2014 NISSAN TEANA engine

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

DIAGNOSIS SYSTEM (A/C AUTO AMP.)HAC-27
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONER]
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NOTE:
Perform the inspection of each output device after starting the engine, because the A/C compressor has been operating.
CONFIGURATION
Configuration includes the following functions.
CAUTION:
Use ‘‘Manual Configuration’’ only when ‘‘TY PE ID’’ of A/C auto amp. cannot be read.
Blower motor duty ratio 30% 30% 60% HI HI 60% HI
A/C compressor (Mag-
net clutch) ON ON ON OFF OFF ON ON
ECV duty 100% 100% 50% 0% 0% 100% 100% Te s t i t e m
MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7
Function Description
Read/Write Configuration Before replacing ECU
Allows the reading of vehicle specification (Type ID) written in A/C
auto amp. to store the specification in CONSULT.
After replacing ECU Allows the writing of vehicle information (Type ID) stored in CON-
SULT into the A/C auto amp.
Manual Configuration Allows the writing of vehicle specification (Type ID) into the A/C
auto amp. by hand.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-28
< ECU DIAGNOSIS INFORMATION >[AUTOMATIC AIR CONDITIONER]
A/C AUTO AMP.
ECU DIAGNOSIS INFORMATION
A/C AUTO AMP.
Reference ValueINFOID:0000000009463104
VALUES ON THE DIAGNOSIS TOOL
TERMINAL LAYOUT
PHYSICAL VALUES
Monitor item Condition Value/Status
AMB TEMP SEN Ignition switch ON — 22 - 131 °F ( −30 - 55 °C)
IN-VEH TEMP Ignition switch ON — 22 - 131 °F ( −30 - 55 °C)
INT TEMP SEN Ignition switch ON — 22 - 131 °F ( −30 - 55 °C)
SUNLOAD SEN Ignition switch ON — 0 - 1395 w/m
2
(0 - 1200 kcal/m2·h)
AMB SEN CAL Ignition switch ON — 22 -131 °F ( −30 - 55 °C)
IN-VEH CAL Ignition switch ON — 22 -131 °F ( −30 - 55 °C)
INT TEMP CAL Ignition switch ON — 22 -131 °F ( −30 - 55 °C)
SUNL SEN CAL Ignition switch ON — 0 - 1395 w/m
2
(0 - 1200 kcal/m2·h)
COMP REQ SIG Engine: Run at idle after
warming up A/C switch: ON
(A/C compressor operation
status) On
A/C switch: OFF Off
FAN REQ SIG Engine: Run at idle after
warming up Blower fan: ON On
Blower fan: OFF Off
FAN DUTY Engine: Run at idle after
warming up Blower fan: ON 25 - 85%
Blower fan: OFF 0%
XM Ignition switch ON — −100 - 155
PA TARGET A/TEMP Ignition switch ON — Value according to target air
flow temperature (passen-
ger side)
ENG COOL TEMP Ignition switch ON — Values according to coolant
temperature
VEHICLE SPEED Driving — Equivalent to speedometer
reading
ALIIA0579ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-48
< BASIC INSPECTION >[AUTOMATIC AIR CONDITIONER]
OPERATION INSPECTION
OPERATION INSPECTION
Work ProcedureINFOID:0000000009463110
DESCRIPTION
The purpose of the operational check is to che
ck that the individual system operates normally.
INSPECTION PROCEDURE
1.CHECK MEMORY FUNCTION
1. Start the engine.
2. Operate the temperature control switch (drive r side) and raise the temperature setting to 32°C (90 °F).
3. Press the OFF switch.
4. Turn the ignition switch OFF.
5. Turn the ignition switch ON.
6. Press the AUTO switch.
7. Check that the temperature setting, before turning the ignition switch OFF, is stored.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check power and ground circuits for A/C auto amp. Refer to HAC-78, "A/C AUTO AMP. : Diagno-
sis Procedure".
2.CHECK BLOWER MOTOR SPEED
1. Operate the fan control dial. Check that the fan speed changes.
2. Check the operation for all fan speeds.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check blower motor system. Refer to HAC-84, "Diagnosis Procedure"
.
3.CHECK DISCHARGE AIR (MODE SWITCH AND DEF SWITCH)
1. Press the MODE switch and the DEF switch.
2. Check that the air outlets change according to each i ndicated air outlet by placing a hand in front of the
outlets. Refer to HAC-13, "System Description"
.
NOTE:
Confirm that the A/C compressor clutch is engaged (sound or visual inspection) and intake door position is at
FRE ( ) when the D/F ( ) or DEF ( ) is selected.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check mode door system. Refer to HAC-80, "MODE DOOR MOTOR : Diagnosis Procedure"
.
4.CHECK INTAKE AIR
1. Press the REC ( ) switch. Indicator is turned ON.
2. Press the FRE ( ) switch. Indicator is turned ON.
3. Listen for the intake door position change. (Slight change of blower sound can be heard.)
NOTE:
Confirm that the A/C compressor clutch is engaged (sound or visual inspection) and the FRE ( ) switch is
pressed when the D/F ( ) or DEF ( ) is selected.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Check intake door system. Refer to HAC-81, "INTAKE DOOR MOTOR : Diagnosis Procedure"
.
5.CHECK A/C SWITCH
1. Press the A/C switch.
2. The A/C switch indicator is turned ON.
Confirm that the A/C compressor clutch engages (sound or visual inspection).
Is the inspection result normal?
Conditions : Engine running at normal operating temperature
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

OPERATION INSPECTIONHAC-49
< BASIC INSPECTION > [AUTOMATIC AIR CONDITIONER]
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YES >> GO TO 6.
NO >> Check magnet clutch system. Refer to HAC-87, "Diagnosis Procedure"
.
6.CHECK TEMPERATURE DECREASE
1. Operate the A/C compressor.
2. Operate the temperature control switch (drive r side) and lower the temperature setting to 18°C (60 °F).
3. Check that the cool air blows from the outlets.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Check for insufficient cooling. Refer to HAC-96, "Diagnosis Procedure"
.
7.CHECK TEMPERATURE INCREASE
1. Operate the temperature control switch (drive r side) and raise the temperature setting to 32°C (90 °F) after
warming up the engine.
2. Check that the warm air blows from the outlets.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Check for insufficient heating. Refer to HAC-98, "Diagnosis Procedure"
.
8.CHECK DUAL MODE FUNCTION
1. Press the DUAL mode switch, and then check that “DUAL” is shown on the display.
2. Operate the temperature control switch (driver si de). Check that the discharge air temperature (driver
side) changes.
3. Operate the temperature control switch (passenger side). Check that the discharge air temperature (pas-
senger side) changes.
4. Press the DUAL mode switch, and then check that the temperature setting (driver/passenger) is unified to
the driver side temperature setting.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Refer to HAC-94, "Diagnosis Chart By Symptom"
and perform the appropriate diagnosis.
9.CHECK AUTO MODE
1. Press the AUTO switch, and then check t hat “AUTO” is shown on the display.
2. Operate the temperature control switch (driver side) . Check that the fan speed, outlet air or intake air
changes. The discharge air temperature or fan speed varies depending on the ambient temperature, in-
vehicle temperature, and temperature setting.
Is the inspection result normal?
YES >> Inspection End
NO >> Refer to HAC-94, "Diagnosis Chart By Symptom"
and perform the appropriate diagnosis.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HEATER AND AIR CONDITIONING SYSTEM CONTROL SYMPTOMS
HAC-95
< SYMPTOM DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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• Insufficient cooling.
• No cool air comes out. (Air flow volume is normal.) • Magnet clutch control system
• Drive belt slipping
• Refrigerant cycle
• ECV (electrical control valve)
• Air leakage from each duct
• A/C auto amp. connection recogni- tion signal circuit
• Temperature setting trimmer (front)HAC-96, "Diagnosis Procedure"
• Insufficient heating.
• No warm air comes out. (Air flow volume is nor- mal.) • Engine cooling system
• Heater hose
• Heater core
• Air leakage from each duct
• Temperature setting trimmer (front)HAC-98, "Diagnosis Procedure"
Noise is heard when front
air conditioning system op-
erates. During compressor
operation Refrigerant cycle
HA-18, "Symptom Table"
During front blower
motor operation • Mixing any foreign object in front
blower motor
• Front blower motor fan breakage
• Front blower motor rotation inferiori-
ty HAC-85, "Component Inspection
(Blower Motor)"
• Memory function does not operate.
• Setting temperature is not memorized. • Battery power supply system of A/C
auto amp.
• A/C auto amp. HAC-78, "A/C AUTO AMP. : Diag-
nosis Procedure"
Symptom Corresponding malfunction part Reference
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-98
< SYMPTOM DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
INSUFFICIENT HEATING
INSUFFICIENT HEATING
DescriptionINFOID:0000000009463169
Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
Diagnosis ProcedureINFOID:0000000009463170
NOTE:
Perform self-diagnosis with CONSULT before performing symptom diagnosis. If DTC is detected, perform the
corresponding diagnosis.
1.CHECK COOLING SYSTEM
1. Check engine coolant level and check leakage. Refer to CO-11, "System Inspection"
(QR25DE) or CO-
35, "System Inspection" (VQ35DE).
2. Check reservoir tank cap. Refer to CO-11, "System Inspection"
(QR25DE) or CO-35, "System Inspection"
(VQ35DE).
3. Check water flow sounds of the engine coolant. Refer to CO-11, "System Inspection"
(QR25DE) or CO-
35, "System Inspection" (VQ35DE).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Refill engine coolant and repair or repl ace parts depending on the inspection results.
2.CHECK HEATER HOSE
Check installation of heater hose visually or by touching.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace parts depending on the inspection results.
3.CHECK HEATER CORE
1. Check temperature of inlet hose and outlet hose of front heater core.
2. Check that inlet side of heater core is hot and the outle t side is slightly lower than/almost equal to the inlet
side.
CAUTION:
Always perform the temperature in spection in a short period of time because the engine coolant
temperature is very hot.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace heater core. Refer to HA-42, "HEATER CORE : Removal and Installation"
.
4.CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of front air conditioning system for air leakage.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace parts depending on the inspection results.
5.CHECK SETTING OF TEMPERATURE SETTING TRIMMER (FRONT)
1. Check setting value of temperature setting trimmer (front). Refer to HAC-50, "Temperature Setting Trim-
mer".
2. Check that temperature setting trimmer (front) is set to “ − direction”.
NOTE:
The control temperature can be set by t he temperature setting trimmer (front).
3. Set difference between the set temperature and control temperature to “0”.
Are the symptoms solved?
YES >> Inspection End.
NO >> Replace A/C auto amp. Refer to HAC-102, "Removal and Installation"
.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-100
< SYMPTOM DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
COMPRESSOR DOES NOT OPERATE
1. Start engine.
2. Check “AC COMP REQ” in “DATA MONITO R” mode of “IPDM E/R” using CONSULT.
Is the inspection result normal?
YES >> Inspection End.
NO >> Check CAN communication system. Refer to LAN-18, "Trouble Diagnosis Flow Chart"
.
Monitor item Condition Status
AC COMP REQ A/C switch ON On
OFF Off
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM