engine 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

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

•

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

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
@K]

Power Steering OilPressure Switch(Cont'd)
@:
ForAustralia

@:
Except forAustralia SEF176R
Repair
harness orcon-
nectors.
CHECK INPUTSIGNAL CIRCUIT. NG
Check thefollowing .
1. Disconnect ECMharness connector.
......---..

•Harness connectors
2. Check harness continuity between
aD,

(MID

ECM terminal
@
or
@
and terminal •
Harness connectors

G).
@,@or@,
Continuity shouldexist.
If
OK, check harness forshort. •
Harness foropen or
OK short
between ECMand
power steering oilpres-
sure switch
If NG, repair harness or
connectors.
CHECK COMPONENT NG
Replace powersteering
(Power steering oilpressure switch).
--...

oilpressure switch.
Refer to"COMPONENT INSPECTION"
below.
OK
Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage or
the connection ofECM harness connec-
tor. Reconnect ECMharness connector
and retest.
@

1

CHECK GROUND CIRCUIT.
1. Turn ignition switch"OFF".
2. Disconnect powersteering oilpres-
sure switch harness connector.
3. Check harness continuity between
terminal
@
and engine ground.
Continuity shouldexist.

AEC760
IfOK, check harness forshort.

~i5
[i

c:ITb

~i5

ECM
Ef
CONNECTOR
II

43 25

II

INSPECTIONEND

Power steering oilpressure switch

1. Disconnect powersteering oilpressure switchharness con-
nector thenstart engine.
2. Check continuity betweenterminals
and
@.

[At

IV
ID

~ COMPONENT
INSPECTION

Conditions
Steering wheelisbeing turned
Steering wheelisnot being turned Continuity

Yes
No
AEC762
IfNG, replace powersteering oilpressure switch.

EC-172

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
EVAP Canister PurgeControl Solenoid Valve
GA16DE MITmodels exceptforEurope, Israeland
Australia
SYSTEM DESCRIPTION

Camshaft positionsensor
Engine coolant temperature sensor
Mass airflow sensor
Throttle positionsensor
Ignition switch
Vehicle speedsensor Engine
speed
Engine coolant temperature
Amount ofintake air
Throttle position
Start signal
Vehicle speed ECM
(ECCS
control
module) EVAP
canister
purge control
solenoid valve

•

This system cutsandcontrols theport vacuum
applied tothe EVAP canister purgecontrol sole-
noid valve tosuit engine operating conditions.
This cut-and-control operationisaccomplished
through theECM. When theECM detects anyof
the following conditions, currentflowsthrough
the solenoid valveinthe EVAP canister purge
control solenoid valvecontrol vacuum line. This
causes theport vacuum tobe discharged
into theatmosphere sothat theEVAP canister
purge lineremains closed.
• Engine starting
• Closed throttle position
• Low andhigh engine coolant temperature
• During deceleration
• Engine stopped
• Vehicle speed:below10km/h (6MPH)
• Mass airflow sensor malfunction

W>
Vacuum
signal
SEF240PG COMPONENT
DESCRIPTION

The EVAP canister purgecontrol solenoid valveresponds to
signals fromtheECM. When theECM sends anON (ground)
signal, thecoil inthe solenoid valveisenergized. Aplunger will
then move tocut the vacuum signal(fromtheintake manifc,ld
to the EVAP canister purgecontrol solenoid valve).
When theECM sends anOFF signal, thevacuum signalpasses
through thesolenoid valve.Thesignal thenreaches theEVAP
canister purgecontrol solenoid valve.

EC-179

•

INSPECTION
START

m
CHECK VACUUM SOURCETOEVAP OK
CHECK COMPONENT
CANISTER.
L---.

(EVAPcanister).
1. Jack updrive wheels. (See
page EC-29.)
2. Start engine andwarm itup suffi- If
NG, replace EVAPcan-
ciently. ister.
3. Perform diagnostic testmode II(Self-
diagnostic results).Makesurethat
9iagnostic troublecodeNo.55isdis-
played.
4. Disconnect vacuumhosetoEVAP
canister.
5. Set shift lever to1st position.
6. Make surethatvacuum existsunder
the following conditions.

At Idle:
Vacuum shouldnotexist.
Racing enginefromIdleto3,000 rpm:
Vacuum shouldexist.

NG

Ii)
[!J

CHECK CONTROL FUNCTION. OK
Check vacuum hosefor
1. Check voltage between ECMterminal
--..

clogging, cracksor

@
andground withCONSULTor improperconnection.
tester underthefollowing conditions.

Voltage: At idle
Approximately OV
Engine speedisabout 2,000rpm
Battery voltage

NG

I!l
CHECK POWER SUPPLY. NG
Check thefollowing.
1. Stop engine.
I-----.

•Harness connectors
2. Disconnect EVAPcanister purgecon-
QD,@

trol solenoid valveharness connector. •10A fuse
3. Turn ignition switch"ON". •
Harness foropen or
4. Check voltage between terminal
@
short
between EVAP
and ground withCONSULTor tester. canister
purgecontrol

Voltage: Batteryvoltage
solenoid
valveandfuse

r
K If
NG, repair harness or
connectors.

SEF816F
SEF488Q
MEC325B
MEC296BB
Clogging TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[ill

EVAP Canister PurgeControl Solenoid Valve
(Cont'd)
DIAGNOSTIC PROCEDURE
~i5
ECM
B
CONNECTOR
II
'f
~VV1

~ Crack

~i5
~

=:5---

~ Improperconnection

@
EC-181

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
EGR Valve andEVAP Canister PurgeControl
Solenoid Valve
For Europe, IsraelandAustralia, andGA15DE MIT
models
SYSTEM DESCRIPTION

Camshaft positionsensor
Engine coolant temperature sensor
Mass airflow sensor
Throttle position sensor
Ignition switch
Vehicle speedsensor Engine
speed
Engine coolant temperature
Amount ofintake air
Throttle position
Start signal
Vehicle speed ECM
(ECCS
control module) EGR
valve
&

EVAP canister
purge control
solenoid valve

•

This system cutsandcontrols theport vacuum
applied tothe EGR valve andEVAP canister
purge control solenoid valvetosuit engine oper-
ating conditions.
This cut-and-control operationisaccomplished
through theECM. When theECM detects anyof
the following conditions, currentflowsthrough
the solenoid valveinthe EGR valve andEVAP
canister purgecontrol solenoid valvecontrol vac-
uum line. This
causes theport vacuum tobe discharged
into theatmosphere sothat theEGR valve and
EVAP canister purgelineremains closed.
• Engine starting
• Closed throttle position
• Low andhigh engine coolant temperature
• During deceleration
• Engine stopped
• Vehicle speed:below10km/h (6MPH)
• Mass airflow sensor malfunction

SEF783K

l#
Intake
manifold
vacuum signal
SEF240PF COMPONENT
DESCRIPTION
Exhaust gasrecirculation (EGR)valve

The EGR valve controls theamount ofexhaust gasrouted tothe
intake manifold. Vacuumisapplied tothe EGR valve in
response tothrottle valveopening. Thevacuum controls the
movement ofataper valve connected tothe vacuum diaphragm
in the EGR valve.

EGR valve andEVAP canister purgecontrol solenoid
valve

The EGR valve andEVAP canister purgecontrol solenoid valve
responds tosignals fromtheECM. When theECM sends anON
(ground) signal,thecoil inthe solenoid valveisenergized. A
plunger willthen move tocut the vacuum signal(fromthethrot-
tle body tothe EGR valve andEVAP canister purgevalve).
When theECM sends anOFF signal, thevacuum signalpasses
through thesolenoid valve.Thesignal thenreaches theEGR
valve andEVAP canister.

EC-183

INSPECTIONSTART

m
CHECK OVERALL FUNCTION.
~INSPECTION
END
1) Jack updrive wheels.
2) Start engine andwarm itup suffi-
ciently.
3) Perform diagnostic testmode II(Self-
diagnostic results).
Make surethatdiagnostic trouble
code No.55isdisplayed.
4) Set theshift lever to1st position.
5) Make surethatEGR valve spring
moves upand down (Useyourfin-
ger) under thefollowing conditions.

At idle:
SprIng doesnotmove.
RacIng engIne fromidleto3,000
rpm:
Spring moves upand down.

NG

l!1
CHECK VACUUM SOURCES TOEGR OK
CHECK COMPONENTS
VALVE ANDEVAP CANISTER.
-----...

(EGRvalve, EGRC-BPT
1) Disconnect vacuumhosestoEGR valveandactivated EVAP
valve andEVAP canister. canister).
2) Make surethatvacuum existsunder Refer
to"COMPONENT
the following conditions. INSPECTION".(Seepage

At idle:
EC-188.)

Vacuum shouldnotexist.

lNG

Racing engine fromidleto3,000
rpm: Vacuum shouldexist.
Replace
malfunctioning
component(s).
NG
[!J
I!l

CHECK CONTROL FUNCTION. OK
CHECK VACUUM HOSE.
1) Check voltage between ECMterminal
----..

1)Check vacuum hose

@
or
GID
andground underthe forclogging, cracksor
following conditions. improper
connection.

Voltage: At Idle
Approximately OV
Engine speedis2,500 rpm
Battery voltage

~NG
SEF179R

~=.
Crack
Clogging MEF51BE
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[]K]

EGR Valve andEVAP Canister PurgeControl
Solenoid Valve(Cont'd)
DIAGNOSTIC PROCEDURE

~I)
~ID

ECM
-gcoNNEcTORII ~

103 105
~.1

@ :
For Australia

@ :
Except forAustralia

II

Cf~H

~

~ Improperconnection

SEFB16F
EC-186