1995 NISSAN ALMERA N15 Service Manual

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

Ii)
For Europe andIsrael, and
GA 15DE engine

~i5
cill1D

GA 16DE engine models exceptfor
Europe andIsrael

~15

1='
=E=CM==:!iH CONNECTOR
II

17 48

@ :Except forAustralia

@ :
For Australia SEF140R
[!J
For Europe andIsrael, and
GA 15DE engine models

~i5 ~i5

II
ECM
Ef
CONNECTOR
II
c:illli:>

16

@a

GA 16DE engine models exceptfor
Europe andIsrael

~io
~i5

II
ECM El'CONNECTORII
ULffhD

16 47

@:
Except forAustralia
47 :For Australia SEF141R
EC-106

•

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

TROUBLEDIAGNOSIS FORDTC13 ~
Engine Coolant Temperature Sensor(ECTS)
(Cont'd)

EC-ECTS-01

t
ENGINE
COOLANT
TEMPERATURE
SENSOR

m

@:ForEurope and
Israel

@:
Except@

*1",@ GY@BR!Y

,

-: Detectable line
for DTC
-: Non-detectable
line forDTC
•

lZlfll)

GY
B

~
GND
-A
B
~
GND -A ECM
(ECCSCONTROL
MODULE)

em

HEC032
EC-109

GA16DE forAustralia TROUBLE
DIAGNOSIS FORDTC13
[]K]

Engine Coolant Temperature Sensor(ECTS)
(Cont'd)

EC-ECTS-01

~ENGINE COOLANT

TEMPERATURE

SENSOR

(ffl)

U:iJ
lbi=ll

BR/Y B

t
-:
-:
Detectable
line
for DTC
Non-detectable line forDTC

~
@
GY
BR/Y

IT5TI
TW
B

115"0
I

GND -A
ECM
(ECCS
CONTROL
MODULE)

em

101 102103
107 108109
113 114115 104
105 106
110 HI H2
116 117118

EC-110 HEC065

•

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