heating NISSAN TEANA 2014 Workshop Manual

HAC-106
< REMOVAL AND INSTALLATION >[AUTOMATIC AIR CONDITIONER]
INTAKE SENSOR
INTAKE SENSOR
Removal and InstallationINFOID:0000000009463179
The intake sensor is not available separately and must be replaced with the heating and cooling unit as an
assembly. Refer to HA-41, "HEATING AND COOLING UNIT ASSEMBLY : Removal and Installation"
.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-108
< REMOVAL AND INSTALLATION >[AUTOMATIC AIR CONDITIONER]
DOOR MOTOR
DOOR MOTOR
Exploded ViewINFOID:0000000009463181
1. Front heating and cooling unit assembly 2. Mode door motor 3. Air mix door motor (LH)
4. Air mix door motor (RH) 5. Intake door motor
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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"
.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-154
< SYMPTOM DIAGNOSIS >[MANUAL AIR CONDITIONER]
HEATER AND AIR CONDITIONING
SYSTEM CONTROL SYMPTOMS
SYMPTOM DIAGNOSIS
HEATER AND AIR CONDITIONING SYSTEM CONTROL SYMPTOMS
Symptom TableINFOID:0000000009463222
SYMPTOM TABLE
Symptom Reference Page
A/C system does not come on. Go to Trouble Diagnosis Procedure for A/C System. HAC-152, "Diagno-
sis Procedure"
Air outlet does not change.
Go to Trouble Diagnosis Procedure for Mode Door Motor. (LIN) HAC-142, "Diagno-
sis Procedure"Mode door motor does not operate normally.
Discharge air temperature does not change. Go to Trouble Diagnosis Procedure for Air Mix Door Motor. (LIN) HAC-144, "Diagno-
sis Procedure"Air mix door motor does not operate normal-
ly.
Intake door does not change. Go to Trouble Diagnosis Procedure for Intake Door Motor. (LIN) HAC-146, "Diagno-
sis Procedure"Intake door motor does not operate normally.
Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Motor. HAC-148, "Diagno-
sis Procedure"
Magnet clutch does not engage. Go to Trouble Diagnosis Procedure for Magnet Clutch.HAC-151, "Diagno-sis Procedure"
Insufficient cooling Go to Trouble Diagnosis Procedure for Insufficient Cooling.HAC-155, "Compo-nent Function
Check"
Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating.HAC-157, "Compo-nent Function
Check"
Noise Go to Trouble Diagnosis Procedure for Noise.
HA-20, "Symptom Table"
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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"
.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-164
< REMOVAL AND INSTALLATION >[MANUAL AIR CONDITIONER]
DOOR MOTOR
DOOR MOTOR
Exploded ViewINFOID:0000000009463230
1. Front heating and cooling unit assembly 2. Mode door motor 3. Air mix door motor
4. Intake door motor
AWIIA1591ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

COMPONENT PARTSST-7
< SYSTEM DESCRIPTION >
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SYSTEM DESCRIPTION
COMPONENT PARTS
HEATED STEERING WHEEL SYSTEM
HEATED STEERING WHEEL SYSTEM : Component Parts LocationINFOID:0000000009461244
HEATED STEERING WHEEL SYSTEM : Component DescriptionINFOID:0000000009461245
1. Heated steering wheel 2. Spiral cable 3. Heated steering wheel switch
4. A/C Auto amp. (view with cluster lid C removed) 5. Heated steering relay
ALGIA0129ZZ
Components Description
A/C Auto amp. Controls the heated steering relay by providing a ground signal to the coil.
Heated steering wheel switch • Controls the heated steering relay by providing a ground signal to A/C Auto amp.
• Provides switch indicator for system.
Heated steering relay Provides battery power supply to heated steering wheel and switch indicator.
Heated steering wheel Contains heating element and over-heat protection.
Spiral cable Provides rotating electrical connection for heated steering wheel.
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SYSTEMSTC-9
< SYSTEM DESCRIPTION >
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HYDRAULIC PUMP ELECTRIC POWER STEE RING SYSTEM : Protection Function
INFOID:0000000009460346
• When the steering wheel is operated repeatedly or turned all the way for a long period during parking or low
speed driving, the function of the hydraulic pump elec tric power steering system becomes limited to prevent
the system from overheating. Cont inued operation of the steering wheel will cause the hydraulic pump elec-
tric power steering system to stop and the hydraulic pum p electric power steering system warning lamp may
come ON. In this case, the steering wheel operation temporarily becomes hard. This is not a malfunction.
When the engine is turned OFF (ignition switch OFF) and steering operation is stopped for a while, the tem-
perature of the hydraulic pump electric power steer ing system decreases and the steering operation returns
to normal after restarting the engine.
• Then, the hydraulic pump electric power steering syste m warning lamp turns OFF. If the system is OFF
under the protection state, the hydraulic pump electr ic power steering system warning lamp turns ON to
warn that the system is in the manual steering state. (This is not a system malfunction.) In addition, the fol-
lowing DTC remains to distinguish from malfunction.
C1608 Manual steering state
U1000 Normal control
NOTE:
If the cause is in a different ECU, the state changes to fixed steering assist force.
DTC Fail-safe condition
DTC vehicle condition
C160A The system temporarily enters the manual steering state. (This is not a hydraulic pump electric
power steering system malfunction.)
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

STC-12
< ECU DIAGNOSIS INFORMATION >
POWER STEERING CONTROL MODULE
*4: This may not agree with the speedometer indication immediately after the ignition switch is turned ON. This
is not a malfunction.
TERMINAL LAYOUT
PHYSICAL VALUES
Fail-safeINFOID:0000000009460349
When an error occurs in the hydraulic pump electric pow er steering system, fail-safe brings the system to a
halt (manual steering) or restricted (constant steering assi st level) state. When the system is in a halt state,
fail-safe turns ON the hydraulic pump electric power steer ing warning lamp to warn the driver that the hydrau-
lic pump electric power steering system is in the manual steering state.
Protection FunctionINFOID:0000000009460350
• When the steering wheel is operated repeatedly or turned all the way for a long period during parking or low
speed driving, the function of the hydraulic pump elec tric power steering system becomes limited to prevent
the system from overheating. If the steering wheel is operated further more, the hydraulic pump electric
power steering system stops and the hydraulic pump el ectric power steering system warning lamp may be
turned ON. In this case, the steering wheel operation temporarily becomes hard. This is not a malfunction.
When the engine is turned OFF (ignition switch OFF) and steering operation is stopped for a while, the tem-
perature of the hydraulic pump electric power steeri ng system decreases and the steering operation returns
to normal after restarting the engine.
JSGIA0835ZZ
Te r m i n a l N o .
(Wire Color) Description
Condition Value
+ − Signal name Input/Output
1
(W) Ground Battery power supply Input Always Battery Voltage
2
(B) Ground Ground — Always 0 V
5
(BR) Ground Ignition power supply Input Ignition switch: ON Battery Voltage
Ignition switch: OFF 0 V
7
(P) — CAN-L Input/Output — —
8
(L) — CAN-H Input/Output — —
DTC Fail-safe condition
C1143 Certain steering assist force
C1601 Manual steering state
C1606 Manual steering state
C1607 Certain steering assist force
C1608 Manual steering state
U1000 Normal control
NOTE:
If the cause is in a different ECU, the state changes to fixed steering assist force.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM