Page 3329 of 5883
AMBIENT SENSOR
HA-47
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AMBIENT SENSOR
Removal and Installation of Ambient Sensor - MR18DE, HR16DE and K9KINFOID:0000000001696506
NOTE:
Vehicles with automatic A/C systems and manual A/C system with a PTC heater are equipped with a ambient
sensor.
REMOVAL
1. Remove the front grille. Refer to EXT-19, "Removal and Installation".
2. Disconnect the ambient sensor connector (1), and then remove
the ambient sensor (2).
INSTALLATION
Installation is in the reverse order of removal.
ALIIA0209ZZ
Page 3330 of 5883

HA-48
< ON-VEHICLE REPAIR >
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
Removal and Installation of Refrigerant Pressure Sensor - MR18DE, HR16DE
INFOID:0000000001527644
REMOVAL
1. Use the recovery/recycling equipment to evacuate the refrigerant. Refer to HA-21, "HFC-134a (R-134a)
Service Procedure".
2. Disconnect connector, and then remove refrigerant pressure
sensor (1) from condenser (2).
CAUTION:
When working, be careful not to damage the condenser
fins.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Replace O-rings of refrigerant pressure sensor with a new one, and apply compressor oil when
installing.
When charging the refrigerant, check for leaks. Refer to HA-22, "
Checking of Refrigerant Leaks".
Removal and Installation of Refrigerant Pressure Sensor - K9KINFOID:0000000001527628
REMOVAL
1. Use the recovery/recycling equipment to evacuate the refrigerant. Refer to HA-21, "HFC-134a (R-134a)
Service Procedure".
2. Remove the air duct (front).
3. Remove the radiator core support finisher.
4. Remove the front grille. Refer to EXT-19, "
Removal and Installation".
5. Reposition the LH air guide out of the way.
6. Disconnect the refrigerant pressure sensor connector and
remove the refrigerant pressure sensor (1) from the liquid tank
on the condenser.
CAUTION:
Do not damage the condenser fins.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Replace the O-ring of the refrigerant pressure sensor with a new one, and apply compressor oil
when installing.
When charging the refrigerant, check for leaks. Refer to HA-22, "
Checking of Refrigerant Leaks".
SJIA0681E
ALIIA0004ZZ
Page 3331 of 5883

EXPANSION VALVE
HA-49
< ON-VEHICLE REPAIR >
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EXPANSION VALVE
Removal and Installation of Expansion Valve - MR18DE, HR16DE and K9K
INFOID:0000000001527645
REMOVAL
1. Use the recovery/recycling equipment to evacuate the refrigerant. Refer to HA-21, "HFC-134a (R-134a)
Service Procedure".
2. Remove cowl top cover. Refer to EXT-20, "
Removal and Installation".
3. Remove lower dash insulator.
4. Disconnect low-pressure flexible hose and high-pressure pipe from evaporator. Refer to HA-27, "
Compo-
nent".
5. Remove expansion valve bolts (A), and then remove expansion
valve (1).
CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Replace O-rings of evaporator with new ones, and apply compressor oil when installing.
When charging the refrigerant, check for leaks. Refer to HA-22, "
Checking of Refrigerant Leaks".
SJIA0683E
Page 3332 of 5883

HA-50
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
MR18DE EngineINFOID:0000000001396455
Compressor
Oil
Refrigerant
HR16DE EngineINFOID:0000000001396456
Compressor
Oil
Refrigerant
K9K EngineINFOID:0000000001396457
Compressor
ModelCR-10
Ty p eVanes rotary (5 vanes)
Displacement
cm
3 (in3 ) / revolutionMaximum 96 (5.86)
Direction of rotation Clockwise (viewed from drive end)
Drive beltPoly-V Ribbed Belt (6-Groove)
Ty p eNISSAN A/C System Oil Type R
Capacity
m (US fl oz, lmp fl oz)Total in system 120 (4.1, 4.2)
Compressor (service part) charg-
ing amountRefer to HA-19, "
Maintenance of Oil Quantity in Compressor".
Ty p eHFC-134a (R-134a)
Capacity
kg (lb)0.45 ± 0.05 (0.99 ± 0.11)
ModelCR-10
Ty p eVane rotary (5 vanes)
Displacement
cm
3 (in3 ) / revolutionMaximum 96 (5.86)
Direction of rotation Clockwise (viewed from drive end)
Drive beltPoly-V Ribbed Belt (7-Groove)
Ty p eNISSAN A/C System Oil Type R
Capacity
m (US fl oz, lmp fl oz)Total in system 120 (4.1, 4.2)
Compressor (service part) charg-
ing amountRefer to HA-19, "
Maintenance of Oil Quantity in Compressor".
Ty p eHFC-134a (R-134a)
Capacity
kg (lb)0.45 ± 0.05 (0.99 ± 0.11)
ModelXXXXX
Ty p eVariable displacement swash plate
Displacement
cm
3 (in3 ) / revolutionMaximum XXX (XXXX)
Page 3333 of 5883
SERVICE DATA AND SPECIFICATIONS (SDS)
HA-51
< SERVICE DATA AND SPECIFICATIONS (SDS)
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Oil
Refrigerant
Direction of rotation Clockwise (viewed from drive end)
Drive beltPoly-V Ribbed Belt (6-Groove)
Typ eNISSAN A/C System Oil Type S
Capacity
m (US fl oz, lmp fl oz)Total in system 100 (3.4, 3.5)
Compressor (service part) charg-
ing amountRefer to HA-19, "
Maintenance of Oil Quantity in Compressor".
Typ eHFC-134a (R-134a)
Capacity
kg (lb)0.45 ± 0.05 (0.99 ± 0.11)
Page 3334 of 5883

HAC-1
VENTILATION, HEATER & AIR CONDITIONER
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CONTENTS
HEATER & AIR CONDITIONING CONTROL SYSTEM
MANUAL AIR CONDITIONER
BASIC INSPECTION ....................................
5
DIAGNOSIS AND REPAIR WORKFLOW ..........5
How to Perform Trouble Diagnosis For Quick and
Accurate Repair ........................................................
5
INSPECTION AND ADJUSTMENT .....................6
Operational Check ....................................................6
FUNCTION DIAGNOSIS ...............................8
FUNCTION INFORMATION ................................8
Component Part Location .........................................8
REFRIGERATION SYSTEM ..............................10
Refrigerant Cycle ....................................................10
Refrigerant System Protection ................................10
AIR CONDITIONER CONTROL .........................11
System Diagram ......................................................11
System Description .................................................11
Discharge Air Flow ..................................................11
Switches And Their Control Function ......................12
Component Description ...........................................13
CAN COMMUNICATION SYSTEM ....................14
System Description .................................................14
DIAGNOSIS SYSTEM (BCM) ............................15
CONSULT-III Function (BCM) .................................15
COMPONENT DIAGNOSIS .........................16
MODE DOOR .....................................................16
Mode Door Diagnostic Procedure ...........................16
AIR MIX DOOR ...................................................17
Air Mix Door Diagnostic Procedure .........................17
INTAKE DOOR ...................................................18
Intake Door Diagnostic Procedure ..........................18
BLOWER MOTOR ............................................19
Front Blower Motor Component Function Check ....19
Front Blower Motor Diagnosis Procedure ................19
MAGNET CLUTCH ...........................................23
System Description ..................................................23
Magnet Clutch Component Function Check ............23
Magnet Clutch Diagnosis Procedure .......................24
INTAKE SENSOR .............................................30
Component Inspection .............................................30
Intake Sensor Diagnosis Procedure ........................30
Intake Sensor Component Inspection .....................31
PTC HEATER CONTROL SYSTEM .................33
PTC HEATER (300 WATT) ........................................33
PTC HEATER (300 WATT) : PTC Heater System
Description ...............................................................
33
PTC HEATER (300 WATT) : PTC Heater Compo-
nent Description .......................................................
34
PTC HEATER (300 WATT) : PTC Heater (300
Watt) Diagnosis Procedure ......................................
35
PTC HEATER (300 WATT) : PTC Heater (300
Watt) Component Inspection ...................................
41
PTC HEATER (1500 WATT) ......................................43
PTC HEATER (1500 WATT) : System Description ....43
PTC HEATER (1500 WATT) : Component De-
scription ...................................................................
44
PTC HEATER (1500 WATT) : PTC Heater (1500
Watt) Diagnosis Procedure ......................................
45
PTC HEATER (1500 WATT) : PTC Heater (1500
Watt) Component Inspection ...................................
50
ECU DIAGNOSIS .........................................53
AIR CONDITIONER CONTROL ........................53
Reference Value ......................................................53
Wiring Diagram - Heater Control (without A/C) - .....54
Wiring Diagram - Air Conditioner Control - ..............56
Page 3335 of 5883

HAC-2
PTC HEATER CONTROL SYSTEM ..................63
PTC HEATER (300 WATT) .......................................63
PTC HEATER (300 WATT) : Wiring Diagram -
PTC Heater (300 Watt) - .........................................
63
PTC HEATER (1500 WATT) .....................................67
PTC HEATER (1500 WATT) : Wiring Diagram -
PTC Heater (1500 Watt) - .......................................
68
SYMPTOM DIAGNOSIS .............................72
AIR CONDITIONER CONTROL ........................72
Symptom Matrix Chart ..........................................72
INSUFFICIENT COOLING .................................73
Component Function Check ...................................73
Performance Test Diagnoses .................................74
Performance Chart .................................................75
Test Reading ..........................................................76
Trouble Diagnoses for Unusual Pressure ...............77
INSUFFICIENT HEATING .................................81
Component Function Check ...................................81
NOISE ................................................................83
Component Function Check ...................................83
PRECAUTION .............................................84
PRECAUTIONS .................................................84
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
84
Precaution for Procedures Without Cowl Top Cov-
er ............................................................................
84
Working with HFC-134a (R-134a) ..........................84
Precaution for Service Equipment ..........................85
AUTO AIR CONDITIONER (W/O NAVI)
BASIC INSPECTION ...................................
86
DIAGNOSIS AND REPAIR WORKFLOW .........86
How to Perform Trouble Diagnosis For Quick And
Accurate Repair ......................................................
86
INSPECTION AND ADJUSTMENT ...................87
Operational Check ..................................................87
FUNCTION DIAGNOSIS .............................89
FUNCTION INFORMATION ..............................89
Component Part Location .......................................89
REFRIGERATION SYSTEM ..............................91
Refrigerant Cycle ....................................................91
Refrigerant System Protection ................................91
AUTOMATIC AIR CONDITIONER SYSTEM .....92
Control System Diagram ........................................92
Control System Description ....................................92
Discharge Air Flow .................................................94
Switches And Their Control Function ......................95
CAN COMMUNICATION SYSTEM ...................96
System Description .................................................96
DIAGNOSIS SYSTEM (BCM) ............................97
CONSULT-III Function (BCM) ................................97
SELF-DIAGNOSIS FUNCTION .........................98
Front Air Control Self-Diagnosis .............................98
A/C System Self-Diagnosis Code Chart ...............104
COMPONENT DIAGNOSIS ......................106
MODE DOOR MOTOR .....................................106
System Description ...............................................106
Mode Door Motor Component Function Check ....107
Mode Door Motor Diagnosis Procedure ................109
AIR MIX DOOR MOTOR ..................................110
System Description ...............................................110
Air Mix Door Motor Component Function Check ..111
Air Mix Door Motor Diagnosis Procedure ..............112
INTAKE DOOR MOTOR ...................................114
System Description ...............................................114
Intake Door Motor Component Function Check ....115
Intake Door Motor Diagnosis Procedure ...............116
BLOWER MOTOR CONTROL SYSTEM .........118
System Description ...............................................118
Front Blower Motor Component Function Check ..119
Front Blower Motor Diagnosis Procedure .............120
Front Blower Motor Component Inspection ..........123
MAGNET CLUTCH ...........................................124
System Description ...............................................124
Magnet Clutch Component Function Check .........124
Magnet Clutch Diagnosis Procedure ....................125
AMBIENT SENSOR ..........................................130
Component Description ........................................130
Ambient Sensor Diagnosis Procedure ..................130
Ambient Sensor Component Inspection ...............131
IN-VEHICLE SENSOR ......................................133
Component Description ........................................133
In-Vehicle Sensor Diagnosis Procedure ...............133
In-Vehicle Sensor Component Inspection .............135
SUNLOAD SENSOR ........................................136
System Description ...............................................136
Sunload Sensor Diagnosis Procedure ..................136
Sunload Component Inspection ............................137
INTAKE SENSOR .............................................139
Component Inspection ..........................................139
Intake Sensor Diagnosis Procedure .....................139
Intake Sensor Component Inspection ...................140
PTC HEATER CONTROL SYSTEM .................142
Page 3336 of 5883

HAC-3
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142
PTC HEATER (300 WATT) : PTC Heater System
Description ............................................................
142
PTC HEATER (300 WATT) : PTC Heater Compo-
nent Description ....................................................
143
PTC HEATER (300 WATT) : PTC Heater (300
Watt) Diagnosis Procedure ...................................
144
PTC HEATER (300 WATT) : PTC Heater (300
Watt) Component Inspection .................................
151
PTC HEATER (1500 WATT) ...................................153
PTC HEATER (1500 WATT) : System Description ..153
PTC HEATER (1500 WATT) : Component De-
scription .................................................................
154
PTC HEATER (1500 WATT) : PTC Heater (1500
Watt) Diagnosis Procedure ...................................
155
PTC HEATER (1500 WATT) : PTC Heater (1500
Watt) Component Inspection .................................
160
POWER SUPPLY AND GROUND CIRCUIT
FOR CONTROLLER ........................................
163
Component Description .........................................163
Front Air Control Component Function Check ......163
Front Air Control Power and Ground Diagnosis
Procedure ..............................................................
163
ECU DIAGNOSIS .......................................165
AIR CONDITIONER CONTROL .......................165
Front Air Control Terminals Reference Values .....165
Wiring Diagram - Air Conditioner Control - ............167
PTC HEATER CONTROL SYSTEM ................175
PTC HEATER (300 WATT) .....................................175
PTC HEATER (300 WATT) : Wiring Diagram -
PTC Heater (300 Watt) - .......................................
175
PTC HEATER (1500 WATT) ...................................179
PTC HEATER (1500 WATT) : Wiring Diagram -
PTC Heater (1500 Watt) - .....................................
180
SYMPTOM DIAGNOSIS ............................184
AIR CONDITIONER CONTROL .......................184
Symptom Matrix Chart .........................................184
INSUFFICIENT COOLING ...............................185
Component Function Check ..................................185
Performance Test Diagnoses ................................186
Performance Chart ................................................188
Test Reading .........................................................189
Trouble Diagnoses for Unusual Pressure .............189
INSUFFICIENT HEATING ................................193
Component Function Check ..................................193
NOISE ...............................................................195
Component Function Check ..................................195
SELF-DIAGNOSIS CANNOT BE PER-
FORMED ..........................................................
197
Self-Diagnosis .......................................................197
MEMORY FUNCTION DOES NOT OPERATE .198
Memory Function Check ........................................198
PRECAUTION ............................................199
PRECAUTIONS ...............................................199
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...............................................................
199
Precaution for Procedures Without Cowl Top Cov-
er ...........................................................................
199
Working with HFC-134a (R-134a) .........................199
Precaution for Service Equipment .........................200
AUTO AIR CONDITIONER (W/NAVI)
BASIC INSPECTION .................................
201
DIAGNOSIS AND REPAIR WORKFLOW ......201
How to Perform Trouble Diagnosis For Quick And
Accurate Repair .....................................................
201
INSPECTION AND ADJUSTMENT ................202
Operational Check .................................................202
FUNCTION DIAGNOSIS ............................204
FUNCTION INFORMATION ............................204
Component Part Location ......................................204
REFRIGERATION SYSTEM ...........................206
Refrigerant Cycle ...................................................206
Refrigerant System Protection ...............................206
AUTOMATIC AIR CONDITIONER SYSTEM ..207
Control System Diagram .......................................207
Control System Description ...................................207
Discharge Air Flow ................................................208
Switches And Their Control Function ....................209
CAN COMMUNICATION SYSTEM .................211
System Description ................................................211
DIAGNOSIS SYSTEM (BCM) .........................212
CONSULT-III Function (BCM) ...............................212
SELF-DIAGNOSIS FUNCTION .......................213
Front Air Control Self-Diagnosis ............................213
Front Air Control Self-Diagnosis Code Chart .........218
COMPONENT DIAGNOSIS .......................219
MODE DOOR MOTOR ....................................219
System Description ................................................219
Mode Door Motor Component Function Check .....220
Mode Door Motor Diagnosis Procedure ................222
AIR MIX DOOR MOTOR .................................224
System Description ................................................224
Air Mix Door Motor Component Function Check ...225
Air Mix Door Motor Diagnosis Procedure ..............226