2005 NISSAN NAVARA Heater Core

IDX-4
ALPHABETICAL INDEX
Engine control system diagram and chart .........EC-15
Engine coolant ....................................................CO-7
Engine coolant temperature sensor (ECTS) ....EC-103
Engine oil .............................................................LU-5
Engine oil filter replacement .............................MA-26
Engine oil precautions ..........................................GI-7
Engine removal ...............................................EM-106
Engine room cover ............................................EM-20
Engine serial number ..........................................GI-58
Evaporator ....................................ATC-149,MTC-129
Exhaust manifold ..............................................EM-34
Exhaust system ...................................................EX-2
Exhaust system inspection ..................................EX-2
Expansion valve ............................ATC-150,MTC-130
F
F/FOG - Wiring diagram .....................................LT-74
F/PUMP - Wiring diagram ..EC-248,EC-254,EC-260,
EC-266
Final drive pre-inspection .................................FFD-18
Final drive removal and installation ..RFD-14,RFD-81
Flow charts .........................................................GI-24
Fluid temperature sensor (A/T) ........................AT-118
Fluids ................................................................MA-14
Fluorescent leak detector .............ATC-150,MTC-131
Flywheel (clutch) ................................................CL-17
Flywheel runout ..............................................EM-134
Fog lamp, front ....................................................LT-71
Foot lamp ..........................................................LT-145
Fork rod (M/T) ....................................................MT-23
Freeze frame data .............................................EC-28
Front brake solenoid valve .................AT-137,AT-139
Front bumper ......................................................EI-15
Front case (Transfer) ..........................TF-114,TF-120
Front combination lamp removal and installationLT-30
Front door ................BL-118,BL-120,BL-126,GW-35
Front Door Trim ..................................................EI-30
Front drive shaft (Transfer) ...TF-114,TF-120,TF-133
Front final drive removal and installation (4WD) ...........
FFD-15
Front fog lamp .....................................................LT-71
Front passenger air bag ..................................SRS-40
Front seat ...........................................................SE-20
Front seat belt ............................................SB-3,SB-5
Front seat belt pre-tensioner ...............SRS-3,SRS-47
Front side air bag ............................................SRS-43
Front washer ......................................................WW-4
Front wiper .........................................................WW-4
FRPS - Wiring diagram ....................................EC-120
FTS - Wiring diagram .......................................EC-115
Fuel cut control (at no load high engine speed) .EC-20
Fuel filler lid ......................................................BL-136
Fuel filter ............................................................EC-23
Fuel filter replacement ..........................................FL-4
Fuel gauge ............................................................DI-4
Fuel injection control system .............................EC-18
Fuel injector ............EC-25,EC-123,EC-125,EC-237
Fuel injector and fuel tube ................................EM-44
Fuel leak ............................................................EC-88
Fuel line inspection ..............................................FL-3
Fuel pumpEC-86,EC-217,EC-245,EC-251,EC-258,
EC-263
Fuel pump(Learning Value Clearing) .................EC-24
Fuel rail pressure sensor .................................EC-118
Fuel system .........................................................FL-3
Fuel tank ..............................................................FL-9
Fuel temperature sensor ..................................EC-113
Fuse ......................................................PG-74,PG-84
Fuse and fusible link box ..................................PG-84
Fusible link ............................................PG-74,PG-84
G
Garage jack and safety stand .............................GI-52
Gauges .................................................................DI-4
Gear components (M/T) ....................................MT-21
Generator ...........................................................SC-14
Generator - See Alternator ................................SC-14
Glass ........................GW-11,GW-35,GW-38,GW-43
Glove box lamp ................................................LT-162
GLOW - Wiring diagram ..................................EC-296
Glow plug ............................................EM-41,EC-295
Glow relay ........................................................EC-295
Grease ..............................................................MA-14
Ground distribution ...........................................PG-27
H
H/AIM - Wiring diagram .....................................LT-66
Harness connector ............................................PG-75
Harness layout ..................................................PG-38
Hazard warning lamp .........................................LT-97
Headlamp aiming control ...................................LT-66
Headlamp leveler - See Headlamp aiming control ........
LT-66
Headlamp removal and installation ....................LT-30
Heat up switch .................................................EC-319
Heated seat .......................................................SE-12
Heater and cooling unit (Heater core) ..........ATC-124,
ATC-127
,MTC-103,MTC-106
Heater unit (heater core) ..............ATC-124,ATC-127,
MTC-103
,MTC-106
HEATUP - Wiring diagram ...............................EC-320
Height (Dimensions) ...........................................GI-60
HFC134a (R134a) system precaution .ATC-4,MTC-4
HFC134a (R134a) system service procedureATC-138,
MTC-118
HFC134a (R134a) system service tools ........ATC-16,
MTC-16
HFC134a system service equipment precaution ..........
ATC-12
,MTC-12
High and low reverse clutch solenoid valve ....AT-147,
AT-149
HLC - Wiring diagram ......................................WW-41
Horn .................................................................WW-59
HORN - Wiring diagram ...................................WW-59
How to erase DTC .............................................EC-27

MTC-2
Schematic —LHD MODELS— ............................... 38
Wiring Diagram —A/C— —LHD MODELS— ......... 39
Schematic —RHD MODELS— ............................... 44
Wiring Diagram —A/C— —RHD MODELS— ......... 45
Front Air Control Terminals and Reference Value... 49
PIN CONNECTOR TERMINAL LAYOUT ............ 49
TERMINALS AND REFERENCE VALUE FOR
FRONT AIR CONTROL ....................................... 49
A/C System Self-diagnosis Function ...................... 51
DESCRIPTION .................................................... 51
Operational Check .................................................. 53
CHECKING BLOWER ......................................... 53
CHECKING DISCHARGE AIR ............................ 53
CHECKING RECIRCULATION ............................ 53
CHECKING TEMPERATURE DECREASE ......... 54
CHECKING TEMPERATURE INCREASE .......... 54
CHECK A/C SWITCH .......................................... 54
Power Supply and Ground Circuit for Front Air Con-
trol ........................................................................... 55
INSPECTION FLOW ........................................... 55
COMPONENT DESCRIPTION ............................ 56
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM... 56
Mode Door Motor Circuit ........................................ 58
INSPECTION FLOW ........................................... 58
SYSTEM DESCRIPTION .................................... 59
COMPONENT DESCRIPTION ............................ 59
DIAGNOSTIC PROCEDURE FOR MODE
DOOR MOTOR ................................................... 59
Air Mix Door Motor Circuit ...................................... 63
INSPECTION FLOW ........................................... 63
SYSTEM DESCRIPTION .................................... 64
COMPONENT DESCRIPTION ............................ 64
DIAGNOSTIC PROCEDURE FOR AIR MIX
DOOR MOTOR (FRONT) .................................... 64
Intake Door Motor Circuit ........................................ 68
INSPECTION FLOW ........................................... 68
SYSTEM DESCRIPTION .................................... 69
COMPONENT DESCRIPTION ............................ 69
DIAGNOSTIC PROCEDURE FOR INTAKE
DOOR MOTOR ................................................... 69
Blower Motor Circuit ............................................... 71
INSPECTION FLOW ........................................... 71
SYSTEM DESCRIPTION .................................... 72
COMPONENT DESCRIPTION ............................ 72
DIAGNOSTIC PROCEDURE FOR BLOWER
MOTOR ............................................................... 73
COMPONENT INSPECTION .............................. 77
Magnet Clutch Circuit ............................................. 79
INSPECTION FLOW ........................................... 79
SYSTEM DESCRIPTION .................................... 80
DIAGNOSTIC PROCEDURE FOR MAGNET
CLUTCH .............................................................. 80
COMPONENT INSPECTION .............................. 85
Insufficient Cooling ................................................. 86
INSPECTION FLOW ........................................... 86
PERFORMANCE TEST DIAGNOSES ................ 87
PERFORMANCE CHART ................................... 89
TROUBLE DIAGNOSES FOR UNUSUAL PRES-
SURE ................................................................... 90Insufficient Heating ................................................. 93
INSPECTION FLOW ............................................ 93
Noise ....................................................................... 94
INSPECTION FLOW ............................................ 94
Self-diagnosis ......................................................... 95
INSPECTION FLOW ............................................ 95
Intake Sensor Circuit ............................................... 95
COMPONENT DESCRIPTION ............................ 95
DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
SOR ..................................................................... 96
COMPONENT INSPECTION ............................... 97
CONTROL UNIT ........................................................ 98
Removal and Installation ......................................... 98
REMOVAL ............................................................ 98
INSTALLATION .................................................... 98
INTAKE SENSOR ...................................................... 99
Removal and Installation ......................................... 99
REMOVAL ............................................................ 99
INSTALLATION .................................................... 99
BLOWER MOTOR ...................................................100
Components ..........................................................100
Removal and Installation .......................................100
REMOVAL ..........................................................100
INSTALLATION ..................................................100
AIR CONDITIONER FILTER ...................................101
Removal and Installation .......................................101
FUNCTION ........................................................101
REPLACEMENT TIMING ..................................101
REPLACEMENT PROCEDURE ........................101
HEATER & COOLING UNIT ASSEMBLY ...............103
Components ..........................................................103
Removal and Installation .......................................105
REMOVAL ..........................................................105
INSTALLATION ..................................................105
HEATER CORE .......................................................106
Components ..........................................................106
Removal and Installation .......................................107
REMOVAL ..........................................................107
INSTALLATION ..................................................107
DEFROSTER DOOR MOTOR .................................108
Components ..........................................................108
Removal and Installation .......................................108
REMOVAL ..........................................................108
INSTALLATION ..................................................108
INTAKE DOOR MOTOR ..........................................109
Components ..........................................................109
Removal and Installation .......................................109
REMOVAL ..........................................................109
INSTALLATION ..................................................109
MODE DOOR MOTOR ............................................110
Components ..........................................................110
Removal and Installation .......................................110
REMOVAL ..........................................................110
INSTALLATION ..................................................110
AIR MIX DOOR MOTOR ......................................... 111
Components .......................................................... 111
Removal and Installation ....................................... 111
REMOVAL .......................................................... 111
INSTALLATION .................................................. 111

HEATER & COOLING UNIT ASSEMBLY
MTC-103
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MA
B
MTC
HEATER & COOLING UNIT ASSEMBLYPFP:27110
ComponentsEJS005GX
Heater and Cooling Unit Assembly —LHD Models—
MJIB0278E
1. High-pressure A/C pipe 2. Low-pressure A/C pipe 3. Expansion valve
4. Heater core and evaporator pipes
grommet5. A/C drain hose grommet 6. A/C drain hose
7. Heater core pipes 8. Coolant reservoir hose 9. Heater and cooling unit assembly

MTC-104
HEATER & COOLING UNIT ASSEMBLY
Heater and Cooling Unit Assembly —RHD Models—
MJIB0279E
1. High-pressure A/C pipe A 2. High-pressure A/C pipe B 3. Low-pressure A/C pipe
4. Expansion valve 5. Heater core and evaporator pipes
grommet6. A/C drain hose grommet
7. A/C drain hose 8. Heater core pipe mounts 9. Heater core pipes
10. Heater and cooling unit assembly

HEATER & COOLING UNIT ASSEMBLY
MTC-105
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MA
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MTC
Removal and InstallationEJS005GY
REMOVAL
1. Discharge the refrigerant from the A/C system. Refer toMTC-118, "Discharging Refrigerant".
2. Drain the coolant from the engine cooling system. Refer toCO-8, "
DRAINING ENGINE COOLANT".
3. Remove the cowl top extension. Refer toEI-20, "
Removal and Installation".
4. Remove the exhaust system. Refer toEX-3, "
Removal and Installation".
5. Disconnect the heater hoses from the heater core.
6. Disconnect the high/low pressure pipes from the expansion valve.
7. Move the two front seats to the rearmost position on the seat track.
8. Remove the instrument panel and console panel. Refer toIP-10, "
Removal and Installation".
9. Remove the steering column. Refer toPS-11, "
Removal and Installation".
10. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse
block (J/B) electrical connectors. Refer toPG-38, "
Harness Layout".
11. Disconnect the steering member from each side of the vehicle body.
12. Remove the heater and cooling unit assembly with it attached to the steering member, from the vehicle.
CAUTION:
Use care not to damage the seats and interior trim panels when removing the heater and cooling
unit assembly with it attached to the steering member.
13. Remove the heater and cooling unit assembly from the steering member.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
lReplace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply
compressor oil to it when installing it.
lAfter charging the refrigerant, check for leaks.
NOTE:
lFill the engine cooling system with the specified coolant mixture. Refer toCO-8, "REFILLING ENGINE
COOLANT".
lRecharge the A/C system. Refer toMTC-118, "Evacuating System and Charging Refrigerant".

MTC-106
HEATER CORE
HEATER CORE
PFP:27140
ComponentsEJS005GZ
1. Heater core cover 2. Heater core pipe bracket 3. Heater core
4. Upper bracket 5. Upper heater and cooling unit case 6. A/C evaporator
7. Lower heater and cooling unit case 8. Blower motor 9. Blower motor resistor
MJIB0248E

HEATER CORE
MTC-107
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B
MTC
Removal and InstallationEJS005H0
REMOVAL
1. Remove the heater and cooling unit assembly. Refer toMTC-103, "HEATER&COOLING UNIT ASSEM-
BLY".
2. Remove the four screws and remove the upper bracket.
3. Remove the four screws and remove the heater core cover.
4. Remove the heater core pipe bracket.
5. Remove the heater core.
NOTE:
If the air conditioner filters are contaminated from coolant leak-
ing from the heater core, replace the air conditioner filters with
new ones before installing the new heater core.
INSTALLATION
Installation is in the reverse order of removal.
MJIB0216E

REFRIGERANT LINES
MTC-129
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MTC
Removal and Installation for EvaporatorEJS005HK
Heater and Cooling Unit Assembly
MJIB0252E
1. Heater core cover 2. Heater core pipe bracket 3. Heater core
4. Upper bracket 5. Upper heater and cooling unit case 6. A/C evaporator
7. Lower heater and cooling unit case 8. Blower motor 9. Blower motor resistor