1995 NISSAN ALMERA N15 check engine

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

•

Repair
harness orcon-
nectors.
Repair harness orcon-
nectors.
Replace massairflow
sensor. Repair
harness orcon-
nectors.
NG
NG
NG
NG
INSPECTION
START
CHECK POWER SUPPLY.
1. Turn ignition switch"OFF".
2. Disconnect massairflow sensor har-
ness connector.
3. Turn ignition switch"ON".
4. Check voltage between terminal
@

and ground withCONSULT ortester.
Voltage: Batterypositive voltage
CHECK INPUTSIGNAL CIRCUIT.
Check harness continuity betweenter-
minal
CD
and ECM terminal
@
or@.
Continuity shouldexist.
If OK, check harness forshort.
INSPECTION END
OK
Trouble isnot fixed.
CHECK
GROUND CIRCUIT.
1. Turn ignition switch"OFF".
2. Disconnect ECMharness connector.
3. Loosen andretighten engineground
screws.
4. Check harness continuity between
terminal
@
and ECM terminal
@
or

@
orengine ground.
Continuity shouldexist.
If OK, check harness forshort.
CHECK COMPONENT
(Mass airflow sensor).
Refer to"COMPONENT INSPECTION"
on page EC-107.
Disconnect andreconnect harnesscon-
nectors inthe circuits. Thenretest.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.
SEF138R
TROUBLE
DIAGNOSIS FORDTC12
Mass AirFlow Sensor (MAFS) (Conl'd)
DIAGNOSTIC PROCEDURE
For Europe ~GA 15DE engine
and Israel
I~
",,~~)rl

\~\" /JJ~

11'
Mass airflow sensor
_ harness connector

==---,

I-

I
I

d.-
I

;~

*1 ForEurope andIsrael, andGA15DE engine
*2 :GA 16DE engine models exceptfor
Europe andIsrael SEF139R
~
Mass airflow sensor
~(~lr~~

,~\ C/

Power steering \'
tluic! reservxr ..--\ /,'"

W~
Meo,"""
EC-105

•

Voltage
V
Less than1.0
Conditions
Ignition switch"ON"(Engine stopped.)

Mass
airflow sensor

1. Turn ignition switch"ON".
2. Start engine andwarm itup sufficiently.
3. Check voltage between terminal
CD
and ground.
Idle (Engine iswarmed-up sufficiently.) 1.2-1.8
4. IfNG, remove massairflow sensor fromairduct. Check hot
wire fordamage ordust.

TROUBLE
DIAGNOSIS FORDTC12
Mass AirFlow Sensor (MAFS) (Cont'd)
COMPONENT INSPECTION

- -

* 1:For Europe andIsrae( andGA15DE engine
models
*2 :GA 16DE engine models exceptfor
Euro eand Irael SEF142R
SEF154N
EC-107

TROUBLEDIAGNOSIS FORDTC13
SEF594K Engine
Coolant Temperature Sensor(ECTS)

The engine coolant temperature sensorisused todetect the
engine coolant temperature. Thesensor modifies avoltage sig-
nal from theECM. Themodified signalreturns tothe ECM as
the engine coolant temperature input.Thesensor usesather-
mistor whichissensitive tothe change intemperature. The
electrical resistance ofthe thermistor decreases astempera-
ture increases.

20
18
6
9 4

B
2

Iii
10

1ii
0.8

'0

£ 0.4
0.2
0.1 -20 020 40 60 80100
(-4) (32) (68)(104)(140)(176)(212)
Temperature 'C
(OF)

SEF012P
<

Reference data>

Engine coolant temper-
Voltage Resistance
ature
'C ('F) (V)

(kQ)
-10 (14) 4.47.0-11.4
20 (68)
3.52.1-2.9
50 (122)
2.20.6-1.0
90 (194) 0.9
0.23-0.26

Diagnostic
Trouble Code

No.
Malfunction
isdetected when... Check
Items
(Possible Cause)

13
•An excessively highorlow voltage fromthesensor •Harness orconnectors
is entered toECM. (Thesensor circuitisopen orshorted.)
• Engine coolant temperature sensor

DIAGNOSTIC TROUBLECODECONFIRMATION
PROCEDURE

(F.i\
1)Turn ignition switch"ON".
~ 2)Select "DATA MONITOR" modewithCONSULT.
3) Wait foratleast 5seconds.

------------OR------------
fU\
1)Turn ignition switch"ON"andwait foratleast 5sec-
~ onds.
2) Turn ignition switch"OFF", waitforatleast 5seconds
and then turn"ON".
3) Perform "Diagnostic TestMode II"(Self-diagnostic
reSUlts) withECM.

EC-108

•

Replace enginecoolant
temperature sensor.
Check
thefollowing.
• Harness foropen or
short between ECM
and engine coolant
temperature sensor
If NG, repair harness or
connectors.
Check thefollowing.
• Harness foropen or
short between ECM
and engine coolant
temperature sensor
If NG, repair harness or
connectors.

NG
NG
NG

CHECK COMPONENT
(Engine coolanttemperature sensor).
Refer to"COMPONENT INSPECTION"
on next page.INSPECTION
START

m
CHECK POWER SUPPLY.

1. Turn ignition switch"OFF".
2. Disconnect enginecoolant tempera-
ture sensor harness connector.
3. Turn ignition switch"ON"
4. Check voltage between terminal @
and ground withCONSULT ortester.

~oltage:
Approximately SV
SEF519Q
Ii)

CHECK GROUND CIRCUIT.

1. Turn ignition switch"OFF".
2. Check harness continuity between

SEF518Q
terminal
G)
and engine ground.

Continuity shouldexist.

If OK, check harness forshort.

TROUBLE
DIAGNOSIS FORDTC13 ~
Engine Coolant Temperature Sensor(ECTS)
(Cont'd)
DIAGNOSTIC PROCEDURE

Engine
coolant temperature
sensor harness connector

~/

~Io
ten

~Io

~

Disconnectandreconnect harnesscon-
nectors inthe circuits. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.
INSPECTION END

EC-111

TROUBLEDIAGNOSIS FORDTC13 @KJ
Engine Coolant Temperature Sensor(ECTS)
, '(Cont'd)
COMPONENT INSPECTION
Engine coolant temperature sensor

Check resistance asshown inthe figure.

SEF152P Temperature
°C
(OF)

20 (68)
50 (122)
90 (194) Resistance
kQ
2.1 -2.9
0.68 -1.00
0.236 -0.260

If
NG, replace enginecoolant temperature sensor.

EC-112

TROUBLEDIAGNOSIS FORDTC21

Malfunction isdetected when...
Diagnostic
Trouble
Code No.
Ignition
coil
&
power
transistor harnessconnectors

AEC832 Ignition
Signal
COMPONENT DESCRIPTION
Ignition coil
&
power transistor (Builtintodistributor)

The ignition coilisbuilt intodistributor. 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.

Check Items
(Possible Cause)

•

21
•
The ignition signalinthe primary circuitisnot
entered toECM during engine cranking orrunning. •
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-94.

(F.i\ 1)Turn ignition switch"ON".
~ 2)Select "DATA MONITOR" modewithCONSULT.
3) Start engine.

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

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

EC-113