engine NISSAN ALMERA N15 1995 Service Manual

TROUBLEDIAGNOSIS FORDTC11 @KJ
Camshaft PositionSensor(CMPS) (Cont'd)
DIAGNOSTIC TROUBLECODECONFIRMATION
PROCEDURE

fiii\
1)Turn ignition switch"ON"andselect "DATA

\JV
MONITOR" modewithCONSULT.
2) Crank engine foratleast 2seconds.

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

~ 1)Crank engine foratleast 2seconds.
~ 2)Turn ignition switch"OFF", waitforatleast 5seconds
and then turn"ON".
3) Perform "Diagnostic TestMode II"(Self-diagnostic
results) withECM.

EC-95
•

•

Repair harness orcon-
nectors.
Check
thefollowing.
• Harness foropen or
short between camshaft
position sensorand
ECCS relay
If NG, repair harness or
connectors .

NG
NG
CHECK
POWER SUPPLY.

1. Turn ignition switch"OFF".
2. Disconnect camshaftpositionsensor
harness connector.
3. Turn ignition switch"ON".
4. Check voltage between terminal

@
and ground withCONSULT or
tester.

Voltage: Batteryvoltage
CHECK GROUND CIRCUIT.

1. Turn ignition switch"OFF".
2. Loosen andretighten engineground
screws.
3. Check harness continuity between
terminal
@
and engine ground.

Continuity shouldexist.

If OK, check harness forshort.

AEC815
SEF524Q
TROUBLE
DIAGNOSIS FORDTC11 ~
Camshaft PositionSensor(CMPS) (Conl'd)

Camshaft positionsensor
DIAGNOSTIC PROCEDURE

harness connector

\ INSPECTIONSTART
Trouble isnot fixed.

~i5

@a

(i1'lmI51~ CHECK
INPUTSIGNAL CIRCUIT.

1. Disconnect ECMharness connector.
2. Check harness continuity between
terminal
@
and ECM terminals
@.

@),
or
@,
@
or
@, @
terminal

@
and ECM terminals
@),
@
or

@,@.
SEF463Q Continuityshouldexist.

If
OK, check harness forshort.

OK

CHECK COMPONENT
(Camshaft positionsensor).
Refer to"COMPONENT INSPECTION"
on next page.

OK

Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.
INSPECTION END
NG

Repair
harness orcon-
nectors.
Replace camshaft position
sensor.

EC-99

TROUBLEDIAGNOSIS FORDTC11 @KJ
Camshaft PositionSensor(CMPS) (Cont'd)

@]
~io
~IO

Il
ECM ECONNECroRl1
~JlI0

~29, ~
@,
@:
ForIsrael
@,
@:
ForEurope

~ IDISCO~

l41
V
~io

1=1
=E=CM=:!iE[il=CO=NN=EC=ro=RII

~~TGo[rnID

@,
@,
@,
@ :
Except forAustralia

@,@,@,@ :
For Australia
@a

SEF137R
COMPONENT INSPECTION
Camshaft positionsensor

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

CID,
@
and ground withACrange.
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.
AEC689
SEF887K
Terminal

@ :
Except forEurope andIsrael

@:
ForEurope andIsrael
(180.

signal)

@ :
Except forEurope andIsrael

(1.
signal) Voltage
Tester's pointerfluctuates between
5V and OV.

EC-100

TROUBLEDIAGNOSIS FORDTC12
Mass AirFlow Sensor (MAFS)

The mass airflow sensor measures theintake airflow rateby
taking apart ofthe entire flow.Measurements aremade insuch
a manner thattheECM receives electrical outputsignals var-
ied bythe amount ofheat emitting fromthehotwire placed in
the stream ofthe intake air.
When intake airflows intotheintake manifold througharoute
around thehotwire, theheat generated fromthehotwire is
taken awaybythe air.The amount ofheat depends onthe air
flow. Onthe other hand, thetemperature ofthe ..hot wire is

SEF154N
automatically controlledtoacertain number ofdegrees.
Therefore, itis necessary tosupply thehotwire withmore •
electric currentinorder tomaintain thetemperature ofthe hot
wire. TheECM knows theairflow bymeans ofthe electric
c~ange.

SEF695K

Diagnostic Trouble
Code No. Malfunction
isdetected when... Check
Items
(Possible Cause)

12
•
An excessively highorlow voltage fromthesensor •Harness orconnectors
is entered toECM. (Thesensor circuitisopen orshorted.)
• Mass airflow sensor

DIAGNOSTIC TROUBLECODECONFIRMATION
PROCEDURE
rif\
1)Turn ignition switch"ON",andwait foratleast 6
~ seconds.
2) Select "DATA MONITOR" modewithCONSULT.
3) Start engine andwait foratleast 3seconds.

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

r 1)Turn ignition switch"ON",andwait foratleast 6
~ seconds.
2) Start engine andwait foratleast 3seconds.
3) Turn ignition switch"OFF", waitforatleast 5seconds
and then turn"ON".
4) Perform "Diagnostic TestMode II"(Self-diagnostic
results) withECM.

EC-101

TROUBLEDIAGNOSIS FORDTC12
Mass AirFlow Sensor (MAFS) (Coni'd)

GA14DE, 16DEengine forEurope andIsrael, andGA15DE engine

W/R

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.
EC-MAFS-01

MASS AIR
FLOW SENSOR


W
JOINTCONNECTOR

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ECM I..J
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(ECCS •

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G

:

LHDmode 1s

@:
RHOmodels
@: ForEurope andIsrae 1

@:
Except@
_. Detectable line
for DTC
-: Non-detectable
line forDTC
~ B
~~ B B

~ ":91

GND GND

-A -A

t

7.5A
RefertoEL-POWER.

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~RL (JOINTCONNECTORS)

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