1999 NISSAN PRIMERA heater

INTAKE DOOR MOTOR
The intake door motor is installed on the intake unit. When the
door position is determined by pushing the ªRECº switch on the
control panel, the motor rotates and the air inlet is changed.
Removal and Installation
Refer to ªINSTRUMENT PANELº in BT section for details.
NOTE:
When removing the control panel, the Mode control cable should
be disconnected from the control panel rather than from the
heater.
Removal of the mode cable will result in breakage of the ferrule
retaining clips. On reassembly, the cable is retained by a snap
ring (Part number: 9-22504-1) which is pushed into a slot in the
control base plate which aligns with a groove in the cable sleeve.
NHA293
YHA294 Ignition switch
ON
Intake
door
motor
To A/C
control
KHA125 Snap ring
Control panelMode
cable
TROUBLE DIAGNOSESAUTO
Control Panel System (Cont'd)
HA-81

AIR MIX DOOR
1. Install air mix door motor on heater unit.
Ensure that the air mix door motor lever is fitted into slit por-
tion of air mix door link.
2. Connect the air mix door motor harness connector.
3. Turn ignition switch to ªONº position.
4. Check that air mix door operates properly when PTC is
moved from 18 to 32ÉC (64 to 90ÉF).
After positioning control cable, check that it operates cor-
rectly.
FRESH VENT CONTROL CABLE
1. Turn the fresh vent control knob to the shut position.
2. Set the fresh vent door lever in shut position.
3. Adjust the position of the cable cover for proper operation,
then secure to the clamps.
After positioning control cables, check that it operates
correctly.
INTAKE DOOR MOTOR
1. Install intake door motor on intake unit.
Ensure that the intake door motor lever is fitted into the slit
portion of intake door link.
2. Connect the intake door motor harness connector.
3. Turn ignition switch to ªONº position.
4. Check that intake door operates properly when REC switch
is turned ON and OFF.
KHA127 Air mix door link
Air mix door lever
Air mix door motor Heater unit
KHA126 Clamp
Pull
Clamp
Cable cover
ZHA178A
TROUBLE DIAGNOSESAUTO
Control Linkage Adjustment (Cont'd)
HA-83

IN-VEHICLE SENSOR
The in-vehicle sensor is attached to the right side of the control
unit. It converts variations in the temperature of the compartment
air drawn in by the aspirator into a resistance value, which is then
input into the auto amplifier.
After disconnecting in-vehicle sensor harness connector, mea-
sure resistance between terminals
p1andp2at sensor har-
ness side, using the table below.
Temperature ÉC (ÉF) Resistance kW
0 (32)6.0
5 (41)4.95
10 (50)3.99
15 (59)3.24
20 (68)2.65
25 (77)2.19
30 (86)1.81
35 (95)1.51
40 (104)1.27
Aspirator
The aspirator is located in front of heater unit. It produces
vacuum pressure due to air discharged from the heater unit,
continuously taking compartment air in the aspirator.
KHA128 PTC Output voltage
Set temperature (ÉC)
Output voltage
NHA295 In-vehicle
sensor
NHA287 In-vehicle
sensor
In-vehicle
sensor
NHA312 Aspirator
duct
Aspirator
SYSTEM DESCRIPTIONAUTO
Control System Input Components (Cont'd)
HA-85

AMBIENT SENSOR
The ambient sensor is located on the hood lock stay. It detects
the ambient temperature and converts it into a resistance value,
which is then input into the auto amplifier.
After disconnecting ambient sensor harness connector, measure
resistance between terminals
p1andp2at sensor harness
side, using the table below.
Temperature ÉC (ÉF) Resistance kW
þ20 (þ4)9.98
þ10 (14)5.57
0 (32)3.26
10 (50)1.98
20 (68)1.25
25 (77)1.00
30 (86)0.81
40 (104)0.54
SUNLOAD SENSOR
The sunload sensor is located on the center defroster grille. It
detects sunload entering through the windshield by means of a
photo diode and converts it into a current value which is then
input to the auto amplifier.
RHA979G Aspirator
Aspirator duct
Heater unit case
NHA313 Ambient sen-
sor
NHA288 Ambient sensor
harness connector
Ambient
sensor
NHA314 Sunload
sensor
SYSTEM DESCRIPTIONAUTO
Control System Input Components (Cont'd)
HA-86

lExamplep2
When the temperature in the vehicle is higher than the set
temperature.
When the temperature in the vehicle is high, in-vehicle sen-
sor resistance is small and the input voltage to the auto
amplifier becomes small. As a result, the voltage from the air
mix door position arithmetic circuit also becomes small.
When this voltage is smaller than the voltage from the PBR,
comparator (2), Tr
p2and Trp3turn ON.
Accordingly terminal No.
p13becomes!and terminal No.
p12becomes@. The air mix door motor rotates counterclock-
wise and the air mix door moves toward the ªCOLDº side.
As the air mix door moves toward the ªCOLDº side, the volt-
age from the PBR becomes smaller and consequently
becomes equal to that from the air mix door position arith-
metic circuit. As a result, comparator (2) turns OFF and the
air mix door motor stops.
AIR MIX DOOR MOTOR
The air mix door motor is attached to the heater unit. It rotates
so that the air mix door is opened to a position set by the auto
amplifier. Motor rotation is conveyed through a shaft. The air mix
door position is then fed back to the auto amplifier by the PBR
built into the air mix door motor.
SHA569CB Auto amp.
Comparator
(1)
Air mix door
position
arithmetic
circuit
PBR
Comparator
(2)Air mix
door
motor
SHA570CB Auto amp.
Comparator
(1)
Air mix door
position
arithmetic
circuit
PBR
Comparator
(2)Air mix
door
motor
KHA127 Air mix door link
Air mix door lever
Air mix door motor Heater unit
SYSTEM DESCRIPTIONAUTO
Control System Output Components (Cont'd)
HA-93

Evaporative emission (EVAP)
system ...............................EC-QG-25, EC-SR-27
Exhaust gas recirculation (EGR)
valve...........................................EC-QG-244, 305
Exhaust system ................................................FE-9
Exhaust system inspection ............................MA-48
Exterior ............................................................BT-31
F
FCUT - Wiring diagram ..........................EC-CD-101
F/FOG - Wiring diagram................................EL-110
Final drive (FF M/T) ...........................MT-32, 51, 71
Floor trim .........................................................BT-18
Fluid temperature sensor (A/T) .......................AT-94
Fluids..............................................................MA-16
Flywheel (clutch) .............................................CL-14
Flywheel runout..............................EM-60, 117, 177
Fog lamp, front ..............................................EL-110
Fog lamp, rear ...............................................EL-112
F/PUMP - Wiring
diagram..........................EC-QG-338, EC-SR-317
Freeze frame data ................EC-QG-38, EC-SR-50
Fresh vent door control linkage
adjustment ..................................................HA-83
FRO2 - Wiring diagram ........EC-QG-135, 154, 162,
EC-SR-147, 165, 172
FRO2/H - Wiring
diagram..........................EC-QG-168, EC-SR-177
Front axle ..........................................................FA-9
Front bumper ....................................................BT-5
Front disc brake .............................................BR-23
Front door .......................................................BT-13
Front fog lamp .......................................EL-110, 111
Front fog lamp removal and installation ...........BT-5
Front heated oxygen sensor
(HO2S) ......................................EC-QG-132, 139,
EC-SR-144, 150, 156, 162, 170
Front heated oxygen sensor (HO2S)
heater ............................EC-QG-166, EC-SR-175
Front passenger air bag .................................RS-17
Front seat ........................................................BT-40
Front seat belt ..................................................RS-3
Front suspension ............................................FA-26
Front washer .................................................EL-186
Front wiper ....................................................EL-186
FTS - Wiring diagram ............................EC-CD-105
FUEL - Wiring
diagram .........EC-QG-210, 217, EC-SR-213, 220
Fuel cut control (at no load & high
engine speed)....................EC-QG-25, EC-SR-27
Fuel cut solenoid valve ..........................EC-CD-100
Fuel filter ...............................EC-QG-29, EC-SR-31
Fuel filter replacement .......................MA-23, 33, 43
Fuel gauge ............................................EL-141, 146
Fuel injection system....................EC-QG-208, 215,
EC-SR-212, 218,
EC-CD-15, 18
Fuel injector ......................EC-QG-318, EC-SR-302
Fuel line inspection............................MA-22, 33, 43Fuel precautions ................................................GI-7
Fuel pressure check .............EC-QG-29, EC-SR-31
Fuel pressure regulator .........EC-QG-30, EC-SR-32
Fuel pressure release ...........EC-QG-29, EC-SR-31
Fuel pump .........................EC-QG-336, EC-SR-316
Fuel pump and gauge ......................................FE-7
Fuel pump relay ................EC-QG-336, EC-SR-316
Fuel system ......................................................FE-6
Fuel tank vacuum relief
valve ..................................EC-QG-26, EC-SR-28
Fuel temperature sensor .................EC-CD-17, 104
Fuse ..................................................EL-22, Foldout
Fuse block ....................................................Foldout
Fusible link ........................................EL-22, Foldout
G
Garage jack and safety stand .........................GI-47
Gauges..........................................................EL-138
Gear components (M/T) ...........................MT-16, 49
Generic scan tool (GST) .......EC-QG-66, EC-SR-78
GLOW - Wiring diagram ........................EC-CD-120
Glow plug .........................................EC-CD-15, 118
Glow relay ................................................EC-CD-15
GOVNR - Wiring diagram ........................EC-CD-79
Grille - See Exterior ........................................BT-38
Ground distribution..........................................EL-23
H
H/AIM - Wiring diagram ....................EL-87, 93, 200
Harness connector ............................................EL-6
Harness layout ..............................................EL-368
Hazard warning lamp ....................................EL-117
Headlamp..................................................EL-67, 69
Headlamp aiming control ................................EL-87
Headlamp washer .........................................EL-200
Headlining - See Roof trim .............................BT-25
Heated oxygen sensor (HO2S)
(front) ........................................EC-QG-132, 139,
EC-SR-144, 150, 156, 162, 170
Heated oxygen sensor (HO2S) heater
(front) .............................EC-QG-166, EC-SR-175
Heated oxygen sensor (HO2S) heater
(rear) ..............................EC-QG-203, EC-SR-207
Heated oxygen sensor (rear) ...............EC-QG-171,
EC-SR-180, 187,
194, 201
Heated oxygen sensor inspection ...........MA-27, 38
Heated seat .......................................BT-42, EL-234
HEATER - Wiring diagram .............................HA-40
HFC134a (R134a) system service
procedure ..................................................HA-100
HFC134a (R134a) system service tools ..........HA-8
H/LAMP - Wiring diagram ...............................EL-67
Hood..................................................................BT-5
Horn ..............................................................EL-203
HORN - Wiring diagram ................................EL-203
ALPHABETICAL INDEX
IDX-4

O
Oil cooler (engine) ....................................LC-20, 30
Oil pan (engine) ...............................EM-17, 70, 129
Oil pressure (engine)............................LC-5, 16, 27
Oil pump (engine).................................LC-5, 17, 27
Oil pump regulator valve (engine) ....................LC-7
Oil seal replacement
(engine) ................................EM-29, 84, 138, 139
On board diagnostic
system ...............................EC-QG-36, EC-SR-48
Operational check (cool box) .........................HA-24
P
Park/Neutral position
switch.............................EC-QG-313, EC-SR-298
Park/neutral position switch (A/T) ...................AT-48
Parking brake control .....................................BR-48
Parking lamp .................................................EL-100
PCV (positive crankcase
ventilation) .........................EC-QG-28, EC-SR-30
PCV system inspection............................MA-26, 36
Periodic maintenance (for Europe) ..................MA-6
PGC/V - Wiring diagram ...EC-QG-264, EC-SR-252
PHASE - Wiring diagram .......................EC-QG-240
Pilot bushing replacement - See Pilot
converter ...................................................EM-117
Piston assembly..............EM-53, 60, 110, 117, 167,
175, 176, 185, 193, 199
Piston pin inspection.............EM-54, 110, 168, 171,
185, 193, 199
Piston ring inspection ....................EM-54, 111, 168,
185, 193, 199
Piston to bore clearance........................EM-56, 174
PNP/SW - Wiring
diagram..........................EC-QG-315, EC-SR-300
POWER - Wiring diagram...............................EL-12
Power door lock ....................................EL-245, 265
Power door mirror .........................................EL-231
Power seat ....................................................EL-233
Power steering fluid level...............................MA-53
Power steering oil pressure
switch.............................EC-QG-342, EC-SR-321
Power supply routing ......................................EL-10
Power transistor......................................EC-SR-311
Power transistor & ignition coil ..............EC-SR-306
Power window ...............................................EL-236
Pre-delivery inspection.....................................MA-4
Precautions (General) .......................................GI-4
Pressure test (A/T) ..........................................AT-35
PST/SW - Wiring
diagram..........................EC-QG-343, EC-SR-322
R
Radiator ..........................................LC-9, 13, 25, 36Rear axle (disc brake type) ..............................RA-5
Rear bumper ...........................................BT-7, 9, 11
Rear combination lamp removal and
installation ...................................................BT-37
Rear disc brake ........................................BR-33, 40
Rear door ........................................................BT-14
Rear drum brake ............................................BR-44
Rear fog lamp................................................EL-112
Rear heated oxygen sensor
(HO2S) ..EC-QG-171, EC-SR-180, 187, 194, 201
Rear heated oxygen sensor (HO2S)
heater ............................EC-QG-203, EC-SR-207
Rear seat ........................................................BT-43
Rear seat belt ...................................................RS-4
Rear suspension ..............................................RA-4
Rear washer..................................................EL-193
Rear window ...................................................BT-53
Rear window defogger ..................................EL-207
Rear wiper.....................................................EL-193
Refrigerant connection precaution ...................HA-4
Refrigerant general precaution.........................HA-4
Refrigerant lines ...........................................HA-104
Refrigerant pressure
sensor....................EC-QG-299, 347, EC-SR-289
Refrigeration cycle..........................................HA-12
Removal and installation (A/T) ......................AT-116
Revolution sensor (A/T) ............................AT-61, 65
R/FOG - Wiring diagram ...............................EL-112
Roof trim .........................................................BT-25
RRO2 - Wiring
diagram.....................EC-QG-174, 183, 191, 199,
EC-SR-183, 190, 197, 203
RRO2/H - Wiring
diagram..........................EC-QG-205, EC-SR-209
S
SAE J1930 terminology list .............................GI-51
Seal - See Exterior .........................................BT-31
SEAT - Wiring diagram .................................EL-233
Seat belt inspection .......................................MA-54
Seat belt pre-tensioner ...................................RS-13
Seat belt pre-tensioner disposal ....................RS-27
Seat, front .......................................................BT-40
Self-diagnostic results ...........EC-QG-46, EC-SR-59
Shift control components (M/T) .........MT-17, 50, 74
Shock absorber (rear).....................................RA-11
Side air bag ....................................................RS-19
Side trim ..........................................................BT-18
Side window - See Rear side window ............BT-55
S/LOCK - Wiring diagram .....................EL-248, 270
Spark plug replacement...........................MA-25, 35
Speedometer ........................................EL-141, 146
Spiral cable.....................................................RS-14
Spot lamp..............................................EL-130, 131
SROOF - Wiring diagram .............................EL-230
SRS - See Supplemental Restraint
System ..........................................................RS-8
SRS - Wiring diagram ....................................RS-33
ALPHABETICAL INDEX
IDX-6

Cooling CircuitNCLC0016
System CheckNCLC0017WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could occur from high pressure fluid escaping from the
radiator.
Wrap a thick cloth around the cap. Slowly turn it a quarter turn
to allow built-up pressure to escape. Carefully remove the cap
by turning it all the way.
CHECKING COOLING SYSTEM HOSESNCLC0017S01
Check hoses for the following:

Improper attachment

Leaks

Cracks

Damage

Loose connections

Chafing

Deterioration
SEM939F Radiator
Water inlet
Thermostat
Thermostat housing
Water pump
Cylinder block
Cylinder head
Thermostat housing
Water outletThrottle bodyEGR valveHeater Reservoir tankThermostat: CLOSED
Thermostat: OPEN
ENGINE COOLING SYSTEMQG
Cooling Circuit
LC-8