1995 NISSAN ALMERA N15 Service Manual

Checkthefollowing.
• Harness connectors

QD,@

• 10A fuse
• Harness openorshort
between EGRvalve
&

EVAP canister purge
control solenoid valve
and fuse
If NG, repair harness or
connectors.

NG

CHECK POWER SUPPLY.

1. Stop engine.
2. Disconnect EGRvalve
&
EVAP canis-
ter purge control solenoid valvehar-
ness connector.
3. Turn ignition switch"ON".
4. Check voltage between terminal
@

and ground.

Voltage: Batteryvoltage
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Exhaust GasRecirculation (EGR)Valveand

_~ ~EVAPcanis:r PurgeControl (Cont'd)

\

~GR valve
&
EVAP
------ canistercontrolsolenoid
valve harness connector

,----,
-----
.
\
\
\

I
I
MEC7638
CHECKOUTPUT SIGNALCIRCUIT.

1. Turn ignition switch"OFF".
2. Disconnect ECMharness connector.
3. Check harness continuity between
ECM terminal
(ill)
andterminal
CD.

Continuity shouldexist.

If OK, check harness forshort.
NG

Repair harness orcon-
nectors.

MEC7648 OK

~i5

1=1
=E=CM=-g CONNECTOR
II

105

MEC7658
• EGR CONT S/VCIRCUIT.
DOES THESOLENOID
VALVE MAKE
AN OPERATING SOUND
EVERY 3SECONDS?
NEXT
II
NO
II
YES
I

MEF5698 CHECK
COMPONENT

(EGR valve
&
EVAP canister purgecon-
trol solenoid valve).

(ij\
1.Reconnect ECMharness con-
~ nectorandEGR valve
&
EVAP
canister purgecontrol sole-
noid valve harness connector.
2. Turn ignition switch"ON".
3. Perform "EGRCSOLIV
CIRCUIT" in"FUNCTION
TEST" modewithCONSULT.

OR

(F./)
3.Turn EGRvalve
&
EVAP can-
~ isterpurge control solenoid
valve "ON"and"OFF" in
"ACTIVE TEST"modewith
CONSULT andcheck operat-
ing sound.

OR

~ Referto"COMPONENT
~ INSPECTION" onnext page.

OK

Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
NG

Replace EGRvalve
&

EVAP canister purgecon-
trol solenoid valve.
• ACTIVE TEST.
0

EGRC SOL/V
0N

== =
MONITOR
== =

CMPS.RPM (REF)Orpm Trouble
isnot fixed .
Check ECMpinterminals fordamage
and check theconnection ofECM har-
ness connector. ReconnectECMhar-
ness connector andretest.
INSPECTION END

ON
I_I
OFFl
clEF353F
EC-322

•

Air
passage Airpassage
Conditions continuitycontinuity
between
@
and
@
between
@
and
@

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

No supply No
Yes

.

NEF071

o

TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS[]:[]
Exhaust GasRecirculation (EGR)Valveand
EVAP Canister PurgeControl (Cont'd)
COMPONENT INSPECTION
EGR valve
&
EVAP canister purgecontrol solenoid valve

1. Disconnect EGRvalve
&
EVAP canister purgecontrol sole-
noid valve harness connector.
2. Check solenoid valve,following thetable asshown below:
If NG, replace EGRvalve
&
EVAP canister purgecontrol
solenoid valve.

EGR valve

Apply vacuum toEGR vacuum portwith ahand vacuum pump.

EGR valve spring should lift.

If NG, replace EGRvalve.

SEF820FB EGRC-BPT valve

Plug oneoftwo ports ofEGRC-BPT valve.
Apply apressure above0.490kPa(4.90 mbar, 50mmH
2
0,
1.97
inH
2
0)
tocheck forleakage.
If
a leak isnoted, replace valve.

t
SEF807K
EC-323

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
[]B]

Injector
EC-INJECT-01

Refer toEL-POWER. -:
Detectable line
for DTC
-: Non-detectable
line forDTC

G

m

ECM
(ECCSCONTROL
MODULE)

(IT)

ST
IGNITION
SWITCH


'e-

ACC

~
BIR

1~I(E101)

BIR (][)

i4J@
B/R@
I

e,----e----e----I
I II

BIR BIRBIRBIR

( ~ :1 ~I (
€
:1 ~I
INJECTOR
INJECTOR
INJECTORINJECTOR
NO.1 NO.2NO.3 NO.4

(ffi)
rn
@
ffi

I4=JJ I4=JJI4=JJI4=JJ

RIB
Y/BGIB
LIB

I III

RIB
Y/BGIB
LIB

~ 11~ol11~3111~21

INJ INJINJINJ

#1 #2#3#4

OFF

~~

tm:lID
W
f!l'

I
IfiJ
@ ~
(ffi)
I
ffi) •~
I
ffi

3456 W
@
BB BB
Refer
tolast page

(Foldout page).

em
L

HEC011
EC-324

•

INSPECTION END
Check thefollowing.
• Harness connectors

@,@

• Harness connectors

@,

• Harness foropen or
short between injector
and ignition switch
If NG, repair harness or
connectors.

OK
NG
OK

@

INSPECTION
START

DIAGNOSTIC
PROCEDURE
CHECK OVERALL FUNCTION.

(ij\
1.Start engine.
~ 2.Perform "POWER BALANCE"
in "ACTIVE TEST"modewith
CONSULT.
3. Make surethateach circuit
produces amomentary engine
speed drop.

OR

~ 1.Start engine.
~ 2.Listen toeach injector operat-
ing sound.

Clicking noiseshould be
heard.
CHECK POWER SUPPLY.
SEF730L
1.Stop engine.
2. Disconnect injectorharness connec-
tor.
3. Turn ignition switch"ON".
4. Check voltage between injectorhar-
ness connector terminal
@
and
ground withCONSULT ortester.

Voltage: Batteryvoltage
SEF596K
I~~
Click

Ct.
I~-+

TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Injector
{Cont'd)

COMPONENT DESCRIPTION

The fuel injector isasmall, precise solenoid valve.Whenthe
ECM supplies aground tothe injector circuit,thecoil inthe
injector isenergized. Theenergized coilpulls theneedle valve
back andallows fueltoflow through theinjector intotheintake
manifold. Theamount offuel injected depends upontheinjec-
tion pulse duration. Pulseduration isthe length oftime the
injector remains open.TheECM controls theinjection pulse
duration basedonengine fuelneeds.

• ACTIVE TEST.
0

••• POWER BALANCE •••

= ==
MONITOR
=
=
=

CMPS.RPM(REF) 737rpm
MAS AIR/FL SENO.98V
IACV-AACjV 41%

110Q]~~

DDDDL:::J
MEF354F

--
/1

MEF960AAEC755 EC-325

Repairharness orcon-
nectors.

CHECK
OUTPUT SIGNALCIRCUIT.

1. Turn ignition switch"OFF".
2. Disconnect ECMharness connector.
3. Check harness continuity between
injector harness connector terminal

G)
and ECM terminals
@.
Gill,

GID.
Gill.

Continuity shouldexist.
If OK, check harness forshort.

~i5

illb

TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Injector (Cont'd)
@

1

~i5

ECM
-g
CONNECTOR
II

\101'110:103'112,

@:
NO.1
cylinder
@:
No.3 cylinder

<::DQ):
No.2cylinder
@):
No.4cylinder
SEF485Q

II

OK

CHECK COMPONENT
(Injector).
Refer to"COMPONENT INSPECTION"
below.
NG

Replace injector.

OK

Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
~ Trouble isnot fixed.
Check ECMpinterminals fordamage
and check theconnection ofECM har-
ness connector. ReconnectECMhar-
ness connector andretest.
INSPECTION END

COMPONENT INSPECTION

Injector
1. Disconnect injectorharness connector.
2. Check resistance betweenterminals asshown inthe figure.
Resistance: 10-140 [at25
0
(77°F)]
If NG, replace injector.

AEC559
EC-326

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Fuel Pump
SYSTEM DESCRIPTION

I
Camshaft positionsensor
I

Engine speed

~

ECM
(ECCS Fuel
control pump
!,gnition switch Start
signal
relay

I
module)

The ECM activates thefuel pump forseveral sec-
onds aftertheignition switchisturned onto
improve enginestartability. Ifthe ECM receives
a 180
0
signal fromthecamshaft positionsensor,
it knows thattheengine isrotating, andcauses
the pump toperform. Ifthe 180
0
signal isnot
received whentheignition switchison, the
engine stalls.TheECM stops pump operation
and prevents batterydischarging, thereby
improving safety.TheECM does notdirectly
drive thefuel pump. Itcontrols theON/OFF fuel
pump relay,which inturn controls thefuel pump.
Condition
Ignition switchisturned to"ON"
Engine running andcranking
When engine isstopped
Except asshown above Fuel
pump operation •
Operates for
5 seconds
Operates
Stops in1second
Stops

COMPONENT DESCRIPTION

The fuel pump withafuel damper isan in-tank type(thepump
and damper arelocated inthe fuel tank).

AECB01
EC-327

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
[]K]

Fuel Pump (Cont'd)

EC-F/PUMP-01

IGNITION SWITCH
ON 01"' START

15A

IJI)
FUSE
BLOCK
(JIB)

(M15) ReteI"'
toEL-POWER. -:
Detectable line
tal"'
DTC

-: Non-detectable
line tal"'DTC
FUEL
TANK

GAUGE

UNIT

(B17)
ECM (ECCS
CONTROL
MODULE)

(ffi

B/P

r=b~

I~I@

B/P

I

B/P

~ FPR

U
N•61

I
N.61
B/L B/W

II!
]I(UEL
n

PUMP

U
RELAY

Ibi=JlIbiJCHD
B/P
B/Y

1
B/Y~~B/Y
----_1

(@ (]I)

B/Y

m

~@
B

~1
FUEL
M PUMP
~
~ B

m@

~ B

I

,-,

B B

...L ...L

(811)
(832)

A
T
L
FillJ@
m
w
~@

0.J.g)
~@

I..!.@J
Refer
tolast page
(Foldout page).

(ffi
L

HEC012
EC-328

•

INSPECTION
START

CHECK OVERALL FUNCTION.
~
INSPECTION
END
1. Turn ignition switch"ON".
2. Pinch fuelfeed hose withfingers.

Fuel pressure pulsation shouldbefelt
on the fuel feed hose for5seconds
aller ignition switchisturned "ON".

NG

m
.

CHECK POWER SUPPLY.
NG
Check thefollowing.
1. Turn ignition switch"OFF".
~

•15A fuse
2. Disconnect fuelpump relay.
•Harness foropen or
3. Turn ignition switch"ON".
shortbetween fuseand
4. Check voltage between terminals
CD,

fuelpump relay

@
and ground withCONSULTor
IfNG, repair harness or
tester. connectors.

Voltage: Batteryvoltage

OK

[!l
CHECK POWER ANDGROUND CIRCUIT.
NG
Check thefollowing.
1. Turn ignition switch"OFF".
~

•Harness connectors
2. Disconnect fuelpump harness con-

@,Cill

nector. •Harness foropen or
3 Check harness continuity between
shortbetween fuel
terminal @and body ground, termi-
pumpandbody ground
nal
CD
and fuel pump relayconnector
•Harness foropen or
terminal
@.

shortbetween fuel

Continuity shouldexist.

pumpandfuel pump
If OK, check harness forshort.
relay
OK
If

NG, repair harness or
connectors.

I!]
CHECK OUTPUT SIGNALCIRCUIT.
NG
Check thefollowing.
1. Disconnect ECMharness connector.
~

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

ECM terminal
Gill
andfuel pump
•Harness foropen or
relay connector terminal@.
shortbetween ECMand

Continuity shouldexist.

fuelpump relay
If OK, check harness forshort.

If
NG, repair harness or
~OK connectors.

o

SEF479P
MEC267BA
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Fuel Pump (Conl'd)
DIAGNOSTIC PROCEDURE

Under therear seat

"---
EC-329