1995 NISSAN ALMERA N15 Service Manual

Circuitcheck
~
AlC switch
connector TROUBLE
DIAGNOSES
Electrical Components Inspection(Cont'd)
BLOWER RESISTOR

Check resistance betweenterminals.

Terminal No.
Resistance

EB
8

@
Approx.1.4-1.6Q

@
(1)

Approx.2.5-2.8Q

@
Approx.0.5-0.6Q

AIC SWITCH

Check continuity betweenterminals ateach switch position.

.
Switch
condition TerminalNo.
Continuity

A/C
EB
e

ON Yes

@
@

OFF No

RHA328F RECIRCULATION SWITCH

Check continuity betweenterminals ateach switch position.

I
I
I
I
I

'-

SHA732E
Terminal
No.
Recirculation
switch condition Continuity

EB
e

ON Yes

(1)
@

OFF No
ON No

@ @

OFF Yes

THERMAL PROTECTOR

THERMO CONTROL AMP.

1. Run engine, andoperate
AIC
system.
2. Connect thevoltmeter fromharness side.
3. Check thermo controlamp.operation showninthe table.

Evaporator outletairtemperature Thermoamp.
Tester
°C CF) operation
Decreasing to2.5 -3.5 (37-38) TurnOFF Approx.
12V
Increasing to4.0 -5.0 (39-41) Turn
On Approx.OV
Temperature
ofcompressor

°C
(OF)

Increasing toapprox. 145-155 (293 -311)
Decreasing toapprox. 130-140 (266 -284) Compressor
operation
Turn OFF
Turn ON

•

HA-63

TROUBLEDIAGNOSES
Electrical Components Inspection(Cont'd)
AIC RELAY

Check continuity betweenterminals
and
CID.

AHA233
Conditions
12V direct current supplybetween terminals
G)

and
@

No current supply
If NG, replace relay. Continuity

YesNo
Dual-pressure
switch connector
SHA522EDUAL-PRESSURE
SWITCH

ON OFF
kPa (bar,
kg/cm
2,
psi)
kPa(bar,
kg/cm
2,
psi)
Low-pressure Increasing
to
Decreasingto

157 -216 (1.57 -2.16,
157-196 (1.57-1.96,

side

1.6-2.2,23 -31)
1.6-2.0,23 -28)

High-pressure Decreasing
to
Increasingto

1,863 -2,256 (18.6-22.6,
2,452-2,844 (24.5-28.4,

side

19-23, 270 -327)
25-29, 356 -412)
Control Linkage Adjustment
MODE CONTROL CABLE

1. For RHO models, turnthemode control knobtothe VENT
position.
For LHO models, turnthemode control knobtothe OEF
position.
2. For RHO models, setthe side linkinthe VENT position by
hand.
For LHO models, setthe side linkinthe OEF position by
hand.
3. Pullan thecable cover inthe direction ofthe arrow, then
clamp it.

After positioning controlcable,checkthatitoperates properly.
WATER COCKCONTROL ROD
• When adjusting watercockcontrol rod,firstdisconnect tem-
perature controlcablefromairmix door lever andthen
adjust control rod.Reconnect temperature controlcable
and readjust it.(Refer toTEMPERATURE CONTROL
CABLE.)

1. Push airmix door lever indirection ofarrow.
2. Pull control rodofwater cockindirection ofarrow soasto
make clearance ofabout 2mm (0.08 in)between endsofrod
and linklever andconnect therod todoor lever.

After connecting controlrod,check itoperates properly.
HA-64

TROUBLEDIAGNOSES
Control Linkage Adjustment (Cont'd)
TEMPERATURE CONTROLCABLE

1. For RHO models, movethetemperature controlknobtothe
full cold position.
For LHO models, movethetemperature controlknobtothe
full hotposition.
2. For RHO models, setthe airmix door lever inthe fullcold
position.
For LHO models, setthe airmix door lever inthe full hot
position.
3. Pull onthe cable cover inthe direction ofthe arrow, then
clamp it.

After positioning controlcable,checkthatitoperates properly.
INTAKE DOORMOTOR

1. Install intakedoormotor onintake unit.
Ensure thattheintake doormotor leverisfitted intotheslit
portion ofintake doorlink.
2. Connect theintake doormotor harness connector.
3. Turn ignition switchtoON.
4. Check thatintake dooroperates properlywhenRECswitch
is turned ONand OFF.

ZHA178A
RHA331F System
Description
INTAKE DOORMOTOR

The intake doormotor isinstalled onthe intake unit.Using a
link itopens andcloses theintake door.
When RECIRCULATION switchisON, theground lineofthe
motor isswitched fromterminal
@
to
@.
This starts themotor
because theposition switchcontacts builtintoitmake current •
flow. When RECIRCULATION switchisOFF, theground lineis •
switched fromterminal
@
to
@.
The contacts turnalong with
the motor. Whentheyreach thenon-current flowposition, the
motor willstop. Themotor always turnsinthe same direction.

LHD:

u:Eh!.IJ

RHD:
o::EhhJ

---I

I

~----j Intake door
molar
HA-65

SERVICEPROCEDURES
HFC-134a (R-134a)ServiceProcedure
SETTING OFSERVICE TOOLSANDEQUIPMENT
DISCHARGING REFRIGERANT

WARNING:
Avoid breathing
A/C
refrigerant andlubricant vaporormist. Exposure mayirritate eyes,noseandthroat.
Remove HFC-134a (R-134a)from
A/C
system usingcertified serviceequipment meetingrequirements
of HFC-134a (R-134a)recycling equipment orHFC-134a (R-134a)recovery equipment. Ifaccidental sys-
tem discharge occurs,ventilate workareabefore resuming service.Additional healthandsafety infor-
mation maybeobtained fromrefrigerant andlubricant manufacturers.

Example

I-,
V ~I~e service
I~ ~
..
_----~

Recovery/Recycling/Recharging equipment
SHA539DC
EVACUATING SYSTEMANDCHARGING REFRIGERANT
Example

Preferred (Best)method Alternate
method

Manifoldgaugeset
SHA540DC
HA-66

Recoveredlubricant(HA-68)
SERVICE
PROCEDURES
HFC-134a (R-134a)ServiceProcedure (Cont'd)

Set therecoverylrecycling equip-
ment.
Discharge refrigerant into
recoveryl

recycling equipment.
Repair orreplace parts.
Evacuate theunwanted airincharg-
ing hoses.
Evacuating (over25minutes).
Check airtightness.

I

Partial charging
[approx. 200g(7.05 oz)J.
'-1
Repair.
Preliminary refrigerantleakcheck.

,-1

Complete charging[specified
amount -200 g(7.05 oz)J. Repair.

'-2

---C-h-e-c-k-f-o-r -re-f-r-ig-e-r-a-nt-Ie-a-k-s-.
--H
Repair.

--r.---~. '---.---

Check for
AIC
operation and
AIC

cooling performance
Remove servicecouplers from
AIC

service valves.
Recover refrigerant incharging
hoses.
Remove servicetools.
Note: '-1Before charging refrigerant, ensureengineisoff.
'-2 Before checking forleaks, startengine toactivate airconditioning systemthenturnitoff.
Service valvecapsmustbeattached tovalves (toprevent leakage).

HA-67
•

SERVICEPROCEDURES

Maintenance ofLubricant Quantityin
Compressor

The lubricant inthe compressor circulatesthroughthesystem
with therefrigerant. Addlubricant tocompressor whenreplac-
ing any component orafter alarge gasleakage occurred. Itis
important tomaintain thespecified amount.
If lubricant quantityisnot maintained properly,thefollowing
malfunctions mayresult:
• Lack oflubricant: Maylead toaseized compressor
• Excessive lubricant:Inadequate cooling(thermal exchange
interference)

LUBRICANT

Name: Nissan
Ale
System OilType R
Part number:
KLHOO-PAGRO

CHECKING ANDADJUSTING

Adjust thelubricant quantityaccording tothe flowchart shown
below.

START
~

Can lubricant returnoperation beper- Yes
Perform lubricant returnoperation, proceeding asfollows:
formed?
-+

• AIC
system worksproperly. 1.Start engine, andsetthefollowing conditions:
• There isno evidence ofalarge amount •Test condition
of lubricant leakage. Engine
speed:Idlingto1,200 rpm
AlC orAUTO switch: ON
No Blowerspeed:Max.position
Temp. control: Optional [Setsothat Intake airtemperature is
25 to30°C (77to86°F).]
2. Next itemisfor V-5 orV-6 compressor. Connectthemanifold
gauge, andcheck thatthehigh pressure sidepressure is588 kPa
(5.9 bar, 6kg/cm
2,
85psi) orhigher,

If
less than thereference level,attach acover tothe front faceof

~
the
condenser toraise thepressure.
Should thecompressor bereplaced?
3.

Perform lubricant returnoperation forabout 10minutes.

4.
Stop engine.
No Yes
CAUTION:

If
excessive lubricantleakageisnoted, donot perform thelubricant
return operation.

@

(Go tonext page.)
Is there anypart tobe replaced? Yes
Afterreplacing anyof.the following majorcomponents, addthecor-
(Evaporator, condenser,liquidtankorin
-..

rectamount oflubricant tothe system.
case there isevidence ofalarge amount Amountoflubricant tobe added
of lubricant leakage.)

Lubricanttobe added to

No
Part
replaced system
Remarks
Amount oflubricant
mf (Imp IIoz)
Evaporator 75(2.6)

-

Condenser 75(2.6)
-

Liquid tank 5(0.2) Add
ifcompressor isnot
replaced. '1

Carry outthe
AIC
performance test.

~
In
case ofrefrigerant leak 30
(11) Largeleak

-
Small
leak'2

.

*1:Ifcompressor isreplaced. additionoflubricant isincluded inthe
flow chart.
*2: Ifrefrigerant leakissmall, noaddition oflubricant isneeded.

HA-68

SERVICEPROCEDURES
Maintenance ofLubricant Quantityin
Compressor (Cont'd)
@

1. Discharge refrigerant intotherefrigerant recovery/recycling equipment.Measurelubricantdischarged intothe
recovery/ recyclingequipment.
2. Remove thedrain plugofthe "old" (removed) compressor (applicableonlytoV-5, V-6orDKS-16H compressor).
Drain thelubricant intoagraduated containerandrecord theamount ofdrained lubricant.
3. Remove thedrain pluganddrain thelubricant fromthe"new" compressor intoaseparate, cleancontainer.
4. Measure anamount ofnew lubricant installedequaltoamount drained from"old" compressor. Addthislubricant to
"new" compressor throughthesuction portopening.
5. Measure anamount ofnew lubricant equaltothe amount recovered duringdischarging. Addthislubricant to"new"
compressor throughthesuction portopening.
6. Torque thedrain plug.
V.5 orV-6 compressor: 18-19 N'm (1.8-1.9 kg-m, 13-14 ft-Ib)
DKS.16H compressor: 14-16 N'm (1.4-1.6 kg-in, 10-12 ft-Ib)
7. Ifthe liquid tankalso needs tobe replaced, addanadditional 5mC (0.2 Imp IIoz) oflubricant atthis time.
Do not add this5m C(0.2 ImpIIoz) oflubricant ifonly replacing thecompressor.

Lubricant adjustingprocedure forcompressor replacement

DO DO

Oldcompressor
Recovery/
Recycling
eqUipment

!
Roo'"
,m,,",
1
R,,,,'
,moo",

,--------------------,

I I

I I

I + I

I "Y"I

I "X"
mQ
I

I
mQ
I

I I

L ~
New
compressor
Drainlubricant
from new
compressor
into clean
container

------ L-...
.J

New
compressor
HA-69
Reinstall
"X"m
Q
+
"Y"m
Q

of new lubricant

-.-------

fAdda;-addition;;
"I

15m
Q
(0.2 USfl
Ol,

I 0.2
Imp
fl
Ol)
of
I

I new lubricant when
I

!
replacing liquid I
, tank. I

1- -__ I
New
lubricant
RHA065DD
•

SERVICEPROCEDURES
Refrigerant Lines

• Refer topage HA-4regarding "Precautions forRefrigerant
Connection" .

GA ENGINE
RHO
MODEL

SEC. 271.274.276

fil10'20(1.0 .2.0, 87.174)
8
mm
dia.

Liquidtank
Condenser Expansion
valve

[O;J
15-25 (1.5 -2.5, 11-18)
12
mm
dia.

Low-pressure(Suction)
service valve

o
(Tightening torque)

o
0
(Wrench size)

o
(O-ring size)

[O;J :
N.m (kg-m, ft-Ib)

rn :
20 •29 (2.0 •3.0, 14-22)

fiI :
N.m (kg-m, in-Ib)

IBl :
8 •11 (0.8 -1.1, 69-95)

[C] :
10 -20 (1.0 -2.0, 87-174)
~ :3 -4 (0.3 -0.4, 26-35)

RHA332F
HA-70