1995 NISSAN ALMERA N15 Service Manual

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Start Signal

EC-S/SIG-01

Refer toEL-POWER.
ECM
(ECCS

CONTROL
MODULE)

(IT)
For
Europe andIsrale
Except forEurope and
Israle
Detectable line
for DTC
Non-detectable line forDTC

_.

-:

@:
@:

FUSE
BLOCK
(JIB)
~

0:106)

7.5A

1261

ST
IGNITION
SWITCH

~

U
N•4
11
B/Y

I

B/Y

r::b@

I[QJI
CEID

B/Y

I

B/Y

~ ST

SW

OF

r--------------------,

I I

IFmfl ~ I

: rmm ~@~:

: W W :

L
~
Refer
tolast page
(Foldout page).

HEC038
EC-138

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Start Signal (Cont'd)
GA16DE forAustralia

EC-S/SIG-01

Refer toEL-POWER.

•

-:
Detectable line
for DTC
-: Non-detectable
line forDTC
ECM (ECCS
CONTROL
MODULE)

ern

FUSE
BLOCK
(JIB)


CE106)

7.5A

1261

ST
IGNITION
SWITCH

~
30A

OJ

IN.41
SlY

I

BIY

r.::b@
l/¥ll@)

SlY

I

SlY

~

STSW

~~

tmI
W
Refer
tolast page
(Foldout paglil).

101 102 103
107 108 109
113 114
115 104
105106
110
111
112
116
117
118

HEC070
EC-139

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Start Signal (Cont'd)
DIAGNOSTIC PROCEDURE
CHECK OVERALL FUNCTION.

00
1.
Turn ignition switch"ON".

I
II
2.
Perform "STARTSIGNAL
NEXT
START
CKT"
in"FUNCTION TEST"
MEF481B mode
withCONSULT.
OR

m
00
2.
Check "START SIGNAL" in
* MONITOR *
NO FAIL
0
"DATA
MONITOR" modewith
START SIGNAL CONSULT.
OFF

I

CLSDTH/PSW
ONIGN
"ON" OFF
AIR COND SIG OFF
IGN"START" ON
PIN POSI SW ON

II
•
START SIGNAL CKT.
CLOSE THROTTLE. SHIFT
TO POR NRANGE.
2. TOUCH STARTAND
START ENGINE
IMMEDIATELY.

~ __ RE_C_O_R_D_---,l

SEF111P

~I)~ID

ECM
B
CONNECTOR
II

34 20
INSPECTION
START

OR

1. Turn ignition switchto
"START".
2. Check voltage between ECM
terminal @or
@l
and
ground.

Voltage:
Ignition switch"START"
Battery voltage
Except above
Approximately OV

NG OK

INSPECTION END

II
@:

ForAustralia
34 :Except forAustralia

~Io

ECM
ET
CONNECTOR
II

34 20

@:
ForAustralia

@:
Except forAustralia SEF231R
SEF232R Check
if7.5A fuseisOK.
OK
CHECK INPUTSIGNAL CIRCUIT.
1. Turn ignition switch"OFF".
2. Disconnect ECMharness connector
and 7.5A fuse.
3. Check harness continuity between
ECM terminal @or
@l
and fuse
block.

Continuity shouldexist.

If OK, check harness f<;>rshort.
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.
INSPECTION END
EC-140
NG
NG
Replace
7.5Afuse.
Check thefollowing.
• Harness connectors

(ID,@

• Harness foropen or
short between ECM
and fuse block
If NG, repair harness or
connectors.

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Injector
EC-INJECT-01

Refer toEL-POWER.

G

rh

•

ECM (ECCSCONTROL
MODULE)

ill)

LHO
models
RHO models
For Europe andIsrael
Except forEurope and
Israle
Detectable line
for DTC
Non-detectable line forDTC

-: -:

(b):

@:

@:

@:

.-----'.-----.-----
I I I

SIR BIRBIR BIR

rn
2 ~2rn
fi1=i1
rn2
INJECTOR
INJECTORINJECTOR INJECTOR
NO.1 NO.2NO.3 NO.4

(EJ]) rn~
(F21)

4=B 4=B
4JJ
4=B

RIS Y/B
GIB
LIB

I I II

RIB Y/B
G/B
LIB

rmru In10iJ
11~31 11~21

INJ INJINJ INJ
#1 #2#3 #4

t

ST
IGNITION
SWITCH

~

'e-

ACC

4J
SIR

I
~$
SIR SIR

m
r=b
t=
(EiOt)

<:BID
I~I ~
<:BID

SIR SiR

1;>-1>
I
~.
SIR SIR
IG7'A\

~m rn~

ernl4=Jl
l!::i=Jl@

SIR SIR

U

OFF

~------------------~

, ,

'FITm ~
I

:rnrnID@~@@:

: W W :

L ~
1&1

(EJ]),rn,@,~

@B BBB
Refer
tolast page
(Foldout page;J.

<:BID ~

I

rn'
I
'fil
ern

3456
W
~I
,1f.I)@

87654 W

HEC039
EC-141

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Injector (Cont'd)
GA16DE forAustralia

EC-IN0ECT-01

ECM
(EGGS
CONTROL
MODULE)

(ED

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

IGNITION
SWITCH

'e-
tEi7A\

AGG ON~

~
BIR

1r$1~
BIR
<:BID

4J@
B/R@
I

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

BIR BIRBIR BIR

( ~ :1
INJECTOR
OCI
INJECTOR
m
INJECTOR
m
INJECTOR

No.1 NO.2No.3 NO.4

~ @ @
m

L4J
4J
I4=!J L4J

RIB Y/B
GIB
LIB

I II I

RIB
Y/BGIB
LIB

~ 11~7111~41 h1~1

INJ INJINJ INJ

#1 #2#3 #4

~~

rmrn
W
(![~lifilCIT>
~
~,m,@,m

3456 W~ BBBB
Refer
tolast page

(Foldout page).

101 102103
107 108109
113 114
115 104
105106
110 111

112

116 117 118

HEC071
EC-142

•

INSPECTION END
Check thefollowing.
• Harness connectors

@,@or@,

@

• Harness connectors

@,CillD

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

OK
NG
DIAGNOSTIC
PROCEDURE

INSPECTION START

CHECK OVERALL FUNCTION.

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

OR

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

Clicking noiseshould be
heard.
CHECK POWER SUPPLY.

1. Stop engine.
2. Disconnect injectorharness connec-

tor.

3. Turn ignition switch"ON".
4. Check voltage between terminal @
and ground withCONSULT ortester.

Voltage: Batteryvoltage
AEC872
SEF730L

/~~

Click

Ct.
'~.+

Fuel injector harness
connector

II

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
in
the
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.

SEF596K

• ACTIVE TEST.
D

••• POWER BALANCE •••

= ==
MONITOR
=
==

CMPS.RPM(REF) 737rpm
MAS AIR/FL SEN098V
IACV-AAC/V 41%

110Q]Q]~

DDDDc:J
MEF354F
~7~

~ \)drJ

At idle

--
/ I

AEC755EC-143

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS

Injector (Cont'd)

Replaceinjector.
Check
thefollowing.
• Harness foropen or
short between ECMand
injector
If NG, repair harness or
connectors.

NG
NG
OK
@

1

CHECK OUTPUT SIGNALCIRCUIT.

1. Turn ignition switch"OFF".
2. Disconnect ECMharness connector.
3. Check harness continuity between
injector harness connector terminal
QLand ECMterminals
GID,
@,

@,
CTID
or
00, CIID,
Gill,
@).

Continuity shouldexist.

If
OK, check harness forshort.
CHECK COMPONENT
(Injector).
Refer to"COMPONENT INSPECTION"
below.
(@:No.1
cylinder@:No.3cylinder

@:
No.2cylinder
@:
No.4cylinder

Except forAustralia
~io

II
ECM
'g
CONNECTOR
II

101.110.
103.112

.
,

r.ii3I

ForAustralia

~ ~15

1='
=E=CM=Ef CONNECTOR
II

102 •107. 104.109

.
,

OK

@ :
NO.1 cylinder
@:
No.3cylinder
@:No.2cylinder @:No.4cylinder

SEF148R
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.
INSPECTION END

AEC559 COMPONENT
INSPECTION

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

EC-144

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Fuel Pump
SYSTEM DESCRIPTION

Enginespeed
Camshaft positionsensor
Startsignal
Ignition switch
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.
ECM

(ECCS
control module)
Condition
Ignition switchisturned toON.
Engine running andcranking
When engine isstopped
Except asshown above Fuel
pump relay
Fuel pump operation
Operates for
5 seconds
Operates
Stops in1second
Stops
•

COMPONENT DESCRIPTION

A turbine typedesign fuelpump isused inthe fuel tank.

AEC801
EC-145