air conditioning NISSAN TEANA 2014 Service Manual

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

HAC-122
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONER]
OPERATION
OPERATION
Switch Name and FunctionINFOID:0000000009463202
Front Air Control
Switch Operation
1. A/C switch 2. Blower control dial (with OFF switch) 3. DEF switch
4. Rear DEF switch 5. REC switch 6. Temperature control dial
7. MAX A/C switch 8. D/F switch 9. FOOT switch
10. B/L switch 11. VENT switch
ALIIA0604ZZ
A/C switch Switches the compressor control switch indicator between ON
⇔ OFF with each press while front
blower fan is activated. The circuit used by the BCM to detect an A/C ON request is grounded.
NOTE:
When front blower fan is OFF, the compressor control cannot be activated.
Blower control dial (with
OFF switch) • Blower fan speed is manually controlled with the dial for varying blower speed. When ON, the circuit
used by the BCM to detect a fan ON request signal is grounded.
• Turns air conditioning system OFF.
NOTE:
When blower control dial is turned to any ON position the air conditioning system is activated. (Com-
pressor control state returns to the previous state before air conditioning system was turned OFF.)
DEF switch Switches DEF mode (switch indicator) between ON
⇔ OFF with each press.
• When DEF mode is turned ON, the air conditioning system changes to the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Manual setting.
- Compressor: ON
• When DEF mode is turned OFF, the air conditioning system state returns to the previous state be-
fore DEF mode was selected, but the following state is continued:
- Air inlet: Fresh air intake
- Compressor: ON
NOTE:
When front blower fan is OFF, DEF cannot be activated.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

OPERATIONHAC-123
< SYSTEM DESCRIPTION > [MANUAL AIR CONDITIONER]
C
D E
F
G H
J
K L
M A
B
HAC
N
O P
MAX A/C switch Switches the MAX A/C and compressor control switch indicators between ON
⇔ OFF with each press
while front blower fan is activated.
• When MAX A/C mode is turned ON, the air conditioning system changes to the following state.
- Air inlet: Recirculation air intake
- Air outlet: Manual setting
- Blower fan: Manual setting.
- Compressor: ON
• When MAX A/C mode is turned OFF, the air conditioning system state returns to the previous state
before MAX A/C mode is selected. But, the following state is changed:
- Air inlet: Fresh air intake
- Compressor: ON
NOTE:
When front blower fan is OFF, the compressor control cannot be activated.
MODE switches Selects air outlet from VENT, B/L, FOOT, and D/F.
NOTE:
When the air conditioning system is OFF, the air outlet can still be selected.
REC switch • Air inlet is selected to fresh air intake (REC) by pressing this switch.
- REC indicator: ON
NOTE:
• When the air conditioning system is OFF, the air inlet can still be selected.
• When D/F mode or DEF is selected, the REC button is disabled.
Temperature control dial • Selects desired temperature between full cold and full hot.
- Clockwise rotation: Temperature increases.
- Counterclockwise rotation: Temperature decreases.
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"
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

LAN
SYSTEMLAN-35
< SYSTEM DESCRIPTION > [CAN]
C
D E
F
G H
I
J
K L
B
A
O P
N
*1: QR25DE models
*2: VQ35DE models
*3: With automatic air conditioning system
*4: With manual air conditioning system
NOTE:
CAN data of the air bag diagnosis sensor unit is not used by usual service work, thus it is omitted.
Trunk switch signal R R R T
Turn indicator signal R R R T Signal name
ECM
EPS
IPDM-E TCM
M&A
STRG AV
AV M
HVAC ABS
BCM
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

PG
INSPECTION AND ADJUSTMENTPG-7
< BASIC INSPECTION >
C
D E
F
G H
I
J
K L
B
A
O P
N
INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN REMOVI
NG BATTERY NEGATIVE TERMINAL
ADDITIONAL SERVICE WHEN REMOVING BATTERY NEGATIVE TERMINAL : Spe-
cial Repair Requirement
INFOID:0000000009460434
Required Procedure After Battery Disconnection
System Item Reference
Engine Control System Idle Air Volume Learning EC-179
(QR25DE)
EC-683
(VQ35DE)
Power Window Control System Power Window System Initialization PWC-27
(LH Only Anti-Pinch)
PWC-93
(LH & RH Front Anti-Pinch)
Roof Moonroof Memory Reset/Initialization RF-20
Heater & Air Conditioning Control SystemTemperature Setting Trimmer
HAC-50
(Automatic Air Conditioner)
Foot Position Setting Trimmer HAC-50
(Automatic Air Conditioner)
Inlet Port Memory Function (FRE) HAC-50
(Automatic Air Conditioner)
Inlet Port Memory Function (REC) HAC-51
(Automatic Air Conditioner)
Target Evaporator Temp Upper Limit HAC-51
(Automatic Air Conditioner)
Audio, Visual & Navigation System Audio (Radio Preset) Refer to Owner's Manual.
Navigation System Refer to Owner's Manual.
Revision: November 20132014 Altima NAM

STC-22
< DTC/CIRCUIT DIAGNOSIS >
C1143 STEERING ANGLE SENSOR
DTC/CIRCUIT DIAGNOSIS
C1143 STEERING ANGLE SENSOR
DTC LogicINFOID:0000000009460356
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.DTC REPRODUCTION PROCEDURE
With CONSULT
1. Turn the ignition switch OFF to ON.
2. Perform PS self-diagnosis.
Is DTC C1143 detected?
YES >> Proceed to diagnosis procedure. Refer to STC-22, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000009460357
1.CHECK STEERING ANGLE SENSOR CIRCUIT
Check steering angle sensor circuit. Refer to BRC-88, "Diagnosis Procedure"
.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace malfunctioning component.
2.CHECK TERMINALS AND HARNESS CONNECTORS
Check the power steering control module pin termi nals for damage or loose connection with harness connec-
tor.
Is the inspection result normal?
YES >> Power steering control module is malfunctioni ng. Replace power steering oil pump assembly.
Refer to ST-38, "Removal and Installation"
.
NO >> Repair or replace malfunctioning component.
DTC Display item Malfunction detected condition Possible cause
C1143 ST ANG SEN CIRCUIT When a malfunction is detected in steering angle
sensor. • Harness or connector
• Steering angle sensor
• Power steering control mod-
ule
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

C1601 BATTERY POWER SUPPLYSTC-23
< DTC/CIRCUIT DIAGNOSIS >
C
D E
F
H I
J
K L
M A
B
STC
N
O P
C1601 BATTERY POWER SUPPLY
DTC LogicINFOID:0000000009460358
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.DTC REPRODUCTION PROCEDURE
With CONSULT
1. Turn the ignition switch OFF to ON.
2. Perform EPS self-diagnosis.
Is DTC
“C1601” detected?
YES >> Proceed to diagnosis procedure. Refer to STC-23, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000009460359
Regarding Wiring Diagram information, refer to STC-14, "Wiring Diagram".
1.CHECK POWER STEERING CONTROL MODULE GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power steering control module harness connector.
3. Check continuity between power steering control module harness connector terminal and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair open circuit or short to ground or short to power in harness or connectors, and repair or
replace the malfunctioning component.
2.CHECK POWER STEERING CONTROL MO DULE POWER SUPPLY CIRCUIT (1)
1. Check voltage between power steering control module harness connector terminals and ground.
2. Turn ignition switch ON. CAUTION:
Never start the engine.
3. Check voltage between power steering control module harness connector terminals and ground.
DTC Display item Malfunction detected condition Possible cause
C1601 BATTERY VOLT When a power supply voltage to the power steer-
ing control module is maintained at 18.5 V or more
or at less than 8.5 V continuously for 0.5 seconds
or more. • Harness or connector
• Power steering control mod-
ule
•Fuse
• Battery power supply circuit
•Battery
Power steering control module
—Continuity
Connector Terminal
E60 2 Ground Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM