1995 NISSAN ALMERA N15 Service Manual

Replaceknocksensor.
NG
NG
Check thefollowing.
• Harness connectors

@,@

If NG, repair harness or
connectors.

r

OK
CHECK
SUB.HARNESS CIRCUIT.
1. Disconnect knocksensor harness
connector.
2. Check harness continuity between
knock sensor harness connector ter-
minal @and knock sensor sub-har-
ness connector terminal
@.

Continuity shouldexist.
If OK, check harness forshort.
CHECK COMPONENT
(Knock sensor).
Refer to"COMPONENT INSPECTION"
on next page.
Loosen
andretighten engineground
screws.

Fa
CHECK INPUTSIGNAL CIRCUIT. NG
Repair harness orcon-
1. Turn ignition switch"OFF".
--.

nectors.
2. Disconnect ECMharness connector
and knock sensor sub-harness con-
nector.
3. Check harness continuity between
terminal @and ECM terminal
@
or

@.

Continuity shouldexist.
If OK, check harness forshort.
TROUBLE
DIAGNOSIS FORDTC34
Knock Sensor (KS)(Conl'd)
DIAGNOSTIC PROCEDURE
For Europe andIsrael, andGA15DE.L..l
en~ine m\~~:e?, Is
Eng~eground
@'~@)
1 _

- \.Y
INSPECTIONSTART

J--

Fa
~i5

II
ECM
]9'CONNECTORII

27 54

,~\
C-/

Power steerin9\'
fluid reservoir /'\ /-:

.~~ :,c"",

OK

@:
ForAustralia

@:
Except forAustralia

SEF144RDisconnect
andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage or
the connection ofECM harness connec-
tor. Reconnect ECMharness connector
and retest.
INSPECTION END
SEF776Q EC.122

TROUBLEDIAGNOSIS FOROTC34

Knock Sensor (KS)(ConI' d)

COMPONENT INSPECTION

Knock sensor

• Use anohmmeter whichcanmeasure morethan10MQ.
1. Disconnect knocksensor harness connector.
2. Check resistance betweenterminal
@
and ground.
Resistance: 500-620 kQ[at25°C (77°F)]

CAUTION:

Discard anyknock sensor whichhasbeen dropped orunder-
gone shocks; useanew one.

AEC719
EC-123
•

TROUBLEDIAGNOSIS FOROTC41
Intake AirTemperature Sensor(IATS)

The intake airtemperature sensormounted tothe aircleaner
housing, detectsintakeairtemperature andtransmits asignal
to the ECM.
The temperature sensingunituses athermistor whichissen-
sitive tothe change intemperature. Electricalresistance ofthe
thermistor decreases inresponse tothe temperature rise.
This sensor isnot directly usedtocontrol theengine system. It
is used onlyforthe on-board diagnosis.

Diagnostic
Trouble Code

No.
41
Malfunction
isdetected when...
a) An excessively loworhigh voltage fromthesen-
sor isentered toECM.
b) Voltage senttoECM isnot practical whencom-
pared withtheengine coolant temperature sensor
signal. Check
Items
(Possible Cause)
• Harness orconnectors
(The sensor circuitisopen orshorted.)
• Intake airtemperature sensor.
*
MONITOR
*
NO FAIL

COOLAN TEMP/S 30°C

RECORD
I

SEF002P

CONNECT ~

II
ECM
a
CONNECTOR
II
I) ~

51
SEF006PDIAGNOSTIC
TROUBLECODECONFIRMATION
PROCEDURE
For themalfunction a)and b)

fF.I\
1)Wait untilengine coolant temperature isless than 90°C
~ (194°F).
(a) Turn ignition switch"ON".
(b) Select "DATA MONITOR" modewithCONSULT.
(c) Check theengine coolant temperature.
(d) Ifthe engine coolant temperature isnot less than
90°C (194°F), turnignition switch"OFF"andcool
down engine.
2) Turn ignition switch"ON".
3) Select "DATA MONITOR" modewithCONSULT.
4) Wait foratleast 5seconds.

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

~ 1)Wait untilengine coolant temperature isless than
~ 90°C(194°F.).
(a) Turn ignition switch"ON".
(b) Check voltage between ECMterminal
@
and
ground.

Voltage: Morethan1.2(V)

(c) Ifthe voltage isnot more than1.2V, turnignition
switch "OFF"andcool down engine.
2) Turn ignition switch"ON"waitforatleast 5seconds.
3) Turn ignition switch"OFF", waitforatleast 3seconds
and then turn"ON".
4) Perform "Diagnostic TestMode II"(Self-diagnostic
results) withECM.

EC-124

GA16DE forAustralia TROUBLE
DIAGNOSIS FOROTC41 ~
Intake AirTemperature Sensor(IATS)(Cont'd)

EC-IATS-01

t
INTAKE
AIR
TEMPERATURE
SENSOR

~

-:Detectable line

for
DTC

-: Non-detectable

line for
DTC
•

~

@
GY
R/Y

~
TA
B

15"0
I

GND
-A
ECM
(ECCSCONTROL
MODULE)

em

101 102
103
107 108
109
113 114
115 104
105 106
110 111112
116
117
118

EC-125 HEC073

Checkthefollowing.
• Harness continuity
between ECMand
intake airtemperature
sensor
If NG, repair harness or
connectors.

NG

INSPECTION
START

CHECK POWER SUPPLY.

1. Turn ignition switch"OFF".
2. Disconnect intakeairtemperature
sensor harness connector.
3. Turn ignition switch"ON".
4. Check voltage between terminal @
and ground.

Voltage: Approximately SV
TROUBLE
DIAGNOSIS FORDTC41
rnJ

Intake AirTemperature Sensor(IATS)(Cont'd)
DIAGNOSTIC PROCEDURE

--

~
Intake airtemperature
'" '\ sensor harness connector
AEC550

~ DISCONNECT
ciili
10

AEC723

~i5 ~

dID
CHECK
GROUND CIRCUIT.

1. Turn ignition switch"OFF".
2. Check harness continuity between
terminal
G)
and engine ground.

Continuity shouldexist.
OK

CHECK COMPONENT
(Intake airtemperature sensor).
Refer to"COMPONENT INSPECTION"
on next page.
NG
NG
Check
thefollowing.
• Harness continuity
between ECMand
intake airtemperature
sensor
If NG, repair harness or
connectors
Replace intakeairtem-
perature sensor.

OK

Disconnect andreconnect harnesscon-

AEC724
nectorsinthe circuit. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector.
Reconnect ECMharness connector and
retest.
INSPECTION END

EC-126

TROUBLEDIAGNOSIS FORDTC41 @K]
Intake AirTemperature Sensor(IATS)(Cont'd)
COMPONENT INSPECTION

20
19
6
9
4

fl 2

ffi
10

iii
0.8

'w

&
04

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

SEF012PIntake
airtemperature sensor

Check resistance asshown inthe figure.
Intake airtemperature
'c ('F)

20 (68)
50 (122)
EC-127
Resistance
kQ

2.1 -2.9
0.68 -1.0
•

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Throttle Position Sensor

The throttle position sensorresponds tothe accelerator pedal
movement. Thissensor isakind ofpotentiometer whichtrans-
forms thethrottle position intooutput voltage, andemits the
voltage signaltothe ECM. Inaddition, thesensor detects the
opening andclosing speedofthe throttle valveandfeeds the
voltage signaltothe ECM.
Idle position ofthe throttle valveisdetermined
by
the ECM
receiving thesignal fromthethrottle position sensor.Thisone
controls engineoperation suchasfuel cut.

SEF089K

CIl
Supplyvoltage:

r
-i.~h __
~3_
i
45
I
'V ,Appl.' b....
ffi
t~miMI,
No1,,'
31

~_ =r--=-tfr ~
I

l ~
1
N~
I

Throttle position sensor g
-g

'5 ::: 0.5

0-

'5
0 0----- -_.- --------_.

OZ 0 90

Throttle valveopening angle(deg_)
EC-128 SEF520Q

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS~
Throttle Position Sensor(Cont'd)

EC-TPS-01

f
1

I I

I

t
I
JJ

I

I
I

I

I

I

I
THROTTLE
POSITION
SENSOR

@
@:

ForEurope andIsrae 1
_: Detectable line
for DTC
-: Non-detectable
line forDTC

•

ECM (ECCS
CONTROL
MODULE)

em

B

12"g
I

GND
-A
JOINT
CONNECTOR-6

@

I:
.-.----...f~:==:P:JI--- ..

P!L YB

~~um

AVCC TVOGND
-A

t

JXL@

BR
_
.. ~@

IIIillITIIIIl
GY

HEC035
EC-129