2014 NISSAN TEANA ignition

PRECAUTIONSEC-543
< PRECAUTION > [VQ35DE]
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General PrecautionsINFOID:0000000009462477
•
Always use a 12 volt battery as power source.
• Never attempt to disconnect ba ttery cables while engine is
running.
• Before connecting or disc onnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative bat-
tery cable. Failure to do so may damage the ECM because
battery voltage is applied to ECM even if ignition switch is
turned OFF.
• Before removing parts, turn ig nition switch OFF and then dis-
connect battery ground cable.
• Never disassemble ECM.
• If a battery cable is disconnected, the memory will return to the ECM value.
The ECM will now start to self-control at its initia l value. Thus, engine operation can vary slightly in
this case. However, this is not an indication of a malfunction. Never replace parts because of a slight
variation.
• If the battery is disconnected, the following emi ssion-related diagnostic information will be lost
within 24 hours.
- Diagnostic trouble codes
- 1st trip diagnostic trouble codes
- Freeze frame data
- 1st trip freeze frame data
- System readiness test (SRT) codes
- Test values
• When connecting ECM harness connector, fasten (B) it
securely with a lever (1) as far as it will go as shown in the fig-
ure.
- ECM (2)
- Loosen (A)
• When connecting or disconnect ing 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 connect ing pin connectors.
• Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge) volt-
age to develop in coil and cond enser, 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 externa l noise, degraded operation
of ICs, etc.
• Keep engine control system parts and harness dry.
SEF289H
PBIB2947E
PBIB0090E
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COMPONENT PARTSEC-549
< SYSTEM DESCRIPTION > [VQ35DE]
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ENGINE
11. Mass air flow sensor (with intake air temperature sensor)
EC-560, "Mass Air Flow Sensor (With Intake Air Temperature Sen-sor)"
12. Electric throttle control actuator
EC-555, "Electric Throttle Control Actuator"
13. Power valve actuator 2 EC-561, "Power Valve Actuator 1 and 2"
14. EVAP canister purge volume control solenoid valveEC-557, "EVAP Canister Purge Volume Control Solenoid Valve"
15. VIAS control solenoid valve 2EC-562, "VIAS Control Solenoid Valve 1 and 2"
16. VIAS control solenoid valve 1EC-562, "VIAS Control Solenoid Valve 1 and 2"
No. Component Function
A. Engine rear upper-left B. Engine top center C. Engine front lower-right
:Vehicle front
No. Component Function
1. Camshaft position sensor (PHASE)
(bank 1) EC-554, "Camshaft Position Sensor (PHASE)"
2.Ignition coil (with power transistor)
(bank 1) EC-560, "Ignition Coil
(With Power Transistor)"
3. PCV valve EC-563, "Positive Crankcase Ventilation (PCV)"
4. Intake valve timing control solenoid valve (bank 1)EC-560, "Intake Valve Timing Control Solenoid Valve"
5. Engine oil pressure sensorEC-557, "Engine Oil Pressure Sensor"
6. Intake valve timing control solenoid valve (bank 2)EC-560, "Intake Valve Timing Control Solenoid Valve"
7. Crankshaft position sensor (POS)EC-554, "Crankshaft Position Sensor (POS)"
JPBIA5982ZZ
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EC-550
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
EXHAUST
BODY
8.Ignition coil (with power transistor)
(bank 2) EC-560, "Ignition Coil (With Power Transistor)"
9.Camshaft position sensor (PHASE)
(bank 2) EC-554, "Camshaft Posi
tion Sensor (PHASE)"
10. Engine coolant temperature sensor EC-556, "Engine Coolant Temperature Sensor"
11. Fuel injector (bank 1)EC-558, "Fuel Injector"
12. Knock sensor (bank 1)EC-560, "Knock Sensor"
13. Knock sensor (bank 2)EC-560, "Knock Sensor"
14. Fuel injector (bank 2)EC-558, "Fuel Injector"
15. Engine oil temperature sensorEC-557, "Engine Oil Temperature Sensor"
No. Component Function
JPBIA4687ZZ
No. Component Function
1. Air fuel ratio (A/F ) sensor 1 (bank 2) EC-552, "Air Fuel Ratio (A/F) Sensor 1"
2. Heated oxygen sensor 2 (bank 2) EC-559, "Heated Oxygen Sensor 2"
3. Heated oxygen sensor 2 (bank 1)EC-559, "Heated Oxygen Sensor 2"
4. Air fuel ratio (A/F) sensor 1 (bank 1) EC-552, "Air Fuel Ratio (A/F) Sensor 1"
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

COMPONENT PARTSEC-555
< SYSTEM DESCRIPTION > [VQ35DE]
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ECM receives the signals as shown in the figure.
ECMINFOID:0000000009462488
• ECM (Engine Control Module) controls the engine.
• ECM consists of a microcomputer and connectors for signal input and output and for power supply.
• Battery voltage is supplied to the ECM even when the ignition
switch is turned OFF for the ECM memory function of the DTC
memory, the air-fuel ratio feedback compensation value memory,
the idle air volume learning value memory, etc.
Electric Throttle Control ActuatorINFOID:0000000009462489
OUTLINE
Electric throttle control actuator cons ists of throttle body, throttle valve, throttle control motor and throttle posi-
tion sensor.
THROTTLE CONTROL MOTOR
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.
THROTTLE POSITION SENSOR
The throttle position sensor responds to the throttle valve movement.
JMBIA0001GB
PBIA9222J
JSBIA0270GB
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EC-558
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
EVAP Canister Vent Control Valve
INFOID:0000000009462496
The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows “EVAP
Control System” diagnosis.
EVAP Control System Pressure SensorINFOID:0000000009462497
The EVAP control system pressure s ensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as pres-
sure increases.
Fuel InjectorINFOID:0000000009462498
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
Fuel Level Sensor Unit and Fuel Pump (With Fuel Tank Temperature Sensor)
INFOID:0000000009462499
FUEL PUMP
The ECM activates the fuel pump for 1 second 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 igni-
tion 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 sends the control signal
to the fuel pump control module, which in turn controls the fuel
pump.
JSBIA1337GB
PBIB3370E
PBIA9664J
JSBIA1282ZZ
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COMPONENT PARTSEC-559
< SYSTEM DESCRIPTION > [VQ35DE]
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FUEL LEVEL SENSOR
The fuel level sensor is mounted in the fuel level sensor unit.
The sensor detects a fuel level in the fuel tank and tr ansmits a signal to the combination meter. The combina-
tion meter sends the fuel level sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the ot her is variable resistor. Fuel level sensor output volt-
age changes depending on the movement of the fuel mechanical float.
FUEL TANK TEMPERATURE SENSOR
The fuel tank temperature sensor is used to detect the fuel tempera-
ture inside the fuel tank. The sensor modifies a voltage signal from
the ECM. The modified signal returns to the ECM as the fuel temper-
ature input. The sensor uses a ther mistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.

*: These data are reference values and are measured between ECM terminals 95 (Fuel tank temperature sensor) and ground.
Heated Oxygen Sensor 2INFOID:0000000009462500
DESCRIPTION
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air fuel ratio is c ontrolled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1 V in richer conditions to 0 V in leaner con-
ditions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
HEATED OXYGEN SENSOR 2 HEATER
Heated oxygen sensor 2 heater is integrated in the sensor.
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature.
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and cranking Operates.
When engine is stopped Stops in 1.5 seconds.
Except as shown above Sto ps .
Fluid temperature
[° C ( °F)] Voltage*
(V) Resistance
(kΩ)
20 (68) 3.5 2.3 - 2.7
50 (122) 2.2 0.79 - 0.90
SEF012P
SEF327R
Engine speed Heated oxygen sensor 2 heater
Above 3,600 rpm OFF
Below 3,600 rpm after the following conditions are met.
• Engine: After warming up
• Keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load ON
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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-566
< SYSTEM DESCRIPTION >[VQ35DE]
SYSTEM
ECM controls the engine by various functions.
ENGINE CONTROL SYSTEM : Fail-safeINFOID:0000000009462514
NON DTC RELATED ITEM
DTC RELATED ITEM
Function Reference
Multiport fuel injection system EC-568, "MULTIPORT FUEL INJE
CTION SYSTEM : System De-
scription"
Electric ignition system EC-571, "ELECTRIC IGNITION SYSTEM : System Description"
Air conditioning cut control EC-573, "AIR CONDITIONING CUT
CONTROL : System Descrip-tion"
Automatic speed control device (ASCD) EC-574, "AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description"
Cooling fan control
EC-575, "COOLING FAN CONTROL : System Description"
Electronic controlled engine mount EC-577, "ELECTRONIC CONTROLLED ENGINE MOUNT : Sys-tem Description"
Evaporative emission systemEC-580, "EVAPORATIVE EMISSI
ON SYSTEM : System Descrip-tion"
Throttle control EC-581, "THROTTLE CONTROL : System Description"
Intake valve timing control EC-583, "INTAKE VALVE TIMING
CONTROL : System Descrip-tion"
Engine protection control at low engine oil pressure EC-583, "ENGINE PROTECTION
CONTROL AT LOW ENGINE OIL PRESSURE : System Description"
Fuel filler cap warning system EC-585, "FUEL FILLER CAP WARNING SYSTEM : System De-scription"
Variable induction air systemEC-586, "VARIABLE INDUCTION AI
R SYSTEM : System Descrip-tion"
Integrated control of engine, CVT, and ABS EC-588, "INTEGRATED CONTROL OF ENGINE, CVT, AND ABS : System Description"
Alternator power generation voltage variable control systemEC-588, "ALTERNATOR POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
: System Description"
CAN communication EC-588, "CAN COMMUNICATION : System Description"
Engine operating condi-
tion in fail-safe mode Detected items Remarks Reference
page
Engine speed will not
rise more than 2,500 rpm
due to the fuel cut Malfunction indicator
lamp circuit When there is an open circuit on MIL circuit, the ECM cannot warn the
driver by illuminating MIL when there is malfunction on engine control
system.
Therefore, when electrical controlled throttle and part of ECM related
diagnoses are continuously detected as NG for 5 trips, ECM warns the
driver that engine control system malfunctions and MIL circuit is open
by means of operating the fail-safe function.
The fail-safe function also operates when above diagnoses except MIL
circuit are detected and demands the driver to repair the malfunction. EC-973
DTC No. Detected items Engine operating condition in fail-safe mode
P0011
P0021 Intake valve timing control The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0101
P0102
P0103 Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM