diagram NISSAN TEANA 2008 Service Manual

EC-76
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
EVAPORATIVE EMISSION SYSTEM
EVAPORATIVE EMISSION SYSTEM
System DiagramINFOID:0000000003949755
System DescriptionINFOID:0000000003949756
INPUT/OUTPUT SIGNAL CHART
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.
JMBIA1524GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
1
Piston position
EVAP canister
purge flow controlEVAP canister purge vol-
ume control solenoid valve Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Air fuel ratio (A/F) sensor 1Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery
Battery voltage*
1
ABS actuator and electric unit (control unit)
Vehicle speed*2

EC-86
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
INTAKE VALVE TIMING CONTROL
INTAKE VALVE TIMING CONTROL
System DiagramINFOID:0000000003856494
System DescriptionINFOID:0000000003856495
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
SYSTEM DESCRIPTION
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing (IVT) control sole-
noid valve depending on driving status. This makes it possible to control the shut/open timing of the intake
valve to increase engine torque in low/mid speed range and output in high-speed range.
JMBIA1491GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed and piston position
Intake valve
timing controlIntake valve timing control
solenoid valve Camshaft position sensor (PHASE)
Engine oil temperature sensor Engine oil temperature
Engine coolant temperature sensor Engine coolant temperature
ABS actuator and electric unit (control unit) Vehicle speed*
JMBIA0060GB

VARIABLE INDUCTION AIR SYSTEM
EC-93
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
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VARIABLE INDUCTION AIR SYSTEM
System DiagramINFOID:0000000003856498
System DescriptionINFOID:0000000003856499
INPUT/OUTPUT SIGNAL CHART
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
JMBIA1523GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
VIAS controlVIAS control solenoid valve 1
VIAS control solenoid valve 2 Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery Battery voltage*
JMBIA0181GB

EC-270
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P1564 ASCD STEERING SWITCH
P1564 ASCD STEERING SWITCH
DescriptionINFOID:0000000003856749
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to EC-51, "
System Diagram" for the ASCD function.
DTC LogicINFOID:0000000003856750
DTC DETECTION LOGIC
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to
EC-240, "
DTC Logic".
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.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 10 seconds.
2. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
3. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
4. Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 sec-
onds.
5. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
6. Check DTC.
Is DTC detected?
YES >> Go to EC-270, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003856751
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. 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 ASCD STEERING SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch ON.
2. Select “MAIN SW”, “CANCEL SW”, “RESUME/ACC SW” and “SET SW” in “DATA MONITOR” mode with
CONSULT-III.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P1564 ASCD steering switch An excessively high voltage signal from the
ASCD steering switch is sent to ECM.
 ECM detects that input signal from the
ASCD steering switch is out of the specified
range.
 ECM detects that the ASCD steering switch
is stuck ON. Harness or connectors
(The switch circuit is open or shorted.)
ASCD steering switch
ECM

P1572 ASCD BRAKE SWITCH
EC-273
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P1572 ASCD BRAKE SWITCH
DescriptionINFOID:0000000003856753
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by two kinds of input (ON/OFF signal).
Refer to EC-51, "
System Diagram" for the ASCD function.
DTC LogicINFOID:0000000003856754
DTC DETECTION LOGIC
NOTE:
If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-240, "
DTC Logic".
This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not
stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when ignition switch is turned OFF. And even when malfunction A is detected
in two consecutive trips, DTC is not stored in ECM memory.
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.
NOTE:
Procedure for malfunction B is not described here. It takes extremely long time to complete procedure for mal-
function B. By performing procedure for malfunction A, the incident that causes malfunction B can be
detected.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Start engine (VDC switch OFF).
2. Select “DATA MONITOR” mode with CONSULT-III.
3. Press MAIN switch and check that CRUISE lamp illuminates.
4. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.
If a road test is expected to be easier, it is unnecessary to lift the vehicle.
5. Check 1st trip DTC.
With GST
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P1572 ASCD brake switchA)When the vehicle speed is above 30 km/h
(19 MPH), ON signals from the stop lamp
switch and the ASCD brake switch are sent
to the ECM at the same time. Harness or connectors
(The stop lamp switch circuit is shorted.)
 Harness or connectors
(The ASCD brake switch circuit is shorted.)
 Stop lamp switch
 ASCD brake switch
 Incorrect stop lamp switch installation
 Incorrect ASCD brake switch installation
ECM B)ASCD brake switch signal is not sent to
ECM for extremely long time while the ve-
hicle is being driver.
VHCL SPEED SE More than 30 km/h (19 mph)
Selector lever Suitable position

EC-278
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P1574 ASCD VEHICLE SPEED SENSOR
P1574 ASCD VEHICLE SPEED SENSOR
DescriptionINFOID:0000000003856758
The ECM receives two vehicle speed signals via CAN communication line. One is sent from combination
meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD con-
trol. Refer to EC-51, "
System Diagram" for ASCD functions.
DTC LogicINFOID:0000000003856759
DTC DETECTION LOGIC
NOTE:
If DTC P1574 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-135, "
DTC Logic".
If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer
to EC-234, "
DTC Logic".
If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-240, "
DTC Logic".
If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
to EC-242, "
DTC Logic".
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.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine (VDC switch OFF).
2. Drive the vehicle at more than 40 km/h (25 MPH).
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.
If a road test is expected to be easier, it is unnecessary to lift the vehicle.
3. Check DTC.
Is DTC detected?
YES >> Go to EC-278, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003856760
1.CHECK DTC WITH TCM
Check DTC with TCM. Refer to TM-35, "
Diagnosis Description".
Is the inspection result normal?
YES >> GO TO 2.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P1574ASCD vehicle speed
sensorThe difference between the two vehicle speed
signals is out of the specified range. Harness or connectors
(The CAN communication line is open or
shorted.)
 Combination meter
 ABS actuator and electric unit (control unit)
 Wheel sensor
TCM
ECM

ASCD BRAKE SWITCH
EC-321
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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ASCD BRAKE SWITCH
DescriptionINFOID:0000000003858142
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by two kinds of input (ON/OFF signal).
Refer to EC-51, "
System Diagram" for the ASCD function.
Component Function CheckINFOID:0000000003856821
1.CHECK ASCD BRAKE SWITCH FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-321, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856822
1.CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ASCD brake switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
 Fuse block (J/B) connector E103
 10A fuse (No.3)
 Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit, short to ground or short to power in harness or connectors.
Monitor item Condition Indication
BRAKE SW1 Brake pedalSlightly depressed OFF
Fully released ON
ECM
Ground Condition Voltage
Connector Terminal
E1611 0
(ASCD brake
switch signal)Ground Brake pedalSlightly depressed Approx. 0 V
Fully released Battery voltage
ASCD brake switch
Ground Voltage
Connector Terminal
E49 1 Ground Battery voltage

ASCD INDICATOR
EC-323
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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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

ELECTRONIC CONTROLLED ENGINE MOUNT
EC-331
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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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