NISSAN ALMERA N15 1995 Service Manual

Checkcooling fanlow
speed control circuit.
(Go to

I
PROCEDURE A
I.)

Check cooling fanhigh
speed control circuit.
(Go to

I
PROCEDURE B
I.)

NG
NG
OK

INSPECTION
START
CHECK COOLING FANLOW SPEED
OPERATION.

I
With airconditioner
I

1. Start engine.
2. Set temperature leveratfull cold
position.
3. Turn airconditioner switch"ON".
4. Turn blower fanswitch "ON".
5. Run engine atidle forafew minutes
with airconditioner operating.
6. Make surethatcooling fanoperates
at low speed.

I
Without airconditioner
I

1. Start engine.
2. Keep engine speedatabout 2,000
rpm until engine iswarmed upsuffi-
ciently.
3. Make surethatcooling fanbegins to
operate atlow speed during warm-

up.
MEC340B
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cant'd)
DIAGNOSTIC PROCEDURE

Cooling fan

Without
airconditioner

Coolingfan
Engine coolant

~ ~ ~a~~:;:t:a::;'~~'

~~ eN
lDoo

Q
CHECKCOOLING FANHIGH SPEED

150n
Resistor
~ ~ OPERATION.
~ ~ 1.Turn airconditioner switch"OFF".

SEF492Q
2.Turn blower fanswitch "OFF".
(Steps 1)and 2)are only performed
for models withairconditioner.)
3. Stop engine.
4. Disconnect enginecoolant tempera-
ture sensor harness connector.

5.
Connect
1500
resistor toengine cool-
ant temperature sensor.harness con-
nector.
6. Restart engineandmake surethat
cooling fanoperates athigh speed.

m

With airconditioner

Coolingfan

OK

INSPECTION END

EC-162

•

Check
thefollowing.
• 10A fuse
• 30A fusible link
• Harness foropen or
short between cooling
fan relay-1 andfuse
• Harness foropen or
short between cooling
fan relay-1 andbattery
If NG, repair harness or
connectors.

OK
PROCEDURE
A

INSPECTION START
CHECK POWER SUPPLY. NG
1. Stop engine.
2. Disconnect coolingfanrelay-1.
3. Turn ignition switch"ON".
4. Check voltage between terminals
G),

@
and ground.

Voltage: Batteryvoltage
SEF193R
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cont'd)
DIAGNOSTIC PROCEDURE
MEC342B
CHECKGROUND CIRCUIT.
1. Turn ignition switch"OFF".
2. Disconnect coolingfanmotor-1 har-
ness connector andcooling fan
motor-2 harness connector.

I!l
3.Check harness continuity
between terminal
CD
and termi-
nal
@.
Continuity shouldexist.

If OK, check harness forshort.

Ii
4.Check harness continuity
between terminal
@
and body
ground orterminal
@
and body
ground.

Continuity shouldexist.

If OK, check harness forshort.

OK

@
NG

Repair harness orcon-
nectors.

EC-163

Ii
1

CHECK OUTPUT SIGNALCIRCUIT. NG
Check thefollowing.
1. Disconnect ECMharness connector. ~
•Harness connectors
2. Check harness continuity between
aD,@

ECM terminal @or@ and terminal •
Harness connectors
@.
@,@D

Continuity shouldexist. •
Harness foropen or
OK short
between cooling
Ian relay-1 andECM
If NG, repair harness or
connectors.
CHECK COMPONENT NG
Replace coolingfan
(Cooling fanrelay-1).
---+

relay.
Refer to"COMPONENT INSPECTION".
(See page EC-167.)
OK

[!1

CHECK COMPONENTS NG
Replace coolingfan
(Cooling fanmotors-1 and-2).
---+

motors.

00
1.
Reconnect coolingfanrelay-1,
cooling fanmotor harness
connectors andECM harness
connector.
2. Turn ignition switch"ON".
3. Perform "COOLING FAN
CIRCUIT" in"FUNCTION
TEST" modewithCONSULT.
OR

00
3.
Perform "COOLING FAN"in
"ACTIVE TEST"modewith
CONSULT. OR
@ Refer
to"COMPONENT
INSPECTION". (Seepage
EC-167.)
OK
Disconnect andreconnect harnesscon-
nectors inthe circuit. Then.retest.
Trouble isnot fixed.
Check ECMpinterminals fordamage
or the connection 01ECM harness con-
nector. Reconnect ECMharness con-
nector andretest.
INSPECTION END
SEF175R
SEF195R
SEF234R
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cont'd)

@

COOLING FAN
•
COOLING FANCIRCUIT.
DOES

~i5

ECM E
CONNEc@1

9 14

II

*
1: 2-step control models

*
2:3-step control models
*
1:2-step control models
* 2:3-step control models

@:
ForAustralia

(2):
Except lorAustralia

Ii

ROTATEANDSTOP
EVERY 3SECONDS
?

NEXT
II
NO
11
YES
I

MEF311F
EC-164

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cont'd)

•

PROCEDURE
B

INSPECTION START

1:1
CHECK POWER SUPPLY. NG
Check thefollowing.

----..

1. Stop engine. •Harness foropen or
2. Disconnect coolingfanrelay-2. short
between cooling
3. Turn ignition switch"ON". fan
relay-2 andfuse
4. Check voltage between terminals
G),
•
Harness foropen or

@
and ground. short
between cooling

Voltage: Batteryvoltage
fan
relay-2 andfusible

.
OK link

If
NG, repair harness or
connectors.
CHECK GROUND CIRCUIT. NG
Repair harness orcon-
1. Turn ignition switch"OFF".
----..

nectors.
2. Disconnect coolingfanmotor-1 har-
ness connector andcooling fan
motor-2 harness connector.

o
3.Check harness continuity
between terminal
@
and termi-
nal
@.

Continuity shouldexist.

If OK, check harness forshort.

II
4.Check harness continuity
between terminal
@
and termi-
nal
@,
terminal
(!)
and body
ground.

Continuity shouldexist.

If OK, check harness forshort.
OK

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

•Harness connectors
2. Check harness continuity between
@,@

ECM terminal
@
or
@l
and terminal •
Harness connectors

@.
@,@D

Continuity shouldexist.
•
Harness foropen or
If OK, check harness forshort. short
between ECM
OK and
cooling fanrelay-2

If
NG, repair harness or
connectors.

MEC346B

o

•
ACTIVE TEST.
COOLING FAN
OFF

COOLAN TEMP/S 88°C

=
= =
MONITOR
== =

1:1
~i5
~3
7 5

2 1

EC-165

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cont'd)
@

o

~i5
~-

m=m
CHECK
COMPONENT
(Cooling fanrelay-2).
Refer to"COMPONENT INSPECTION"
on next page.
NG

Replace coolingfan
relay.

OK

II
Replacecoolingfan
motors.

NG
OK
SEF226R
SEF227R

~i5
00

Jm1
3
7 5

2 1
CHECK
COMPONENTS

~ IDlsco~
(Coolingfanmotors-1 and-2).

I...s1
0~
1.Rec~nnect coolingfanrelay-2,

~ \J!}
coolingfanmotor harness

QW
connectors,enginecoolant
temperature sensorharness
connector andECM harness
connector.
2. Turn ignition switch"ON".
3. Perform "COOLING FAN
CIRCUIT" in"FUNCTION
TEST" modewithCONSULT.

OR

3. Perform "COOLING FAN"in
"ACTIVE TEST"modewith
CONSULT.
OR

~ Referto"COMPONENT
~ INSPECTION" onnext page.

~i5
:~

rn=m

~i5

ECM
El'CONNECTORII

13 10

II

@:
ForAustralia

@:
Except forAustralia SEF196R
Disconnect
andreconnect harnesscon-
nectors inthe circuit. Thenretest.

II
•COOLING FANCIRCUIT.
DOES
COOLING FAN
ROTATE ANDSTOP
Trouble
isnot fixed .
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.

EVERY 3SECONDS
7

NEXT
II

NO
II
YES
I

MEF311F
INSPECTION
END

II •
ACTIVE TEST.
COOLING FAN

OFF

=
= =
MONITOR
COOLAN TEMPjS
---
---

ggoC
CJ5_N_I~ MEF312F
EC-166

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cant'd)
COMPONENT INSPECTION
Cooling fanrelay-2

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

•

No
No
Yes
Yes

Continuity
Continuity
Conditions

If
NG, replace relay.
Conditions
12V direct current supplybetween
terminals
G)
and
@

No current supply
12V direct current supply
between terminals
G)
and
@

No current supply
If
NG, replace relay.

SEF511P

=

Coolingfanrelay-1

Check continuity betweenterminals @and
CID.

SEC2028 Cooling fanmotors-1 and-2

MIl
models:

1. Disconnect coolingfanmotor harness connectors.
2. Supply cooling fanmotor terminals withbattery voltage and
check operation.

SEF499QA
(EB)

Cooling fan
motor Terminals

(8)

Cooling fanmotor should operate.

If NG, replace coolingfanmotor.

EC-167

Terminals

Speed
(EB)
(8)

Cooling fan Low

G)
@

motor-1 High
@
@

Cooling fan Low

G)

@

motor-2 High
@
@

SEF500QA
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
@]

Cooling FanControl (Cant'd)

~ IDISCD~
AfTmodels forAustralia andLHD AfTmodels forEurope with-

~ c'J
outdaytime lightsystem

1. Disconnect coolingfanmotor harness connectors.
2. Supply cooling fanmotor terminals withbattery voltage and
check operation.

Cooling fanmotor should operate.

If NG, replace coolingfanmotor.

EC-168

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Power Steering OilPressure Switch

EC-PST/SW-01

•

LHD
models
RHO models
LHD models withABSor
dual airbag orrear door
power window
LHO models except
@

Detectable line
for DTC
Non-detectable line forDTC

(0:

@:
@:

-:
-:

:

ECM
(ECCSCONTROL
MODULE)

em

PWST

1~31

PU/W

I

PU/W

14J1 ~

PU/W

I

+~--------~'-@--------I

PU/W PU/W

1$11
CHID
1c}J1~

(El0n (8113)

PU/W PU/W

rh rh

,.
B B

~ ~

m
(E51)
POWER
STEERING
OIL PRESSURE
SWITCH

~: POWER
STEERING
OIL PRESSURE
SWITCH

(8102):
@

ON

OFF .....--
~B
J

ON

OFF .....--
~B

+
O~

I

,.

B B

~ ~

@~

POWER
STEERING
OIL PRESSURE
SWITCH

@:@

ON

~ B
~
W
,..Q...

@ ~
(8102)
UJ.g)
GY,GY ,GY
ffiIl'

I
lfij
(8113)

45678 W
Refer
tolast page
(Foldout page).

CHID
(El0n

,

HEC046
EC-169

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
@J

Power Steering OilPressure Switch(Cont'd)

GA16DE forAustralia

EC-PST/SW-01

PWST
1
2•5
1

PU/W

I

PU/W

Iml@

=r~

PU/W

I

PU/W

1$11

~

PU/W

I
ECM
(ECCS
CONTROL
MODULE)

(IT)
-:
Detectable line
for
DTC

-: Non-detectable
line for
DTC
POWER STEERING
OIL PRESSURE
SWITCH

@

ON

OFF'---

~B

I

,-,

B B

..L. ..L.

do
~1)

~@

W,g)
GY
Refer
tolast page
(Foldout page).

m

,

101 102103
107 108109
113 114
115 104
105
106
110 111112
116
117
118

EC.170 HEC078

•

INSPECTION END

OK

The
power steering oilpressure switchisattached tothe power
steering high-pressure tubeanddetects apower steering load.
When apower steering loadisdetected,
it
signals theECM. The
ECM adjusts theIACV-AAC valvetoincrease theidle speed and
adjust forthe increased load.

INSPECTION START

OR

1. Start engine.
2. Check voltage between ECM
terminal
@
or
@
and ground.

Voltage: When steering wheelis
turned quickly.
Approximately OV
Except above
Approximately 5V
NG
DIAGNOSTIC
PROCEDURE
CHECK OVERALL FUNCTION.

fiii\
1.Turn ignition switch"ON".
~ 2.Perform "PW/STSIGNAL
CIRCUIT" in"FUNCTION
TEST" modewithCONSULT.

OR

(F.i\
1.Start engine.
~ 2.Check "PW/ST SIGNAL" in
"DATA MONITOR" modewith
CONSULT.

Steering isin neutral
position: OFF
Steering isturned:

ON

SEF591I
SEF235R
MEF023E

Power
steering oil___
pressure switch

-
~

to

TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
@[]

Power Steering OilPressure Switch(Cont'd)
COMPONENT DESCRIPTION

RECORD

NEXT

II
START

•
PW/ST SIGNAL CIRCUIT.
HOLD STEERING WHEEL
IN AFULL

LOCKED
POSITION
THEN
TOUCH START
* MONITOR *NO FAIL
0

PW/ST SIGNAL OFF

@):
ForAustralia

@:
Except forAustralia

~i)~

II
ECM
Ef
CONNECTOR
II

43 25

EC-171