1995 NISSAN ALMERA N15 Service Manual

•

Replace
dual-pressure
switch.
Note:

If
the result isNG after
checking circuitcontinuity,
repair harness orconnector.
NG
Note
Note
OK
OK
CHECK DUAL-PRESSURE SWITCH.
Refer toHA-64.
Disconnect thermocontrolamp.har-
ness connector.
CHECK
CIRCUIT CONTINUITY
BETWEEN ECM(ECCS CONTROL MOD.
ULE) HARNESS TERMINAL
@
or
@

AND DUAL-PRESSURE SWITCHHAR-
NESS TERMINAL @.
Continuity shouldexist.
If OK, check harness forshort.
OK
@ (Go to
m .)

Disconnect
ECM(ECCS contraImodule)
harness connector.
Disconnect dual-pressure switchhar-
ness connector.
CHECK CIRCUIT CONTINUITY BETWEEN
DUAL.PRESSURE SWITCHHARNESS
TERMINAL @AND THERMO CONTROL
AMP. HARNESS TERMINAL
@.

Continuity shouldexist.
If OK, check harness forshort.
Reconnect dual-pressure switchharness
connector.
o
CHECK
COILSIDECIRCUIT OFAIC No
Disconnect A/Crelay.
~
RELAY. Disconnect
ECM(ECCS
Do approx. 12volts exist between ECM control
module) harness
(ECCS control module) harnessterminal connector.

@
or@ and body ground?

l

Yes
~Note
CHECK CIRCUIT CONTI-
NUITY BETWEEN AIC
RELAY HARNESS TERMI-
NAL @AND ECM (ECCS
CONTROL MODULE)HAR-

.
NESSTERMINAL
@
or
@.
Continuity shouldexist.
(I) If
OK, check harness for
CHECK VOLTAGE FORECM (ECCS con- short.
tral module) .
Do approx. 12volts exist between ECM
NoCHECK ECM(ECCS con-
(ECCS
control module) harnessterminal

-..

@, or@ and body ground?
trolmodule). RefertoEC
section.
Yes
TROUBLE
DIAGNOSES
Diagnostic Procedure3(Conl'd)
@
~

I
Reconnect AICrelay. _

Ii
!

RHA359F
RHA362F
II

RHA361F
G
Dual-
pressure
switch
connector@
~.

S8

Thermo
control amp.

OOD
tm
@

•
:GA engine for
Australia :15 (Y)
Others :11 (G)
RHA360F

S8

Dual-
pressure
switch
connector
@

d))
~15@a

EGM (EGGS control
module) connec1or@
EGM
E[CONNECTORII

41 or21

.

II

•
:GA engine for
Australia: 15(Y)
Others :11 (G)
21: GAengine for
Australia (G)
41: Others (GY)

~&)
~Io

AlG relay EGM(EGGS control
connector@ module)connector@
ci
II
EGM
]g
CONNECTOR
II

Y

21: GAengine for
Australia (G)
41: Others (GY)

Ii

~i)@a~
EGM (EGGS control
module) connector @

II
EGM
]g
CONNECTOR
II

o
III

~i)
@a~

EGM (EGGS control
module) connector@

II
EGM 'gCONNECTORII

41 or21

.

RHA363F HA-55

~CONNECT ~
(gl

l41E) ~
@

EGM (EGGS control
module) connector
@

II
EGM
J9"CONNECTORII

11 TROUBLE
DIAGNOSES
Diagnostic Procedure3
(Co nt'd)

~ ~

I
Reconnect AICrelay_. _..._

II
!

EGM (EGGS control Dual-pressure
module) connector
@
switch connector
@

II
ECM
Ej'coNNEcTORII ~

11

GSHA734E
Note
CHECK CIRCUIT CONTINU-
ITY BETWEEN ECM(ECCS
CONTROL MODULE)HAR-
NESS TERMINAL @AND
DUAL-PRESSURE SWITCH
HARNESS TERMINAL
CD.

Continuity shouldexist.
If OK, check harness for
short. Disconnect
ECM(ECCS
control module) harness
connector. Disconnect dual-pressure
switch harness connector.

II

CHECK
COILSIDECIRCUIT OFAIC
RELAY.
Do approx. 12volts exist between ECM
(ECCS control module) harnesstermi.
nal @and body ground?
Yes
G

II

G
Dual-pressure switch
connector@ RHA446F
NC relay
connector@ ~OK
CHECK
DUAL-
PRES-
SURE
SWITCH. Refer to
HA-64. NG

--+
Replace
dual-
pressure
switch.
Note
"='RHA443F
~i)~@
EGM (EGGS control
module) connector@

II
EGM
E[CONNECTORII

44

L

R/L
L

RHA414F

II
CHECK VOLTAGE FORECM
(ECCS control module).
Do approx. 12volts exist between ECM
(ECCS control module) harnesstermi-
nal No.
@
and body ground?
Yes
Disconnect ECM(ECCS control mod-
ule) harness connector.
Disconnect thermocontrol amp.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(ECCS control
module). (RefertoEC sec-
tion.)
Yes

@

Note:
If the result isNG after checking circuilcontinuity, repairharness orconnec-
tor.
HA-56

Note

CHECK CIRCUIT CONTINUITY BETWEEN
ECM (ECCS CONTROL MODULE)HAR-
NESS TERMINAL
@
AND THERMO
CONTROL AMP.HARNESS TERMINAL

@.

Continuity shouldexist.

If OK, check harness forshort.

TROUBLE
DIAGNOSES
Diagnostic Procedure3(Cont'd)

@

t

RIL

EGM
(EGGS control
module) connector@
EGM
ECONNECTORII

44

RIL

Thermo
control
amp. connector ~

~ II

~OK

Reconnect thermocontrol amp.harness
connector.
Thermo control

,mp;""",,,
@~

LHD:
G/S'~
rrIDl
rJ.

RHD: GY
L-.D--J
1

Replacethermocontrol
amp.
Note

No

CHECK CIRCUIT CONTINUITY BETWEEN
THERMO CONTROL AMP.HARNESS
TERMINAL
@
AND AICSWITCH HAR-
NESS TERMINAL
@.

Continuity shouldexist.

If
OK.
check harness forshort. Note
Disconnect
AIC
switch harness connec-
tor.

CHECK
BODYGROUND CIRCUITFOR
THERMO CONTROL AMP.

Disconnect thermocontrol amp.harness
connector. Does continuity existbetween thermo
control amp.harness terminal @and
body ground?

CHECK
POWER SUPPLY FORTHERMO
CONTROL AMP.

Refer toHA-49.

LHD:
GIS

RHD: GY

RHA365F
RHA364F

A/G
switch
connector @

i55lJ

Thermo
control
amp. connector
@)

~

LHD:
GIS

RHD: GY

NG
switch
connector@

62J

LHD: G/Y
RHD: LG/S
Fan
switch
connector@

~
LHD: G/Y

RHD: LG/B

RHA366F OK
CHECK AICSWITCH.

Refer toHA-63.

OK

Disconnect fanswitch harness connec-
tor.
NoteReplace

AIC
switch.

•

CHECK CIRCUIT CONTINUITY BETWEEN
AIC SWITCH HARNESS TERMINAL
@

AND FANSWITCH HARNESS TERMINAL

@.

OK

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

HA-57

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)

CID
1

'="RHA367F
~iv@a

Fan switch
connector@

~
B

Note:

If
the result isNo after checking circuitcontinuity, repairharness orconnec-
tor.
HA-58

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