Its control NISSAN TEANA 2014 Service Manual

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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PRECAUTIONSEC-545
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•
B1 indicates bank 1, B2 indicates bank 2 as shown in the fig-
ure.
• Never operate fuel pump when there is no fuel in lines.
• Tighten fuel hose clamps to the specified torque.
• Never depress accelerator pedal when starting.
• Immediately after starting, n ever rev up engine unnecessarily.
• Never rev up engine just prior to shutdown.
• When installing C.B. ham radio or a mobile phone, be sure to
observe the following as it may adversely affect electronic
control systems depending on installation location.
- Keep the antenna as far as possible from the electronic con-
trol units.
- Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Never let them run parallel for a long distance.
- Adjust the antenna and feeder line so that the standing-wave
ratio can be kept smaller.
- Be sure to ground the radio to vehicle body.
SEC893C
SEF709Y
SEF708Y
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EC-548
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
ENGINE CONTROL SYSTEM
ENGINE CONTROL SYSTEM :
Component Parts LocationINFOID:0000000009462480
ENGINE ROOM
ALBIA0805ZZ
No. Component Function
1. Power valve actuator 1 EC-561, "Power Valve Actuator 1 and 2"
2. Electronic controlled engine mount control solenoid valveEC-556, "Electronic Controlled Engine Mount"
3. Cooling fan motor-2EC-554, "Cooling Fan"
4. Cooling fan motor-1EC-554, "Cooling Fan"
5. ECMEC-555, "ECM"
6. Refrigerant pressure sensorEC-562, "Refrigerant
Pressure Sensor"Refer to HAC-9, "Component Part Location" for detailed installa-
tionlocation.
7. Battery current sensor (with battery temperature sensor) EC-553, "Battery Current Sensor (With Battery Temperature Sen-
sor)"
8. Cooling fan motor relay-2
EC-554, "Cooling Fan"
9. Cooling fan motor relay-3EC-554, "Cooling Fan"
10. IPDM E/RIPDM E/R activates the internal control circuit to perform the relay
ON-OFF control according to the input signals from various sen-
sors and the request signals received from control units via CAN
communication.
Refer to PCS-4, "Component Parts Location"
for detailed installa-
tionlocation.
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EC-552
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
Accelerator Pedal Position Sensor
INFOID:0000000009462481
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The
ECM uses this signal for the engine operation such as fuel cut.
Air Fuel Ratio (A/F) Sensor 1INFOID:0000000009462482
DESCRIPTION
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In additi on, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 800 °C (1,472 °F).
8. EVAP control system pressure sensor EC-558, "EVAP Control System Pressure Sensor"
9. EVAP canister vent control valve EC-558, "EVAP Canister Vent Control Valve"
10. EVAP canisterEC-557, "EVAP Canister"
No. Component Function
JPBIA4615ZZ
PBIB1741E
JPBIA4038GB
JPBIA5446GB
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COMPONENT PARTSEC-557
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Engine Oil Pressure SensorINFOID:0000000009462492
The engine oil pressure (EOP) sens
or is detects engine oil pressure
and transmits a voltage signal to the ECM.
Engine Oil Temperature SensorINFOID:0000000009462493
The engine oil temperature sensor is used to detect the engine oil
temperature. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the engine oil tempera-
ture 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.
EVAP CanisterINFOID:0000000009462494
The fuel vapor in the sealed fuel tank is led into t he EVAP canister which contains activated carbon and the
vapor is stored there when the engine is not oper ating or when refueling to the fuel tank.
For details, refer to EC-580, "EVAPORATIVE EMISSION SYSTEM : System Description"
.
EVAP Canister Purge Volume Control Solenoid ValveINFOID:0000000009462495
The EVAP canister purge volume control solenoid valve is used to
control the flow rate of fuel v apor from the EVAP canister. The EVAP
canister purge volume control solenoid valve is moved by ON/OFF
pulses from the ECM. The longer the ON pulse, the greater the
amount of fuel vapor that will flow through the valve.
JSBIA0292ZZ
SEF594K
Engine oil temperature
[° C ( °F)] Vo l ta g 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
110 (230) 0.6 0.143 - 0.153
SEF012P
PBIB3489E
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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-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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EC-584
< SYSTEM DESCRIPTION >[VQ35DE]
SYSTEM
scription
INFOID:0000000009462524
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
• The engine protection control at low engine oil pressure warns the driver of a decrease in engine oil pres-
sure by the oil pressure warning lamp before the engine becomes damaged.
• When detecting a decrease in engine oil pressure at an engine speed less than 1,000 rpm, ECM transmits
an oil pressure warning lamp signal to the combination meter.The combination meter turns ON the oil pres-
sure warning lamp, according to the signal.
• When detecting a decrease in engine oil pressure at an engine speed 1,000 rpm or more, ECM transmits an
oil pressure warning lamp signal to the combination meter.
The combination meter turns ON the oil pressure warning lamp, according to the signals. When detecting a
decrease in engine oil pressure, ECM cuts fuel if the engine speed exceeds the specified value.
*: When detecting a normal engine oil pressure, ECM turns OFF the oil pressure warning lamp.
FUEL FILLER CAP WARNING SYSTEM
JSBIA1588GB
Sensor Input signal to ECM ECM function Actuator
Engine oil pressure sensor Engine oil pressure Engine protection control
• Oil pressure warning lamp
signal
• Fuel cut control Combination meter
(Oil pressure warning lamp)
Crankshaft position sensor
(POS) Engine speed
Engine oil temperature sensor Engine oil temperature
Decrease in engine oil pressure Engine speed Combination meter
Fuel cut
Oil pressure warning lamp
Detection Less than 1,000 rpm ON* NO
1,000 rpm or more ON YES
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SYSTEMEC-585
< SYSTEM DESCRIPTION > [VQ35DE]
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FUEL FILLER CAP WARNING SY
STEM : System DescriptionINFOID:0000000009462525
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
Input
*: This signal is sent to the ECM via the CAN communication line.
Output
*: This signal is sent to the combination meter via the CAN communication line.
SYSTEM DESCRIPTION
The fuel filler cap warning system alerts the driver to the prevention of the fuel filler being left uncapped and
malfunction occurrences after refueling, by turning ON the fuel filler cap warning display on the combination
meter.
ECM judges a refueled state, based on a fuel leve l signal transmitted from the combination meter.
When a very small leak is detected through the EVAP leak diagnosis performed after judging the refueled
state, ECM transmits a fuel filler cap warning display signal (request for display ON) to the combination meter
via CAN communication.
When receiving the signal, the combination meter tu rns ON the fuel filler cap warning display.
CAUTION:
Check fuel filler cap installation condition when the fuel filler cap warning display turns ON.
Reset Operation
The fuel filler cap warning lamp tunes OFF, according to any condition listed below:
• Reset operation is performed by operating the me ter control switch on the combination meter.
- When the reset operation is performed, the combination me ter transmits a fuel filler cap warning reset signal
to ECM via CAN communication. ECM transmits a fuel filler cap warning display signal (request for display
OFF) to the combination meter via CAN communication. When receiving the signal, the combination meter
turns OFF the fuel filler cap warning display.
• EVAP leak diagnosis result is normal.
• Fuel refilled.
• DTC erased by using CONSULT.
NOTE:
Unit/Sensor Input signal to ECM ECM function
EVAP control system pressure sensor Pressure in purge line
Fuel filler cap warning control
Combination meter Fuel level sensor signal
*
Fuel filler cap warning reset signal*
JSBIA1456GB
Unit Output signal Actuator
ECM Fuel filler cap warning display signal
*Combination meter
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