1995 NISSAN ALMERA N15 Service Manual

TROUBLEDIAGNOSES
Cooling FanControl (Cont'd)
@

~i5
~
rntJ

Cooling fan
relay. 2,3
SEF168R
SEF959P
CHECK
COMPONENT
(Cooling fanmotors).
Refer to"COMPONENT INSPECTION".
(See page EC-412.)

OK

Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.

I
PROCEDURE D

INSPECTION START
CHECK POWER SUPPLY.
1) Turn ignition switch"OFF".
2) Disconnect coolingfanrelay-2 and
cooling fanrelay-3.
3) Turn ignition switch"ON".
4) Check voltage between coolingfan
relay-2, 3terminals
(!J,
@
and
ground.

Voltage: Batteryvoltage
OK

EC-41 0
NG
NG
Replace
coolingfan
motors.
Check thefollowing.
• Harness connectors

(ill!)

• 10A fuse
• 30A fusible links
• 75A fusible link
• Harness continuity
between coolingfan
relay-2, 3and fuse
• Harness continuity
between coolingfan
relay-2, 3and battery
If NG, repair harness or
connectors.

TROUBLEDIAGNOSES
Cooling FanControl (Cont'd)

@

•

1

CHECK GROUND CIRCUIT. NG
Repair harness orcon-
1) Turn ignition switch"OFF".
---...

nectors.
2) Disconnect coolingfanmotor-1 har-
ness connector andcooling fan
motor-2, 3harness connectors.

1:1
3)Check harness continuity
between terminal
@
and termi-
nal
@,
terminal
@
and termi-
nal
@,
terminal
iJ)
and body
ground.

Continuity should
exisl.
OK

0
-

CHECK OUTPUT SIGNALCIRCUIT NG
Check thefollowing.
1) Disconnect ECMharness connector.
---..

•Harness connectors
2) Check harness continuity between
@!D,@

ECM terminal
@
and terminal
@.
•Harness continuity

Continuity should
exisl. betweencoolingfan
OK relay-2,
3and ECM
If NG, repair harness or
connectors.
CHECK COMPONENT NG
Replace coolingfan
(Cooling fanrelay-2, 3).
f----+

relays.
Refer to"COMPONENT INSPECTION"
on next page.
OK
CHECK COMPONENTS NG
Replace coolingfan
(Cooling fanmotors).
f----+

motors.
Refer to"COMPONENT INSPECTION"
on next page.
OK
Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.

SEF960P
SEF043Q

AG<

\lliJ

Cooling
fan motor

-2,3

harness
connector

~i5

:~-

[W=ill

Cooling fan
relay-2

~i5

ECM ~CONNECTOR
II

10

II

1:1

o

EC-411

TROUBLEDIAGNOSES
Cooling FanControl (Cant'd)
COMPONENT INSPECTION
Cooling fanrelays-1, -2and -3

Check continuity betweenterminals
@
and
CID,CID
and
(l).

SEC202B
Conditions
12V direct current supplybetween
terminals
G)
and
@

No current supply

If
NG, replace relay. Continuity

Yes
No
Cooling fanmotor-1
harness connector
Cooling fanmotor-2
harness connector
SEF044Q Cooling
fanmotors-1 and-2

1. Disconnect coolingfanmotor harness connectors.
2. Supply cooling fanmotor terminals withbattery voltage and
check operation.
Terminals
Speed
(EB)
(8)

Cooling fan Low

G) @

motor-1 High
@,e!) @,@

Cooling fan Low

e!) @

motor-2 High
@,e!) @,@
Cooling fanmotor should operate.

If NG, replace coolingfanmotor.

EC-412

TROUBLEDIAGNOSES
Air Conditioner CutControl
SYSTEM DESCRIPTION

The airconditioner isturned offunder thefollowing conditions:
RHO models .
• Engine coolant temperature ishigher than
grC
(20rF)
LHD models
• Engine coolant temperature ishigher than105°C (221°F)
For trouble diagnoses, referto"TROUBLE DIAGNOSES" inHA section.
Air
conditioner switch
Engine coolant temperature sensor
A/C

ONsignal
Engine coolant temperature
ECM

(Engine
control module) Air
condi-
tioner relay

•

EC-413

TROUBLEDIAGNOSES
Air Conditioner CutControl (Cont'd)
LHD models

EC-A/CCUT-01

Refer toEL-POWEA.

OFF

LG/R~
I

,
I

I
ON
A/C
LG/R
I

SWITCH

m
I

OFF

@

I

THERMO
CONTROL
AMP.

~
ON

L/Y

~ ~
G/B G/BG/Y

THERMISTOR
I I
m

._-~--_. rn
JUNCTION

BOX
NO.2

To compressor (JOINT
._ L/R. (Referto CONNECTORS)

I
HA-A/C.)~~

G/Y

00
~E~N~~gD
I?iJ
~~~TCH

VALVE OFF--~

IkjJ
(E64) ~

B (E65) B

I
r1
I

• .., BBB

1 ~
1
i....l

mm ~~

RIL
~

t

FUSE
BLOCK
(JIB)
~

(BOO)

R/L

IriDl
A/C

DUAL-
PRESSURE SWITCH

~

1~11I~211~1

LIB LG/R LG/R

II-~ --

LIB
L/Y

IT ~IA/C
n

RELAY

U
UID

4=JJ~
L L/R

~L

rn

I
ECM(ENGINECONTROLMODULE)

---------- @

n

LOW HIGH

... ~~_.

NORMAL

I!4Jl
G

~~1;1$1
G

m

COMP

~(E16)

T
L

JS4.ffi

(tiS)
B
~-----------.,

I I

:ITl~ ~~:

I I

L
~
IQl@

~ W
Refer
tolast page
(Foldout page).

CMID
(El0n

,

lf1@
(E106)

,

~
HEC095
EC-414

TROUBLEDIAGNOSES
Air Conditioner CutControl (Cont'd)
RHO models

EC-A/CCUT-02

•

A/C

SWITCH

@

~
LG/B

ON

OFF

I

I
I
ON

I
I
OFF

I

LG/R~
Refer
toEL-POWER.
THERMISTOR
---I

THERMO
LG RCONTROL
m AMP.~
~
~GY~

R/L
~

IACV-FICD
SOLENOID
VALVE

(E101)
(BID @!QD~

- L/R ~ L/R~ L/R-e=~Y,
B

'-B~

To compressor • LG/B

- L/R.
(~~~~/C
tf ~
I

. ffi
~~:CTOR-4 OFF--ON~~;CH

t
W ~

B B

+--,
n
I

B BB BB

1
t..lt..l

@

FUSE
BLOCK
(JIB)

@g)


R/L

Irfnl
A/C
I

ECM
(ENGINE
CONTROL
MODULE)

~---------@
UQ-lil
I
N.21
I
N.21

LIB LG/R LG/R

I
I
I

LIB L/Y

IT ]/,/c
n

RELAY

U~

~lbi=ll
L L/R

r
L..

m
L

OUAL-
LOW HIGH PRESSURE
... _e SWITCH
NORMAL
ffi

4=U
G

db (E101)

I~I(][)

G

m

COMP

r----------.,

J
I

1Ql ~
I
F.1
(B10n
B
(B102)
I
ITI:illIIITIIII
@~ ~

C!J.S)
BI~ B~ BI~ P123456 W

I I

L
.J

A~

T
L
L'Ql@

[[[g@]
W
Refer
tolast page
(Foldout page).

(BID
(E101)

,

~
,

HEC096
EC-415

TROUBLEDIAGNOSES
Fuel CutControl

IGNITION SWITCH
ON orSTART
EC-FCUT-01

10A

1251
FUSE
BLOCK
(JIB)

Refer
toEL-POWER.

(b):
LHOmode Is

:
RHDmodels
BR

~@)

~m»
BR

t
o

I

BR

m

FUEL CUT
SOLENOID VALVE
SR

liJ~

1!:iJl@

BR
INJECTION
PUMP

~
~~
~S ~~

m:zm
GY
~~

\IDZJ
GY

EC-416
Refer
tolast page
(Foldout page).

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