2014 NISSAN TEANA coolant temperature

SERVICE DATA AND SPECIFICATIONS (SDS)EM-111
< SERVICE DATA AND SPECIFICATIONS (SDS) [QR25DE]
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Standard and LimitINFOID:0000000009460513
GENERAL SPECIFICATIONS
VA LV E T I M I N G
Unit: degree
*1: When running at idle with engine coolant temperature more than 60
°C (140 °F).
Cylinder arrangement
In-line 4
Displacement cm
3 (in3) 2,488 (151.82)
Bore and stroke mm (in) 89.0 x 100 (3.50 x 3.94)
Valve arrangement DOHC
Firing order 1-3-4-2
Number of piston rings Compression 2
Oil 1
Compression ratio 10.0:1
Compression pressure
kPa (kg/cm
2, psi) / 250 rpm Standard 1410 (14.4, 204.5)
Minimum 1220 (12.4, 176.9)
Differential limit between cylinders 100 (1.0, 14)
Va l v e t i m i n g : Intake valve
: Exhaust valve
ab c de f
VTC Minimum phasing
(Mechanical)
*1224 244 5 69 3 41
VTC Maximum phasing
(Mechanical)
*2224 244 35 29 48 4
Intermediate lock phasing
(Mechanical)
*3224 244 5 59 3 41
ALBIA0875GBALBIA0876GB
ALBIA0877GB
Revision: November 20132014 Altima NAM

EM-112
< SERVICE DATA AND SPECIFICATIONS (SDS) [QR25DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
*2: When the intake or exhaust valve opening angle is at the maximum.
*3: When starting the engine with engine coolant temperature 60
°C (140 °F) or less.
DRIVE BELTS
EXHAUST MANIFOLD
Unit: mm (in)
SPARK PLUG
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.
CYLINDER HEAD
Unit: mm (in)
VA LV E
Valve Dimensions
Unit: mm (in)
Tension of drive belts Auto adjustment by drive belt auto-tensioner
Surface distortion Description Limit
Exhaust manifold 0.3 (0.012)
Make DENSO
Type* Standard FXE20HE11C
Gap (nominal) 1.1 (0.043)
Description Limit
Head surface distortion 0.1 (0.004)
Description Standard
Spark plug tube installation height 41.7 (1.642)
PBIC0283E
Valve head diameter (D) Intake 35.5 - 35.8 (1.398 - 1.409)
Exhaust 30.3 - 30.6 (1.193 - 1.205)
SEM188
Revision: November 20132014 Altima NAM

GI-14
< HOW TO USE THIS MANUAL >
ABBREVIATIONS
E
F
G
H
ABBREVIATION DESCRIPTION E/T Exhaust temperature
EBD Electric brake force distribution EC Engine control
ECL Engine coolant level
ECM Engine control module ECT Engine coolant temperature
ECV Electrical control valve
EEPROM Electrically erasable pr ogrammable read only memory
EFT Engine fuel temperature
EGR Exhaust gas recirculation
EGRT Exhaust gas recirculation temperature EGT Exhaust gas temperature
EOP Engine oil pressure EP Exhaust pressure
EPR Exhaust pressure regulator EPS Electronically cont rolled power steering
ESP Electronic stability program system
EVAP canister Evaporative emission canister EVSE Electric vehicle supply equipmentEXC Exhaust control
ABBREVIATION DESCRIPTION FC Fan control
FCW Forward collision warning FIC Fuel injector controlFP Fuel pump
FR Front
FRP Fuel rail pressure
FRT Fuel rail temperatureFTP Fuel tank pressure FTT Fuel tank temperature
ABBREVIATION DESCRIPTION GND GroundGPS Global positioning systemGST Generic scan tool
ABBREVIATION DESCRIPTION HBMC Hydraulic body-motion control systemHDD Hard disk drive
HO2S Heated oxygen sensor HOC Heated oxidation catalyst
HPCM Hybrid power train control module
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

COMPONENT PARTSHAC-11
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONER]
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Air mix door motor RH The air mix door controls the mix of hot or cold air that enters the ventilation system. It is controlled
by the A/C auto amp. based on the position of the temperature dial. The air mix door motor RH re-
ceives position commands from the A/C auto amp. and reports actual door position back via an LCU
(Local Control Unit) installed inside the motor. Commands and responses are sent across the LIN (Lo-
cal Interconnect Network) to each motor simultaneously, with each motor having its own unique ad-
dress, thereby only responding to requests sent to its specific address. The LCU reads the door
position from a Position Balanced Resistor (PBR), also part of the motor, and returns that information
to the A/C auto amp. The LCU switches the polarity of the circuits connected to the DC motor to drive
the motor forward or backward as requested by the A/C auto amp. If the air mix door moves to a po-
sition less than 5% or more than 95% of its expected or allowed positions, the A/C auto amp. will set
a DTC.
Ambient sensor The ambient sensor measures the temperature of the air surrounding the vehicle. The sensor uses a
thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.
BCM The BCM receives the fan ON and A/C ON signals from the A/C auto amp. and sends a compressor
ON request to the ECM.
Blower motor The blower motor varies the speed at which the air flows through the ventilation system.
ECM The ECM sends a compressor ON request to the IPDM E/R based on the status of engine operation
and load as well as refrigerant pressure information. If all the conditions are met for A/C operation,
the ECM transmits the compressor ON request to the IPDM E/R. The ECM shares the refrigerant
pressure sensor signal, engine RPM, and engine coolant temperature with the A/C auto amp. via
CAN communication line.
Front blower motor relay The front blower motor relay controls the flow of current to fuse 17 and 27 in the Fuse Block (J/B).
The relay is connected directly to ground, and is energized when the ignition switch is in the ON or
START position.
Fuse Block (J/B) Located in the passenger compartment, behind the left lower IP, the Fuse Block (J/B) contains the
front blower motor relay and several fuses required for the air conditioner control system.
Intake door motor The intake door motor controls the position of the intake door. Fresh air is allowed to enter the cabin
in one position, and recirculated inside air is allowed to enter in the other position. At times the A/C
auto amp. may command partial fresh or recirculation based on evaporator or coolant temperatures.
The intake door motor receives position commands from the A/C auto amp. and reports actual door
position back via an LCU (Local Control Unit) installed inside the motor. Commands and responses
are sent across the LIN (Local Interconnect Network) to each motor simultaneously, with each motor
having its own unique address, thereby only responding to requests sent to its specific address. The
LCU reads the door position from a Position Balanced Resistor (PBR), also part of the motor, and re-
turns that information to the A/C auto amp. The LCU switches the polarity of the circuits connected to
the DC motor to drive the motor forward or backward as requested by the A/C auto amp. If the recir-
culation door moves to a position less than 5% or more than 95% of its expected or allowed positions,
the A/C auto amp. will set a DTC.
Intake sensor The intake sensor measures the temperature of the front evaporator fins. The sensor uses a ther-
mistor which is sensitive to the change in temperature. The electrical resistance of the thermistor de-
creases as temperature increases.
In-vehicle sensor In-vehicle sensor measures temperature of intake air that flows through aspirator to passenger room.
The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resis-
tance of the thermistor decreases as temperature increases.
IPDM E/R Refer to PCS-6, "RELAY CONTROL SYSTEM : System Description"
.
Mode door motor The mode door controls the direction the conditioned air passes through the ventilation system.
Through a series of levers and gears, the mode door controls the defrost door, the foot door, and the
vent door. There are 5 preset positions: VENT, B/L, FOOT, D/F, and DEF. The FOOT position can be
set to allow some airflow through to the defroster vent, or to completely block the defroster vent using
the CONSULT. The mode door motor receives position commands from the A/C auto amp. and re-
ports actual door position back via an LCU (Local Control Unit) installed inside the motor. Commands
and responses are sent across the LIN (Local Interconnect Network) to each motor simultaneously,
with each motor having its own unique address, thereby only responding to requests sent to its spe-
cific address. The LCU reads the door position from a Position Balanced Resistor (PBR), also part of
the motor, and returns that information to the A/C auto amp. The LCU switches the polarity of the cir-
cuits connected to the DC motor to drive the motor forward or backward as requested by the A/C auto
amp. The mode door has 5 expected positions and, therefore, can set up to 5 DTCs if the expected
position is not reported back to the A/C auto amp.
Component Description
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HAC-14
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONER]
SYSTEM
-
HAC-16, "Compressor Control"
-HAC-17, "Door Control"
-HAC-20, "Temperature Control"
- Correction for input value of each sensor
Ambient sensor (setting temperature correction)• A/C auto amp. controls passenger r oom temperature so that the optimum level always matches the temper-
ature level that the passenger may feel. Correction is appl ied to the target temperature that is set using tem-
perature control dial, according to ambient temperature detected by ambient sensor.
In-vehicle sensor [in-vehicle temperature correction]• Passenger room temperature detected by in-vehicle s ensor is corrected for each front air conditioning con-
trol (driver side and passenger side).
Intake sensor (intake temperature correction)• A/C auto amp. performs correction to change recogniti on intake temperature of A/C auto amp. quickly when
difference is large between recognition intake temperat ure and intake temperature detected by intake tem-
perature sensor. The correction is performed to change recognition intake temperature slowly when differ-
ence is small.
Sunload sensor (sunload amount correction)
• Sunload amount detected by sunload sensor is corrected for each air conditioning control.
• A/C auto amp. performs correction to change recogni tion sunload amount of A/C auto amp. slowly when
sunload amount changes quickly, for example when entering or exiting a tunnel.
Control by ECM- Cooling fan control Refer to EC-59, "COOLING FAN CONTROL : System De scription (with automatic air conditioner)"
(QR25DE) or EC-575, "COOLING FAN CONTRO L : System Description" (VQ35DE).
- Air conditioning cut control
Refer to EC-59, "COOLING FAN CONTROL : System De scription (with automatic air conditioner)"
(QR25DE) or EC-573, "AIR CONDITIONING CUT CONTROL : System Description" (VQ35DE).
Control by IPDM E/R- Relay control
Refer to PCS-6, "RELAY CONTROL SYSTEM : System Description"
.
- Cooling fan control
Refer to EC-59, "COOLING FAN CONTROL : System De scription (with automatic air conditioner)"
(QR25DE) or EC-575, "COOLING FAN CONTRO L : System Description" (VQ35DE).
Control by BCM- Relay control
Refer to BCS-7, "BODY CONTROL SYST EM : System Description"
.
Air Flow ControlINFOID:0000000009463095
DESCRIPTION
• A/C auto amp. changes duty ratio of blower motor dr ive signal and controls air flow continuously. When air
flow is increased, duty ratio of blower motor contro l signal gradually increases to prevent a sudden increase
in air flow.
• In addition to manual control and automatic control, air fl ow control consists of starting fan speed control, low
coolant temperature starting control, high in-vehicl e temperature starting control and fan speed control at
door motor operation
AUTOMATIC AIR FLOW CONTROL
• A/C auto amp. decides target air flow depending on target air mix door opening angle.
• A/C auto amp. changes duty ratio of blower motor c ontrol signal and controls the air flow continuously so
that air flow matches the target air flow.
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SYSTEMHAC-15
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONER]
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• When air outlet is VENT or B/L, the minimum air flow is changed depending on sunload.
STARTING AIR FLOW CONTROL
• When blower motor is activated, A/C auto amp. graduallyincreases duty ratio of blower motor control signal to prevent a
sudden increase in discharge air flow.
• It takes approximately 8 seconds for air flow to reach HI from LOW.
LOW COOLANT TEMPERATURE STARTING CONTROL
If the engine coolant temperature is 56 °C (133 °F) or less, to prevent
a cold discharged air flow, A/C auto amp. suspends blower motor
activation for a maximum of 150 seconds depending on target air
mix door opening angle. After this, blower motor control signal is
increased gradually, and blower motor is activated.
HIGH IN-VEHICLE TEMPERATURE STARTING CONTROL
When front evaporator fin temperature is high [intake sensor value is 35°C (95 °F) or more], to prevent a hot
discharged air flow, A/C auto amp. suspends blower moto r activation for approximately 3 seconds so that front
evaporator is cooled by refrigerant.
FAN SPEED CONTROL AT DOOR MOTOR OPERATION
When mode door motor is activated while air flow is more than the specified value, A/C auto amp. reduces fan
speed temporarily so that mode door moves smoothly.
Air Inlet ControlINFOID:0000000009463096
The intake door is automatically controlled by the temperature set-
ting, ambient temperature, in-vehicle temperature, intake tempera-
ture, amount of sunload and ON/OFF operation of the compressor.
Intake door automatic control selects FRE, 20% FRE, or REC
depending on a target air mix door opening angle, based on in-vehi-
cle temperature, ambient temperature, and sunload.
JMIIA0735GB
JMIIA0736GB
JMIIA0737GB
JMIIA0732GB
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HAC-16
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONER]
SYSTEM
Air Outlet Control
INFOID:0000000009463097
• While air outlet is in automatic control, A/C auto amp. selects the mode door position depending on a target air mix door angle and
outlet air temperature calculated from sunload.
• If ambient temperature is excessively low, D/F is selected to pre- vent windshield fogging when air outlet is set to FOOT.
Compressor ControlINFOID:0000000009463098
DESCRIPTION
• When the compressor activation condition is satisfied whil e blower motor is activated, A/C auto amp. trans-
mits A/C ON signal and blower fan ON signal to ECM via CAN communication.
• ECM judges that the compressor can be activated depending on the state of each sensor (refrigerant pres-
sure sensor signal and others) and transmits A/C comp ressor request signal to IPDM E/R via CAN commu-
nication.
• IPDM E/R turns A/C relay ON and activate s the compressor depending on request from ECM.
COMPRESSOR PROTECTION CONTROL AT PRESSURE MALFUNCTION
When high-pressure side value that is detected by refrigerant pressure sensor is as per the following state,
ECM requests IPDM E/R to turn A/C relay OFF and stops the compressor.
• 3.12 MPa (31.82 kg/cm
2, 452.4 psi) or more (When the engine speed is less than 1,500 rpm)
• 2.74 MPa (27.95 kg/cm
2, 397.3 psi) or more (When the engine speed is 1,500 rpm or more)
• 0.14 MPa (1.43 kg/cm
2, 20.3 psi) or less
COMPRESSOR OIL CIRCULATION CONTROL
When the engine starts while the engine coolant temperature is 56 °C (133 °F) or less, ECM activates the com-
pressor for approximately 6 seconds and circulates the compressor lubricant once.
LOW TEMPERATURE PROTECTION CONTROL
• When intake sensor detects that front evaporator fin temperature is 2.5 °C (37 °F) or less, A/C auto amp. requests ECM to turn com-
pressor OFF, and stops the compressor.
• When the front evaporator fin temperature returns to 5.0 °C (41 °F)
or more, the compressor is activated.
OPERATING RATE CONTROL
When set temperature is other than fully cold or air out let is “VENT”, “B/L” or “FOOT” A/C auto amp. controls
the compressor activation depending on ambient temperature.
AIR CONDITIONING CUT CONTROL
When set engine is running is excessively high load conditi on, ECM requests IPDM E/R to turn A/C relay OFF,
and stops the compressor. Refer to EC-56, "AIR CONDITIONING CUT CONT ROL : System Description (with
automatic air conditioner)" (QR25DE) or EC-573, "AIR CONDITIONING CUT CONTROL : System Descrip-
tion" (VQ35DE) for details.
JMIIA0730GB
JMIIA0742GB
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HAC-20
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONER]
SYSTEM
Temperature Control
INFOID:0000000009463100
• When ignition switch is in the ON position, A/C auto amp. always automatically controls temperatur e regardless of front air condi-
tioning operational state.
• A/C auto amp. calculates the target air mix door opening angle depending on set temperature, in-vehicle temperature, ambient
temperature, and sunload.
• Air mix door is controlled depending on the comparison of current
air mix door opening angle and target air mix door opening angle.
• Regardless of in-vehicle temperature, ambient temperature, and
sunload, air mix door is fixed at the fully cold position when set
temperature is 18.0 °C (60 °F), and at the fully hot position when set
temperature is 32.0 °C (90 °F).
Fail-safeINFOID:0000000009463101
FAIL-SAFE FUNCTION
If a communication error exists between the A/C auto amp., and the AV control unit and preset switch for 30
seconds or longer, air conditioning is controlled under the following conditions:
When ambient temperature is less than 3 °C (37 °F) and engine coolant temperature is less than 56 °C (133 °F)
When ambient temperature is 3 °C (37 °F) or more, or engine coolant temperature is 56 °C (133 °F) or more
JMIIA0731GB
Compressor : ON
Air outlet : DEF
Air inlet : FRE (Fresh air intake)
Blower fan speed : AUTO
Set temperature : Setting before communication error occurs
Compressor : ON
Air outlet : AUTO
Air inlet : 20% FRE (20% fresh air intake)
Blower fan speed : AUTO
Set temperature : Setting before communication error occurs
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM