1995 NISSAN ALMERA N15 relay

SEF511PA
•

No

Yes
Continuity
Conditions
12V direct current supplybetween
terminals
CD
and
@

No current supply

If NG, replace relay.

=

TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cont'd)
COMPONENT INSPECTION
Cooling fanrelay (M/Tmodels)
Check continuity betweenterminals
@
and
CID.

MIT
models
Coolingfanrelays-1, -2and -3(A/T models)
Check continuity betweenterminals
@
and
CID,
@and
(j).

AlT
models

Conditions
12V direct current supplybetween
terminals
CD
and
@

No current supply

If NG, replace relay.
Continuity
YesNo

SEC202BA

Terminals
Speed
(Ee)
(8)

Low
CD
@

(A/T
models)
Cooling fan High

CD,@
@,@

motor
(A/T

models)
High
CD@

(M/T models)

Cooling fanmotor should operate.
If NG, replace coolingfanmotor.
Cooling
fanmotors-1 and-2
1. Disconnect coolingfanmotor harness connectors.
2. Supply cooling fanmotor terminals withbattery voltage and
check operation.
AEC715
Cooling
fanmotor
harness connector
For MIT models
For
AIT Models
AEC,81EC-353

relay-2ENGINE
ANDEMISSION CONTROLOVERALLSYSTEM
Component PartsLocation
Engine coolant
temperature sensor
Glowplugs
•

EC-383 SEF159R

ENGINEANDEMISSION CONTROL OVERALLSYSTEM
System Chart

Ignition key
Engine coolant temperature
sensor Quick-glow
system
Partial loadadvance (PLA)
control Glow
relay
&
glow lamp
Solenoid timer
Engine speedsensor
Air conditioner switch
Battery voltage
Vehicle speedsensor
ECM

(Engine
control module) Coolingfancontrol
Air conditioner cutcontrol

EC-386
Cooling
fanrelay
Air conditioner relays

ECMINSPECTION TABLE TROUBLE
DIAGNOSES ~
ECM Terminals andReference Values(Coni'd)

-Data arereference values.
TER-
MINAL ITEM CONDITION -DATA
NO.
IEngineisrunning.1
L Both
AIC
switch andblower fanswitch areApproximately
OV
8 Air
conditioner relay "ON".
IEngine isrunning.1
BATTERYVOLTAGE
LAIC switchis"OFF". (11
-14V)
IEngine isrunning.1
BATTERY VOLTAGE
Cooling fanrelay (Low L
Cooling fanisnot operating. (11-14V)

9
speed) IEngineisrunning
I

L
Cooling fanisoperating. 1V
IEngine isrunning.1
BATTERYVOLTAGE
Cooling fanrelay (High
t

Cooling fanisnot operating.
(11-14V)
10 Cooling
fanisoperating atlow speed.
speed) IEngineisrunning.1

L
Cooling fanisoperating athigh speed. 1V
0- 5.0V
15 Engine
coolant temperature
IEngineisrunning.1 Output
voltage varieswith
sensor enginecoolant temperature.
25 jlgnitionswitch"ON"I BATTERY
VOLTAGE
37 Power
supply forECM
(11-14V)
jlgnition switch"ON"I
ApproximatelyOV
28 Startsignal
llgnitionswitch"START"I SA
TTERY VOLTAGE
(11 -14V)
Ilgnition keyisnot inserted.1
OV
BATTERY VOLTAGE (11-
30 Key-in
switch
14V)[for3seconds at
Ilgnition keyisinserted.1
enginecoolant temperature

-
ofapprox. 60°C(140°F) or
less)
IEngine isrunning.1

L
Both airconditioner switchandblower fanApproximately
OV
31 Airconditioner switch switch
are"ON".
IEngine isrunning.1
BATTERYVOLTAGE

L
Airconditioner switchis"OFF". (11
-14V)
38 Power
supply Ilgnition
switch"OFF"I BATTERY
VOLTAGE
(11 -14V)
106 Glowrelay
Referto"Quick-glow System".

EC-388

TROUBLEDIAGNOSES
Quick-glow System
SYSTEM DESCRIPTION

Ignition key
Engine coolant temperature sensorKey-in
switch andkeyposition
Engine coolant temperature
ECM

(Engine
control
module) Glow
relay
Glow lamp Glow
plugs
Ignition START[~

~

switch

~~[ I
11
I

1iI

Key

~

switch OUT
-II-
T,

I
!

I
I-l

Key ONe
n

Hn
JTl-

.1"l....!:.1L-

~

timer
OFF
Ir1
To
I

UL
HTo
HT'o
Lamp ON
[
..Lfl

o~~
I
I-.J
TL
I

~
I

I-l
TL

I
I
I
I
I

HTL
I-l

T'L
Relay OFF
[j
I_
L-
r--L

.f"l.-.JL

~

T.

"'
II

I

II
~
1r;,1

I II I
I,

Glow plug
temperature
Normaloperation
Operationafter
key timer isOFF Leaving
keyin
ON position Repeating
keyIN
and OUT Repeating
keyON
and OFF
TL
=
T,-T,
when T,-0.5 >T,

TL
= T,

when T,-0.5 ~T,
;a;
To
TL

=.
T,

when To
<
T, T'o
~80% ofTo
when T.
5':
3sec.
T',

=.
T,

T',
=.
T,

SEC550B

When theignition keyisinserted intothekey
cylinder, theengine control module turnsonthe
relay andthe"high-level" electriccurrentflows
through theglow plugs andheats themup
quickly. Whentheignition switchisturned on,the
control module turnsonthe indicator. AfterT
1

seconds havepassed fromkeyin,the control
module turnsoffthe indicator. While
cranking, therelay remains on.The relay
automatically turnsoffafter T
4
seconds have
passed fromtheengine start.

Engine coolant temperature sensor
Second Enginecoolant tempera-' Remarks
ture 'C('F) Resistance
(kQ)
To
3.1
-3.9

- -

5.0 -7.0 -25(-13)
19.7

T,
1.8
-3.2
20(68)
2.5
0.8 -2.2 60(140)
0.6
17.0 -23.0
Lowerthan
60(140)

Morethan
0.6

T
3

40-6.0

Higherthan
60(140)

Lessthan
0.6
255 -345
Lowerthan
60(140)

Morethan
0.6

Whenalternator is

T
4

working
Less than
10

Higherthan
60(140)

Lessthan
0.6
15 -25

Lowerthan
60(140)

Morethan
0.6

Whenalternator isnot

(T
4)

working

3 -7

Higherthan
60(140)

Lessthan
0.6

T
5
0.1-0.9

- -

EC-390

TROUBLEDIAGNOSES
Quick-glow System(Cont'd)
~
ill]

SEF941P

Ii]

~i5
Glow

Eill~
plug

0

@]Q]

2

[ill
~SEF942P INSPECTION
START
Check fuellevel, fuelsupplying system,
~Correct.
starter motor,etc.
OK

m
Check thatallglow plugconnecting
~Installproperly.
plate nutsareinstalled properly.
OK
CHECK OVERALL FUNCTION. OK
CHECK COMPONENT
Check entirequick-glow system.(Refer
---..

(Glowplug).
to "System Operation Check"onnext See
page EC-397.
page.)
NG
CHECK POWER SUPPLY ANDGROUND NG
Repair harness orcon-
CIRCUIT.
---..

nector.
(Refer to"Power Supplyandground
circuit forECM", EC-396).
OK

(!]

CHECK VOLTAGE BETWEEN GLOW NG
Check thefollowing.
RELA YAND GROUND.
---..

•7.5A fuse
1) Check voltage between terminals •
75A fusible link
G), @and ground withtester. •Harness continuity
Voltage: Batteryvoltage between
glowrelay
OK and
fuse
If NG, repair harness or
connectors.

[!1
CHECK OUTPUT SIGNALCIRCUIT. NG
Repair harness orcon-
1) Check harness continuity between
---+

nectors.
ECM terminal
@
andterminal @.
Continuity shouldexist.
OK

Ii]

CHECK HARNESS CONTINUITY NG
Repair harness orcon-
BETWEEN GLOWRELAY ANDGLOW
---+

nectors.
PLUG. 1) Disconnect ECMharness connector.
2) Disconnect glowrelay.
3) Check harness continuity between
glow relay terminal
@
and glow
plug.
Continuity shouldexist.
~OK
SEF940P
SEF939P

-"-.....
'y;-----...

Connecting platenut:J

~1.0 •1.5
N.mr-

"(0.1 •0.15 kg-m,- ""'-

8.7 -13.0 in-Ib)

~
""
.
'------

~
~
ECM
E1
CONNECTOR
II

106

II

(!]

~io

EC-394

TROUBLEDIAGNOSES
Quick-glow System(Cont'd)

@

CHECK COMPONENTS NG
(Glow relay, Glowplug,Engine coolant
temperature sensor,Key-inswitch, Igni-
tion switch).
Refer to"Component Inspection"(EC-

397).
OK

Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage or
the connection ofECM harness connec-
tor. Reconnect ECMharness connector
and retest. Replace
malfunctioning
component(s).

•

BATIERY [

Voltage

OV

Ignition

key
START
[

ON

IN [

OUT
,
,
,

I
,

JL
SEC5558SYSTEM
OPERATION CHECK

Set voltmeter betweenglowplugandengine body.
1. Key-in glowsystem
• Read voltage whenignition keyisinserted intoignition
switch.
Voltage: Battery voltage forabout 3seconds
Ignition

key

BATIERY [

Voltage

OV
SEC5568
2.
Quick-glow (Pre-glow)system
1) Turn ignition switch"ON"3or more seconds afterkey-in.
2) Read voltage.

Voltage: Battery voltage forabout 20*seconds

*
Coolant temperature islower than60°C(140°F).
* Repeating ignitionkey"ON" and"OFF" may
change thetime.
EC-395

TROUBLEDIAGNOSES ~
Quick-glow System(Cont'd)

• If
NG.
check component partsandtheir related harness
according tothe following chart.

Parts which should bechecked
Terminal Fuse Glowin-
No. Battery IFusible Glow
Key-in Ignition
dicatorHarness
link relay
switch switch
bulb

@
XX
X

@
X
X X X

@
XX
X X

@,@
XX XX

@
XX X
X X

@
X
X XX

COMPONENT INSPECTION
Glow relay

1. Check relayforcoil continuity.

Continuity shouldexist.

2. Check relayforproper operation.

Coil voltage Continuity
Contactpoint

OV
NoOFF

12V
Yes ON
•

Ohmmeter SEC5648
SEF630K Glow
plug

1. Remove glowplugconnecting plate.
2. Check eachglow plugforcontinuity.

Continuity shouldexist:
Approximately 0.650

• IfNG, replace glowplug.

EC-397