engine NISSAN TEANA 2008 Service Manual

POSITIVE CRANKCASE VENTILATION
EC-347
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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POSITIVE CRANKCASE VENTILATION
DescriptionINFOID:0000000003856860
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake
manifold.
During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the PCV
valve.
Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air.
The ventilating air is drawn from the air inlet tubes into the crankcase. In this process the air passes through
the hose connecting air inlet tubes to rocker cover.
Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve.
The flow goes through the hose connection in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.
Component InspectionINFOID:0000000003856861
1.CHECK PCV VALVE
With engine running at idle, remove PCV valve from rocker cover. A
properly working valve makes a hissing noise as air passes through
it. A strong vacuum should be felt immediately when a finger is
placed over valve inlet.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace PCV valve.
SEC921C
PBIB1588E
PBIB1589E

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

ECM
EC-357
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
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ECU DIAGNOSIS
ECM
Reference ValueINFOID:0000000003856868
VALUES ON THE DIAGNOSIS TOOL
Remarks:
l Specification data are reference values.
l Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
I.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show
the specification data in spite of the ignition timing not being adjusted to the specification data. This IGN TIM-
ING monitors the data calculated by the ECM according to the signals input from the camshaft position sensor
and other ignition timing related sensors.
Monitor Item Condition Values/Status
ENG SPEED Run engine and compare CONSULT-III value with the tachometer indication.Almost the same speed as
the tachometer indication.
MAS A/F SE-B1 See EC-124, "
Description".
B/FUEL SCHDL See EC-124, "
Description".
A/F ALPHA-B1 See EC-124, "
Description".
A/F ALPHA-B2 See EC-124, "
Description".
COOLAN TEMP/S  Engine: After warming up More than 70°C (158°F)
A/F SEN1 (B1)  Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
A/F SEN1 (B2)  Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
HO2S2 (B1) Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load0 - 0.3 V ←→ Approx. 0.6 -
1.0 V
HO2S2 (B2) Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load0 - 0.3 V ←→ Approx. 0.6 -
1.0 V
HO2S2 MNTR (B1) Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no loadLEAN ←→ RICH
HO2S2 MNTR (B2) Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no loadLEAN ←→ RICH
VHCL SPEED SE Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.Almost the same speed as
speedometer indication
BATTERY VOLT  Ignition switch: ON (Engine stopped) 11 - 14 V
ACCEL SEN 1 Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.5 - 1.0 V
Accelerator pedal: Fully depressed 4.2 - 4.8 V
ACCEL SEN 2*
1 Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.5 - 1.0 V
Accelerator pedal: Fully depressed 4.2 - 4.8 V

EC-358
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
TP SEN 1-B1 Ignition switch: ON
(Engine stopped)
 Selector lever: DAccelerator pedal: Fully released More than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
TP SEN 2-B1*
1 Ignition switch: ON
(Engine stopped)
 Selector lever: DAccelerator pedal: Fully released More than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
INT/A TEMP SE  Ignition switch: ONIndicates intake air tempera-
ture
START SIGNAL  Ignition switch: ON → START → ON OFF → ON → OFF
CLSD THL POS Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
AIR COND SIG Engine: After warming up, idle the
engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
P/N POSI SW  Ignition switch: ONSelector lever: P or N ON
Selector lever: Except above OFF
PW/ST SIGNAL Engine: After warming up, idle the
engineSteering wheel: Not being turned OFF
Steering wheel: Being turned ON
LOAD SIGNAL  Ignition switch: ONRear window defogger switch: ON
and/or
Lighting switch: 2nd positionON
Rear window defogger switch and lighting
switch: OFFOFF
IGNITION SW  Ignition switch: ON → OFF → ON ON → OFF → ON
HEATER FAN SW Engine: After warming up, idle the
engineHeater fan switch: ON ON
Heater fan switch: OFF OFF
BRAKE SW  Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1 Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
INJ PULSE-B2 Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 7° - 17° BTDC
2,000 rpm 25° - 45° BTDC
CAL/LD VALUE Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 5% - 35%
2,500 rpm 5% - 35%
MASS AIRFLOW Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 2.0 - 6.0 g·m/s
2,500 rpm 7.0 - 20.0 g·m/s
PURG VOL C/V Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle
(Accelerator pedal: Not depressed even
slightly, after engine starting.)0%
2,000 rpm — Monitor Item Condition Values/Status