1987 NISSAN PULSAR mirror

Cooling and Heating Systems
11. BLOWER FAN
TO REMOVE AND INSTAL
(1) Disconnect the negative battery terminal.
(2) Working below the glov e compartment, dis-
connect the wiring connector to the blower fan motor.
(3) Remove the bolts retaining the blower fan
motor and carefully lower the motor while disconnect-
ing the drain hose.

Installation is a reversal of the removal procedure
with attention to the following points:
( t ) Tighten all bolts securely.
(2) Check that the blow er fan operates correctly.

Dismantled view of the blower fan and associated
components.
12. AIR CONDITIONING
DESCRIPTION
The air conditioning system, when used in con-
junction with the heater, enables any reasonable tem-
perature to be achieved inside the vehicle. It can also
reduce the humidity of the incoming air, aiding
demisting even when cooling is not required.

The basic components of the air conditioning sys-
tem are an evaporator, co ndenser, compressor, re-
ceiver/dryer, expansion valve and pipes and hoses
carrying the refrigerant through the system. Various
subsidiary controls and sensors are also utilized to
protect the system against low or high pressure and
excessive temperature.

The refrigerant will boil at a very low tempera-
ture (-33 deg C) and therefore must be contained
under pressure. Escaping refrigerant can cause frost-
bite and eye damage and will produce a poisonous gas
when burnt. Also, if the system suffers a rapid loss of
refrigerant, oil from the compressor may be carried
out with the refrigerant. It is recommended that any
work requiring disconnection of the components be
referred to an au thorized dealer.

In the event of major repair s to the vehicle such as
engine removal, the compress or hoses are of sufficient


Schematic diagram of a typical air conditioning
system.
length to allow the compressor to be removed as the
engine is lowered from the engine compartment with-
out disturbing any refrigerant line connections.

If the operation of the air conditioning system is
in doubt, it is recommended that the vehicle be taken
to an authorized dealer for testing and repair.

TO CHECK REFRIGERANT CHARGE
(1) Start the engine and operate the air condi-
tioner on maximum cooling for a few minutes.
(2) Observe the flow of refrigerant through the
sight glass located at the top of the receiver/dryer. On
some models it may be necessary to use a mirror to
see the sight glass. (3) If the system is operating correctly, the sight
glass will be clear during the operation of the com-
pressor. Occasional bubbles may be seen when the
compressor cycles on and off during operation, but a
NUT j-
Bubbles in the sight glass when the air conditioner is
operating indicates a low refrigerant charge.

Emission Control 119

(4) Remove the charcoal canister as previously
described under the heading To Renew Charcoal
Canister. (5) Shake the canister, there should no audible
carbon movement. If there is, renew the canister. (6) Check the purge valve by applying 20-35
kPa of vacuum with a hand pump to the control port. Using a piece of hose, blow through the purge
hose connection. If this is not possible, renew the
canister.

Remove the vacuum source and blow air through
the purge hose connection. If this is possible, renew
the canister.

(7) Apply 20-35 kPa air pressure into the fuel
tank connector. Air should flow freely from all the
other connectors.

If poor air flow through the drain tube exists,
block off the fuel tank tube and blow compressed air
at approximately 300 kPa through the purge port.
Check the air flow and if st ill poor, renew the canister.

(8) Apply 20-35 kPa air pressure to any one of
the canister ports except th e purge valve control port
and with the other ports blocked, ensure that there are
no leaks from the canister. If leaks exist, renew the
canister. (9) Remove the fuel check valve as previously
described under the heading To Renew Fuel Check
Valve. (10) Blow through the check valve from the side
that is connected to the fu el tank hose. Considerable
resistance should be felt with only a small amount of
air passing through the valve. If no resistance is felt or
if the valve is blocked renew the fuel check valve.
(11) Blow air through the fuel check valve from
the opposite end. There should be a smooth flow of air
through the valve. If the valve is blocked, renew the
fuel check valve.
3. AIR PREHEAT SYSTEM — 1.6 LITRE
ENGINE
DESCRIPTION
To reduce emissions and improve drivability
when the engine is cold, hot air is drawn into the air
cleaner from a heat shield which partially surrounds
the exhaust manifold.

When the ambient temperature is below 30°C, the
thermal vacuum valve, which is located inside the air
cleaner housing, allows vacuum to operate a servo
actuated flap in the air cleaner intake duct. When the
flap closes, hot air is dr awn from the exhaust heat
shield, through the hot air inlet tube into the air
cleaner intake duct.

When the ambient temperature is above 30°C,
the flap in the air cleaner intake duct opens allowing
cool air to enter the air cleaner.


View of the air preheat system components. 1.6 liter
engine.
TO CHECK OPERATION
(1) When the engine is cold, use a mirror to
check that the passage from the hot air inlet tube is
closed by the flap.
(2) Start and run the engi ne at approximately
1 200 rpm. The hot air inlet passage should now be
open, allowing hot air from the exhaust heat shield to
be drawn into the air cleaner. (3) Allow the engine to idle for fifteen minutes
and inspect the position of th e air cleaner intake flap.
The flap should now be in the open position allowing
cool air to be drawn into the air cleaner and shutting
oft' air from the exhaust manifold heat shield.
TO CHECK COMPONENTS

(1) Disconnect the vacuum hose from the servo
unit and connect a vacuum pump to the unit.

When the vacuum is applied to the servo unit, the
flap in the air cleaner intake duct should close.

When the vacuum is removed, the flap should
open.


View of the air cleaner raised showing the engine
ventilation hose and the thermal vacuum valve supply
hose connection. 1.6 liter engine.

Electrical System 207

Disconnect the wiring connectors from the
rear of the combination switch.
Loosen the clamping screw located at the left
hand side of the combination switch. Push, turn and slide the combination switch
from the steering column. Installation is a reversal of the removal procedure.

REAR WINDOW DEMISTER
SWITCH/HAZARD WARNING LAMP SWITCH

To Remove and Install
Disconnect the negative battery terminal.
Using two small flat bladed screwdrivers,
carefully lever the edges of the switch forward to
release it from the instrument cluster surround.
Withdraw the switch from the surround and
disconnect the switch wiri ng at the connectors.
Installation is a reversal of the removal procedure.


View of the hazard warning switch removed from the
instrument cluster surround.
DOOR LOCKS AND POWER WINDOW
SWITCHES

To Remove and Install
Disconnect the negative battery terminal.
Loosen the retaining screws securing the
armrest to the door. Using a small flat bladed screwdriver, care-
fully lever the front edge of the switch panel up and
maneuver the switch forward and away from the
armrest. Disconnect the wiring connector and remove
the switch from the armrest. Installation is a reversal of the removal procedure.

POWER MIRRORS AND INSTRUMENT
ILLUMINATION SWITCHES

To Remove and Install
Disconnect the negative battery terminal.
Using two small flat bladed screwdrivers,

View of the power mirror switch removed from the
vehicle.
carefully lever the edges of the switch forward to
release it from the fascia lo cated directly above the
fuse box.

(3) Withdraw the switch from the fascia and
disconnect the wiring.

Installation is a reversal of the removal procedure.
REAR WINDOW WIPER/WASHER SWITCH
To Remove and Install
Disconnect the negative battery terminal.
Using two small flat bladed screwdrivers,
carefully lever the edges of the switch forward to
release it from the instrument cluster surround. Withdraw the switch from the surround and
disconnect the wiring.
Installation is a reversal of the removal procedure.


View of the rear window wiper/washer switch re-
moved from the vehicle.

Electrical System 223

Wiring diagram (WD5) for the mirrors, cigarette lighter and door lock circuits.
COLOUR CODE
The first letter of the code
represents the main wire color,
the other letters represent the
trace colors.

B - BLACK
L - BLUE
G - GREEN
R - RED
Y - YELLOW
W - WHITE
N - BROWN
O - ORANGE
K - PINK
S - GREY V - VIOLET
P - PURPLE X - LIGHT GREEN
Z - LIGHT BLUE
M - DARK GREEN
T - DARK BLUE
A - LIGHT BROWN
E - SLATE
D - TAN

KEY 1. Accessories relay
2. R H power mirror 3. L H power mirror
4. Power mirror switch
5. Fuse No. 3 ACC
6. Fuse No. 4 ACC
7. Fuse No. 5 ACC
8. Fuse No 21 B
9. Cigarette lighter
10. To No. 13 WD6
11. To No. 2 WD3
12. Door lock timer
13. Front door lock switch
14. Key lock switch
15. Door lock switch
16. L H front door lock solenoid
17. R H rear door lock solenoid
18. L H rear door lock
solenoid

228 Body


Installed view of the front door lock striker plate.
engages the striker plate, loosen the retaining screws
and move the striker plate up or down to eliminate
the lift or drop.

Installation is a reversal of the removal procedure
with attention to the following points:

Ensure that the seal is in a serviceable
condition and correctly installed to prevent the entry
of dust and water. Tighten all the screws securely.
3. REAR DOORS

INTERIOR HANDLES AND TRIM PANEL
To Remove and Install
On models with manual windows, carefully
prise out the armrest trim plugs and remove the
retaining screws. Withdraw the armrest from the
vehicle. On models with power windows, proceed as
follows:
Carefully prise out the armrest trim plugs
and remove the retaining screws. Hold the armrest away from the door trim
panel as much as possible and lever the window
switches out from the armrest, front end first.
Lift the switches and disconnect the wiring
connector. Remove the hidden screw, working through
the switch aperture. Withdraw the armrest from the
vehicle. (3) Remove the screw retaining the remote con-


EXTERNAL MIRROR
To Remove and Install

On models with manual mirrors, remove the
screw retaining the adjuster arm handle and withdraw
the handle. Carefully prise out the cover trim plate and
remove the retaining screws securing the mirror body
to the door. On models with power mirrors, disconnect
the mirror wiring connector. Withdraw the external mirror and seal from
the door.

Rear door with the trim panel and plastic sealing sheet
removed.
SNIPPER BUTTON
REMOTE CONTROL

Dismantled view of the power door mirror.