Condition NISSAN TEANA 2008 Service Manual

ASCD INDICATOR
EC-323
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
ASCD INDICATOR
DescriptionINFOID:0000000003856824
ASCD indicator lamp illuminates to indicate ASCD operation status. Lamp has two indicators, CRUISE and
SET, and is integrated in combination meter.
CRUISE lamp illuminates when MAIN switch on ASCD steering switch is turned ON to indicated that ASCD
system is ready for operation.
SET lamp illuminates when the following conditions are met.
 CRUISE lamp is illuminated.
 SET/COAST switch on ASCD steering switch is turned ON while vehicle speed is within the range of the
ASCD setting.
SET lamp remains lit during ASCD control.
Refer to EC-51, "
System Diagram" for the ASCD function.
Component Function CheckINFOID:0000000003856825
1.CHECK ASCD INDICATOR FUNCTION
Check ASCD indicator under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-323, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856826
1.CHECK DTC
Check that DTC U1000 or U1001 is not displayed.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform trouble diagnosis for DTC U1000, U1001. Refer to EC-135, "
Diagnosis Procedure".
2.CHECK COMBINATION METER FUNCTION
Refer to MWI-33, "
CONSULT-III Function (METER/M&A)".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace malfunctioning part.
3.CHECK INTERMITTENT INCIDENT
Refer to GI-35, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Repair or replace malfunctioning part.
ASCD INDICATOR CONDITION SPECIFICATION
CRUISE LAMP  Ignition switch: ON MAIN switch: Pressed at the
1st time →
at the 2nd timeON → OFF
SET LAMP MAIN switch: ON
 When vehicle speed is be-
tween 40 km/h (25 MPH) and
144 km/h (89 MPH) ASCD: Operating ON
 ASCD: Not operating OFF

EC-324
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN
COOLING FAN
DescriptionINFOID:0000000003856827
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
COOLING FAN MOTOR
The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following.
The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under
the middle speed condition.
Refer to EC-60, "
System Diagram".
Component Function CheckINFOID:0000000003856828
1.CHECK COOLING FAN FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.
3. Check that cooling fan speed varies according to the percent.
Without CONSULT-III
1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PCS-11, "
Diagnosis
Description".
2. Check that cooling fan operates.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-324, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856829
1.CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect cooling fan relays-2, -3.
3. Turn ignition switch ON.
4. Check the voltage between cooling fan relays-2, -3 harness connectors and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
Cooling fan speedCooling fan motor terminals
(+) (−)
Middle (MID)1 3 and 4
2 3 and 4
1 and 2 3
1 and 2 4
High (HI) 1 and 2 3 and 4
Cooling fan relay
Ground Voltage
Connector Terminal
E57
(cooling fan relay-2)2
Ground Battery voltage 5
E59
(cooling fan relay-3)2
5

EC-328
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN
Check that cooling fan speed of condition B is higher than that of A.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan motor.
Component Inspection (Cooling Fan Relay)INFOID:0000000003856831
1.CHECK COOLING FAN RELAY
1. Disconnect cooling fan relays -2, -3 harness connectors.
2. Check continuity between cooling fan relay -2, -3 terminals
under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan relay.
ConditionTe r m i n a l s
(+) (−)
Cooling fan motorA1 3 and 4
2 3 and 4
1 and 2 3
1 and 2 4
B 1, 2 3, 4
Terminals Conditions Continuity
3 and 5
6 and 712 V direct current supply between terminals 1 and 2 Existed
No current supply Not existed
SEF745U

ELECTRICAL LOAD SIGNAL
EC-329
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
ELECTRICAL LOAD SIGNAL
DescriptionINFOID:0000000003856832
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred
through the CAN communication line from BCM to ECM via IPDM E/R.
Component Function CheckINFOID:0000000003856833
1.CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1. Turn ignition switch ON.
2. Connect CONSULT-III and select “DATA MONITOR” mode.
3. Select “LOAD SIGNAL” and check indication under the following conditions.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to EC-329, "
Diagnosis Procedure".
2.CHECK LIGHTING SWITCH FUNCTION
Check “LOAD SIGNAL” indication under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Go to EC-329, "
Diagnosis Procedure".
3.CHECK HEATER FAN CONTROL SWITCH FUNCTION
Select “HEATER FAN SW” and check indication under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-329, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856834
1.INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to EC-329, "
Compo-
nent Function Check".
Which circuit is related to the incident?
Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.
2.CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to DEF-3, "
Work Flow".
Monitor item Condition Indication
LOAD SIGNAL Rear window defogger switchON ON
OFF OFF
Monitor item Condition Indication
LOAD SIGNAL Lighting switchON at 2nd position ON
OFF OFF
Monitor item Condition Indication
HEATER FAN SW Heater fan control switchON ON
OFF OFF

ELECTRONIC CONTROLLED ENGINE MOUNT
EC-331
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
ELECTRONIC CONTROLLED ENGINE MOUNT
DescriptionINFOID:0000000003856835
The electronic controlled engine mount control solenoid valve controls the intake manifold vacuum signal for
electronic controlled engine mount. The electronic controlled engine mount control solenoid valve is moved by
ON/OFF signal from the ECM. When the solenoid is OFF, the vacuum signal from the intake manifold is cut.
When the solenoid is ON, the intake manifold vacuum signal is sent to the electronic controlled engine mount.
Component Function CheckINFOID:0000000003856836
1.CHECK OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Selector level position is D while depressing the brake pedal and parking brake pedal.
3. Disconnect electronic controlled engine mount control solenoid valve harness connector.
4. Check that body vibration increases compared to the condition of step 2 above (with vehicle stopped).
Is the inspection result normal?
YES >> INSPECTION END
NO >>EC-331, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856837
1.CHECK VACUUM SOURCE
1. Turn ignition switch OFF.
2. Reconnect electronic controlled engine mount control solenoid valve harness connector.
3. Disconnect vacuum hose connected to electronic controlled engine mount.
4. Start engine and let it idle.
5. Check vacuum hose for vacuum existence.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 2.
2.CHECK VACUUM HOSES AND VACUUM GALLERY
1. Turn ignition switch OFF.
2. Check vacuum hoses and vacuum gallery for clogging, cracks or improper connection. Refer to EC-68,
"System Diagram".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace vacuum hoses and vacuum gallery.
3.CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE POWER SUPPLY
CIRCUIT
1. Disconnect electronic controlled engine mount control solenoid valve harness connector.
2. Turn ignition switch ON.
3. Check the voltage between front electronic controlled engine mount harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.DETECT MALFUNCTIONING PARTVacuum should exist.
Electronic controlled engine mount
control solenoid valve
Ground Voltage
Connector Terminal
F11 1 Ground Battery voltage

ELECTRONIC CONTROLLED ENGINE MOUNT
EC-333
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
5. Select “ENGINE MOUNTING” in “ACTIVE TEST” mode with CONSULT-III.
6. Check air passage continuity and operation delay time under the
following conditions.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect electronic controlled engine mount control solenoid
valve harness connector.
3. Disconnect vacuum hoses connected to electronic controlled engine mount control solenoid valve.
4. Check air passage continuity and operation delay time under the
following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace electronic controlled engine mount control sole-
noid valve.
Condition
(ENGINE MOUNTING)Air passage continuity
between (A) and (B)Air passage continuity
between (A) and (C)
TRVL Existed Not existed
IDLE Not existed Existed
ConditionAir passage continuity
between (A) and (B)Air passage continuity
between (A) and (C)
12 V direct current supply be-
tween terminals 1 and 2Existed Not existed
No supply Not existed Existed
JMBIA0180ZZ
PBIB2532E

FUEL PUMP
EC-337
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
FUEL PUMP
DescriptionINFOID:0000000003856843
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
start ability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.
Component Function CheckINFOID:0000000003856844
1.CHECK FUEL PUMP FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
Is the inspection result normal?
YES >> INSPECTION END
NO >>EC-337, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856845
1.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.
Sensor Input signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump controlFuel pump relay
↓
Fuel pump
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stopped Stops in 1.5 seconds.
Except as shown aboveSto ps .
: Vehicle front (Illustration shows
the view with intake air duct re-
moved)
Fuel pressure pulsation should be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.
JMBIA1391ZZ
ECM
Ground Voltage
Connector Terminal
F7 14 Ground Battery voltage

POSITIVE CRANKCASE VENTILATION
EC-347
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
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]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
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