Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Titan 2004-2009 Approved Nissan Titan 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 System Description .................................................22
. F
Mode Door Motor Component Function Check ......23 .
BASIC INSPECTION ................................... 6
. Mode Door Motor Diagnosis Procedure .................24 .
G
DIAGNOSIS AND REPAIR WORKFLOW ......... 6
. AIR MIX DOOR MOTOR ................................... 28
How to Perform Trouble Diagnosis For Quick And System Description .................................................28 .
Accurate Repair ....................................................... 6
. Air Mix Door Motor Component Function Check ....29
Air Mix Door Motor (Driver) Diagnosis Procedure....30 H
INSPECTION AND ADJUSTMENT .................... 7
. Air Mix Door Motor (Passenger) Diagnosis Proce-
Operational Check ................................................... 7
. dure ........................................................................33
.
HAC
FUNCTION DIAGNOSIS .............................. 9
. INTAKE DOOR MOTOR ................................... 37
System Description .................................................37
.
FUNCTION INFORMATION ............................... 9
. Intake Door Motor Component Function Check .....38 .
Component Part Location ........................................ 9
. J
Intake Door Motor Diagnosis Procedure ................39 .
Symptom Table ...................................................... 11
.
DEFROSTER DOOR MOTOR CIRCUIT ........... 41
REFRIGERATION SYSTEM .............................12
. System Description .................................................41
.
Refrigerant Cycle ................................................... 12
. K
Defroster Door Motor Component Function Check
Refrigerant System Protection ............................... 12 . ....41
AUTOMATIC AIR CONDITIONER SYSTEM ....13 Defroster Door Motor Diagnosis Procedure ...........42 .
L
Control System Diagram ........................................ 13
. BLOWER MOTOR CONTROL SYSTEM .......... 46
Control System Description .................................... 13
. System Description .................................................46
.
Discharge Air Flow ................................................. 15
. Front Blower Motor Component Function Check ....47 M
Switches And Their Control Function ..................... 16 . Front Blower Motor Diagnosis Procedure ...............48 .
CAN COMMUNICATION SYSTEM ...................17
. Front Blower Motor Component Inspection ............51 .
System Description ................................................ 17
. MAGNET CLUTCH ........................................... 53 N
DIAGNOSIS SYSTEM (HVAC) .........................18
. System Description .................................................53
.
CONSULT-III Function (HVAC) .............................. 18
. Magnet Clutch Component Function Check ...........53 .
Magnet Clutch Diagnosis Procedure ......................54 . O
DIAGNOSIS SYSTEM (BCM) ...........................20
.
CONSULT-III Function (BCM) ................................ 20
. WATER VALVE CIRCUIT ................................. 58
Description ..............................................................58
.
P
SELF-DIAGNOSIS FUNCTION .........................21
. Water Valve Diagnosis Procedure ..........................58 .
Front Air Control Self-Diagnosis ............................. 21
.
Front Air Control Self-Diagnosis Code Chart ......... 21 . AMBIENT SENSOR .......................................... 60
Component Description ..........................................60
.
COMPONENT DIAGNOSIS ........................ 22
. Ambient Sensor Diagnosis Procedure ....................60 .
Ambient Sensor Component Inspection .................61 .
MODE DOOR MOTOR ......................................22
.
Revision: April 2007 HAC-1 2008 Titan
IN-VEHICLE SENSOR ...................................... 63
. DIAGNOSIS AND REPAIR WORKFLOW ....... 100
.
Component Description ......................................... 63
. How to Perform Trouble Diagnosis For Quick And
In-Vehicle Sensor Diagnosis Procedure ................ 63 . Accurate Repair ................................................... 100
.
In-Vehicle Sensor Component Inspection ............. 65 .
INSPECTION AND ADJUSTMENT ................. 101
.
OPTICAL SENSOR .......................................... 66
. Operational Check ............................................... 101
.
Component Description ......................................... 66
.
Optical Sensor Diagnosis Procedure ..................... 66 . FUNCTION DIAGNOSIS ........................... 103
INTAKE SENSOR ............................................. 68
. MANUAL A/C IDENTIFICATION TABLE ........ 103
.
System Description ................................................ 68
. Application Table ................................................. 103
.
Intake Sensor Diagnosis Procedure ...................... 68 .
Intake Sensor Component Inspection ................... 69 .
FUNCTION INFORMATION ............................ 104
.
Component Part Location .................................... 104 .
POWER SUPPLY AND GROUND CIRCUIT Symptom Table .................................................... 106
.
FOR CONTROLLER ......................................... 70
.
REFRIGERATION SYSTEM ............................ 107
.
Component Description ......................................... 70 .
Refrigerant Cycle ................................................. 107
.
Front Air Control Component Function Check ....... 70 .
Refrigerant System Protection ............................. 107 .
Front Air Control Power and Ground Diagnosis
Procedure .............................................................. 71
. MANUAL AIR CONDITIONER SYSTEM ........ 108
.
Control System Diagram ...................................... 108.
ECU DIAGNOSIS ....................................... 72
. Control System Description ................................. 108 .
AIR CONDITIONER CONTROL ....................... 72
. Discharge Air Flow ............................................... 110
.
Front Air Control Terminals Reference Values ...... 72 . Switches And Their Control Function ................... 110 .
Wiring Diagram ...................................................... 74
. CAN COMMUNICATION SYSTEM ................. 112
.
SYMPTOM DIAGNOSIS ............................ 83
. System Description .............................................. 112
.
AIR CONDITIONER CONTROL ....................... 83
. DIAGNOSIS SYSTEM (HVAC) ........................ 113
.
CONSULT-III Function (HVAC) ........................... 113
.
Symptom Matrix Chart ......................................... 83
.
INSUFFICIENT COOLING ................................ 84
. DIAGNOSIS SYSTEM (BCM) .......................... 114
.
CONSULT-III Function (BCM) ............................. 114
.
Component Function Check .................................. 84 .
Performance Test Diagnoses ................................ 85 . SELF-DIAGNOSIS FUNCTION ....................... 115
.
Performance Chart ................................................ 87
. Front Air Control Self-Diagnosis .......................... 115
.
Test Reading ......................................................... 88
. Front Air Control Self-Diagnosis Code Chart ....... 115 .
Trouble Diagnoses for Unusual Pressure .............. 89 .
COMPONENT DIAGNOSIS ...................... 116
INSUFFICIENT HEATING ................................ 92
.
Component Function Check .................................. 92
. MANUAL A/C IDENTIFICATION TABLE ........ 116
.
Application Table ................................................. 116
.
NOISE ............................................................... 94
.
Component Function Check .................................. 94
. MODE DOOR MOTOR .................................... 117
.
System Description .............................................. 117
.
MEMORY FUNCTION DOES NOT OPERATE... 96 Mode Door Motor Component Function Check ... 117 .
Memory Function Check ........................................ 96
.
Mode Door Motor Diagnosis Procedure ............... 118 .
PRECAUTION ............................................ 97
. AIR MIX DOOR MOTOR ................................. 122
.
PRECAUTIONS ................................................ 97
. System Description .............................................. 122
.
Air Mix Door Motor Component Function Check . 122
Supplemental Restraint System (SRS) "AIR BAG"
and "SEAT BELT PRE-TENSIONER" ................... 97 . Air Mix Door Motor Diagnosis Procedure ............. 123 .
Working with HFC-134a (R-134a) ......................... 97
. INTAKE DOOR MOTOR .................................. 127
.
Precaution for Service Equipment ......................... 98
. System Description .............................................. 127
.
MANUAL A/C (TYPE 1) Intake Door Motor Component Function Check ... 127 .
Intake Door Motor Diagnosis Procedure .............. 128 .
BASIC INSPECTION .................................. 99
.
DEFROSTER DOOR MOTOR CIRCUIT ......... 130
.
MANUAL A/C IDENTIFICATION TABLE ......... 99
. System Description .............................................. 130
.
Application Table ................................................... 99
.
Revision: April 2007 HAC-2 2008 Titan
Defroster Door Motor Component Function Check NOISE .............................................................. 177
.. 130 Component Function Check ................................. 177
. A
Defroster Door Motor Diagnosis Procedure ......... 131
.
PRECAUTION ........................................... 179
.
BLOWER MOTOR CONTROL SYSTEM ........ 135
.
System Description .............................................. 135
. PRECAUTIONS ............................................... 179 B
Front Blower Motor Component Function Check .. 135 Supplemental Restraint System (SRS) "AIR BAG"
Front Blower Motor Diagnosis Procedure ............ 136 . and "SEAT BELT PRE-TENSIONER" .................. 179 .
Front Blower Motor Component Inspection .......... 139 . Working with HFC-134a (R-134a) ........................ 179
. C
Precaution for Service Equipment ........................ 180
.
MAGNET CLUTCH .......................................... 141
. MANUAL A/C (TYPE 2)
System Description .............................................. 141
.
D
Magnet Clutch Component Function Check ........ 141 . BASIC INSPECTION ................................ 181
.
Magnet Clutch Diagnosis Procedure .................... 142 .
MANUAL A/C IDENTIFICATION TABLE ....... 181
WATER VALVE CIRCUIT ............................... 146
. Application Table .................................................. 181
. E
Description ........................................................... 146
.
Water Valve Diagnosis Procedure ....................... 146 . DIAGNOSIS AND REPAIR WORKFLOW ...... 182
How to Perform Trouble Diagnosis For Quick And
AMBIENT SENSOR ........................................ 148
. F
Accurate Repair .................................................... 182
.
Component Description ........................................ 148
.
Ambient Sensor Diagnosis Procedure ................. 148 . INSPECTION AND ADJUSTMENT ................ 183
Ambient Sensor Component Inspection ............... 149 . Operational Check ................................................ 183
. G
INTAKE SENSOR ........................................... 151
. FUNCTION DIAGNOSIS ........................... 185
.
System Description .............................................. 151
.
MANUAL A/C IDENTIFICATION TABLE ....... 185 H
Intake Sensor Diagnosis Procedure ..................... 151 .
Intake Sensor Component Inspection .................. 152 . Application Table .................................................. 185
.
POWER SUPPLY AND GROUND CIRCUIT FUNCTION INFORMATION ............................ 186 HAC
FOR CONTROLLER ....................................... 153
. Component Part Location ..................................... 186
.
Component Description ........................................ 153 . Symptom Table .................................................... 188
.
Front Air Control Component Function Check ..... 153 . REFRIGERATION SYSTEM ........................... 189 J
Front Air Control Power and Ground Diagnosis Refrigerant Cycle .................................................. 189
.
Procedure ............................................................. 154
.
Refrigerant System Protection .............................. 189 .
ECU DIAGNOSIS ...................................... 155
. K
MANUAL AIR CONDITIONER SYSTEM ........ 190
MANUAL A/C IDENTIFICATION TABLE ....... 155
. Control System Diagram ...................................... 190
.
Application Table .................................................. 155
. Control System Description .................................. 190
.
Discharge Air Flow ............................................... 191
. L
AIR CONDITIONER CONTROL ...................... 156
. Switches And Their Control Function ................... 192 .
Front Air Control Terminals Reference Values .... 156 .
Wiring Diagram .................................................... 158
.
CAN COMMUNICATION SYSTEM ................. 194 M
System Description ............................................... 194
.
SYMPTOM DIAGNOSIS ........................... 165
.
DIAGNOSIS SYSTEM (BCM) ......................... 195
MANUAL A/C IDENTIFICATION TABLE ....... 165
. CONSULT-III Function (BCM) .............................. 195
. N
Application Table .................................................. 165
.
COMPONENT DIAGNOSIS ...................... 196
.
AIR CONDITIONER CONTROL ...................... 166
. O
Symptom Matrix Chart ........................................ 166
.
MANUAL A/C IDENTIFICATION TABLE ....... 196
Application Table .................................................. 196
.
INSUFFICIENT COOLING .............................. 167
.
Component Function Check ................................. 167 .
MODE DOOR MOTOR .................................... 197 P
System Description ............................................... 197
.
Performance Test Diagnoses ............................... 168 .
Mode Door Motor Component Function Check .... 197 .
Performance Chart ............................................... 170
.
Mode Door Motor Diagnosis Procedure ............... 198 .
Test Reading ........................................................ 171
.
Trouble Diagnoses for Unusual Pressure ............ 172 . AIR MIX DOOR MOTOR ................................. 202
INSUFFICIENT HEATING ............................... 175
. System Description ............................................... 202
.
Air Mix Door Motor Component Function Check .. 202
Component Function Check ................................. 175
.
Revision: April 2007 HAC-3 2008 Titan
Air Mix Door Motor Diagnosis Procedure .............203
. Trouble Diagnoses for Unusual Pressure ............ 249
.
INTAKE DOOR MOTOR ................................. 207
. INSUFFICIENT HEATING ............................... 252
.
System Description ...............................................207
. Component Function Check ................................ 252
.
Intake Door Motor Component Function Check ...207 .
Intake Door Motor Diagnosis Procedure ..............208 . NOISE .............................................................. 254
.
Component Function Check ................................ 254
.
DEFROSTER DOOR MOTOR CIRCUIT ........ 210
.
System Description ...............................................210
. PRECAUTION ........................................... 256
Defroster Door Motor Component Function Check
..210
PRECAUTIONS ............................................... 256
.
Supplemental Restraint System (SRS) "AIR BAG"
Defroster Door Motor Diagnosis Procedure ..........211 .
and "SEAT BELT PRE-TENSIONER" ................. 256 .
BLOWER MOTOR CONTROL SYSTEM ....... 215
. Working with HFC-134a (R-134a) ........................ 256
.
System Description ...............................................215
. Precaution for Service Equipment ....................... 257
.
Front Blower Motor Component Function Check ..215 MANUAL A/C (TYPE 3)
Front Blower Motor Diagnosis Procedure .............216 .
Front Blower Motor Component Inspection ..........219 . BASIC INSPECTION ................................. 258
MAGNET CLUTCH ......................................... 221
. MANUAL A/C IDENTIFICATION TABLE ........ 258
.
System Description ...............................................221
. Application Table ................................................. 258
.
Magnet Clutch Component Function Check .........221 .
Magnet Clutch Diagnosis Procedure ....................221 .
DIAGNOSIS AND REPAIR WORKFLOW ....... 259
.
How to Perform Trouble Diagnosis For Quick And
WATER VALVE CIRCUIT ............................... 226
. Accurate Repair ................................................... 259
.
Description ............................................................226
.
Water Valve Diagnosis Procedure ........................226 .
INSPECTION AND ADJUSTMENT ................. 260
.
Operational Check ............................................... 260
.
INTAKE SENSOR ........................................... 228
.
System Description ...............................................228
. FUNCTION DIAGNOSIS ........................... 262
Intake Sensor Diagnosis Procedure .....................228 . MANUAL A/C IDENTIFICATION TABLE ........ 262
.
Intake Sensor Component Inspection ..................229 .
Application Table ................................................. 262
.
POWER SUPPLY AND GROUND CIRCUIT FUNCTION INFORMATION ............................ 263
.
FOR CONTROLLER ....................................... 230
. Component Part Location .................................... 263 .
Component Description ........................................230 . Symptom Table .................................................... 265
.
Front Air Control Component Function Check ......230 .
Front Air Control Power and Ground Diagnosis REFRIGERATION SYSTEM ............................ 266
.
Procedure .............................................................231
. Refrigerant Cycle ................................................. 266
.
Refrigerant System Protection ............................. 266 .
ECU DIAGNOSIS ...................................... 232
.
MANUAL AIR CONDITIONER SYSTEM ........ 267
.
MANUAL A/C IDENTIFICATION TABLE ....... 232
. Control System Diagram ...................................... 267.
Application Table ..................................................232
. Control System Description ................................. 267 .
Discharge Air Flow ............................................... 268
.
AIR CONDITIONER CONTROL ..................... 233
.
Switches And Their Control Function ................... 269 .
Front Air Control Terminals Reference Values .....233 .
Wiring Diagram .....................................................235
. CAN COMMUNICATION SYSTEM ................. 271
.
System Description .............................................. 271
.
SYMPTOM DIAGNOSIS ........................... 242
.
DIAGNOSIS SYSTEM (BCM) .......................... 272
.
MANUAL A/C IDENTIFICATION TABLE ....... 242
. CONSULT-III Function (BCM) ............................. 272
.
Application Table ..................................................242
.
COMPONENT DIAGNOSIS ...................... 273
AIR CONDITIONER CONTROL ..................... 243
.
Symptom Matrix Chart ........................................243
. MANUAL A/C IDENTIFICATION TABLE ........ 273
.
Application Table ................................................. 273
.
INSUFFICIENT COOLING .............................. 244
.
Component Function Check .................................244 . MODE DOOR MOTOR .................................... 274
.
Performance Test Diagnoses ...............................245 . System Description .............................................. 274
.
Performance Chart ...............................................247
. Mode Door Motor Component Function Check ... 274 .
Test Reading ........................................................248
. Mode Door Motor Diagnosis Procedure ............... 275 .
Revision: April 2007 HAC-4 2008 Titan
AIR MIX DOOR MOTOR ................................. 279
. Front Air Control Power and Ground Diagnosis
System Description .............................................. 279
. Procedure ............................................................. 309
. A
Air Mix Door Motor Component Function Check .. 279
Air Mix Door Motor Diagnosis Procedure ............. 280 . ECU DIAGNOSIS ...................................... 310
.
MANUAL A/C IDENTIFICATION TABLE ....... 310 B
INTAKE DOOR MOTOR ................................. 284
.
System Description .............................................. 284
. Application Table .................................................. 310
.
Intake Door Motor Component Function Check ... 284 .
AIR CONDITIONER CONTROL ...................... 311 C
Intake Door Motor Diagnosis Procedure .............. 285 .
Front Air Control Terminals Reference Values ..... 311 .
DEFROSTER DOOR MOTOR CIRCUIT ......... 287
. Wiring Diagram ..................................................... 313
.
System Description .............................................. 287
.
Defroster Door Motor Component Function Check
SYMPTOM DIAGNOSIS ........................... 321
. D
.. 287 MANUAL A/C IDENTIFICATION TABLE ....... 321
Defroster Door Motor Diagnosis Procedure ......... 288 . Application Table .................................................. 321
. E
BLOWER MOTOR CONTROL SYSTEM ........ 292
. AIR CONDITIONER CONTROL ...................... 322
System Description .............................................. 292
. Symptom Matrix Chart ........................................ 322
.
Front Blower Motor Component Function Check .. 292 F
Front Blower Motor Diagnosis Procedure ............ 293 . INSUFFICIENT COOLING .............................. 323
Front Blower Motor Component Inspection .......... 296 . Component Function Check ................................. 323 .
Performance Test Diagnoses ............................... 324 .
MAGNET CLUTCH .......................................... 299
. G
Performance Chart ............................................... 326
.
System Description .............................................. 299
. Test Reading ........................................................ 327
.
Magnet Clutch Component Function Check ........ 299 . Trouble Diagnoses for Unusual Pressure ............. 328 .
Magnet Clutch Diagnosis Procedure .................... 299 . H
INSUFFICIENT HEATING ............................... 331
WATER VALVE CIRCUIT ............................... 304
. Component Function Check ................................. 331
.
Description ........................................................... 304
.
Water Valve Diagnosis Procedure ....................... 304 . NOISE .............................................................. 333 HAC
Component Function Check ................................. 333
.
INTAKE SENSOR ........................................... 306
.
System Description .............................................. 306
. PRECAUTION ........................................... 335
. J
Intake Sensor Diagnosis Procedure ..................... 306 .
Intake Sensor Component Inspection .................. 307 . PRECAUTIONS ............................................... 335
Supplemental Restraint System (SRS) "AIR BAG"
POWER SUPPLY AND GROUND CIRCUIT and "SEAT BELT PRE-TENSIONER" .................. 335 . K
FOR CONTROLLER ....................................... 308
. Working with HFC-134a (R-134a) ........................ 335
.
Component Description ........................................ 308
. Precaution for Service Equipment ........................ 336
.
Front Air Control Component Function Check ..... 308 . L
M
N
O
P
Revision: April 2007 HAC-5 2008 Titan
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:0000000001611774
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-7, "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-83, "Symptom Matrix Chart".
Can a symptom be duplicated?
>> GO TO 5.
5.PERFORM THE FRONT AIR CONTROL SELF-DIAGNOSIS
Perform front air control self-diagnosis. Refer to HAC-21, "Front Air Control Self-Diagnosis".
>> If any diagnostic trouble codes set. Refer to HAC-21, "Front Air Control Self-Diagnosis Code
Chart".
>> Confirm the repair by performing operational check. Refer to HAC-7, "Operational Check".
Revision: April 2007 HAC-6 2008 Titan
INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [AUTOMATIC AIR CONDITIONER]
INSPECTION AND ADJUSTMENT
A
Operational Check INFOID:0000000001611775
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 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo