heater NISSAN NOTE 2016 Service Repair Manual

AV
NORMAL OPERATING CONDITIONAV-51
< SYMPTOM DIAGNOSIS > [BASE AUDIO]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000012432888
RELATED TO NOISE
The majority of the audio concerns are the result of outside causes (bad CD, electromagnetic interference,
etc.).
The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.
• Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.
• Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the antenna at a different time from the waves which reflect off mountains or buildings.
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
Type of Noise and Possible Cause
RELATED TO HANDS-FREE PHONE
Occurrence condition Possible cause
Occurs only when engine is ON. A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.
• Ignition components
The occurrence of the noise is linked with the operation of the fuel pump. • Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating. A cracking or snapping sound occurs with the op-
eration of various switches.
• Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing. • Motor case ground
•Motor
The noise occurs constantly, not just under certain conditions. • Rear defogger coil malfunction
• Open circuit in printed heater
• Poor ground of antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially when
it is vibrating excessively. • Ground wire of body parts
• Ground due to improper part installation
• Wiring connections or a short circuit
Symptom
Cause and Counter measure
Does not recognize cellular phone connection (No connection is
displayed on the display at the guide). Some Bluetooth
® enabled cellular phones may not be recognized
by the in-vehicle phone module.
Refer to “RELATED TO HANDS-FREE PHONE (Check Compati-
bility)” in AV- 4 8 , "
Symptom Table".
Cannot use hands-free phone. Customer will not be able to use a hands-free phone under the fol-
lowing conditions:
• The vehicle is outside of the telephone service area.
• The vehicle is in an area where it is difficult to receive radio
waves; such as in a tunnel, in an underground parking garage,
near a tall building or in a mountainous area.
• The cellular phone is locked to prevent it from being dialed.
NOTE:
While a cellular phone is connected through the Bluetooth
® wire-
less connection, the battery power of the cellular phone may dis-
charge quicker than usual. The Bluetooth
® Hands-Free Phone
System cannot charge cellular phones.
Revision: August 2015 2016 Versa Note

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AV
NORMAL OPERATING CONDITIONAV-111
< SYMPTOM DIAGNOSIS > [DISPLAY AUDIO]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000012432976
RELATED TO NOISE
The majority of the audio concerns are the result of outside causes (bad CD, electromagnetic interference,
etc.).
The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.
• Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.
• Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the antenna at a different time from the waves which reflect off mountains or buildings.
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
Type of Noise and Possible Cause
RELATED TO HANDS-FREE PHONE
Occurrence condition Possible cause
Occurs only when engine is ON. A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.
• Ignition components
The occurrence of the noise is linked with the operation of the fuel pump. • Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating. A cracking or snapping sound occurs with the op-
eration of various switches.
• Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing. • Motor case ground
•Motor
The noise occurs constantly, not just under certain conditions. • Rear defogger coil malfunction
• Open circuit in printed heater
• Poor ground of antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially when
it is vibrating excessively. • Ground wire of body parts
• Ground due to improper part installation
• Wiring connections or a short circuit
Symptom
Cause and Counter measure
Does not recognize cellular phone connection (No connection is
displayed on the display at the guide). Some Bluetooth
® enabled cellular phones may not be recognized
by the in-vehicle phone module.
Refer to “RELATED TO HANDS-FREE PHONE (Check Compati-
bility)” in AV- 1 0 8 , "
Symptom Table".
Cannot use hands-free phone. Customer will not be able to use a hands-free phone under the fol-
lowing conditions:
• The vehicle is outside of the telephone service area.
• The vehicle is in an area where it is difficult to receive radio
waves; such as in a tunnel, in an underground parking garage,
near a tall building or in a mountainous area.
• The cellular phone is locked to prevent it from being dialed.
NOTE:
While a cellular phone is connected through the Bluetooth
® wire-
less connection, the battery power of the cellular phone may dis-
charge quicker than usual. The Bluetooth
® Hands-Free Phone
System cannot charge cellular phones.
Revision: August 2015 2016 Versa Note

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AV-232
< SYMPTOM DIAGNOSIS >[NAVIGATION]
NORMAL OPERATING CONDITION
NORMAL OPERATING CONDITION
DescriptionINFOID:0000000012433093
RELATED TO NOISE
The majority of the audio concerns are the result of outside causes (bad CD, electromagnetic interference,
etc.).
The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.
• Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.
• Multi-path noise: This noise results from the waves s ent directly from the broadcast station arriving at the
antenna at a different time from the waves which reflect off mountains or buildings.
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
Type of Noise and Possible Cause
RELATED TO HANDS-FREE PHONE
Occurrence condition Possible cause
Occurs only when engine is ON. A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.
• Ignition components
The occurrence of the noise is linked with the operation of the fuel pump. • Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating. A cracking or snapping sound occurs with the op-
eration of various switches.
• Relay malfunction, AV control unit malfunc-
tion
The noise occurs when various motors are operat-
ing. • Motor case ground
• Motor
The noise occurs constantly, not just under certain conditions. • Rear defogger coil malfunction
• Open circuit in printed heater
• Poor ground of antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially when
it is vibrating excessively. • Ground wire of body parts
• Ground due to improper part installation
• Wiring connections or a short circuit
Symptom
Cause and Counter measure
Does not recognize cellular phone connection (No connection is
displayed on the display at the guide). Some Bluetooth
® enabled cellular phones may not be recognized
by the in-vehicle phone module.
Refer to “RELATED TO HANDS-FREE PHONE (Check Compati-
bility)” in AV- 2 2 8 , "
Symptom Table".
Cannot use hands-free phone. Customer will not be able to use a hands-free phone under the fol-
lowing conditions:
• The vehicle is outside of the telephone service area.
• The vehicle is in an area where it is difficult to receive radio
waves; such as in a tunnel, in an underground parking garage,
near a tall building or in a mountainous area.
• The cellular phone is locked to prevent it from being dialed.
NOTE:
While a cellular phone is connected through the Bluetooth
® wire-
less connection, the battery power of the cellular phone may dis-
charge quicker than usual. The Bluetooth
® Hands-Free Phone
System cannot charge cellular phones.
Revision: August 2015 2016 Versa Note

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EM-88
< UNIT REMOVAL AND INSTALLATION >[HR16DE]
ENGINE ASSEMBLY
• Remove the engine and the transaxle assembly from the vehicle downward. Separate the engine and the
transaxle.
REMOVAL
1. Release fuel pressure. Refer to EC-137, "Work Procedure".
2. Drain engine coolant from radiator. Refer to CO-8, "
Draining Engine Coolant".
CAUTION:
• Perform this step when the engine is cold.
• Do not spill engine coolant on drive belts.
3. Remove the following parts: • Front wheels and tires (RH/LH). Refer to WT-48, "
Removal and Installation".
• Front fender protector (RH/LH). Refer to EXT-38, "
Exploded View".
• Drive belt. Refer to EM-16, "
Removal and Installation".
• Battery and battery tray. Refer to PG-70, "
Exploded View".
• Air duct (inlet), air duct, and air cleaner case assembly. Refer to EM-26, "
Removal and Installation".
• Radiator hose (upper and lower). Refer to CO-13, "
Exploded View".
• Exhaust front tube. Refer to EX-5, "
Exploded View".
4. Disconnect engine room harness connector at the ECM and CVT (if equipped). CAUTION:
Protect connectors against foreign materials during the operation by wrapping in a plastic bag.
5. Disconnect heater hoses. Refer to CO-13, "
Exploded View".
6. Disconnect fuel feed hose at engine side. Refer to EM-40, "
Exploded View".
7. Disconnect control linkage cable from transaxle. Refer to TM-20, "
Exploded View" (M/T models) and TM-
234, "Exploded View" (CVT models).
8. Disconnect clutch tube on transaxle side from clutch damper (M/T models). Refer to CL-15, "
Exploded
View".
9. Remove generator. Refer to CHG-29, "
Exploded View".
10. Disconnect vacuum hose at engine side.
11. Remove EVAP hoses at engine side.
12. Remove A/C compressor from the engine with the piping connected. Temporarily position the A/C com-
pressor on the vehicle side with a rope without placing a heavy load on the piping.
13. Remove ground cable at transaxle side.
14. Remove drive shafts (RH/LH). Refer to FAX-19, "
Removal and Installation".
15. Remove rear torque rod (1).
16. When engine can be hoisted, install engine slinger to cylinder head front left side (A) and rear right side (B) and support the
engine position with a suitable tool.
(2) : Rear engine mounting bracket
: Front
JSBIA0643ZZ
: Engine front
Slinger (A) bolts : 65 N·m (6.6 kg-m, 48 ft-lb)
Slinger (B) bolts : 25 N·m (2.6 kg-m, 18 ft-lb)
AWBIA1134GB
Revision: August 2015 2016 Versa Note

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EC-1
ENGINE
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SECTION EC
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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
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EC-3
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MIXTURE RATIO SELF-LEARNING VALUE
CLEAR ............................................................ ..
132
Description .......................................................... ..132
Work Procedure ....................................................132
BASIC INSPECTION ........................................133
Work Procedure .................................................. ..133
FUEL PRESSURE CHECK ..............................137
Work Procedure .................................................. ..137
HOW TO SET SRT CODE ................................139
Description .......................................................... ..139
SRT Set Driving Pattern ........................................140
Work Procedure ....................................................142
HOW TO ERASE PERMANENT DTC ..............145
Description .......................................................... ..145
Work Procedure (Group A) ...................................146
Work Procedure (Group B) ...................................148
DTC/CIRCUIT DIAGNOSIS .......................151
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE ............................................................ ..
151
Description .......................................................... ..151
Component Function Check ..................................151
Diagnosis Procedure .............................................152
POWER SUPPLY AND GROUND CIRCUIT ....159
Diagnosis Procedure ........................................... ..159
U0101 CAN COMM CIRCUIT ...........................162
Description .......................................................... ..162
DTC Logic .............................................................162
Diagnosis Procedure .............................................162
U0284 ACTIVE GRILLE SHUTTER .................163
DTC Logic ........................................................... ..163
Diagnosis Procedure .............................................163
U1001 CAN COMM CIRCUIT ...........................164
Description .......................................................... ..164
DTC Logic .............................................................164
Diagnosis Procedure .............................................164
U1040 ENG COMM CIRCUIT ...........................165
DTC Logic ........................................................... ..165
Diagnosis Procedure .............................................165
U1044 ENG COMM CIRCUIT ...........................166
DTC Logic ........................................................... ..166
Diagnosis Procedure .............................................166
P0011 IVT CONTROL ......................................167
DTC Logic ........................................................... ..167
Diagnosis Procedure .............................................168
Component Inspection ..........................................169
P0014 EVT CONTROL .....................................171
DTC Logic .............................................................171
Diagnosis Procedure .............................................172
Component Inspection ......................................... ..173
P0030, P0031, P0032 A/F SENSOR HEATER .174
DTC Logic ............................................................ ..174
Diagnosis Procedure .............................................174
Component Inspection ...........................................175
P0037, P0038 HO2S2 HEATER .....................177
DTC Logic ..............................................................177
Diagnosis Procedure .............................................177
Component Inspection ...........................................178
P0075 IVT CONTROL SOLENOID VALVE ....180
DTC Logic ..............................................................180
Diagnosis Procedure .............................................180
Component Inspection ...........................................181
P0078 EVT CONTROL SOLENOID VALVE ...182
DTC Logic ..............................................................182
Diagnosis Procedure .............................................182
Component Inspection ...........................................183
P0101 MAF SENSOR .....................................185
DTC Logic ..............................................................185
Diagnosis Procedure .............................................185
Component Inspection ...........................................187
P0102, P0103 MAF SENSOR .........................190
DTC Logic ..............................................................190
Diagnosis Procedure .............................................190
Component Inspection ...........................................192
P0111 IAT SENSOR .......................................195
DTC Logic ..............................................................195
Component Function Check ..................................196
Diagnosis Procedure .............................................196
Component Inspection ...........................................196
P0112, P0113 IAT SENSOR ...........................197
DTC Logic ..............................................................197
Diagnosis Procedure .............................................197
Component Inspection ...........................................198
P0116 ECT SENSOR ......................................199
DTC Logic ..............................................................199
Component Function Check ..................................200
Diagnosis Procedure .............................................200
Component Inspection ...........................................200
P0117, P0118 ECT SENSOR ..........................201
DTC Logic ..............................................................201
Diagnosis Procedure .............................................201
Component Inspection ...........................................202
P0122, P0123 TP SENSOR ............................203
DTC Logic ..............................................................203
Diagnosis Procedure .............................................203
Component Inspection ...........................................204
P0125 ECT SENSOR ......................................206
DTC Logic ..............................................................206
Diagnosis Procedure .............................................206
Revision: August 2015 2016 Versa Note

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COMPONENT PARTSEC-17
< SYSTEM DESCRIPTION > [HR16DE]
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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

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EC-18
< SYSTEM DESCRIPTION >[HR16DE]
COMPONENT PARTS
Accelerator Pedal Position Sensor
INFOID:0000000012431271
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 potentiometer which transform the accelerator pedal
position into output voltage, and emit 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.
Engine oil pressure sensor EC-21, "Engine Oil Pressure Sensor"
Engine oil temperature sensorEC-21, "Engine Oil Temperature Sensor"
EVAP canister purge volume control solenoid valveEC-22, "EVAP Canister Purge Volume Control Solenoid Valve"
EVAP canister vent control valveEC-22, "EVAP Canister Vent Control Valve"
EVAP control system pressure sensorEC-22, "EVAP Control System Pressure Sensor"
Exhaust valve timing control position sensor EC-19, "Camshaft Position Sensor"
Exhaust valve timing control solenoid valveEC-23, "Exhaust Valve Timing Control Solenoid Valve"
Fuel injectorEC-23, "Fuel Injector"
Fuel pumpEC-23, "Fuel Pump"
Heated oxygen sensor 2EC-24, "Heated Oxygen Sensor 2"
Heated oxygen sensor 2 heaterEC-24, "Heated Oxygen Sensor 2 Heater"
Ignition coil (with power transistor)EC-24, "Ignition Coil With Power Transistor"
Intake air temperature sensorEC-24, "Intake Air Temperature Sensor"
Camshaft position sensorEC-19, "Camshaft Position Sensor"
Intake valve timing control solenoid valveEC-25, "Intake Valve Timing Control Solenoid Valve"
Knock sensorEC-25, "Knock Sensor"
Mass air flow sensorEC-26, "Mass Air Flow Sensor"
PCV valveEC-28, "Positive Crankcase Ventilation"
Refrigerant pressure sensorEC-27, "Refrigerant Pressure Sensor"
Stop lamp switchEC-27, "Stop Lamp Switch & ASCD Brake Switch"
Throttle control motorEC-27, "Throttle Control Motor"
Throttle control motor relay EC-27, "Throttle Control Motor Relay"
Throttle position sensor EC-27, "Throttle Position Sensor"
ASCD steering switchEC-27, "ASCD Steering Switch"
ASCD brake switchEC-27, "Stop Lamp Switch & ASCD Brake Switch"
Clutch pedal position switchEC-20, "Clutch Pedal Position Switch"
Active grille shutterEXT-10, "ACTIVE GRILLE SHUTTER SYSTEM : Active grille shutter"
Component Reference
PBIB1741E
Revision: August 2015 2016 Versa Note

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COMPONENT PARTSEC-19
< SYSTEM DESCRIPTION > [HR16DE]
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Air Fuel Ratio Sensor 1INFOID:0000000012431272
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 m
easurement = 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 addition, a heater is integrated in the
sensor to ensure the required operating temperature of about 800 °C
(1,472 °F).
Air Fuel Ratio Sensor 1 HeaterINFOID:0000000012431273
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F s ensor 1 element within the specified range.
Camshaft Position SensorINFOID:0000000012431274
The camshaft position sensor senses the protrusion of camshaft to
identify a particular cylinder. The camshaft position sensor senses
the piston position.
When the crankshaft position sensor system becomes inoperative,
the camshaft position sensor provides various controls of engine
parts instead, utilizing timing of cylinder identification signals.
The sensor consists of a permanent magnet and Hall IC.
When engine is running, the high and low parts of the teeth cause
the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic fiel d, the voltage from the sensor
changes.
JMBIA0112GB
PBIB3354E
Sensor Input Signal to ECM ECM functionActuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS) Engine speed
Air fuel ratio (A/F) sensor 1
heater controlAir fuel ratio (A/F) sensor 1
heater
Mass air flow sensor Amount of intake air
PBIA9209J
Revision: August 2015 2016 Versa Note

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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

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