2014 NISSAN TEANA width

EC-560
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
Ignition Coil (With Power Transistor)
INFOID:0000000009462501
The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns ON and OFF the ignition
coil primary circuit. This ON/OFF operation induces the proper high
voltage in the coil secondary circuit.
Intake Valve Timing Control Solenoid ValveINFOID:0000000009462502
Intake valve timing control solenoid valve is activated by ON/OFF
pulse duty (ratio) signals from the ECM.
The intake valve timing control solenoid valve changes the oil
amount and direction of flow through intake valve timing control unit
or stops oil flow.
The longer pulse width advances valve angle.
The shorter pulse width retards valve angle.
When ON and OFF pulse widths become equal, the solenoid valve
stops oil pressure flow to fix the intake valve angle at the control
position.
Knock SensorINFOID:0000000009462503
The knock sensor is attached to t he cylinder block. It senses engine
knocking using a piezoelectric element. A knocking vibration from
the cylinder block is sensed as vibrational pressure. This pressure is
converted into a voltage signal and sent to the ECM.
Malfunction Indicator lamp (MIL)INFOID:0000000009462504
Malfunction Indicator lamp (MIL) is located on the combination
meter.
MIL will illuminate when the ignition switch is turned ON without the
engine running. This is a bulb check.
When the engine is started, MIL should turn OFF. If the MIL remains
illuminated, the on board diagnosti c system has detected an engine
system malfunction.
For details, refer to EC-590, "Diagnosis Description"
.
Mass Air Flow Sensor (With In take Air Temperature Sensor)INFOID:0000000009462505
MASS AIR FLOW SENSOR
JPBIA4613ZZ
PBIB1842E
JSBIA0284ZZ
JSBIA1315ZZ
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EC-570
< SYSTEM DESCRIPTION >[VQ35DE]
SYSTEM
MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)
The mixture ratio feedback system prov
ides the best air-fuel mixture ratio for drive ability and emission control.
The three way catalyst (manifold) can better reduce CO , HC and NOx emissions. This system uses A/F sen-
sor 1 in the exhaust manifold to monitor whether the engine operation is rich or lean. The ECM adjusts the
injection pulse width according to the sensor voltage signal. For more information about A/F sensor 1, refer to
EC-552, "Air Fuel Ratio (A/F) Sensor 1"
. This maintains the mixture ratio within the range of stoichiometric
(ideal air-fuel mixture).
This stage is referred to as the closed loop control condition.
Heated oxygen sensor 2 is located downstream of the th ree way catalyst (manifold). Even if the switching
characteristics of A/F sensor 1 shift, the air-fuel ratio is controlled to stoichiometric by the signal from heated
oxygen sensor 2.
• Open Loop Control
The open loop system condition refers to when the ECM detects any of the following conditions. Feedback
control stops in order to maintain stabilized fuel combustion.
- Deceleration and acceleration
- High-load, high-speed operation
- Malfunction of A/F sensor 1 or its circuit
- Insufficient activation of A/F sensor 1 at low engine coolant temperature
- High engine coolant temperature
- During warm-up
- After shifting from N to D
- When starting the engine
MIXTURE RATIO SELF-LEARNING CONTROL
The mixture ratio feedback control system monitors t he mixture ratio signal transmitted from A/F sensor 1.
This feedback signal is then sent to the ECM. The ECM c ontrols the basic mixture ratio as close to the theoret-
ical mixture ratio as possible. However, the basic mi xture ratio is not necessarily controlled as originally
designed. Both manufacturing differences (i.e., mass ai r flow sensor hot wire) and characteristic changes dur-
ing operation (i.e., fuel injector clogging) directly affect mixture ratio.
Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This is
then computed in terms of “injection pulse duration” to automatically compensate for the difference between
the two ratios.
“Fuel trim” refers to the feedback compensation value co mpared against the basic injection duration. Fuel trim
includes “short-term fuel trim” and “long-term fuel trim”.
“Short-term fuel trim” is the short-term fuel compensati on used to maintain the mixture ratio at its theoretical
value. The signal from A/F sensor 1 indicates whether the mixture ratio is RICH or LEAN compared to the the-
oretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is rich, and an increase in
fuel volume if it is lean.
“Long-term fuel trim” is overall fuel compensation carri ed out over time to compensate for continual deviation
of the “short-term fuel trim” from the central value. Continual deviation will occur due to individual engine differ-
ences, wear over time and changes in the usage environment.
PBIB3020E
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SYSTEMEC-571
< SYSTEM DESCRIPTION > [VQ35DE]
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FUEL INJECTION TIMING
Two types of systems are used.
• Sequential Multiport Fuel Injection System
Fuel is injected into each cylinder during each engine cycle according to the ignition order. This system is
used when the engine is running.
• Simultaneous Multiport Fuel Injection System
Fuel is injected simultaneously into all six cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The six injectors will then receive the signals 2 times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.
FUEL SHUT-OFF
Fuel to each cylinder is cut off during deceleration, operation of the engine at excessively high speeds or oper-
ation of the vehicle at excessively high speeds.
ELECTRIC IGNITION SYSTEM
ELECTRIC IGNITION SYSTEM : System DescriptionINFOID:0000000009462516
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
SEF179U
JSBIA2684GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-572
< SYSTEM DESCRIPTION >[VQ35DE]
SYSTEM
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
Ignition order: 1 - 2 - 3 - 4 - 5 - 6
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-
nal. Computing this information, ignition si gnals are transmitted to the power transistor.
During the following conditions, the ignition timing is re vised by the ECM according to the other data stored in
the ECM.
• At starting
• During warm-up
• At idle
• At low battery voltage
• During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
AIR CONDITIONING CUT CONTROL
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed
*
Ignition timing
control Ignition coil
(with power transistor)
Camshaft position sensor
(PHASE) Piston position
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
Transmission range switch Gear position
Battery Battery voltage
*
Knock sensor Engine knocking
Combination meter Vehicle speed CAN communi-
cation
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DIAGNOSIS SYSTEM (ECM)EC-603
< SYSTEM DESCRIPTION > [VQ35DE]
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×
: Applicable
Monitored item Unit Monitor Item Selec-
tion
Description Remarks
ECU IN-
PUT SIG- NALS MAIN-
SIG-
NALS
ENG SPEED rpm ××Indicates the engine speed comput-
ed from the signal of the crankshaft
position sensor (POS) and camshaft
position sensor (PHASE). • Accuracy becomes poor if engine
speed drops below the idle rpm.
• If the signal is interrupted while the engine is running, an abnor-
mal value may be indicated.
MAS A/F SE-B1 V ××The signal voltage of the mass air
flow sensor is displayed. • When the engine is stopped, a
certain value is indicated.
• When engine is running, specifi- cation range is indicated in
“SPEC”.
B/FUEL SCHDL ms ×דBase fuel schedule” indicates the
fuel injection pulse width pro-
grammed into ECM, prior to any
learned on board correction. • When engine is running, specifi-
cation range is indicated in
“SPEC”.
A/F ALPHA-B1
% The mean value of the air-fuel ratio
feedback correction factor per cycle
is indicated. • When the engine is stopped, a
certain value is indicated.
• This data also includes the data
for the air-fuel ratio learning con-
trol.
• When engine is running, specifi-
cation range is indicated in
“SPEC”.
A/F ALPHA-B2
COOLAN TEMP/S °C or °F ×× The engine coolant temperature (de-
termined by the signal voltage of the
engine coolant temperature sensor)
is displayed. When the engine coolant tempera-
ture sensor is open or short-circuit-
ed, ECM enters fail-safe mode. The
engine coolant temperature deter-
mined by the ECM is displayed.
A/F SEN1 (B1) V××
The A/F signal computed from the
input signal of the air fuel ratio (A/F)
sensor 1 is displayed.
A/F SEN1 (B2)
××
HO2S2 (B1) V××
The signal voltage of the heated ox-
ygen sensor 2 is displayed.
HO2S2 (B2) ××
HO2S2 MNTR(B1)
RICH/LEAN ×
Display of heated oxygen sensor 2
signal:
• RICH: means the amount of oxy-
gen after three way catalyst is rel-
atively small.
• LEAN: means the amount of oxy-
gen after three way catalyst is rel-
atively large. When the engine is stopped, a cer-
tain value is indicated.
HO2S2 MNTR(B2) ×
VHCL SPEED SE km/h or
mph ×× The vehicle speed computed from
the vehicle speed signal sent from
combination meter is displayed.
BATTERY VOLT V The power supply voltage of ECM is
displayed.
ACCEL SEN 1 V The accelerator pedal position sen-
sor signal voltage is displayed. ACCEL SEN 2 signal is converted
by ECM internally. Thus, it differs
from ECM terminal voltage signal.
ACCEL SEN 2
TP SEN 1-B1 V××
The throttle position sensor signal
voltage is displayed. TP SEN 2-B1 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal.
TP SEN 2-B1
××
FUEL T/TMP SE °C or °F The fuel temperature (determined by
the signal voltage of the fuel tank
temperature sensor) is displayed.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-604
< SYSTEM DESCRIPTION >[VQ35DE]
DIAGNOSIS SYSTEM (ECM)
EVAP SYS PRES VThe signal voltage of EVAP control
system pressure sensor is dis-
played.
FUEL LEVEL SE V ×The signal voltage of the fuel level
sensor is displayed.
START SIGNAL On/Off Indicates start signal status [On/Off]
computed by the ECM according to
the signals of engine speed and bat-
tery voltage. After starting the engine, [Off] is dis-
played regardless of the starter sig-
nal.
CLSD THL POS On/Off ××Indicates idle position [On/Off] com-
puted by ECM according to the ac-
celerator pedal position sensor
signal.
AIR COND SIG On/Off ××Indicates [On/Off] condition of the air
conditioner switch as determined by
the air conditioner signal.
PW/ST SIGNAL On/Off ××[On/Off] condition of the power
steering system (determined by the
signal voltage of the power steering
pressure sensor) is indicated.
LOAD SIGNAL On/Off ××Indicates [On/Off] condition from the
electrical load signal.
• On: Rear window defogger switch
is ON and/or lighting switch is in
2nd position.
• Off: Both rear window defogger
switch and lighting switch are
OFF.
IGNITION SW On/Off ××Indicates [On/Off] condition from ig-
nition switch signal.
HEATER FAN SW On/Off ×Indicates [On/Off] condition from the
heater fan switch signal.
BRAKE SW On/Off Indicates [On/Off] condition from the
stop lamp switch signal.
INJ PULSE-B1 msec Indicates the actual fuel injection
pulse width compensated by ECM
according to the input signals. When the engine is stopped, a cer-
tain computed value is indicated.
INJ PULSE-B2
IGN TIMING BTDC ×Indicates the ignition timing comput-
ed by ECM according to the input
signals. When the engine is stopped, a cer-
tain value is indicated.
CAL/LD VALUE % “Calculated load value” indicates the
value of the current air flow divided
by peak air flow.
MASS AIRFLOW g/s Indicates the mass air flow comput-
ed by ECM according to the signal
voltage of the mass air flow sensor.
PURG VOL C/V % • Indicates the EVAP canister purge
volume control solenoid valve
control value computed by the
ECM according to the input sig-
nals.
• The opening becomes larger as the value increases.
Monitored item Unit
Monitor Item Selec-
tion
Description Remarks
ECU IN-
PUT SIG- NALS MAIN-
SIG-
NALS
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

TROUBLE DIAGNOSIS - SPECIFICATION VALUEEC-701
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
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DTC/CIRCUIT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:0000000009462570
The specification (SP) value indicates the tolerance of
the value that is displayed in “SPEC” in “DATA MONI-
TOR” mode of CONSULT during normal operation of the Engine Control System. When the value in “SPEC” in
“DATA MONITOR” mode is within the SP value, the E ngine Control System is confirmed OK. When the value
in “SPEC” in “DATA MONITOR” mode is NOT within t he SP value, the Engine Control System may have one
or more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not illuminate
the MIL.
The SP value will be displayed for the following three items:
• B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc- tion)
• A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
• MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Component Function CheckINFOID:0000000009462571
1.START
Check that all of the following conditions are satisfied.
• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm
2, 14.25 - 15.12 psi)
• Atmospheric temperature: 20 - 30 °C (68 - 86 °F)
• Engine coolant temperature: 75 - 95 °C (167 - 203 °F)
• Transmission: Warmed-up
- After the engine is warmed up to normal operating tem perature, drive vehicle until “FLUID TEMP SE” (CVT
fluid temperature sensor signal) indicates more than 60 °C (140 °F).
• Electrical load: Not applied
- Rear window defogger switch, air conditioner switch li ghting switch are OFF. Steering wheel is straight
ahead.
• Engine speed: Idle
>> GO TO 2.
2.PERFORM “SPEC” OF “DATA MONITOR” MODE
With CONSULT
NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1. Perform basic inspection. Refer to EC-675, "Work Procedure"
.
2. Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2” and “MAS A/F SE-B1” in “SPEC” of “DATA
MONITOR” mode with CONSULT.
3. Check that monitor items are within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Proceed to EC-702, "Diagnosis Procedure"
.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

TIMING CHAINEM-65
< REMOVAL AND INSTALLATION > [QR25DE]
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15. Press stopper tab (A) in the direction shown to push the timing
chain slack guide (B) toward timing chain tensioner (1) for the
balancer unit.
• The slack guide (B) is released by pressing the stopper tab
(A). As a result, the slack guide (B) can be moved.
16. Insert stopper pin (D) into tensioner body hole (C) to secure tim- ing chain slack guide (B).
NOTE:
Use a hard metal pin with a diameter of approximately 1.2 mm
(0.047 in) as a stopper pin.
17. Remove timing chain tensioner (1) for balancer unit.
18. Secure width across flats of the balancer unit LH side shaft using a suitable tool. Loosen the balancer unit sprocket bolt.
19. Remove balancer unit timing chain, balancer unit sprocket and crankshaft sprocket.
20. Loosen bolts in the reverse order shown, and remove balancer unit.
CAUTION:
• Do not disassemble balancer unit.
INSPECTION AFTER REMOVAL
Timing Chain
Check the timing chain for cracks or excessive wear. If a defect is
found, replace the timing chain.
Balancer Unit Bo lt Outer Diameter
PBIC5314E
: Engine front
AWBIA1380ZZ
PBIC0282E
Revision: November 20132014 Altima NAM