacuum existence from the intake manifold collector?
YES >> GO TO 4.
NO >> Replace intake manifold collector.
4.CHECK VACUUM HOSE
1. Stop engine.
2. Check vacuum hose for cracks, clogging, improper connection
or disconnection. Refer to EC-93, "
System Diagram".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair hoses or tubes.
5.CHECK VIAS CONTROL SOLENOID VALVE 1
Refer to EC-286, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace VIAS control solenoid valve 1.
6.CHECK VACUUM EXISTENCE-II
With CONSULT-III
1. Stop engine and disconnect vacuum hose connected to power valve actuator 2.
2. Start engine and let it idle.
3. Perform “VIAS S/V-2” in “ACTIVE TEST” mode with CONSULT-III.
4. Turn VIAS control solenoid valve 2 “ON” and “OFF”, and check vacuum existence under the following con-
ditions.
Without CONSULT-III
1. Stop engine and disconnect vacuum hose connected to power valve actuator 2.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Start engine.
Condition Operation
Idle Existed
When revving engine up to 5,000 rpm quickly Not existed
SEF109L
VIAS S/V 2 Vacuum
ON Existed
OFF Not existed

VARIABLE INDUCTION AIR SYSTEM
EC-355
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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4. When revving engine up to 5,000 rpm quickly.
5. Check vacuum existence under the following conditions.
Is the inspection result normal?
YES >> Repair or replace power valve actuator 2.
NO >> GO TO 7.
7.CHECK VACUUM HOSE
1. Stop engine.
2. Check vacuum hose for cracks, clogging, improper connection
or disconnection. Refer to EC-93, "
System Diagram".
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair hoses or tubes.
8.CHECK VIAS CONTROL SOLENOID VALVE 2
Refer to EC-289, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace VIAS control solenoid valve 2.
9.CHECK INTERMITTENT INCIDENT
Refer to GI-35, "
Intermittent Incident".
>> INSPECTION END
Diagnosis Procedure (VQ25DE engine)INFOID:0000000003896867
1.INSPECTION START
Confirm the malfunctioning system (power valve). Refer to EC-353, "
Component Function Check (VQ25DE
engine)".
Which system is related to the incident?
>> GO TO 2.
2.CHECK VACUUM EXISTENCE
With CONSULT-III
1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Start engine and let it idle.
3. Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT-III.
4. Turn VIAS control solenoid valve “ON” and “OFF”, and check vacuum existence under the following condi-
tions.
Without CONSULT-III
Condition Operation
Idle Existed
When revving engine up to 5,000 rpm quickly Not existed
SEF109L
VIAS S/V Vacuum
ON Existed
OFF Not existed

EC-356
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
VARIABLE INDUCTION AIR SYSTEM
1. Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2. Disconnect VIAS control solenoid valve harness connector.
3. Start engine.
4. When revving engine up to 5,000 rpm quickly.
5. Check vacuum existence under the following conditions.
Is the inspection result normal?
YES >> Repair or replace power valve actuator.
NO >> GO TO 3.
3.CHECK VACUUM TANK
1. Stop engine and disconnect vacuum hose connected to intake manifold collector.
2. Start engine and let it idle.
3. Check vacuum existence from intake manifold collector.
Does vacuum existence from the intake manifold collector?
YES >> GO TO 4.
NO >> Replace intake manifold collector.
4.CHECK VACUUM HOSE
1. Stop engine.
2. Check vacuum hose for cracks, clogging, improper connection
or disconnection. Refer to EC-93, "
System Diagram".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair hoses or tubes.
5.CHECK VIAS CONTROL SOLENOID VALVE
Refer to EC-286, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace VIAS control solenoid valve.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-35, "
Intermittent Incident".
>> INSPECTION END
Condition Operation
Idle Existed
When revving engine up to 5,000 rpm quickly Not existed
SEF109L

EC-394
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
 Sea level
 Flat road
 Ambient air temperature: 20 - 30°C (68 - 86°F)
 Diagnosis is performed as quickly as possible under normal conditions.
Under different conditions [For example: ambient air temperature other than 20 - 30°C (68 - 86°F)], diagno-
sis may also be performed.
Pattern 1:
The engine is started at the engine coolant temperature of −10 to 35°C (14 to 95°F)
(where the voltage between the ECM terminal 46 and ground is 3.0 - 4.3 V).
The engine must be operated at idle speed until the engine coolant temperature is greater than 70°C
(158°F) (where the voltage between the ECM terminal 46 and ground is lower than 1.4 V).
The engine is started at the fuel tank temperature of warmer than 0°C (32°F) (where the voltage
between the ECM terminal 95 and ground is less than 4.1 V).
Pattern 2:
 When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted.
In this case, the time required for diagnosis may be extended.
Pattern 3:
 Operate vehicle following the driving pattern shown in the figure.
 Release the accelerator pedal during deceleration of vehicle speed
from 90 km/h (56 MPH) to 0 km/h (0 MPH).
Pattern 4:
 The accelerator pedal must be held very steady during steady-
state driving.
 If the accelerator pedal is moved, the test must be conducted
again.
*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56
MPH), then release the accelerator pedal and keep it released for
more than 10 seconds. Depress the accelerator pedal until vehicle
speed is 90 km/h (56 MPH) again.
*2: Checking the vehicle speed with GST is advised.
Suggested Transmission Gear Position.
Selector lever position is D.
Test Value and Test LimitINFOID:0000000003856874
The following is the information specified in Service $06 of ISO 15031-5.
The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while
being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the
maximum or minimum value and is compared with the test value being monitored.
These data (test value and test limit) are specified by On Board Monitor ID (OBDMID), Test ID (TID), Unit and
Scaling ID and can be displayed on the GST screen.
The items of the test value and test limit will be displayed with GST screen which items are provided by the
ECM. (eg., if bank 2 is not applied on this vehicle, only the items of bank 1 is displayed)
PBIB2244E

PRECAUTIONS
EC-405
< PRECAUTION >[VQ25DE, VQ35DE]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003960684
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIRBAG” and
“SEAT BELT” of this Service Manual.
WARNING:
 To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
 Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
Precautions For Xenon Headlamp ServiceINFOID:0000000003856878
WARNING:
Comply with the following warnings to prevent any serious accident.
 Disconnect the battery cable (negative terminal) or the power supply fuse before installing, remov-
ing, or touching the xenon headlamp (bulb included). The xenon headlamp contains high-voltage
generated parts.
 Never work with wet hands.
 Check the xenon headlamp ON-OFF status after assembling it to the vehicle. Never turn the xenon
headlamp ON in other conditions. Connect the power supply to the vehicle-side connector.
(Turning it ON outside the lamp case may cause fire or visual impairments.)
 Never touch the bulb glass immediately after turning it OFF. It is extremely hot.
CAUTION:
Comply with the following cautions to prevent any error and malfunction.
 Install the xenon bulb securely. (Insufficient bulb socket installation may melt the bulb, the connec-
tor, the housing, etc. by high-voltage leakage or corona discharge.)
 Never perform HID circuit inspection with a tester.
 Never touch the xenon bulb glass with hands. Never put oil and grease on it.
 Dispose of the used xenon bulb after packing it in thick vinyl without breaking it.
 Never wipe out dirt and contamination with organic solvent (thinner, gasoline, etc.).
Precaution for Procedure without Cowl Top CoverINFOID:0000000003856879
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
On Board Diagnostic (OBD) System of Engine and CVTINFOID:0000000003856880
The ECM has an on board diagnostic system. It will illuminate the malfunction indicator MI to warn the driver of
a malfunction causing emission deterioration.
PIIB3706J

PRECAUTIONS
EC-407
< PRECAUTION >[VQ25DE, VQ35DE]
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When connecting or disconnecting pin connectors into or
from ECM, never damage pin terminals (bends or break).
Check that there are not any bends or breaks on ECM pin ter-
minal, when connecting pin connectors.
Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge) volt-
age to develop in coil and condenser, thus resulting in dam-
age to ICs.
Keep engine control system harness at least 10 cm (4 in) away
from adjacent harness, to prevent engine control system mal-
functions due to receiving external noise, degraded operation
of ICs, etc.
Keep engine control system parts and harness dry.
Before replacing ECM, perform ECM Terminals and Reference
Value inspection and check ECM functions properly. Refer to
EC-357, "
Reference Value".
Handle mass air flow sensor carefully to avoid damage.
Never clean mass air flow sensor with any type of detergent.
Never disassemble electric throttle control actuator.
Even a slight leak in the air intake system can cause serious
incidents.
Never shock or jar the camshaft position sensor (PHASE),
crankshaft position sensor (POS).
After performing each TROUBLE DIAGNOSIS, perform DTC
Confirmation Procedure or Component Function Check.
The DTC should not be displayed in the DTC Confirmation
Procedure if the repair is completed. The Component Func-
tion Check should be a good result if the repair is completed.
PBIB0090E
MEF040D
SAT652J