2016 NISSAN NOTE engine coolant

EC-1
ENGINE
C
DE
F
G H
I
J
K L
M
SECTION EC
A
EC
N
O P
CONTENTS
ENGINE CONTROL SYSTEM
HR16DE
PRECAUTION ....... ........................................
8
PRECAUTIONS .............................................. .....8
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
8
On Board Diagnostic (OBD) System of Engine
and CVT ....................................................................
8
General Precautions .................................................9
PREPARATION ...........................................12
PREPARATION .............................................. ....12
Special Service Tools .......................................... ....12
Commercial Service Tools ......................................12
SYSTEM DESCRIPTION .............................14
COMPONENT PARTS ................................... ....14
ENGINE CONTROL SYSTEM ............................... ....14
ENGINE CONTROL SYSTEM :
Component Parts Location ....................................
14
ENGINE CONTROL SYSTEM : Component De-
scription ............................................................... ....
17
Accelerator Pedal Position Sensor ..........................18
Air Fuel Ratio Sensor 1 ...........................................19
Air Fuel Ratio Sensor 1 Heater ...............................19
Camshaft Position Sensor .......................................19
Clutch Pedal Position Switch ..................................20
Cooling Fan .............................................................20
Crankshaft Position Sensor .....................................20
ECM .................................................................... ....20
Electric Throttle Control Actuator ............................21
Engine Coolant Temperature Sensor ......................21
Engine Oil Pressure Sensor ....................................21
Engine Oil Temperature Sensor ..............................21
EVAP Canister Purge Volume Control Solenoid
Valve ................................................................... ....
22
EVAP Canister Vent Control Valve .........................22
EVAP Control System Pressure Sensor ..................22
Exhaust Valve Timing Cont rol Solenoid Valve ........23
Fuel Injector ......................................................... ....23
Fuel Pump ...............................................................23
Heated Oxygen Sensor 2 ........................................24
Heated Oxygen Sensor 2 Heater ............................24
Ignition Coil With Power Transistor .........................24
Intake Air Temperature Sensor ...............................24
Intake Valve Timing Control Solenoid Valve ...........25
Knock Sensor ...................................................... ....25
Battery Current Sensor (With Battery Tempera-
ture Sensor) .............................................................
25
Malfunction Indicator Lamp (MIL) ............................26
Mass Air Flow Sensor ..............................................26
Oil Pressure Warning Lamp ....................................26
Refrigerant Pressure Sensor ............................... ....27
Stop Lamp Switch & ASCD Brake Switch ...............27
Throttle Control Motor .......................................... ....27
Throttle Control Motor Relay ...................................27
Throttle Position Sensor ..........................................27
ASCD Steering Switch .............................................27
STRUCTURE AND OPERATION .....................28
Positive Crankcase Ventilation ................................28
On Board Refueling Vapor Recovery (ORVR) ........29
SYSTEM ............................................................30
ENGINE CONTROL SYSTEM ........................ ...........30
ENGINE CONTROL SYSTEM : System Diagram ....30
ENGINE CONTROL SYSTEM : System Descrip-
tion ...........................................................................
31
MULTIPORT FUEL INJECTION SYSTEM ................31
MULTIPORT FUEL INJECTION SYSTEM :
System Diagram ................................................. ....
32
MULTIPORT FUEL INJECTION SYSTEM : Sys-
tem Description ........................................................
32
ELECTRIC IGNITION SYSTEM .................................35
ELECTRIC IGNITION SYSTEM :
System Diagram ................................................. ....
35
Revision: August 2015 2016 Versa Note

cardiagn.com

PREPARATIONEC-13
< PREPARATION > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Tool name
(TechMate No.)
Description
Leak detector
i.e.: (J-41416) Locates the EVAP leak
EVAP service port adapter
i.e.: (J-41413-OBD) Applies positive pressure through EVAP service port
Fuel filler cap adapter
i.e.: (J-42909) Checks fuel tank vacuum relief valve opening pressure
Socket wrench
(—) Removes and installs engine coolant temperature sen-
sor
Oxygen sensor thread cleaner
i.e.: (J-43897-18), (J-43897-12) Reconditioning the exhaust system threads before in-
stalling a new oxygen sensor. Use with anti-seize lubri-
cant shown below.
a: 18 mm diameter with pitch 1.5 mm for Zirconia Ox-
ygen Sensor
b: 12 mm diameter with pitch 1.25 mm for Titania Ox-
ygen Sensor
Anti-seize lubricant
i.e.: (Permatex
TM 133AR or
equivalent meeting MIL specifica-
tion MIL-A-907) Lubricating oxygen sensor thread cleaning tool when re-
conditioning exhaust system threads.
S-NT703
S-NT704
ALBIA1353ZZ
S-NT705
AEM488
S-NT779
Revision: August 2015
2016 Versa Note

cardiagn.com

COMPONENT PARTSEC-15
< SYSTEM DESCRIPTION > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
1. Ignition coil No.4
(with power transistor) 2. Ignition coil No.3
(with power transistor) 3. Ignition coil No.2
(with power transistor)
4. Ignition coil No.1 (with power transistor) 5. PCV valve
6. Intake valve timing control solenoid
valve
7. Engine oil pressure sensor 8. Engine oil temperature sensor 9. Knock sensor
10. Engine coolant temperature sensor 11. Camshaft position sensor 12. Exhaust valve timing control position
sensor
13. Exhaust valve timing control sole- noid valve 14. Fuel injector No.1 (Front)
15. Fuel injector No.1 (Rear)
16. Fuel injector No.2 (Front) 17. Fuel injector No.2 (Rear)18. Fuel injector No.3 (Front)
19. Fuel injector No.3 (Rear) 20. Fuel injector No.4 (Front)21. Fuel injector No.4 (Rear)
22. Crankshaft position sensor
A. Engine front right side B. Left view of the engineC. Engine rear right side
JSBIA0592ZZ
Revision: August 2015 2016 Versa Note

cardiagn.com

COMPONENT PARTSEC-17
< SYSTEM DESCRIPTION > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
ENGINE CONTROL SYSTEM : Component DescriptionINFOID:0000000012431270
1. ASCD steering switch
2. Active grille shutter3. Fuel level sensor unit and fuel pump
4. Fuel tank temperature sensor 5. EVAP control system pressure sen- sor6. EVAP canister
7. EVAP canister vent control valve 8. ASCD brake switch 9. Stop lamp switch
10. Clutch pedal position switch 11. Accelerator pedal position sensor
A. Fuel tank B. Rear under bodyC. Periphery of pedals
ALBIA1072ZZ
Component Reference
ECM EC-20, "
ECM"
A/F sensor 1EC-19, "Air Fuel Ratio Sensor 1"
A/F sensor 1 heaterEC-19, "Air Fuel Ratio Sensor 1 Heater"
Accelerator pedal position sensorEC-18, "Accelerator Pedal Position Sensor"
Cooling fan motor EC-20, "Cooling Fan"
Crankshaft position sensorEC-20, "Crankshaft Position Sensor"
Electric throttle control actuatorEC-21, "Electric Throttle Control Actuator"
Engine coolant temperature sensorEC-21, "Engine Coolant Temperature Sensor"
Revision: August 2015 2016 Versa Note

cardiagn.com

COMPONENT PARTSEC-21
< SYSTEM DESCRIPTION > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Electric Throttle Control ActuatorINFOID:0000000012431279
Electric throttle control actuator consists of throttle control mo
tor, throttle position sensor, etc.
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 valve in response to driving conditions via the throttle control motor.
Engine Coolant Temperature SensorINFOID:0000000012431280
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 electrical resistance of the ther-
mistor decreases as temperature increases.

*: These data are reference values and are measured between ECM terminals.
Engine Oil Pressure SensorINFOID:0000000012431281
The engine oil pressure (EOP) sensor is detects engine oil pressure
and transmits a voltage signal to the ECM.
Engine Oil Temperature SensorINFOID:0000000012431282
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 thermistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.
SEF594K
Engine coolant temperature [ °C ( °F)] Voltage* (V) Resistance (k Ω)
–10 (14) 4.47.0 - 11.4
20 (68) 3.52.10 - 2.90
50 (122) 2.20.68 - 1.00
90 (194) 0.90.236 - 0.260
SEF012P
JSBIA0292ZZ
SEF594K
Revision: August 2015 2016 Versa Note

cardiagn.com

EC-24
< SYSTEM DESCRIPTION >[HR16DE]
COMPONENT PARTS
Heated Oxygen Sensor 2
INFOID:0000000012431289
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 cont rolled 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 ox ygen sensor 2 is not used for
engine control operation.
Heated Oxygen Sensor 2 HeaterINFOID:0000000012431290
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxy gen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature.
OPERATION
Ignition Coil With Power TransistorINFOID:0000000012431291
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/O FF operation induces the proper high voltage in the coil
secondary circuit.
Intake Air Temperature SensorINFOID:0000000012431292
The intake air temperature sensor is built-into mass air flow sensor
(1). 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.
SEF327R
Sensor Input signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS) Engine speed
Heated oxygen sensor 2
heater controlHeated oxygen sensor 2 heater
Engine coolant temperature sensor Engine coolant temperature
Mass air flow sensor Amount of intake air
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
PBIA9559J
Revision: August 2015
2016 Versa Note

cardiagn.com

SYSTEMEC-33
< SYSTEM DESCRIPTION > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
*1: M/T models
*2: CVT models
*3: This sensor is not used to contro
l the engine system under normal conditions.
*4: ECM determines the start signal status by the signals of engine speed and battery voltage.
*5: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). T he amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from the crankshaft position sensor, camshaft position sen-
sor and the mass air flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.

• During warm-up
• When starting the engine
• During acceleration
• Hot-engine operation
• When selector lever position is changed from N to D (CVT models)
• High-load, high-speed operation
• During deceleration
• During high engine speed operation
Sensor Input signal to ECM ECM functionActuator
Crankshaft position sensor (POS) Engine speed
*4
Piston position
Fuel injection & mixture
ratio controlFuel injector
Camshaft position sensor (PHASE)
Mass air flow sensor
Amount of intake air
Intake air temperature sensor Intake air temperature
Engine coolant temperature sensor Engine coolant temperature
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch
*1
PNP signal
Transmission range switch*2
Battery Battery voltage*4
Knock sensor Engine knocking condition
Heated oxygen sensor 2
*3Density of oxygen in exhaust gas
EPS control unit EPS operation signal
*5
Combination meter
Vehicle speed*5
BCMA/C ON signal*5
Blower fan signal*5
Revision: August 2015
2016 Versa Note

cardiagn.com

EC-34
< SYSTEM DESCRIPTION >[HR16DE]
SYSTEM
MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)
The mixture ratio feedback sys
tem provides the best air-fuel mixture ra tio for drivability 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-19, "
Air Fuel Ratio 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 heated sensor 1 at low engine coolant temperature
- High engine coolant temperature
- During warm-up
- After shifting from N to D (CVT models)
- 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 compensation 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 carried out long-term to compensate for continual deviation
of the “short-term fuel trim” from the central value. Such deviation will occur due to individual engine differ-
ences, wear over time and changes in the usage environment.
PBIB2793E
Revision: August 2015 2016 Versa Note

cardiagn.com