display NISSAN ALMERA N15 1995 Owner's Guide

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION
CONSULT (Cont'd)
REAL TIMEDIAGNOSIS INDATA MONITOR MODE

CONSULT hastwo kinds oftriggers andthey canbeselected bytouching "SETTING" in"DATA
MONITOR" mode.
1. "AUTO TRIG"(Automatic trigger):
• The malfunction willbeidentified onthe CONSULT screeninreal time.
In other words, DTCandmalfunction itemwillbedisplayed atthe moment themalfunction is
detected byECM.
DATA MONITOR canbeperformed continuously untilamalfunction isdetected. However, DATA
MONITOR cannotcontinue anylonger afterthemalfunction detection.
2. "MANU TRIG"(Manual trigger):
• DTC andmalfunction itemwillnotbedisplayed automatically onCONSULT screeneventhough a
malfunction isdetected byECM. •
DATA MONITOR canbeperformed continuously eventhough amalfunction isdetected.
Use these triggers asfollows:
1. "AUTO TRIG"
• While trying todetect theDTC byperforming the"DTC CONFIRMATION PROCEDURE",besure to
select to"DATA MONITOR (AUTOTRIG)" mode.Youcanconfirm themalfunction atthe moment
it is detected .
• While narrowing downthepossible causes,CONSULT shouldbeset in"DATA MONITOR (AUTO
TRIG)" mode,especially incase theincident isintermittent.
Inspect thecircuit bygently shaking (ortwisting) suspicious connectors, components andharness
in the "DTC CONFIRMATION PROCEDURE".Themoment amalfunction isfound theDTC willbe
displayed. (RefertoGI section, "Incident Simulation Tests"in"HOW TOPERFORM EFFICIENT
DIAGNOSIS FORANELECTRICAL INCIDENT".)
2. "MANU TRIG"
• Ifthe malfunction isdisplayed assoon as"DATA MONITOR" isselected, resetCONSULT to
"MANU TRIG".Byselecting MANUTRIGyoucan monitor andstore thedata. Thedata canbe
utilized forfurther diagnosis, suchasacomparison withthevalue forthe normal operating con-
dition.

ECM INPUT SIGNALS
HISPEED

AUTO
TRIG

I
~
SELECT MONITOR ITEM

I
MAIN SIGNALS

I
SELECTION FROMMENU

1 _

1========

l-SE-TI-IN-G
ll--S-T.-AR-T--
I
~
SET RECORDING COND

I
MANU TRIG

I
LONG TIME HI
SPEED MANU
TRIG

__ 1__ J

"SETIING" "AUTOTRIG"
A malfunction canbe
displayed on"DATA
MONITOR" screen
automatically ifdetected.
EC-263 "MANU
TRIG"
A malfunction cannotbe
displayed on"DATA
MONITOR" screen
automatically evenif
detected.
SEF6740

STEP
STEP I
STEP II
STEP III
STEP IV
STEP V
STEP VI
STEP VII
TROUBLE
DIAGNOSIS -General Description
Description forWork Flow

DESCRIPTION
Get detailed information abouttheconditions andtheenvironment whentheincident/symptom occurred
using the"DIAGNOSTIC WORKSHEET" asshown onthe next page.
Before confirming theconcern, checkandwrite down (printoutusing CONSULT) theDiagnostic Trouble
Code (DTC), thenerase thecode. TheDTC canbeused when duplicating theincident atSTEP
1/1
&
IV.
Study therelationship betweenthecause, specified byDTC, andthesymptom described bythe customer.
(The "Symptom MatrixChart" willbeuseful. RefertoEC-274.)
Try toconfirm thesymptom andunder whatconditions theincident occurs.
The "DIAGNOSTIC WORKSHEET" isuseful toverify theincident. ConnectCONSULT tothe vehicle inDATA
MONITOR (AUTOTRIG)modeandcheck realtime diagnosis results.
If the incident cannotbeverified, performINCIDENT SIMULATION TESTS.RefertoGI section.
If the malfunction codeisdetected, skipSTEP IVand perform STEPV.
Try todetect theDiagnostic TroubleCode(DTC) bydriving in(or performing) the"DTC CONFIRMATION
PROCEDURE". Checkandread theDTC byusing CONSULT.
During theDTC verification, besure toconnect CONSULT tothe vehicle inDATA MONITOR (AUTOTRIG)
mode andcheck realtime diagnosis results.
If the incident cannotbeverified, performINCIDENT SIMULATION TESTS.RefertoGI section.
In case the"DTC CONFIRMATION PROCEDURE"isnot available, performthe"OVERALL FUNCTION
CHECK" instead.TheDTC cannot bedisplayed bythis check, however, thissimplified "check"isan effec-
tive alternative.
The "NG" result ofthe "OVERALL FUNCTIONCHECK"isthe same asthe DTC detection.
Take theappropriate actionbasedonthe results ofSTEP Ithrough IV.
If the malfunction codeisindicated, proceedtoTROUBLE DIAGNOSIS FORDTCXX.
If the normal codeisindicated, proceedtothe BASIC INSPECTION. RefertoEC-271. Thenperform inspec-
tions according tothe Symptom MatrixChart.RefertoEC-274.
Identify wheretobegin diagnosis basedonthe relationship studybetween symptom andpossible causes.
Inspect thesystem formechanical binding,looseconnectors orwiring damage using(tracing) "Harness
Layouts".
Gently shaketherelated connectors, components orwiring harness withCONSULT setin"DATA MONITOR
(AUTO TRIG)" mode.
Check thevoltage ofthe related ECMterminals ormonitor theoutput datafrom therelated sensors with
CONSULT. RefertoEC-277.
The "DIAGNOSTIC PROCEDURE" inEC section contains adescription basedonopen circuit inspection. A
short circuit inspection isalso required forthe circuit checkinthe DIAGNOSTIC PROCEDURE. Fordetails,
refer toGI section ("HOWTOPERFORM EFFICIENT DIAGNOSIS FORANELECTRICAL INCIDENT","Circuit
Inspection").
Repair orreplace themalfunction parts.

.

Once youhave repaired thecircuit orreplaced acomponent, youneed torun theengine inthe same condi-
tions andcircumstances whichresulted inthe customer's initialcomplaint.
Perform the"DTC CONFIRMATION PROCEDURE"andconfirm thenormal code(Diagnostic troublecodeNo.
55) isdetected. Ifthe incident isstill detected inthe final check, perform STEPVIby using adifferent
method fromtheprevious one.
Before returning thevehicle tothe customer, besure toerase theunnecessary (alreadyfixed)DTCinECM.
(Refer toEC-252.)

EC-266

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 FORDTC11 [][]
Camshaft PositionSensor(CMPS) (Cont'd)
COMPONENT INSPECTION
Camshaft positionsensor

1. Start engine.
2. Check voltage between camshaft positionsensorterminals

CID,
@
and ground withACrange.

~i)ID

dID

Condition
Engine running atidle Terminal
@and ground
@and ground Voltage
(ACrange)
Approximately
2.7V'

AEC689
SEF887K *:

Average voltageforpulse signal (Actual pulsesignal canbeconfirmed
by oscilloscope.)
3. IfNG, replace distributor assemblywithcamshaft position
sensor.
4. Remove distributor cap.Visually checksignal platefordam-
age ordust.

After thisinspection, diagnostictroublecodeNo.11might be
displayed withcamshaft positionsensorfunctioning properly.
Erase thestored memory.
EC.292

TROUBLEDIAGNOSIS FORDTC21
Ignition Signal
COMPONENT DESCRIPTION
Ignition coil
&
power transistor (Builtintodistributor)

The ignition coilisasmall molded type.Theignition signalfrom
the ECM issent tothe power transistor. Thepower transistor
switches onand offthe ignition coilprimary circuit.Asthe pri-
mary circuit isturned onand off,the proper highvoltage is
induced inthe coil secondary circuit.

Diagnostic Trouble
Code No.

21
Malfunction
isdetected when...
• The ignition signalinthe primary circuitisnot sent
to ECM during engine cranking orrunning. Check
Items
(Possible Cause)
• Harness orconnectors
(The ignition primary circuitisopen orshorted.)
• Power transistor unit.
• Resistor
• Camshaft positionsensor
• Camshaft positionsensorcircuit
•

DIAGNOSTIC TROUBLECODECONFIRMATION
PROCEDURE
Note: Ifboth DTC11and 21are displayed, performTROUBLE
DIAGNOSIS FORDTC11first. Refer toEC-289.

(F.I\ 1)Turn ignition switch"ON".
~ 2)Select "DATA MONITOR" modewithCONSULT.
3) Start engine. (Ifengine doesnotrun, turn ignition
switch to"START" foratleast 5seconds.)

---------- OR----------

~ 1)Turn ignition switch"ON".
~ 2)Start engine. (Ifengine doesnotrun, turn ignition
switch to"START" foratleast 5seconds.)
3) Turn ignition switch"OFF", waitatleast 7seconds
and then turn"ON".
4) Perform "Diagnostic TestMode II"(Self-diagnostic
results) withECM.

EC-301

•

INSPECTION
START

m
CHECK OVERALL FUNCTION.
~INSPECTION
END
1. Start engine andwarm itup suffi-
ciently.
2. Perform diagnostic testmode II(Self-
diagnostic results).
Make surethatDiagnostic trouble
code No.12isnot displayed.
3. Keep
engine speedatabout 2,000
rpm. Make surethatEGR valve
spring moves upand down when
engine israced toabout 4,000rpm.
(Use yourfinger.)
NG

m
CHECK VACUUM SOURCETOEGR OK
CHECK COMPONENTS

----..

VALVE. (EGR
valve andEGRC-
1. Disconnect vacuumhosetoEGR BPT
valve).
valve. Refer
to"COMPONENT
2. Disconnect
vacuumhosetoEVAP INSPECTION",
EC-323
canister.
3. Check vacuum existence underthe NG
following conditions.
Engine speedis4,000 rpm:
Vacuum shouldnotexist.
Replacemalfunctioning
Engine speedis2,000 rpm:
component(s).
Vacuum shouldexist.
NG

[!J
(!]

CHECK CONTROL FUNCTION. OK
CHECK VACUUM HOSE.

-----.-

Check voltage between ECMterminal Check
vacuum hosefor

@
andground underthefollowing clogging,
cracksor
conditions. improper
connection.
Engine speedis4,000 rpm
0.6 -O.BV
Engine speedis2,000 rpm
Battery voltage
~NG

+
-
MEF637B
MEF955D
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[1[J

Exhaust GasRecirculation (EGR)Valveand
EVAP Canister PurgeControl (Cont'd)
DIAGNOSTIC PROCEDURE

~)5
~~II
EGRC-BPT valve
~~uu~ hose
connected toEGR valve~

(
~
'

MEC761B
Clogging

[!J

r----, ~
CONNECT

II
ECM ~CONNECTORIIl.imJ
£)

105

::::.S.-

~P"P"
'00","'00

MEF521E
EC-321

PRECAUTIONSANDPREPARATION
Precautions forService Equipment
RECOVERY/RECYCLING/RECHARGING EQUIPMENT

Be certain tofollow themanufacturers instructionsformachine
operation andmachine maintenance. Neverintroduce any
refrigerant otherthanthatspecified intothemachine.

ELECTRONIC LEAKDETECTOR

Be certain tofollow themanufactures instructionsfortester
operation andtester maintenance.

With isolator valve
Without isolatorvalve
VACUUM
PUMP

Hose fittings:

1/2".16ACME
Thelubricant contained insidethevacuum pumpisnot compat-
ible with thespecified lubricantforHFC-134a (R-134a)
AIC
sys-
tems. Thevent sideofthe vacuum pumpisexposed toatmo-
spheric pressure. Sothe vacuum pumplubricant maymigrate
out ofthe pump intotheservice hose.Thisispossible whenthe
pump isswitched offafter evacuation (vacuuming) andhose is
connected toit.
To prevent thismigration, useamanual valveplaced nearthe
hose-to-pump connection,asfollows.
• Usually vacuum pumpshaveamanual isolatorvalveaspart
of the pump. Closethisvalve toisolate theservice hose
from thepump.
• For pumps without anisolator, useahose equipped witha
manual shut-off valvenearthepump end.Close thevalve
to isolate thehose fromthepump.
• Ifthe hose hasanautomatic shutoffvalve, disconnect the
hose fromthepump. Aslong asthe hose isconnected, the
valve isopen andlubricating oilmay migrate.
Some one-way valvesopenwhen vacuum isapplied andclose
under ano vacuum condition. Suchvalves mayrestrict the
pump's abilitytopull adeep vacuum andarenotrecom-

RHA270D
mended.

MANIFOLD GAUGESET

Be certain thatthegauge faceindicates R-134aor134a. Besure
the gauge sethas
1/2"-16
ACMEthreaded connections forser-
vice hoses. Confirm theset has been usedonlywith refriger-
ant HFC-134a (R-134a)andspecified lubricants.

~

1f2"-16ACME

SHA533D

Hose fittings to
manifold gaugeorrecovery/recycling
equipment; 1/2"-16ACME

RHA272DSERVICE
HOSES

Be certain thattheservice hosesdisplay themarkings
described (coloredhosewithblack stripe). Allhoses must
include positive shutoffdevices (eithermanual orautomatic)
near theend ofthe hoses opposite themanifold gauge.

HA-8

TROUBLEDIAGNOSES -Supplemental RestraintSystem(SRS)
How toPerform TroubleDiagnoses forQuick
and Accurate Repair

A good understanding ofthe malfunction conditionscanmake troubleshooting fasterandmore accurate.
In general, eachcustomer feelsdifferently aboutaproblem. Itis important tofully understand the
symptoms orconditions foracustomer complaint.

INFORMATION FROMCUSTOMER

WHAT Vehiclemodel
WHEN Date,Frequencies
WHERE Roadconditions
HOW Operatingconditions, Symptoms

PRELIMINARY CHECK

Check thatthefollowing partsareingood" order.
• Battery [RefertoMA section ("GENERAL MAINTENANCE").]
• Fuse [Refer toEL section ("Fuse", "POWER SUPPLYROUTING").]
• System component-to-harness connections

DIAGNOSIS FUNCTION

The SRS self-diagnosis resultscanberead byusing "AIRBAG" warning lampand/or CONSULT.

USING WARNING LAMP
USINGCONSULT
User mode Diagnosismode
Dual airbag system
X
X X

Single airbag system
X

Seat beltpre-tensioner

The reading ofthese results isaccomplished usingoneoftwo modes -"User mode" and"Diagnosis
mode".
The User mode isexclusively preparedforthe customer (driver).Thismode warns thedriver ofasys-
tem malfunction throughtheoperation ofthe "AIR BAG" warning lamp.
The Diagnosis modeallows thetechnician tolocate andinspect themalfunctioning part.
The mode applications forthe "AIR BAG" warning lampandCONSULT areasfollows:

User mode Diagnosis
mode Displaytype
"AIR BAG" warning lamp
X
X
ON-OFF
operation
CONSULT
X

Monitoring

Seat beltpre-tensioner cannotbediagnosed byusing warning lampand/or CONSULT. Whenseatbelt
pre-tensioner isrequires servicing, visuallycheckseatbeltpre-tensioner assembly.Ifdamaged, replace
with anew one.

DIAGNOSIS MODEFORCONSULT (ForDual AirBag System)

• SELF-DIAG RESULTS
A current Self-diagnosis result(alsoindicated bythe number ofwarning lampflashes inthe Diag-
nosis mode) isdisplayed onthe CONSULT screeninreal time. Thisrefers toamalfunctioning part
requiring repairs.

RS-25
•

SRS102
TROUBLE
DIAGNOSES -Supplemental RestraintSystem(SRS)
How toPerform TroubleDiagnoses forQuick
and Accurate Repair(Cont'd)

• ECU DISCRIMINATED NO.
The diagnosis sensorunitforeach vehicle modelis
assigned withitsown, individual classification number.This
number willbedisplayed onthe CONSULT screen,as
shown atleft. When replacing thediagnosis sensorunit,
refer tothe part number forthe compatibility. After
installation, replacement withacorrect unitcan bechecked
by confirming thisclassification numberonthe CONSULT
screen.

For NISSAN modelN15,thediagnosis sensorunitclassifi-
cation number assigned is09.

•
ECU DISCRIMINATED No.•

ECU No.

09

RS-26

TROUBLEDIAGNOSES -Supplemental RestraintSystem(SRS)-
Dual AirBag System
Self-diagnosis (Cont'd)
DIAGNOSTIC PROCEDURE2
(00
withCONSULT)
Inspecting SRSmalfunctioning partsbyusing CONSULT -
Diagnosis mode

1. Turn ignition switch"OFF".
2. Connect "CONSULT" toData linkconnector.

MRS124A
AIRBAG SELF-DIAG RESULTS
NISSAN
CONSULT
START
SUB MODE
I

SRS046

I ~
SELECT SYSTEM
01

I
ENGINE
1
1 '

1-----1

I
I

I 1

MRS125A

I ~
SELECT DIAGMODE
01

I
ECUDISCRIMINATED NO.
I

'======

1 -
1 -

1========
SRS043
• SELF-DIAG RESULTS.
0

FAILURE DETECTED
CONTROL UNIT

I
ERASE
II
PRINT
I

SRS064
3.
Turn ignition switch"ON".
4. Touch "START".
5. Touch "AIRBAG".
6. Touch "SELF-DIAG RESULTS".
7. Diagnostic codesaredisplayed on"SELF-DIAG RESULTS".

RS-33
•