engine NISSAN ALMERA N15 1995 Service Manual

TROUBLEDIAGNOSIS -General Descrip_tio_n
1s_R_1

Symptom MatrixChart(Cont'd)

SYMPTOM

z

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SYSTEM
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Reference

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a

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- Engine mechanical
&
other
I-

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x x

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en
(l)

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w w
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00 0
(l)

1A 1B
1C 1F1H
1R 1S
1M 1J1L1K

1T

1V
1N
1P1X 1Y
Fuel Fueltank

00 0

Fuel piping

00 0000 000
0

Vapor lock

00

Valve deposit

000 000 00 0

Poor fuel(Heavy weightgasoline. Low

0000 00 00
0
-

octane)
Air Airduct

00 00 0

Air cleaner

0
0
00 0

Air leakage fromairduct

00 00 00 0
0 0
0

(Mass airflow sensor -throttle body)
Throttle body.Throttle wire

•
•
•

•
• •
•
FE
section
Air leakage fromintake
manifoldl

00 0

•
0
0 0
00 0
-

Coliector/Gasket
Cranking Battery

0
0
00 0
0 0
0

0

Alternator circuit

00
00
0
0 0
00
EL
section
Starter circuit

••

Flywheel
•
0

-

Inhibitor switch

00

ATsection
Engine Cylinderhead

•
0

•
•

••

•
0
0

Cylinder headgasket

•
0

()

•
0

•
0
0
00

Cylinder block

•
0

()

0 00 0 00

Piston
•
0
0

•
0
0

•
0
0

Piston ring

•
0
00 0
0 0 00

Connecting rod

00 00
00 0 0

Bearing
000 000 0
0

Crankshaft
00
0 0
0
0 0
0

Valve Timingchain

•
0
0

••
•
0
0 0

mechanism Camshaft

•
0

•• •
0
0 0

Intake valve

•
0
00 0
0

•
0
0
0

Exhaust valve

•
0
00 00 0000

Hydraulic lashadjuster

0000
'0
0 0
-

Exhaust Exhaust
manifoldlTube/Mulfler/Gasket

00
00 0
0
00
0 0

Three waycatalyst

•
0
0

•
0
0 000 0

Lubrication Oilpan/Oil strainer/Oil pump/Oilfilterl

000
0
0 0
0

Oil gallery
••

Oil level (Low)/Filthy oil

00 0000
0 0
0

Cooling Radiator/Hose/Radiator fillercap

00
0 00
0 0 00

Thermostat
00
00 0
0 00 0
00

Water pump

000 000 0 0
0

Water gallery

00 00 00
0 0
0

Cooling fan

00 0
00
0 0
0 0
0
0

Coolant level(low)/Contaminated cool-

00
0000
0 0
0

ant
• ;High Possibility Item
0; Low Possibility Item

EC-276

TROUBLEDIAGNOSIS -General Description
CONSULT Reference ValueinData Monitor
Mode

Remarks:
• Specification dataarereference values.
• Specification dataareoutput/input valueswhicharedetected orsupplied bythe ECM atthe connec-
tor.

*
Specification datamaynotbedirectly relatedtotheir components signals/values/operations.
(Le., Adjust ignition timingwithatiming lightbefore monitoring IGNTIMING. Specification datamight
be displayed evenwhen ignition timingisnot adjusted tospecification. ThisIGNTIMING moni-
tors thedata calculated bythe ECM according tothe input signals fromthecamshaft position
sensor andother ignition timingrelated sensors.)
• Ifthe real-time diagnosis resultsareNG, andtheon-board diagnostic systemresultsareOK, when •
diagnosing themass airflow sensor, firstcheck tosee ifthe fuel pump control circuitisnormal.

MONITOR ITEM CONDITION
SPECIFICATION
CMPS.RPM (REF)•
Tachometer: Connect Almostthesame speed asthe CON-
• Run engine andcompare tachometer indicationwiththeCONSULT value.SULTvalue.
• Engine: Afterwarming up
Idle 1.3-1.7V
MAS AIR/FL SE •
Air conditioner switch:OFF
• Shift lever: "N"
• No-load 2,000
rpm 1.7-2.1V
COOLAN TEMPIS •
Engine: Afterwarming up More
than70°C (15S0F)
02 SEN 0-
0.3V .....0.6 -1.0V
• Engine: Afterwarming up Maintaining
enginespeedat2,000
LEAN
+-->
RICH
MIR
FIC
MNT rpm
Changesmorethan5times
during 10seconds.
VHCL SPEED SE•
Turn drive wheels andcompare speedometer indicationwiththeCONSULT Almostthesame speed as
value the
CONSULT value
BATTERY VOLT •
Ignition switch:ON(Engine stopped) 11
-14V
• Ignition switch:ON Throttle
valvefullyclosed
0.35-0.65V
THRTL
pas
SEN
(Enginestopped)
Throttlevalvefullyopened Approx.4.0V
START SIGNAL •
Ignition switch:ON
->
START
->
ON OFF

->
ON
->
OFF
Throttle valve:
ON
• Ignition switch:ON Idle
position
CLSD THLIPOSI
(Enginestopped)
Throttlevalve:
Slightly open OFF
Air conditioner switch:OFF OFF
AIR COND SIG •
Engine: Afterwarming up,idle the
engine Air
conditioner switch:ON
ON
(Compressor operates)
Shift lever "P"or"N" ON
PIN POSI SW •
Ignition switch:ON
Exceptabove OFF

EC-277

TROUBLEDIAGNOSIS -General Description
[]K]

CONSULT Reference ValueinData Monitor
Mode (Cont'd)

MONITOR ITEM
CONDITION SPECIFICATION
Steering wheelinneutral
position OFF
PW/ST SIGNAL
•Engine: Afterwarming up,idle theengine (forward
direction)
The steering wheelis
ON
turned
• Engine: Afterwarming up
Idle2.5-3.7 msec .
INJ PULSE •
Air conditioner switch:OFF
• Shift lever: "N"
• No-load 2,000
rpm 1.9-2.8 msec .
Idle 13-15° BTDC
IGN TIMING
ditto
2,000rpm Morethan25°BTDC
Idle 20-40%
IACV-AACIV ditto
2,000rpm

-

A/F ALPHA •Engine: Afterwarming up Maintaining
enginespeed
53-155%
at 2.000 rpm
AIR COND RLY •Air conditioner switch:OFF
-+
ON OFF
-+
ON
• Ignition switchis~urned toON (Operates for5seconds)
• Engine running andcranking ON
FUEL PUMP RLY
•When engine isstopped (stopsin1.0 seconds)
• Except asshown above OFF
Engine coolant temperature
is 94°C (201°F) orless for
AfT models. and99°C OFF
(210°F) orless for
M/T
mod-
els
• After warming upengine. idletheengine. Engine
coolant temperature
is between 95°C(203°F) and
COOLING FAN •Air conditioner switch:OFF
104°C(219°F) forA/T mod- LOW
• Vehicle stopped
elsonly
Engine coolant temperature
is 105°C (221°F) ormore for

A/T
models. and100°C HIGH
(212°F) ormore for
M/T

models
• Engine: Afterwarming up
IdleON
EGRC SOLIV •
Air conditioner switch:OFF
• Shift lever: "N"
• No-load 2.000
rpm OFF

EC-278

TROUBLEDIAGNOSIS -General Description
Major Sensor Reference GraphinData Monitor
Mode

•

SEF673Q

-00"09
+02"69

51,
38
THRTL
POSSEN

10:22 xO.1V

o
13 2,6

~
\

.

I
-00"09
+02"69

ON
OfF
Full {~
Release
Full {
Depress

The
following arethemajor sensor reference graphsin"DATA MONITOR" mode.
(Select "HISPEED" in"DATA MONITOR" withCONSULT.)

THRTL POSSEN, CLSD THLIPOSI

Below isthe data for"THRTL
pas
SEN" and"CLSD THLIPOSI" whendepressing theaccelerator pedal
with theignition switch"ON".
The signal of"THRTL
pas
SEN" should risegradually withoutanyintermittent droporrise after "CLSD
THLIPOSI" ischanged from"ON" to"OFF".

CLSD THUPOSI

10:22

CMPS.RPM (REF),MASAIR/FL SE,THRTL POSSEN, 02SEN, INJPULSE

Below isthe data for"CMPS.RPM (REF)","MASAIR/FL SE","THRTL
pas
SEN", "02SEN" and"INJ
PULSE" whenrevving quicklyupto
4,800
rpmunder noload after warming upengine sufficiently.
Each value isfor reference, theexact value mayvary.

E

c.

-8~

u..~

w><

0:

~

Q.
co_

o: ~

en
lO .....,..

Q.C\j

:EOio

()o •
....

,
.

.....
'"

,
...
,
...
""
..
,

............

<',••""", ..,.. ' ,
d _.
•
"CMPS'RPM{REF)" shouldincrease gradually
while depressing theaccelerator pedaland
should decrease graduallyafterreleasing
the pedal without anyintermittent droporrise,

>

:;re-
><

w

(J)

-"
....•

!o!::
C')_

0: ~

C{LO

(J)C\j

"",0>0

",,0
It.
/

....

.0"

.':

"'-",••'\o, "", .".~_•••• _ _.
•
"MAS AIRIFL SE"should increase when
depressing theaccelerator pedalandshould
decrease atthe moment "THRTLPOSSEN" is
closed (accelerator pedalisreleased),
SEF059P
EC-279

TROUBLEDIAGNOSIS -General Description
[![]

ECM Terminals andReference Value(Cont'd)
ECM inspection table

*Dataarereference
values.

TERMINAL WIRE
ITEM
NO. COLOR CONDITION
'DATA
[Engine isrunninQ]
0.2-0.3V
L Idle speed
1
W/B
Ignitionsignal
IEngineisrunning.1
L Engine speedis2,000 rpm. Approximately
0.7V
2 LlOR Tachometer IEngine
isrunning]
Approximately0.9V
L Idle speed
3 GY/R
Ignitioncheck !Engine
isrunning.1
Approximately13V
L Idle speed
IEngine isrunning.1

I

Ilgnition switch"OFF"I
0-1V
ECCS relay(Self-shut- L
For afew seconds afterturning ignition
4
WIG

switch"OFF"
off)
Ilgnitionswitch"OFF"I
BATTERYVOLTAGE
L Afew seconds afterturning ignition switch
(11-14V)
"OFF" andthereafter

6
B/W

ECCSground IEngine
isrunning.1
Engineground
L Idle speed
7
G/B

Approximately13.5V
14
G/W

Datalinkconnector forIEngine
isrunning.1
ApproximatelyOV
15 GY/L CONSULT
LIdle speed Approximately
2.5V
23
G/R

ApproximatelyOV
IEngine isrunning.1
BATTERYVOLTAGE
Cooling fanrelay (Low L
Cooling fanisnot operating. (11
-14V)
9 LG/R
speed) IEngineisrunning.1
L Cooling fanisoperating. Approximately
OV
IEngine isrunning.1
BATTERYVOLTAGE
Cooling fanrelay
t

Cooling fanisnot operating.
(11-14V)
10 LG Cooling
fanisoperating atlow speed.
(High speed)
IEngineisrunning.1
L Cooling fanisoperating athigh speed. Approximately
OV
IEngine isrunning.1
L Both
A/C
switch andblower fanswitch areApproximately
OV
11 Y Airconditioner relay "ON".
IEngine isrunning.1
BATTERYVOLTAGE
LAIC switchis"OFF". (11
-14V)
13
B/W
ECCSground IEngine
isrunning.1
Engineground
L Idle speed

EC-282

TROUBLEDIAGNOSIS -General Description
[ill

ECM Terminals andReference Value(Conl'd)

*Data arereference values.
TERMINAL WIRE
NO. COLOR ITEM
CONDITION *DATA
IEngine isrunning.1 (Warm-up condition)
1.3-1.7V

L
Idle speed
16 OR Mass
airflow sensor
IEngineisrunning.1 (Warm-up condition)
1.7-2.1V

L
Engine speedis2,000 rpm.
17 W Mass
airflow sensor IEngine
isrunning.!
ApproximatelyOV
ground
L
Idle speed
0-5.0V
18 BRIY Engine
coolant tem-
IEngineisrunning.! Output
voltage varies
perature sensor with
engine coolant
temperature.
19 W
Heatedoxygen sensor IEngine
isrunning.1
0-Approximately 1.OV

L
After warming upsufficiently
Ilgnition switch"ON"I(Warm-up condition)
0.35-0.65V
Throttle position sen-
L

Accelerator pedalreleased
20 Y
sor Ilgnitionswitch"ON"I

L
Approximately
4V
Accelerator pedalfullydepressed
21 B Sensor'sground IEngine
isrunning.1
ApproximatelyOV

L
Idle speed
22 Camshaft
position
30 L
sensor
(Reference IEngineisrunning.1 0.1
-O.4V
signal)
jlgnitionswitch"ON"!
Approximately1.5V
24 ORIL Malfunction
indicator
lamp IEngineisrunning.1 BATTERY
VOLTAGE
(11 -14V)
27 W Knock
sensor IEngine
isrunning.1
Approximately2.5V

L
Idle speed
29 B Sensor's
ground IEngine
isrunning.1
ApproximatelyOV

L
Idle speed
31 Camshaft
position
40
S/W

sensor
(Position sig-
IEngineisrunning.! 2.0
-3.0V
nal)
Ilgnitionswitch"ON"I
32 PUIR
Vehiclespeedsensor
t

Eng;ne "opped andge., po,;!;on ;,"Neo-

Variesfrom0to 5V
tral position".
While rotating drivewheel byhand
Ilgnition switch"ON"!
ApproximatelyOV
34
BIY
Start
signal
Ilgnitionswitch"START"I SA
TTERY VOLTAGE
(11 -14V)

EC-283
•

TROUBLEDIAGNOSIS -General Description
[]:KJ

ECM Terminals andReference Value(Cont'd)
*Data arereference values.
TERMINAL WIRE
ITEM CONDITION *
DATA
NO. COLOR
/Ignitionswitch"ON'"

t
"N" or"P" position
(A/T)
OV
35
G/OR
Neutral
position
Neutralposition
(M/T)

switch/lnhibitor switch
I'gnitionswitch"ON"I
BATTERYVOLTAGE

L
Except theabove gearposition (11
-14V)
I'gnition switch"OFF"I
OV
36 B/R Ignition
switch
Ilgnitionswitch"ON"I BATTERY
VOLTAGE
(11 -14V)
37 P/L Throttle
position sen-
pgnition switch"ON"I
Approximately5V
sor power supply
38 Powersupply forECM
Ilgnition switch"ON"I BATTERY
VOLTAGE
47 W/R
(11-14V)
39 B ECCSground IEngine
isrunning.1
Engineground

L
Idle speed
IEngine isrunning.!

L
Both airconditioner switchandblower fanApproximately
OV
41 G Air
conditioner switch switch
are"ON".
IEngine isrunning.1
BATTERYVOLTAGE

L
Airconditioner switchis"OFF". (11
-14V)
IEngine isrunning.1
OV
Power steering oil
L

Steering wheelisbeing turned.
43 PUlW
pressureswitch
IEngineisrunning.1

L
Steering wheelisnot being turned. 7
-9V
46 W/L Power
supply
I'gnitionswitch
"0FFj
BATTERY
VOLTAGE
(Back-up) (11-14V)
48 B ECCSground IEngine
isrunning.1
Engineground

L
Idle speed
109 W/L Currentreturn
Ilgnitionswitch"OFF"I BATTERY
VOLTAGE
(11 -14V)
101 RIB InjectorNo.1
103
G/B
InjectorNo.3
BATTERYVOLTAGE
110 Y/B InjectorNO.2 IEngine
isrunning.1
(11-14V)
112 LIB InjectorNO.4
EC-284

TROUBLEDIAGNOSIS -General Description
[]K]

ECM Terminals andReference Value(Cont'd)

'Data arereference values.
TERMINAL WIRE
ITEM CONDITION
'DATA
NO. COLOR
Ilgnitionswitch"ON"I

L
For 5seconds afterturning ignition switch
"ON" Approximately
OV
104 B/P Fuelpump relay !Engine
isrunning.1
Ilgnition switch"ON"I
BATTERY VOLTAGE

L
5seconds afterturning ignitionswitch
(11-14V)
"ON" andthereafter
IEngine isrunning.1
0.6-0.8V
EGR valve
&
EVAP

.L
Engine speedis4,000 rpm.
105 P canisterpurgecontrol
solenoid valve IEngine
isrunning.1
BATTERYVOLTAGE

L
Idle speed (11
-14V)
107 IEngine
isrunning.j
B/Y ECCSground

L
Engine
ground
108 Idlespeed
!Engine isrunning.1
Approximately0.2V

L
Engine speedisbelow 3,200rpm.
Heated oxygen sensor
111 OR
heater IEngineisrunning.1
BATTERY VOLTAGE

L
Engine speedisabove 3,200rpm. (11
-14V)
IEngine isrunning.\
11-14V

L
Idle speed
113 SB IACV-AAC
valve lEngine
isrunning.1

~ Sle«;ng wheel;,be;ng I"med

2-11V
Air conditioner isoperating.
Rear window defogger switchis"ON".
Lighting switchis"ON".
!Engine isrunning.1
ApproximatelyOV
Torque converter
L

Idle speed
115 P/B clutch
solenoid valve
IEngineisrunning.1 (Warm-up condition)

(A/T
models)

L
Vehicle speedis60 km/h (37MPH) or BA
TTERY VOLTAGE
(11 -14V)
more in"D" position
116 BIY ECCS
ground IEngine
isrunning.1
Engineground

L
Idle speed

EC-285
•

TROUBLEDIAGNOSIS FORPOWER SUPPLY
[]K]

Main Power Supply andGround Circuit(Cont'd)

II Il

~i)
ECM
Er
CONNECTOR
II

36

~i)
ECM
EfCONNECTORI!

~$

Lwt
INSPECTION
START
Start engine.

Is engine running?

Yes

MEC746B
No

--+
CHECK
POWER SUP-
PL V-I.
1. Turn ignition switch

"ON".

2. Check voltage between
ECM terminal @and
ground withCONSULT
or tester.

Voltage: Batteryvolt-
age

If NG, check thefollow-
ing .
• Harness connectors

@,@

• Harness connectors

OO,@l)

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

MEC714B
~OK
Go to
III
"CHECK
GROUND CIRCUIT" on
next page.
Check thefollowing.
• Harness connectors

@,@

• Harness connectors

OO,@l)

• 7.5A fuse
• Harness foropen or
short between ECM
and battery
If NG, repair harness or
connectors.
Case-1: Batteryvoltage
does notexist.
Case-2: Batteryvoltage
exists formore than
a few seconds.
OK

--+
Goto
III
"CHECK
GROUND CIRCUIT" on
next page.
NG

--+

CHECK POWER SUPPLV-III.
1. Turn ignition switch"ON"andthen

"OFF".

2. Check voltage between ECMterminals

@,
@
and ground withCONSULT
or tester.

Voltage:
After turning ignition switch"OFF",
battery voltage willexist forafew
seconds, thendrop toapproximately

QV.

CHECK
POWER SUPPLV.II.
1. Stop engine.
2. Check voltage between ECMterminals

@l ,
(ill)
andground withCONSULT
or tester.

Voltage: Batteryvoltage

MEC747BI OK
MEC748B

~
CONNECTOR
II

38' 47

"--.--'

ECM

Il

@
NG
Case-2
Case-1 Go
to
[it
"CHECK ECCS
RELA Y"onnext page.
EC-287

TROUBLEDIAGNOSIS FORPOWER SUPPLY
[gJ

Main Power Supply andGround Circuit(Cont'd)

@

~IV ~i5

Ie
ECM E!'CONNECTORI! +351

38.47

~
SEF460Q

ts
3 2
1

5
I!]

CHECK HARNESS CONTINUITY
BETWEEN ECCSRELAY ANDECM

1. Disconnect ECMharness connector.
2. Disconnect ECCSrelayharness con-
nector.
3. Check harness continuity between
ECM terminals
@,@
and terminal

@.
Continuity shouldexist.

If OK, check harness forshort.

OK
CHECK VOLTAGE BETWEEN ECCS
RELAY ANDGROUND.

Check voltage between terminals
(!),

@
and ground withCONSULT or
tester.
Voltage: Batteryvoltage NG
NG
Repair
harness orcon-
nectors.
Check thefollowing.
• Harness connectors

@,@

• Harness connectors

@,

• Harness foropen or
short between ECCS
relay andbattery
If NG, repair harness or
connectors.
Repair harness orcon-
nectors.
Replace ECCSrelay.

NG

NG
OK
OK

[!1

CHECK ECCSRELAY.

1. Apply 12Vdirect current between
relay terminals
(!)
and
@.

2. Check continuity betweenrelayter-
minals
@
and
@.

12V
«(!) .
@) applied:
Continuity exists.
No voltage applied:
No continuity

Ii

CHECK OUTPUT SIGNALCIRCUIT.

Check harness continuity betweenECM
terminal
@
and terminal
@.
Continuity shouldexist.

If OK, check harness forshort.

AEC684
AEC492

~i5

•

JO[CONNECTOR

II

4

ECM

Ii

OK

III

CHECK GROUND CIRCUIT.

1. Turn ignition switch"OFF".
2. Loosen andretighten engineground
screws.
3. Disconnect ECMharness connector.
4. Check harness continulty between
ECM terminals
@,
@,@,
@,

@,
COO,GID
andengine ground.

Continuity shouldexist. .

If OK, check harness forshort.
NG

Repair harness orcon-
nectors.

SEF090M OK

III

~15@a

II
ECM ~CONNECTOR
II

6'13'39048'107'108'116

.
.

LEn
Check
ECMpinterminals fordamage
and check theconnection ofECM har-
ness connector.
INSPECTION END

SEF461Q EC-288