NISSAN ALMERA N15 1995 Service Manual

TROUBLEDIAGNOSES
Diagnostic Procedure3(Cont'd)
SYMPTOM: Magnetclutchdoesnotengage whenAle
switch andfanswitch areON. -For CDengine
• Perform PRELIMINARY CHECK1before referring tothe fol-
lowing flowchart.
Compressor
connector
@Q7>-2

~ B
Thermal protector
connector
@Q7>-1

~

LlR
RHA354F
RHA355F
m

CHECK POWER SUPPLY FORCOMPRES-
SOR. Disconnect compressor harnessconnec-
tor. Do approx. 12volts exist between com-
pressor harness terminal
CD
and body
ground?
No
(;J
CHECK POWER SUPPLY FORTHERMAL
PROTECTOR.
Disconnect thermalprotector harness
connector. Do approx. 12Vexist between thermal
protector harnessterminal
G)
and body
ground?
NoYes
Check magnet clutchcoil.
OK
Replace magnetclutch.
Refer toHA-77.

[!]

Yes CHECK THERMAL PRO-
TECTOR. Check circuitcontinuity
between thermalprotector
harness terminal
G)
and
compressor harnesstermi-
nal
CD.

Continuity shouldexist.
If OK. check harness for
short.
NG
Disconnect AICrelay.
I

Replace thermalprotector.
Thermal protector Compressor
connector@-1 connector@QD-2

j. ~~
1-

I1iJ

RHA356F Note
CHECK CIRCUIT CONTINUITY BETWEEN
AIC RELAY HARNESS TERMINAL
@)

AND THERMAL PROTECTOR HARNESS
TERMINAL G).
Continuity shouldexist.
If OK. check harness forshort.
OK
Thermal
protector AlCrelay
connector @:>-1connector
@])

~ ciP

~/R ~
1

~L1R
RHA357FCHECK
POWER SUPPLY FORAIC
RELAY.
Disconnect AICrelay.
Do approx. 12volts exist between AIC
relay harness terminals
CD.
@and
body ground?
Yes
CHECK AICRELAY AFTERDISCON-
NECTING IT.
Refer toHA-64. No
NG CHECK
POWER SUPPLY
CIRCUIT AND7.5A(No.

~J
and
00)
FUSES AT
FUSE BLOCK.
Refer toEL section ("Wir-
ing Diagram", "POWER
SUPPLY ROUTING").
Replace AICrelay.

•

RHA358F OK

@

(Go tonext page.)
Note:
If
the result isNG orNo after checking circuitcontinuity, repairharness or
connector.
HA-59

DisconnectECM(Engine
control module) harness
connector. Disconnect dual-pressure
switch harness connector .

Ii

~i)~@
ECM (Engine control
module) connector
@

II
ECM
E[CONNECTORII

8

G TROUBLE
DIAGNOSES
Diagnostic Procedure3(Cont'd)

@

+
I
Reconnect AICrelay.

Ii
r---

CHECK COILSIDECIRCUIT OFAIC No
RELAY.
Do approx. 12Yolts existbetween ECM
(Engine controlmodule) harnesstermi-
nal
@
and body ground?
G
G
ECM
(Engine control Dual-pressure
module) connector ~switch connector
@)

II
ECM
HCONNECTORII ~

8
[iJ
Note
CHECK CIRCUIT CONTINU-
ITY BETWEEN ECM
(ENGINE CONTROL MOD-
ULE) HARNESS TERMINAL
@ AND DUAL-PRESSURE
SWITCH HARNESS TERMI-
NAL G).
Continuity shouldexist.
If OK, check harness for
short.
Yes
....
RHA370F
OK
Dual-pressure switch
connector@ RHA368F
AlC relay
connector@ CHECK
DUAL-
PRES-
SURE
SWITCH. Refer to
HA-64.
NG

Replace
dual-
pressure
switch.
Note
~i5~~
ECM
11
CONNECTOR
II

31

o
L

II

ECM
(Engine control
AIL

module)@ L
RHA414F

o
CHECK VOLTAGE FORECM (Engine
control unit).
Do approx. 12YOIts exist between ECM
(Engine controlmodule) Ilarnesstermi-
nal No.
@
and body ground?
Yes

-=
Disconnect ECM(Engine controlmod-
ZHA158AA ule)harness connector.
Disconnect thermocontrolamp.har-
ness connector. No
CHECK
CIRCUIT CONTINU-
ITY BETWEEN AICRELAY
HARNESS TERMINAL
@

AND DUAL-PRESSURE
SWITCH HARNESS TERMI-
NAL
@.

Continuity shouldexist.
If OK, check harness for
short.
CHECK ECM(Engine con-
trol module). (RefertoEC
section.)
@
(Go tonext page.)
Note:
If the result isNG orNo after checking circuitcontinuity, repairharness or
connector.
HA-60

Replacethermocontrol
amp.
Note
No Note
CHECK POWER SUPPLY FORTHERMO
Co"NTROL AMP.
Refer toHA-49.
Reconnect
thermocontrolamp.harness
connector.
CHECK BODYGROUND CIRCUITFOR
THERMO CONTROL AMP.
Disconnect thermocontrolamp.harness
connector.
Does continuity existbetween thermo
control amp.harness terminal
@
and
body ground? OK
CHECK
CIRCUIT CONTINUITY BETWEEN
ECM (ENGINE CONTROL MODULE)
HARNESS TERMINAL @AND THERMO
CONTROL AMP.HARNESS TERMINAL
@.
Continuity shouldexist.
If OK, check harness forshort.

II

TROUBLE
DIAGNOSES
Diagnostic Procedure3(Conl'd)

(!)
~

RHA364F

:~~~~~;;:~:
@)~

LHO:
G/S'~
rn
(l

RHO: GY'L-.D--J
1

Thermo
control ECM(Engine control
amp. connector@) module)connector
@

~ II
ECM ?,CONNECTOOII

I
AIL ~_tR/L

II

II
DisconnectAICswitch harness connec-

tor.

Thermo
control
amp. connector @)
~
A/C

switch
connector
@

~
II
Note
LHO: GIS
RHO: GY LHO:
GIS
RHO: GY
RHA365F CHECK
CIRCUIT CONTINUITY BETWEEN
THERMO CONTROL AMP.HARNESS
TERMINAL
@
AND AICSWITCH HAR-
NESS TERMINAL
@.

Continuity shouldexist.
If OK, check harness forshort.

•

Replace
AICswitch.
Note
OK
OK
CHECK
AICSWITCH.
Refer toHA-63.
Disconnect fanswitch harness connec-
tor.
LHO: G/Y
RHO: LG/S
Fan
switch
connector
@ID

~
RHA366F CHECKCIRCUIT CONTINUITY BETWEEN
AIC SWITCH HARNESS TERMINAL @
AND FANSWITCH HARNESS TERMINAL

@.

Continuity shouldexist.
If OK, check harness forshort.
NC
switch
connector@

[ij

LHO: G/Y
RHO: LG/S
OK

@

(Go tonext page.)
Note:

If
the result isNG orNo after checking circuitcontinuity, repairharness or
connector.
HA-61

Replacefanswitch.
NG
Note
CHECK BODYGROUND CIRCUITFOR
FAN SWITCH.
Does continuity existbetween fanswitch
harness terminal
@
and body ground?
Yes
CHECK FANSWITCH.
Refer toHA-62.
TROUBLE
DIAGNOSES
Diagnostic Procedure3(Cont'd)

@

1

'="RHA367F

~15@a

Fan switch
connector@

~ B

Note:
If the result isNG orNo after checking circuitcontinuity, repairharness or
connector.

Electrical Components Inspection
FAN SWITCH

Check continuity betweenterminals ateach switch position.

RHA325F
LEVER
POSITION
OFF
1

2

3

4 Continuity
betweenterminals

@-@-@
@----@-@

@
-------@ -
@

@
----------@ -
@

BLOWER MOTOR

Confirm smoothrotationofthe blower motor.
• Ensure thatthere arenoforeign particles insidetheintake
unit.

HA-62

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