1995 NISSAN ALMERA N15 Service Manual

TROUBLEDIAGNOSES
Main Power Supply andGround CircuitCheck
POWER SUPPLY CIRCUIT CHECKFORAICSYSTEM

Check powersupply circuitforairconditioning system.

Refer to"POWER SUPPLYROUTING" inEL section andWiring
Diagram.

Voltmeterterminal

THERMO
CONTROL AMP.CHECK

Check powersupply circuitforthermo controlamp.withignition
switch ON.
1~ Disconnect thermocontrolamp.harness connector.
2. Connect voltmeter fromharness side.
3. Measure voltageacrossterminal No.
CD
and body ground.

Ohmmeter terminal

Turn

AIC
andfanswitches ON.Check bodyground circuitfor
thermo controlamp.
1. Disconnect thermocontrolamp.harness connector.
2. Connect ohmmeter fromharness side.
3. Check forcontinuity betweenterminalNo.@and body
ground.

~I()~

Thermo controlamp.
connector@

Lom ~

RHA341F
~Iv~

Thermo controlamp.
connector
@

;
~~.

LHD 2 \... ~

models:
GIS
Uw-i

RHD [][]

models: GY
Continuity exists:OK
'="RHA342F
EB

CD

EB

@

HA-49
e

Body ground

e

Body ground Voltage
Approx. 12V
Continuity
Yes

•

TROUBLEDIAGNOSES
INCIDENT Flow
chart
No.
1 Fan fails torotate.

rn

2 Fan
does notrotate at

[2J

1-speed.
3 Fan
does notrotate at
~
2-speed.
4 Fan
does notrotate at

[1J

3-speed.
5 Fan
does notrotate at

[2]

4-speed. Diagnostic
Procedure1

CD

@

@
@

(Go tonext page.)
Check 15A(No.
rn
and
No.
[2J)
fuses atfuse
block.
(Refer to"POWER SUP-
PLY ROUTING" inEL sec-
tion and Wiring Diagram.)
No
Ves
Check
ifblower motorrotates prop-
erly ateach fanspeed.
Conduct checksasper flow chart at
left.

rn

SYMPTOM:
Blowermotordoesnotrotate.
• Perform PRELIMINARY CHECK1before referring tothe fol-
lowing flowchart.
CHECK POWER SUPPLVFOR BLOWER
MOTOR.
Disconnect blowermotorharness con-
nector.
Do approx. 12volts existbetween
blower motorharness terminal No.
CD

and body ground?

LlW

~i5~

Blower motor
connector
@)

m

RHA343F
~ DISCONNECT

IV@a

Blower motor
connector
@)

~ ~Check
circuitcontinuity betweenblower
motor harness terminal No.@and
body ground.
~OK
CHECK BLOWER MOTOR.
(Refer toElectrical Components Inspec-
tion.) (HA-62) Reconnect
blowermotor
harness connector.

LIB
NG

I
Replace blowermotor.
RHA344F
@J

Resistor
connector@

[Qli1JJ

LIB
CHECK
BLOWER MOTORCIRCUIT
BETWEEN BLOWERMOTORAND
RESISTOR
Do approx. 12volts existbetween resis-
tor harness terminal No.
CD
and body
ground?
Ves No
Disconnect blowermotor
and resistor harness con-
nectors.
Note: If the result isNG after checking circuitcontinuity, repairharness orconnec-
tor. Note
Check circuit continuity
between blowermotor
harness terminal No.@
and resistor harness ter-
minal No.
(1).

Continuity shouldexist.
If OK, check harness for
short.

@

(Go tonext page.)
Disconnect
fanswitch harness connec-
tor.

LIB
RHA345F
Blower motor
connector@
~

LIB

Resistor
connector@
61iJ]
RHA346FHA-50

•

Note
Check circuit continuity betweenfanswitch
harness terminal No.@and body ground.

1
0K ~
@
CHECK RESISTOR AFTERDISCONNECT-
~
ING
IT.
(Refer toElectrical Components Inspec- @
tion.) (HA-63)

@]

@
OK NG

I
Replace resistor. @

.

Reconnect resistorharness connector.

ITJ
~
~
@]

~

Ii

CHECK FANSWITCH CIRCUIT.
Do approx. 12volts existbetween eachfanswitch
harness terminal andbody ground?
Flow chart Terminal
No.
No. Voltage

Ell
e

~
@

QJ
@

~ Body
ground Approx.
12V

@

~
@

Yes No

[!1
Note
Check circuit continuity
between fanswitch har-
ness terminal andresistor
harness terminal.
Terminal No.
Conti-
Fan Resistor nuity
switch

@
CD

@
~
Yes

@
CID

@ @

If OK, check harness for
short.
'-NG
CHECK FANSWITCH AFTERDIS-
H
Replace fanswitch.
CONNECTING IT.
(Refer toElectrical Components
Inspection.) (HA-62)
TROUBLE
DIAGNOSES
Diagnostic Procedure1(Cont'd)
@

1

RHA349F
.".
RHA347F
.". RHA348F
Resistor
conector@

[31\!:4Jli]

uy
'r'r\
LlR

LI~ 'LI~'

\
\
\

'I ,

_.1.1 __,

Fan
switch
connector
@

~
Fan switch
connector@

lQ~

UB UR71JLM

ff
I
I I
I

Ii

Note:
If
the result isNG after checking circuitcontinuity, repairharness orconnec-
tor.
HA-51

TROUBLEDIAGNOSES
RHA351F @

(Go tonext page.)

Note:
If the result isNG after checking circuitcontinuity, repairharness orconnec-
tor.
Diagnostic
Procedure2
SYMPTOM: Intakedoordoes notchange.

m
CHECK POWER SUPPLY FORINTAKE No
Check 7.5A(No.~)
DOOR MOTOR.
f-----.-

fuseatfuse block.
Disconnect intakedoormotor harness (Refer
to"POWER SUP-
connector. PLY
ROUTING" inEL sec-
Do approx. 12volts exist between intake tion
and Wiring Diagram.)
door motor harness terminal No.
G)

and body ground?
Yes

(;J
CHECK BODYGROUND CIRCUITFORNo
Disconnect recirculation
INT AKE DOOR MOTOR.
~

switch harness connector.
Turn recirculation switchON.Does con-
tinuity existbetween intakedoormotor
harness terminal
@
and body ground?

@J

Note
Turn recirculation switchOFF.Does
Checkcontinuity between
continuity existbetween intakedoor
recirculationswitchhar-
motor harness terminal
@
and body
nessterminal
G)
(@)

ground? andintake doormotor
Yes harnessterminal @

(@).
Continuity shouldexist.

If OK, check harness for
short.
OK
CHECK INTAKE DOORLINKAGE.
Refer toControl Linkage Adjustment.
(HA-65)
OK

I
Replace intakedoormotor.

GIS

Intake
doormotor
connector @
~

LGIRt
~JJ
1

RHA350F
Continuity shouldexistwhen
test leads areconnected asshown,
it should notexist when testleads
are reversed.

~i5@a~

Intake doormotor
connector@
~ LHDmodels
~15 Recirculation switch
connector@
~
GIS: LHOmodels
1-
GIY: LHOmodels

Y/S:
RHO mOdels' VIR:RHO models

I
I
I

'"

RHA352F

.-

I
I
I

Y/S
t
Y/R G/Y
t
GIS

rERl-¥1Jl
RHDmodels ~ LHOmodels
Intake doormotor
connector@
HA-52

Replacerecirculation
switch.
Note
Check circuit continuity betweenrecircu-
lation switch harness terminal No.@
and body ground.
Continuity shouldexist.
If OK, check harness forshort.
~OK
CHECK RECIRCULATION SWITCH.
(Refer toElectrical Components Inspec-
tion.) (HA-63)
TROUBLE
DIAGNOSES
Diagnostic Procedure2(Cont'd)
@

1

RHA353F

~15

Recirculation switch
connector ~

[5b

B
Note:
If
the result isNG after checking circuitcontinuity, repairharness orconnec-
tor ..

•

HA-53

TROUBLEDIAGNOSES
Diagnostic Procedure3
SYMPTOM: Magnetclutchdoesnotengage when
Ale

switch andfanswitch areON. -For GAand SR
engines
• Perform PRELIMINARY CHECK1before referring tothe fol-
lowing flowchart.
Replacemagnetclutch.
Refer toHA-77, HA-80.
Check
magnet clutchcoil.

NG

Yes

m

CHECK POWER SUPPLY FORCOMPRES-
SOR. Disconnect compressor harnessconnec-
tor. Do approx. 12volts existbetween com-
pressor harness terminal
ill
and body
ground?
RHA354F

s

Compressor
connector
@QD-2

~
RHA357FRHA356F
NG
CHECK POWER SUPPLY
CIRCUIT AND7.5A(No.

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

I

Replace thermalprotector.
[;J
Yes CHECK THERMAL PRO-
TECTOR.
Check circuit continuity
between thermalprotector
harness terminal
ill
and
compressor harnesstermi-
nal
ill.

Continuity shouldexist.
If OK, check harness for
shorl.
No
NG
CHECK
CIRCUIT CONTINUITY BETWEEN
AIC RELAY HARNESS TERMINAL @
AND THERMAL PROTECTOR HARNESS
TERMINAL
ill.

Continuity shouldexist.
If OK, check harness forshorl. Note
Yes
CHECK
POWER SUPPLY FORAIC
RELAY.
Disconnect AICrelay.
Do approx. 12volts exist!)etween AIC
relay harness terminals
ill,
@
and
body ground?
CHECK AICRELAY AFTER DISCON-
NECTING IT.
Refer toHA-64.
Disconnect
AICrelay. NoNo

[;)

CHECK POWER SUPPLY FORTHERMAL
PROTECTOR.
Disconnect thermalprotector harness
connector. Do approx. 12Vexist between thermal
protector harnessterminal
ill
and body
ground?
OK

@:
GAengine (forEurope, Israeland
Australia) andSRengine

@:
Except above
RHA355F

~ i5@a

Thermal protector
AIC
relay
connector
@-1
connector
(ill)

,"R~~t
[1[]

lIR
lIR
Thermal
protector
connector
@QD-1

~
Thermal protector Compressor
connector
@QD-1
connector
@QD-2

~ ~

~ ~ ls

~

~15~
AlC relay
connector
(ill)

~lIY
RHA358FNote:
If the result isNG after checking circuitcontinuity, repairharness orconnec-
tor.
HA-54