Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Pathfinder 2008-2009 Approved Nissan Pathfinder 2008 HAC
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VENTILATION, HEATER & AIR CONDITIONER
A
HEATER & AIR CONDITIONING CONTROL SYSTEM
SECTION HAC B
C
D
E
CONTENTS
AUTOMATIC AIR CONDITIONER COMPONENT DIAGNOSIS ........................ 25
. F
BASIC INSPECTION ................................... 4
. MODE DOOR MOTOR ...................................... 25
System Description .................................................25 . G
DIAGNOSIS AND REPAIR WORKFLOW ......... 4
. Mode Door Motor (Front) Component Function
How to Perform Trouble Diagnosis For Quick And Check .....................................................................26
.
Accurate Repair ....................................................... 4
. Mode Door Motor (Front) Diagnosis Procedure .....27 .
H
INSPECTION AND ADJUSTMENT .................... 5
. AIR MIX DOOR MOTOR ................................... 31
Operational Check (Front) ........................................ 5
. System Description .................................................31 .
Operational Check (Rear) ........................................ 6
. Air Mix Door Motor Component Function Check ....32 HAC
Air Mix Door Motor (Driver) Diagnosis Procedure....33
FUNCTION DIAGNOSIS .............................. 8
. Air Mix Door Motor (Passenger) Diagnosis Proce-
FUNCTION INFORMATION ............................... 8
. dure ........................................................................37
.
J
Component Part Location ........................................ 8
. INTAKE DOOR MOTOR ................................... 41
Symptom Table ...................................................... 11
. System Description .................................................41
.
REFRIGERATION SYSTEM .............................13
. Intake Door Motor Component Function Check .....42 . K
Refrigerant Cycle ................................................... 13
. Intake Door Motor Diagnosis Procedure ................43 .
Refrigerant System Protection ............................... 13 . BLOWER MOTOR CONTROL SYSTEM .......... 45
L
AUTOMATIC AIR CONDITIONER SYSTEM ....14 System Description .................................................45 .
Front Blower Motor Component Function Check ....46
Control System Diagram ........................................ 14
.
Front Blower Motor Diagnosis Procedure ...............47 .
Control System Description .................................... 14
.
Front Blower Motor Component Inspection ............50 . M
Discharge Air Flow (Front) ..................................... 17
.
Rear Blower Motor Description ...............................51 .
Switches And Their Control Function (Front) ......... 18 .
Rear Blower motor Component Function Check ....52
Switches And Their Control Function (Rear) .......... 19 .
Rear Air Control (Front) Diagnosis Procedure #1....53 N
CAN COMMUNICATION SYSTEM ...................20
. Rear Air Control (Rear) Diagnosis Procedure #2 ....54
System Description ................................................ 20
. Rear Air Control (Rear) Diagnosis Procedure #3 ....55
Rear Air Control (Rear) Diagnosis Procedure #4 ....58
DIAGNOSIS SYSTEM (HVAC) .........................21
. O
Rear Blower Motor And Relay Component Inspec-
CONSULT-III Function (HVAC) .............................. 21
. tion ..........................................................................59
.
DIAGNOSIS SYSTEM (BCM) ...........................22
. REAR AIR CONTROL SYSTEM ....................... 61 P
CONSULT-III Function (BCM) ................................ 22
. Rear Air Control System Description ......................61
.
Rear Air Control Component Function Check ........61 .
SELF-DIAGNOSIS FUNCTION .........................23
. Rear Air Control (Front) Diagnosis Procedure ........62
.
A/C Auto Amp. Self-Diagnosis ............................... 23
. Rear Air Control (Rear) Diagnosis Procedure ........64.
A/C and AV Switch Assembly Self-Diagnosis ........ 23 .
A/C System Self-Diagnosis Code Chart ................. 24
. MAGNET CLUTCH ........................................... 67
System Description .................................................67
.
HAC-1
Magnet Clutch Component Function Check .......... 67. MEMORY FUNCTION DOES NOT OPERATE.. 119
Magnet Clutch Diagnosis Procedure ..................... 68
. Memory Function Check ...................................... 119
.
WATER VALVE CIRCUIT ................................. 72
. PRECAUTION ........................................... 120
Water Valve Description (VK56DE) ....................... 72
.
Water Valve Diagnosis Procedure (VK56DE) ........ 72 . PRECAUTIONS ............................................... 120
.
Supplemental Restraint System (SRS) "AIR BAG"
HEATER PUMP ................................................ 74
. and "SEAT BELT PRE-TENSIONER" ................. 120 .
System Description (VQ40DE) .............................. 74
. Working with HFC-134a (R-134a) ........................ 120
.
Diagnosis Procedure (VQ40DE) ............................ 74
. Precaution for Service Equipment ....................... 121
.
Component Inspection (VQ40DE) ......................... 76
. MANUAL AIR CONDITIONER
AMBIENT SENSOR .......................................... 77
. BASIC INSPECTION ................................. 122
Component Description ......................................... 77
.
Ambient Sensor Diagnosis Procedure ................... 77 . DIAGNOSIS AND REPAIR WORKFLOW ....... 122
.
Ambient Sensor Component Inspection ................ 78 . How to Perform Trouble Diagnosis For Quick And
Accurate Repair ................................................... 122
.
IN-VEHICLE SENSOR ...................................... 80
.
Component Description ......................................... 80
. INSPECTION AND ADJUSTMENT ................. 123
.
In-Vehicle Sensor Diagnosis Procedure ................ 80 . Operational Check ............................................... 123
.
In-Vehicle Sensor Component Inspection ............. 82 .
FUNCTION DIAGNOSIS ........................... 125
OPTICAL SENSOR .......................................... 83
.
Component Description ......................................... 83
. FUNCTION INFORMATION ............................ 125
.
Optical Sensor Diagnosis Procedure ..................... 83 . Component Part Location .................................... 125 .
Symptom Table .................................................... 127
.
INTAKE SENSOR ............................................. 85
.
System Description ................................................ 85
. REFRIGERATION SYSTEM ............................ 128
.
Intake Sensor Diagnosis Procedure ...................... 85 . Refrigerant Cycle ................................................. 128
.
Intake Sensor Component Inspection ................... 86 . Refrigerant System Protection ............................. 128 .
POWER SUPPLY AND GROUND CIRCUIT MANUAL AIR CONDITIONER SYSTEM ........ 129
.
FOR CONTROLLER ......................................... 87
. Control System Diagram ...................................... 129.
Component Description ......................................... 87 . Control System Description ................................. 129 .
A/C Auto Amp. Component Function Check ......... 87 . Discharge Air Flow ............................................... 131
.
A/C Auto Amp Power and Ground Diagnosis Pro- Switches And Their Control Function ................... 131 .
cedure .................................................................... 88
.
CAN COMMUNICATION SYSTEM ................. 133
.
ECU DIAGNOSIS ....................................... 89
. System Description .............................................. 133
.
AIR CONDITIONER CONTROL ....................... 89
. DIAGNOSIS SYSTEM (BCM) .......................... 134
.
A/C Auto Amp. Terminals Reference Values ........ 89 . CONSULT-III Function (BCM) ............................. 134
.
Wiring Diagram ...................................................... 91
.
COMPONENT DIAGNOSIS ...................... 135
SYMPTOM DIAGNOSIS ........................... 106
.
MODE DOOR MOTOR .................................... 135
.
AIR CONDITIONER CONTROL ..................... 106
. System Description .............................................. 135 .
Symptom Matrix Chart ........................................106
. Mode Door Motor (Front) Component Function
Check ................................................................... 135
.
INSUFFICIENT COOLING .............................. 107
. Mode Door Motor (Front) Diagnosis Procedure ... 136 .
Component Function Check .................................107 .
Performance Test Diagnoses ...............................108 . AIR MIX DOOR MOTOR ................................. 139
.
Performance Chart ...............................................110
. System Description .............................................. 139
.
Test Reading ........................................................111
. Air Mix Door Motor Component Function Check . 140
Trouble Diagnoses for Unusual Pressure .............112 . Air Mix Door Motor Diagnosis Procedure ............. 141 .
INSUFFICIENT HEATING .............................. 115
. INTAKE DOOR MOTOR .................................. 143
.
Component Function Check .................................115
. System Description .............................................. 143
.
Intake Door Motor Component Function Check ... 143 .
NOISE ............................................................. 117
. Intake Door Motor Diagnosis Procedure .............. 144 .
Component Function Check .................................117
.
BLOWER MOTOR ........................................... 146
.
HAC-2
System Description .............................................. 146
. Wiring Diagram ..................................................... 164
.
Front Blower Motor Component Function Check .. 146 A
Front Blower Motor Diagnosis Procedure ............ 147 . SYMPTOM DIAGNOSIS ........................... 171
.
Front Blower Motor Component Inspection .......... 151 .
AIR CONDITIONER CONTROL ...................... 171
MAGNET CLUTCH .......................................... 152
. Symptom Matrix Chart ........................................ 171
. B
System Description .............................................. 152
.
Magnet Clutch Component Function Check ........ 152 .
INSUFFICIENT COOLING .............................. 172
Component Function Check ................................. 172 . C
Magnet Clutch Diagnosis Procedure .................... 152 .
Performance Test Diagnoses ............................... 173 .
INTAKE SENSOR ........................................... 157
. Performance Chart ............................................... 175
.
System Description .............................................. 157
. Test Reading ........................................................ 176
.
Trouble Diagnoses for Unusual Pressure ............. 177 . D
Intake Sensor Diagnosis Procedure ..................... 157 .
Intake Sensor Component Inspection .................. 158 .
INSUFFICIENT HEATING ............................... 181
POWER SUPPLY AND GROUND CIRCUIT Component Function Check ................................. 181
. E
FOR CONTROLLER ....................................... 159
.
NOISE .............................................................. 183
Component Description ........................................ 159 .
Component Function Check ................................. 183
.
Front Air Control Component Function Check ..... 159 . F
Front Air Control Power and Ground Diagnosis PRECAUTION ........................................... 185
.
Procedure ............................................................. 160
.
PRECAUTIONS ............................................... 185
ECU DIAGNOSIS ...................................... 161
. G
Supplemental Restraint System (SRS) "AIR BAG"
and "SEAT BELT PRE-TENSIONER" .................. 185 .
AIR CONDITIONER CONTROL ...................... 161
.
Working with HFC-134a (R-134a) ........................ 185
.
System Description .............................................. 161
. H
Precaution for Service Equipment ........................ 186
.
System Operation ................................................ 161
.
Front Air Control Terminals Reference Values .... 162 .
HAC
J
K
L
M
N
O
P
HAC-3
DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [AUTOMATIC AIR CONDITIONER]
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
How to Perform Trouble Diagnosis For Quick And Accurate Repair INFOID:0000000001366682
WORK FLOW
1.LISTEN TO CUSTOMER COMPLAINT
Listen to customer complaint. Get detailed information about the conditions and environment when the symp-
tom occurs.
>> GO TO 2
2.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.VERIFY THE SYMPTOM WITH OPERATIONAL CHECK
Verify the symptom with operational check. Refer to HAC-123, "Operational Check".
Can a symptom be duplicated?
YES >> GO TO 4
NO >> GO TO 5
4.GO TO APPROPRIATE TROUBLE DIAGNOSIS
Go to appropriate trouble diagnosis. Refer to HAC-171, "Symptom Matrix Chart".
Can a symptom be duplicated?
>> GO TO 5.
5.PERFORM THE A/C AUTO AMP SELF-DIAGNOSIS
Perform A/C auto amp. self-diagnosis. Refer to HAC-23, "A/C Auto Amp. Self-Diagnosis".
>> If any diagnostic trouble codes set. Refer to HAC-24, "A/C System Self-Diagnosis Code Chart".
>> Confirm the repair by performing operational check. Refer to HAC-123, "Operational Check".
HAC-4
INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [AUTOMATIC AIR CONDITIONER]
INSPECTION AND ADJUSTMENT
A
Operational Check (Front) INFOID:0000000001366683
The purpose of the operational check is to confirm that the system operates properly. B
Conditions : Engine running and at normal operating temperature
CHECKING MEMORY FUNCTION C
1. Set the temperature to 32◦ Jabse Service Manual Search 2025 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo