GW-14
< REMOVAL AND INSTALLATION >
FRONT DOOR GLASS
FRONT DOOR GLASS
Removal and InstallationINFOID:0000000009463662
WARNING:
• Before servicing, turn ignition sw itch OFF, disconnect both battery terminals and wait at least three
minutes.
• Do not use air tools or el ectric tools for servicing.
REMOVAL
NOTE:
LH side shown; RH side similar
1. Disconnect the battery positive and negative terminal. Refer to PG-73, "Removal and Installation (Bat-
tery)".
2. Remove the front door finisher. Refer to INT-15, "Removal and Installation"
.
3. Remove the vapor barrier. CAUTION:
Use care to not damage or tear vapor barrier during removal.
4. Remove the front door inside seal (1).
5. Temporarily reconnect both battery terminals and the main power window and door lock/unlock switch (LH door) or power window and door lock/unlock switch ( RH door) to raise/lower the door glass until the door
glass bolts can be seen through the access holes.
6. Remove the front door regul ator to glass bolts (A).
CAUTION:
When removing the front door regulator to glass bolts be
sure to secure glass to prevent it from falling.
7. While holding the front door glass, raise it at the rear end to pull the front door glass out of the sash toward the outside of the
door.
INSTALLATION
ALKIA2357ZZ
ALKIA2628ZZ
LIIA1687E
Revision: November 20132014 Altima NAM
GW-16
< REMOVAL AND INSTALLATION >
FRONT REGULATOR
FRONT REGULATOR
Exploded ViewINFOID:0000000009463664
Removal and Installation - Front RegulatorINFOID:0000000009463665
WARNING:
• Before servicing, turn ignition sw itch OFF, disconnect both battery terminals and wait at least three
minutes.
• Do not use air tools or el ectric tools for servicing.
REMOVAL
1. Disconnect the battery positive and negative terminal. Refer to PG-73, "Removal and Installation (Bat-
tery)".
2. Remove the front door finisher. Refer to INT-15, "Removal and Installation"
.
3. Remove the vapor barrier. CAUTION:
Use care to not damage or tear vapor barrier during removal.
4. Temporarily reconnect both battery terminals and the main power window and door lock/unlock switch (LH door) or power window and door lock/unlock switch ( RH door) to raise/lower the door glass until the door
glass bolts can be seen through the access holes.
1. Front door inside window seal 2. Front door panel 3. Front door glass channel front
4. Front door glass regulator motor 5. Front door glass channel rear 6. Front door glass regulator
7. Front door glass 8. Front door sash clip 9. Front door glass rubber run
RH side shown; LH side similar
ALKIA2641ZZ
Revision: November 20132014 Altima NAM
HAC-10
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONER]
COMPONENT PARTS
Component Description
INFOID:0000000009463092
1. ECM 2. IPDM E/R 3. BCM (view with combination meter removed)
4. A/C auto amp. (view with A/C switch assembly removed) 5. A/C switch assembly 6. A/C Compressor
7. Sunload sensor 8. Refrigerant pressure sensor (view with front bumper fascia removed)9. Ambient sensor
10. Fuse Block (J/B), Front blower motor relay 11. In-vehicle sensor 12. Accessory relay-2 (view with instru-
ment panel removed)
13. Blower motor (view with front A/C as- sembly removed from vehicle) 14. Intake door motor 15. Mode door motor
16. Air mix door motor LH 17. Air mix door motor RH 18. Intake sensor
ALIIA0599ZZ
Component Description
A/C auto amp. A/C auto amp. controls front automatic air conditioning system by inputting and calculating signals
from each sensor and each switch.
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.
A/C switch assembly The A/C switch assembly 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, the ambient temperature
sensor, the intake sensor, and inputs received from the ECM across the CAN. Diagnosis of the A/C
switch assembly can be performed using the CONSULT. There is no self-diagnostic feature available.
Air mix door motor LH 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 LH 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.
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
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
HAC-78
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Diagnosis ProcedureINFOID:0000000009463149
Regarding Wiring Diagram information, refer to
HAC-34, "Wiring Diagram".
1.CHECK FUSE
Check fuses [No. 14, 25 and 30, loca ted in the fuse block (J/B)].
NOTE:
Refer to PG-70, "Terminal Arrangement"
.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit.
2.CHECK A/C AUTO AMP. POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check voltage between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector between A/C auto amp. and fuse block (J/B).
3.CHECK A/C AUTO AMP. GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES >> Inspection End.
NO >> Repair harness or connector.
AIR MIX DOOR MOTOR (DRIVER SIDE)
AIR MIX DOOR MOTOR (DRIVE R SIDE) : Diagnosis ProcedureINFOID:0000000009463150
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
+
− Vo l ta g e
A/C auto amp. Ignition switch position
Connector Terminal OFF ACC ON
M152 3
GroundBattery voltage Battery voltage Battery voltage
13 Approx. 0 V Battery voltage Battery voltage
23 Approx. 0 V Approx. 0 V Battery voltage
40 Approx. 0 V Approx. 0 V Battery voltage
A/C auto amp. —Continuity
Connector Terminal
M152 2
Ground Yes
22
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
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-116
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONER]
COMPONENT PARTS
Mode door motorThe 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 front air control 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 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.
Refrigerant pressure sensor Refer to
EC-36, "Refrigerant Pressure Sensor"
for QR25DE and EC-562, "Refrigerant Pressure Sen-
sor" for VQ35DE.
Component Description
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
HAC-118
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONER]
SYSTEM
Control by ECM- Cooling fan control
Refer to EC-60, "COOLING FAN CONTROL : System Description (with manual air conditioner)"
(QR25DE)
or EC-575, "COOLING FAN CONTROL : System Description"
(VQ35DE).
- Air conditioning cut control Refer to EC-57, "AIR CONDITIONING CUT CONTROL : Sy stem Description (with manual 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-60, "COOLING FAN CONTROL : System Description (with manual air conditioner)"
(QR25DE)
or EC-575, "COOLING FAN CONTROL : System Description"
(VQ35DE).
Air Flow ControlINFOID:0000000009463196
DESCRIPTION
• Front air control changes duty ratio of front blower mo tor control signal to control air flow continuously. When
air flow is increased, duty ratio of front blower mo tor control signal gradually increases to prevent a sudden
increase in air flow.
• In addition to manual control, air flow control is composed of fan speed control at door motor operation.
FAN SPEED CONTROL AT DOOR MOTOR OPERATION
When mode door motor is activated while air flow is more than the specified value, front air control temporarily
reduces fan speed so that mode door moves smoothly.
Air Inlet ControlINFOID:0000000009463197
The intake door position is automatically controlled in MAX A/C and DEF modes. The intake door is controlled
by customer input in the other modes.
Air Outlet ControlINFOID:0000000009463198
Air outlet control is controlled by customer input. When t he A/C is turned off by turning the blower control dial
fully counterclockwise, the front air control retains the current selections and returns to these selections the
next time the blower control dial is turned to any fan position.
NOTE:
If ambient temperature is excessively low, D/F is se lected to prevent windshield fogging when air outlet is set
to FOOT.
Compressor ControlINFOID:0000000009463199
DESCRIPTION
In order for the IPDM E/R to complete a compress or ON request, the following conditions must be met:
1. The BCM detects a Fan ON signal from the front air control. The front air control grounds the fan ON sig-
nal monitored by the BCM when the blower speed dial is in any of the fan speed positions.
2. The BCM detects an A/C ON signal from the front air control. The front air control grounds the A/C ON sig-
nal monitored by the BCM when:
- The A/C switch is pressed. The A/C switch LED ill uminates and the front air control grounds the A/C ON
signal monitored by the BCM. Any mode c ontrol button except D/F may be selected.
- The A/C switch is OFF, and the MAX A/C button is pr essed. The A/C switch LED will automatically illumi-
nate and the front air control grounds the A/C ON signal monitored by the BCM.
- The A/C switch is OFF, and the mode button for either D/F or DEF is selected. The front air control
grounds the A/C ON signal monitored by the BCM, but it does not illuminate the A/C switch LED
NOTE:
If the compressor was engaged by pressing the D/F or DE F mode buttons, and the time spent in either mode
exceeds 1 minute, then the compressor stays reques ted, even when modes other than D/F or DEF are
selected, until either:
1. The ignition switch is turned OFF.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM