2014 NISSAN TEANA engine

HAC-110
< PRECAUTION >[MANUAL AIR CONDITIONER]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint Syst
em (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000009951776
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SR and SB section of
this Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery and wait at least three minutes before performing any service.
Precaution for WorkINFOID:0000000009463187
• When removing or disassembling each component, be careful not to damage or deform it. If a component may be subject to interference, be sure to protect it with a shop cloth.
• When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component with a shop cloth or vinyl tape to protect it.
• Protect the removed parts with a s hop cloth and prevent them from being dropped.
• Replace a deformed or damaged clip.
• If a part is specified as a non-reusable part, always replace it with a new one.
• Be sure to tighten bolts and nuts securely to the specified torque.
• After installation is complete, be sure to check that each part works properly.
• Follow the steps below to clean components:
- Water soluble dirt:
• Dip a soft cloth into lukewarm water, wring the water out of the cloth and wipe the dirty area.
• Then rub with a soft, dry cloth.
- Oily dirt:
• Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%) and wipe the dirty area.
• Then dip a cloth into fresh water, wring the water out of the cloth and wipe the detergent off.
• Then rub with a soft, dry cloth.
- Do not use organic solvent such as thinner, benzene, alcohol or gasoline.
- For genuine leather seats, use a genuine leather seat cleaner.
Working with HFC-134a (R-134a)INFOID:0000000009463188
WARNING:
• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refr igerant are not compatible. If the refrigerants
are mixed compressor failure is likely to occur. Refer to HA-25, "Inspection"
. To determine the purity
of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant Recovery/Recycling Recharg-
ing equipment and Refrigerant Identifier.
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COMPONENT PARTSHAC-115
< SYSTEM DESCRIPTION > [MANUAL AIR CONDITIONER]
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Component DescriptionINFOID:0000000009463193
7. Refrigerant pressure sensor (view with front bumper fascia removed) 8. Blower motor (view with front air con-
ditioning assembly removed from ve-
hicle) 9. Intake door motor
10. Mode door motor 11. Air mix door motor
Component Description
A/C Compressor Vaporized refrigerant is drawn into the A/C compressor from the evaporator, where it is compressed
to a high pressure, high temperature vapor. The hot, compressed vapor is then discharged to the con-
denser.
Air mix door motor The air mix door controls the mix of hot or cold air that enters the ventilation system. It is controlled
by the front air control based on the position of the temperature dial. The air mix door motor receives
position commands from the front air control 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 In-
terconnect 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 returns that information to the front
air control. The LCU switches the polarity of the circuits connected to the DC motor to drive the motor
forward or backward as requested by the front air control.
BCM The BCM receives the fan ON and A/C ON signals from the front air control 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 front air control via
CAN communication line.
Front air control The front air control controls the operation of the A/C and heating system based on inputs from the
temperature control knob, the mode switches, the blower control dial, and inputs received from the
ECM and combination meter across the CAN.
Front blower motor relay The front blower motor relay controls the flow of current to fuses 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 front
air control may command partial fresh or recirculation based on evaporator or coolant temperatures.
The intake door motor receives position commands from the front air control 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 front air control. The LCU switches the polarity of the circuits connected
to the DC motor to drive the motor forward or backward as requested by the front air control.
IPDM E/R Refer to PCS-6, "RELAY CONTROL SYSTEM : System Description"
.
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SYSTEM
HAC-119
< SYSTEM DESCRIPTION > [MANUAL AIR CONDITIONER]
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2. The blower speed dial is turned completely counterclockwise to the OFF position.
3. The A/C switch is manually turned OFF.
In other words, the compressor ON request cannot be turned off in D/F or DEF modes.
REFRIGERANT PRESSURE PROTECTION
The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure sen-
sor, located on the liquid tank on the condenser. The refr igerant pressure sensor detects the pressure inside
the refrigerant line and sends a voltage signal to the EC M. If the system pressure rises above or falls below
the following values, the ECM requests the IPDM E/ R to de-energize the A/C relay and disengage the com-
pressor.
• 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
PRESSURE RELIEF VALVE
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pressure of refrigerant in the system incr eases to an abnormal level [more than 2,990 kPa (30.5 kg/
cm
2, 433.6 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into
the atmosphere.
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.
OPERATING RATE CONTROL
When the set temperature is other than fully cold or the air outlet is “VENT”, “B/L” or “FOOT”, the front air con-
trol controls the compressor activation depending on ambient temperature.
Door ControlINFOID:0000000009463200
DOOR MOTOR CONTROL
• A Local Control Unit (LCU) is built into each door motor and detects the door position by using a Position
Balanced Resistor (PBR).
• Each door motor LCU has a unique address. The front air control communicates with the door motor LCUs by using each door’s unique communication address. The front air control sends requested door position
commands to each door motor LCU via a Local Interconnect Network (LIN) communication line. Each door
motor’s LCU receives the command and sends back a door position feedback signal.
• Each LCU controls each door to the appropriate posit ion depending on the control signal from the front air
control. When the door movement is complete, the LCU transmits a signal to the front air control indicating
that the door movement is complete.
SWITCHES AND THEIR CONTROL FUNCTION
ALIIA0607GB
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SYSTEM
HAC-121
< SYSTEM DESCRIPTION > [MANUAL AIR CONDITIONER]
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Temperature ControlINFOID:0000000009463201
• When the ignition switch is in the ON position, the cu stomer uses the front air control temperature control
dial to set the desired temperature.
• The front air control calculates the target front air mix door opening angle depending on the selected temper-
ature, intake temperature sensor, engine coolant temperature and rpm, and ambient temperature.
• Front air mix door is controlled depending on the comparison of current front air mix door opening angle and target front air mix door opening angle.
• Regardless of ambient temperature, the front air mix door is fixed at the fully cold position when the temper-
ature control dial is set at the full cold position and fi xed at the fully hot position when the temperature control
dial is set at the full hot position.
VENT MODE ( )
OUTLET VENT
ASST CTR
DR RR
ASST DR
AIR FLOW DISTRIBUTION RATIO (%) 22 22 22 22 12
B/L MODE ( )
OUTLET VENT FOOT
ASST CTR
DR RR Fr ASST Fr DR Rr ASST Rr DR
ASST DR
AIR FLOW DISTRIBUTION RATIO (%) 11 11 11 11 1 7 1 4 . 5 1 4 . 5 5 5
D/F1 MODE ( )
OUTLET VENT FOOT DEF
ASST CTR
DR RR Fr
ASST Fr DR
Rr
ASST Rr DR Fr Side
ASST DR
AIR FLOW DISTRIBUTION RATIO(%) 5 0 0 5 17 18 18 7 7 18 5
D/F2 MODE ( )
OUTLET VENT FOOT DEF
ASST CTR
DR RR Fr
ASST Fr DR
Rr
ASST Rr DR Fr Side
ASST DR
AIR FLOW DISTRIBUTION RATIO(%) 5 0 0 5 17 14 14 6.5 6.5 25 7
DEF MODE ( )
OUTLET VENT FOOT DEF
ASST CTR
DR RR Fr
ASST Fr DR
Rr
ASST Rr DR Fr Side
ASST DR
AIR FLOW DISTRIBUTION RATIO(%) 5 0 0 5 14 0 0 0 0 60 16
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HAC-140
< BASIC INSPECTION >[MANUAL AIR CONDITIONER]
OPERATION INSPECTION
OPERATION INSPECTION
Work ProcedureINFOID:0000000009463210
DESCRIPTION
The purpose of the operational check is to che
ck that the individual system operates normally.
OPERATION INSPECTION
1.CHECK BLOWER
1. Rotate the blower control dial clockwise one detent. Blower should operate on low speed.
2. Rotate the blower control dial one detent at a time, and continue checking blower speed until all speeds
are checked.
3. Leave blower on maximum speed.
Is the test result normal?
YES >> GO TO 2.
NO >> Refer to HAC-148, "Diagnosis Procedure"
.
2.CHECK A/C SWITCH LED
1. Press A/C switch.
2. A/C switch indicator should turn ON.
Is the test result normal?
YES >> GO TO 3.
NO >> Refer to HAC-152, "Diagnosis Procedure"
.
3.CHECK A/C SWITCH
Confirm that the compressor clutch engages (sound or visual inspection).
Is the test result normal?
YES >> GO TO 4.
NO >> Refer to HAC-151, "Diagnosis Procedure"
.
4.CHECK FRONT AIR CONTROL MODE LEDS
1. Press D/F ( ), FOOT ( ), B/L , and VENT , MAX A/C, and DEF ( ).
2. Each button indicator should illuminate.
Is the test result normal?
YES >> GO TO 5.
NO >> Refer to HAC-152, "Diagnosis Procedure"
.
5.CHECK DISCHARGE AIR
1. Press D/F ( ), FOOT ( ), B/L , and VENT and DEF ( ).
2. Confirm that discharge air comes out accordi ng to the air distribution table. Refer to HAC-119, "Door Con-
trol".
Is the test result normal?
YES >> GO TO 6.
NO >> Refer to HAC-154, "Symptom Table"
.
6.CHECK REC LED
1. Press DEF ( ) and make sure LED is off.
2. Make sure VENT ( ) or B/L ( ) is selected.
3. Press REC ( ) switch one time. REC indicator should illuminate. Check condition : Engine running
at normal operating temperature.
Check condition : Blower cont rol dial in OFF position.
Check condition : REC o ff (LED extinguished).
Check condition : VENT select ed (LED illuminated).
Check condition : DEF off (LED extinguished).
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HAC-156
< SYMPTOM DIAGNOSIS >[MANUAL AIR CONDITIONER]
INSUFFICIENT COOLING
YES >> GO TO 9
NO >> Check contaminated refrigerant. Refer to HA-9, "HFC-134a (R-134a) Service Tool and Equip-
ment".
9. CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to HA-28, "Inspection"
.
Is the inspection result normal?
YES >> Perform diagnostic work flow. Refer to HA-15, "Workflow".
NO >> GO TO 10
10. CHECK FOR EVAPORATOR FREEZE UP
Start engine and run A/C. Check for evaporator freeze up.
Does evaporator freeze up?
YES >> Perform diagnostic work flow. Refer HA-15, "Workflow".
NO >> GO TO 11
11 . CHECK AIR DUCTS
Check ducts for air leaks.
Is the inspection result normal?
YES >> System OK.
NO >> Repair air leaks.
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INSUFFICIENT HEATINGHAC-157
< SYMPTOM DIAGNOSIS > [MANUAL AIR CONDITIONER]
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INSUFFICIENT HEATING
Component Function CheckINFOID:0000000009463224
SYMPTOM: Insufficient heating
INSPECTION FLOW
1. CONFIRM SYMPTOM BY PERFORMING OP ERATION CHECK - TEMPERATURE INCREASE
1. Turn temperature control dial clockwise to maximum heat.
2. Check for hot air at discharge air outlets.
Can a symptom be duplicated?
YES >> GO TO 3
NO >> GO TO 2
2. CHECK FOR ANY SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to HAC-140, "Work Procedure"
.
Does another symptom exist?
YES >> Refer to HAC-154, "Symptom Table".
NO >> System OK.
3. CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4
4. CHECK ENGINE COOLING SYSTEM
1. Check for proper engine coolant level. Refer to CO-11, "System Inspection"
(QR25DE) or CO-35, "System
Inspection" (VQ35DE).
2. Check hoses for leaks or kinks.
3. Check radiator cap. Refer to CO-11, "System Inspection"
(QR25DE) or CO-35, "System Inspection"
(VQ35DE).
4. Check for air in cooling system.
>> GO TO 5
5. CHECK AIR MIX DOOR MOTOR OPERATION
Check and verify air mix door mechanism for smooth operation.
Does air mix door operate correctly?
YES >> GO TO 6
NO >> Check the air mix door motor circuit. Refer to HAC-144, "Diagnosis Procedure"
.
6. CHECK AIR DUCTS
Check for disconnected or leaking air ducts.
Is the inspection result normal?
YES >> GO TO 7
NO >> Repair all disconnected or leaking air ducts.
7. CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm it up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be
warm.
Is the inspection result normal?
YES >> GO TO 8
NO >> Both hoses warm: GO TO 9
8. CHECK ENGINE COOLANT SYSTEM
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HAC-158
< SYMPTOM DIAGNOSIS >[MANUAL AIR CONDITIONER]
INSUFFICIENT HEATING
Check thermostat operation. Refer to
CO-22, "Removal and Installation" (QR25DE) or CO-49, "Removal and
Installation" (VQ35DE).
Is the inspection result normal?
YES >> System OK.
NO >> Repair or replace as necessary.
9. CHECK HEATER HOSES
Check heater hoses for proper installation.
Is the inspection result normal?
YES >> System OK.
NO >> 1. Back flush heater core. 2. Drain the water from the system.
3. Refill system with new engine coolant. Refer to CO-12, "Changing Engine Coolant"
(QR25DE) or CO-36, "Changing Engine Coolant" (VQ35DE).
4. To retest GO TO 10
10. CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be
warm
Is the inspection result normal?
YES >> System OK.
NO >> Replace heater core. Refer to HA-42, "HEATER CORE : Removal and Installation"
.
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