NISSAN ALMERA N15 1995 Service Manual

TROUBLEDIAGNOSIS FORDTC12
Mass AirFlow Sensor (MAFS) (Cont'd)
GA 16DE engine models exceptforEurope andIsrael

EC-MAFS-02

Refer toEL-POWER.

(
"

I'
....
1

1 1
1 1
1 1
1 1
1

t
~!

1
1

I
I
I
I

JOINT

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1

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1
CONNECTOR

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em

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I

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....

.....--u1

~

,

1----
•

II

8 8 8

t...J
1

ffi
ill

-:
Detectable line
for DTC
-: Non-detectable
line forDTC
ECM (ECCS
CONTROL
MODULE)

em

MASS
AIR
FLOW SENSOR

rn>

I

W!R

rn
lbiJ~
OR W

OR W

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QA+ QA-

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QHD

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ECCS

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RELAY

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(IT)

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SSOFF V8V8

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CEID

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Refer
tolast page
(Foldout page).

HEC031
EC-103

TROUBLEDIAGNOSIS FOROTC12
Mass AirFlow Sensor (MAFS) (Conl'd)
GA16DE forAustralia

EC-MAFS-01

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

11

B 8 B

t...l
1

~ ~

ECM
(ECCSCONTROL
MODULE)

em

,

I.

JOINT

CONNECTOR-6

@

--.~=-
-=~I--""

OR W

II}; 1
14-81

QA+ QA-

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r
,
W/R

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3 MASS

AIR

FLOW

SENSOR

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OR W

Refer
toEL-POWER.
W/L
I

W
/L
tETt'i7\
r=b~

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11iJ,@
=r@
W/L

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ECCS
~ RELAY

~U:jJJ@
WIG W/R

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SSOFF VBVB

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@

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GY
Refer
tolast page

(Foldout page).

101 102 103
107 108109
113 114 115 104
105 106
110
111
112
116
117
118

HEC064
EC-104

•

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

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