2014 NISSAN TEANA ESP

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-556
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
The throttle position sensor has
two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.
Electronic Controlled Engine MountINFOID:0000000009462490
In the idle range, ECM turns OFF the electronically- controlled engine mount control solenoid valve and applies
manifold pressure to the electronically-controlled engi ne mount. This decreases damping force of the electron-
ically-controlled engine mount and absorbs vibrations trav eling from the engine to the body for improving the
quietness.
In the driving range, ECM turns ON the electronicall y-controlled engine mount control solenoid valve and cuts
manifold pressure applied on the electronically-controlled engine mount. This increases damping force of the
electronically-controlled engine mount and r educes vibrations generated during driving.
Engine Coolant Temperature SensorINFOID:0000000009462491
The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The elec trical resistance of the ther-
mistor decreases as temperature increases.

*: These data are reference values and are measured between ECM terminals.
PBIB0145E
SEF594K
Engine coolant temperature [° C ( °F)] Vol tag e* (V)
Resistance (k
Ω)
–10 (14) 4.4 7.0 - 11.4 20 (68) 3.5 2.37 - 2.63
50 (122) 2.2 0.68 - 1.00
90 (194) 0.9 0.236 - 0.260
SEF012P
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

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
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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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COMPONENT PARTSEC-561
< SYSTEM DESCRIPTION > [VQ35DE]
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The mass air flow sensor (1) is plac
ed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. The mass air flow sens or controls the temperature of the
hot wire to a certain amount. The heat generated by the hot wire is
reduced as the intake air flows around it. The more air, the greater
the heat loss.
Therefore, the electric current supplied to hot wire is changed to
maintain the temperature of the hot wire as air flow increases. The
ECM detects the air flow by means of this current change.
INTAKE AIR TEMPERATURE SENSOR
The intake air temperature sensor is built-into mass air flow sensor. The sensor detects intake air temperature
and transmits a signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical
resistance of the thermistor decreases in response to the temperature rise.

*: These data are reference values and are measured between ECM terminals.
Oil Pressure Warning LampINFOID:0000000009462506
Oil pressure warning lamp is located on the combination meter.
It indicates the low pressure of the engine oil and the malfunction of
the engine oil pressure system.
Combination meter turns the oil pressure warning lamp ON/OFF
according to the oil pressure warning lamp signal received from
ECM via CAN communication.
For details, refer to EC-583, "ENGINE PROTECTION CONTROL AT
LOW ENGINE OIL PRESSURE : System Description".
Power Valve Actuator 1 and 2INFOID:0000000009462507
The power valves are used to control the suction pa ssage of the variable induction air control system. They
are set in the fully closed or fully opened position by t he power valve actuators operated by the vacuum stored
in the vacuum tank. The vacuum to power valve actuat ors is controlled by the VIAS control solenoid valves.
PBIA9559J
Intake air temperature
[° C ( °F)] Voltag e* (V)
Resistance (k
Ω)
25 (77) 3.3 1.800 - 2.200
80 (176) 1.2 0.283 - 0.359
SEF012P
PBIA8559J
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EC-562
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
Refrigerant Pressure Sensor
INFOID:0000000009462508
The refrigerant pressure sensor is installed at the c ondenser 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.
Stop Lamp Switch & Brake Pedal Position SwitchINFOID:0000000009462509
Stop lamp switch and brake pedal position switch are installed to brake pedal bracket.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
VIAS Control Solenoid Valve 1 and 2INFOID:0000000009462510
The VIAS control solenoid valve cuts the intake manifold vacuum signal for power valve control. It responds to
ON/OFF signals from the ECM. When the solenoid is OFF, the vacuum signal from the intake manifold is cut.
When the ECM sends an ON signal the coil pulls the plunger downward and sends the vacuum signal to the
power valve actuator.
PBIB2657E
Brake pedal Brake pedal position switch Stop lamp switch
Released ON OFF
Depressed OFF ON
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-576
< SYSTEM DESCRIPTION >[VQ35DE]
SYSTEM
Manual Air Conditioning System
INPUT/OUTPUT SIGNAL CHART
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM via the CAN communication line.
*3: Automatic air conditioning system
*4: Manual air conditioning system
SYSTEM DESCRIPTION
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].
JSBIA0321GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
1
Piston position
Cooling fan
control IPDM E/R
↓
Cooling fan relay
↓
Cooling fan motor
Engine coolant temperature sensor Engine coolant temperature
Refrigerant pressure sensor Refrigerant pressure
Battery Battery voltage*
1
Combination meter
Vehicle speed signal*2
A/C auto amp.*3• A/C ON signal
• Blower fan ON signal
BCM
*4
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-578
< SYSTEM DESCRIPTION >[VQ35DE]
SYSTEM
*: This signal is sent to the ECM via the CAN communication line.
SYSTEM DESCRIPTION
The ECM controls the engine mount operation correspondi
ng to the engine speed. The control system has a
2-step control [Soft/Hard]
ELECTRONIC CONTROLLED ENGINE MOUNT LINE DRAWING
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed
Engine mount
control Electronic controlled en-
gine mount control solenoid
valve
Combination meter Vehicle speed*
Vehicle condition Engine mount control
Engine speed: Below 950 rpm Soft
Engine speed: Above 950 rpm Hard
JMBIA2161ZZ
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