Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Pathfinder 2008-2009 Approved Nissan Pathfinder 2009 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 MODE DOOR MOTOR ...................................... 26 F
System Description .................................................26 .
BASIC INSPECTION ................................... 4
. Mode Door Motor (Front) Component Function
Check .....................................................................27
. G
DIAGNOSIS AND REPAIR WORKFLOW ......... 4
. Mode Door Motor (Front) Diagnosis Procedure .....28 .
How to Perform Trouble Diagnosis For Quick And
Accurate Repair ....................................................... 4
. AIR MIX DOOR MOTOR ................................... 32
System Description .................................................32 . H
INSPECTION AND ADJUSTMENT .................... 5
. Air Mix Door Motor Component Function Check ....33
Operational Check (Front) ........................................ 5
. Air Mix Door Motor (Driver) Diagnosis Procedure....34
Operational Check (Rear) ........................................ 6
. Air Mix Door Motor (Passenger) Diagnosis Proce- HAC
dure ........................................................................38
.
FUNCTION DIAGNOSIS .............................. 8
.
INTAKE DOOR MOTOR ................................... 42
FUNCTION INFORMATION ............................... 8
. J
System Description .................................................42
.
Component Part Location ........................................ 8
.
Intake Door Motor Component Function Check .....43 .
Symptom Table ...................................................... 11
.
Intake Door Motor Diagnosis Procedure ................44 .
REFRIGERATION SYSTEM .............................13
. K
BLOWER MOTOR CONTROL SYSTEM .......... 46
Refrigerant Cycle ................................................... 13
.
System Description .................................................46 .
Refrigerant System Protection ............................... 13 .
Front Blower Motor Component Function Check ....47 L
AUTOMATIC AIR CONDITIONER SYSTEM ....15 Front Blower Motor Diagnosis Procedure ...............48 .
Control System Diagram ........................................ 15
. Front Blower Motor Component Inspection ............52 .
Control System Description .................................... 15
. Rear Blower Motor Description ...............................52 .
Rear Blower Motor Component Function Check ....53 M
Discharge Air Flow (Front) ..................................... 18
.
Switches And Their Control Function (Front) ......... 19 . Rear Air Control (Front) Diagnosis Procedure #1....54
Switches And Their Control Function (Rear) .......... 20 . Rear Air Control (Rear) Diagnosis Procedure #2 ....55
Rear Air Control (Rear) Diagnosis Procedure #3 ....56 N
DIAGNOSIS SYSTEM (HVAC) .........................21
. Rear Air Control (Rear) Diagnosis Procedure #4 ....59
CONSULT-III Function (HVAC) .............................. 21
. Rear Blower Motor And Relay Component Inspec-
tion ..........................................................................60
. O
DIAGNOSIS SYSTEM (BCM) ...........................22
.
CONSULT-III Function (BCM - COMMON ITEM).... 22 REAR AIR CONTROL SYSTEM ....................... 62
CONSULT-III Function (BCM - AUTO AIR CON- Rear Air Control System Description ......................62
.
DITIONER) ............................................................. 22
. Rear Air Control Component Function Check ........62 . P
Rear Air Control (Front) Diagnosis Procedure ........63
.
SELF-DIAGNOSIS FUNCTION .........................24
. Rear Air Control (Rear) Diagnosis Procedure ........65.
A/C Auto Amp. Self-Diagnosis ............................... 24
.
A/C and AV Switch Assembly Self-Diagnosis ........ 24 . MAGNET CLUTCH ........................................... 68
A/C System Self-Diagnosis Code Chart ................. 25
. System Description .................................................68
.
Magnet Clutch Component Function Check ...........68 .
COMPONENT DIAGNOSIS ........................ 26
. Magnet Clutch Diagnosis Procedure ......................69 .
Revision: October 2008 HAC-1 2009 Pathfinder
WATER VALVE CIRCUIT ................................. 73
. PRECAUTIONS ............................................... 122
.
Water Valve Description (VK56DE) ....................... 73
. Supplemental Restraint System (SRS) "AIR BAG"
Water Valve Diagnosis Procedure (VK56DE) ........ 73 . and "SEAT BELT PRE-TENSIONER" ................. 122 .
Working with HFC-134a (R-134a) ........................ 122
.
HEATER PUMP ................................................ 75
. Precaution for Service Equipment ....................... 123
.
System Description (VQ40DE) .............................. 75
. MANUAL AIR CONDITIONER
Diagnosis Procedure (VQ40DE) ............................ 75
.
Component Inspection (VQ40DE) ......................... 77
. BASIC INSPECTION ................................. 124
AMBIENT SENSOR .......................................... 78
. DIAGNOSIS AND REPAIR WORKFLOW ....... 124
.
Component Description ......................................... 78
. How to Perform Trouble Diagnosis For Quick And
Ambient Sensor Diagnosis Procedure ................... 78 . Accurate Repair ................................................... 124
.
Ambient Sensor Component Inspection ................ 79 .
INSPECTION AND ADJUSTMENT ................. 125
.
IN-VEHICLE SENSOR ...................................... 81
. Operational Check ............................................... 125
.
Component Description ......................................... 81
.
In-Vehicle Sensor Diagnosis Procedure ................ 81 . FUNCTION DIAGNOSIS ........................... 127
In-Vehicle Sensor Component Inspection ............. 83 .
FUNCTION INFORMATION ............................ 127
.
OPTICAL SENSOR .......................................... 84
. Component Part Location .................................... 127 .
Component Description ......................................... 84
. Symptom Table .................................................... 129
.
Optical Sensor Diagnosis Procedure ..................... 84 .
REFRIGERATION SYSTEM ............................ 130
.
INTAKE SENSOR ............................................. 86
. Refrigerant Cycle ................................................. 130
.
System Description ................................................ 86
. Refrigerant System Protection ............................. 130 .
Intake Sensor Diagnosis Procedure ...................... 86 .
Intake Sensor Component Inspection ................... 87 . MANUAL AIR CONDITIONER SYSTEM ........ 132
.
Control System Diagram ...................................... 132.
POWER SUPPLY AND GROUND CIRCUIT Control System Description ................................. 132 .
FOR CONTROLLER ......................................... 88
. Discharge Air Flow ............................................... 134
.
Component Description ......................................... 88 . Switches And Their Control Function ................... 134 .
A/C Auto Amp. Component Function Check ......... 88 .
A/C Auto Amp Power and Ground Diagnosis Pro- DIAGNOSIS SYSTEM (BCM) .......................... 136
.
cedure .................................................................... 89
. CONSULT-III Function (BCM - COMMON ITEM) . 136
CONSULT-III Function (BCM - AUTO AIR CON-
ECU DIAGNOSIS ....................................... 90
. DITIONER) ........................................................... 136
.
AIR CONDITIONER CONTROL ....................... 90
. COMPONENT DIAGNOSIS ...................... 138
A/C Auto Amp. Terminals Reference Values ........ 90 .
Wiring Diagram ...................................................... 92
. MODE DOOR MOTOR .................................... 138
.
System Description .............................................. 138 .
SYMPTOM DIAGNOSIS ........................... 108
. Mode Door Motor (Front) Component Function
Check ................................................................... 138
.
AIR CONDITIONER CONTROL ..................... 108
. Mode Door Motor (Front) Diagnosis Procedure ... 139 .
Symptom Matrix Chart ........................................108
.
AIR MIX DOOR MOTOR ................................. 142
.
INSUFFICIENT COOLING .............................. 109
. System Description .............................................. 142
.
Component Function Check .................................109 . Air Mix Door Motor Component Function Check . 143
Diagnostic Work Flow ...........................................110
. Air Mix Door Motor Diagnosis Procedure ............. 144 .
Performance Chart ...............................................112
.
Trouble Diagnoses for Abnormal Pressure ..........113 . INTAKE DOOR MOTOR .................................. 146
.
System Description .............................................. 146
.
INSUFFICIENT HEATING .............................. 117
. Intake Door Motor Component Function Check ... 146 .
Component Function Check .................................117
. Intake Door Motor Diagnosis Procedure .............. 147 .
NOISE ............................................................. 119
. BLOWER MOTOR ........................................... 149
.
Component Function Check .................................119
. System Description .............................................. 149
.
Front Blower Motor Component Function Check . 149
MEMORY FUNCTION DOES NOT OPERATE. 121 Front Blower Motor Diagnosis Procedure ............ 150 .
Memory Function Check .......................................121
.
Front Blower Motor Component Inspection ......... 154 .
PRECAUTION ........................................... 122
. MAGNET CLUTCH .......................................... 156
.
Revision: October 2008 HAC-2 2009 Pathfinder
System Description .............................................. 156
. SYMPTOM DIAGNOSIS ........................... 174
.
Magnet Clutch Component Function Check ........ 156 . A
Magnet Clutch Diagnosis Procedure .................... 156 . AIR CONDITIONER CONTROL ...................... 174
Symptom Matrix Chart ........................................ 174
.
INTAKE SENSOR ........................................... 161
.
System Description .............................................. 161
. INSUFFICIENT COOLING .............................. 175 B
Intake Sensor Diagnosis Procedure ..................... 161 . Component Function Check ................................. 175 .
Intake Sensor Component Inspection .................. 162 . Diagnostic Work Flow ........................................... 176
.
Performance Chart ............................................... 178
. C
POWER SUPPLY AND GROUND CIRCUIT Trouble Diagnoses for Abnormal Pressure .......... 179 .
FOR CONTROLLER ....................................... 163
.
Component Description ........................................ 163 . INSUFFICIENT HEATING ............................... 183
D
Front Air Control Component Function Check ..... 163 . Component Function Check ................................. 183
.
Front Air Control Power and Ground Diagnosis
Procedure ............................................................. 164
.
NOISE .............................................................. 185
Component Function Check ................................. 185
. E
ECU DIAGNOSIS ...................................... 165
.
PRECAUTION ........................................... 187
.
AIR CONDITIONER CONTROL ...................... 165
.
PRECAUTIONS ............................................... 187 F
System Description .............................................. 165
.
Supplemental Restraint System (SRS) "AIR BAG"
System Operation ................................................ 165
.
and "SEAT BELT PRE-TENSIONER" .................. 187 .
Front Air Control Terminals Reference Values .... 166 .
Working with HFC-134a (R-134a) ........................ 187
. G
Wiring Diagram .................................................... 168
.
Precaution for Service Equipment ........................ 188
.
H
HAC
J
K
L
M
N
O
P
Revision: October 2008 HAC-3 2009 Pathfinder
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:0000000003935869
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-125, "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-174, "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-24, "A/C Auto Amp. Self-Diagnosis".
>> If any diagnostic trouble codes set. Refer to HAC-25, "A/C System Self-Diagnosis Code Chart".
>> Confirm the repair by performing operational check. Refer to HAC-125, "Operational Check".
Revision: October 2008 HAC-4 2009 Pathfinder
INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [AUTOMATIC AIR CONDITIONER]
INSPECTION AND ADJUSTMENT
A
Operational Check (Front) INFOID:0000000003935870
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