1995 NISSAN ALMERA N15 Service Manual

TROUBLEDIAGNOSIS -General Description
[![]

ECM Terminals andReference Value(Cont'd)
ECM inspection table

*Dataarereference
values.

TERMINAL WIRE
ITEM
NO. COLOR CONDITION
'DATA
[Engine isrunninQ]
0.2-0.3V
L Idle speed
1
W/B
Ignitionsignal
IEngineisrunning.1
L Engine speedis2,000 rpm. Approximately
0.7V
2 LlOR Tachometer IEngine
isrunning]
Approximately0.9V
L Idle speed
3 GY/R
Ignitioncheck !Engine
isrunning.1
Approximately13V
L Idle speed
IEngine isrunning.1

I

Ilgnition switch"OFF"I
0-1V
ECCS relay(Self-shut- L
For afew seconds afterturning ignition
4
WIG

switch"OFF"
off)
Ilgnitionswitch"OFF"I
BATTERYVOLTAGE
L Afew seconds afterturning ignition switch
(11-14V)
"OFF" andthereafter

6
B/W

ECCSground IEngine
isrunning.1
Engineground
L Idle speed
7
G/B

Approximately13.5V
14
G/W

Datalinkconnector forIEngine
isrunning.1
ApproximatelyOV
15 GY/L CONSULT
LIdle speed Approximately
2.5V
23
G/R

ApproximatelyOV
IEngine isrunning.1
BATTERYVOLTAGE
Cooling fanrelay (Low L
Cooling fanisnot operating. (11
-14V)
9 LG/R
speed) IEngineisrunning.1
L Cooling fanisoperating. Approximately
OV
IEngine isrunning.1
BATTERYVOLTAGE
Cooling fanrelay
t

Cooling fanisnot operating.
(11-14V)
10 LG Cooling
fanisoperating atlow speed.
(High speed)
IEngineisrunning.1
L Cooling fanisoperating athigh speed. Approximately
OV
IEngine isrunning.1
L Both
A/C
switch andblower fanswitch areApproximately
OV
11 Y Airconditioner relay "ON".
IEngine isrunning.1
BATTERYVOLTAGE
LAIC switchis"OFF". (11
-14V)
13
B/W
ECCSground IEngine
isrunning.1
Engineground
L Idle speed

EC-282

TROUBLEDIAGNOSIS -General Description
[ill

ECM Terminals andReference Value(Conl'd)

*Data arereference values.
TERMINAL WIRE
NO. COLOR ITEM
CONDITION *DATA
IEngine isrunning.1 (Warm-up condition)
1.3-1.7V

L
Idle speed
16 OR Mass
airflow sensor
IEngineisrunning.1 (Warm-up condition)
1.7-2.1V

L
Engine speedis2,000 rpm.
17 W Mass
airflow sensor IEngine
isrunning.!
ApproximatelyOV
ground
L
Idle speed
0-5.0V
18 BRIY Engine
coolant tem-
IEngineisrunning.! Output
voltage varies
perature sensor with
engine coolant
temperature.
19 W
Heatedoxygen sensor IEngine
isrunning.1
0-Approximately 1.OV

L
After warming upsufficiently
Ilgnition switch"ON"I(Warm-up condition)
0.35-0.65V
Throttle position sen-
L

Accelerator pedalreleased
20 Y
sor Ilgnitionswitch"ON"I

L
Approximately
4V
Accelerator pedalfullydepressed
21 B Sensor'sground IEngine
isrunning.1
ApproximatelyOV

L
Idle speed
22 Camshaft
position
30 L
sensor
(Reference IEngineisrunning.1 0.1
-O.4V
signal)
jlgnitionswitch"ON"!
Approximately1.5V
24 ORIL Malfunction
indicator
lamp IEngineisrunning.1 BATTERY
VOLTAGE
(11 -14V)
27 W Knock
sensor IEngine
isrunning.1
Approximately2.5V

L
Idle speed
29 B Sensor's
ground IEngine
isrunning.1
ApproximatelyOV

L
Idle speed
31 Camshaft
position
40
S/W

sensor
(Position sig-
IEngineisrunning.! 2.0
-3.0V
nal)
Ilgnitionswitch"ON"I
32 PUIR
Vehiclespeedsensor
t

Eng;ne "opped andge., po,;!;on ;,"Neo-

Variesfrom0to 5V
tral position".
While rotating drivewheel byhand
Ilgnition switch"ON"!
ApproximatelyOV
34
BIY
Start
signal
Ilgnitionswitch"START"I SA
TTERY VOLTAGE
(11 -14V)

EC-283
•

TROUBLEDIAGNOSIS -General Description
[]:KJ

ECM Terminals andReference Value(Cont'd)
*Data arereference values.
TERMINAL WIRE
ITEM CONDITION *
DATA
NO. COLOR
/Ignitionswitch"ON'"

t
"N" or"P" position
(A/T)
OV
35
G/OR
Neutral
position
Neutralposition
(M/T)

switch/lnhibitor switch
I'gnitionswitch"ON"I
BATTERYVOLTAGE

L
Except theabove gearposition (11
-14V)
I'gnition switch"OFF"I
OV
36 B/R Ignition
switch
Ilgnitionswitch"ON"I BATTERY
VOLTAGE
(11 -14V)
37 P/L Throttle
position sen-
pgnition switch"ON"I
Approximately5V
sor power supply
38 Powersupply forECM
Ilgnition switch"ON"I BATTERY
VOLTAGE
47 W/R
(11-14V)
39 B ECCSground IEngine
isrunning.1
Engineground

L
Idle speed
IEngine isrunning.!

L
Both airconditioner switchandblower fanApproximately
OV
41 G Air
conditioner switch switch
are"ON".
IEngine isrunning.1
BATTERYVOLTAGE

L
Airconditioner switchis"OFF". (11
-14V)
IEngine isrunning.1
OV
Power steering oil
L

Steering wheelisbeing turned.
43 PUlW
pressureswitch
IEngineisrunning.1

L
Steering wheelisnot being turned. 7
-9V
46 W/L Power
supply
I'gnitionswitch
"0FFj
BATTERY
VOLTAGE
(Back-up) (11-14V)
48 B ECCSground IEngine
isrunning.1
Engineground

L
Idle speed
109 W/L Currentreturn
Ilgnitionswitch"OFF"I BATTERY
VOLTAGE
(11 -14V)
101 RIB InjectorNo.1
103
G/B
InjectorNo.3
BATTERYVOLTAGE
110 Y/B InjectorNO.2 IEngine
isrunning.1
(11-14V)
112 LIB InjectorNO.4
EC-284

TROUBLEDIAGNOSIS -General Description
[]K]

ECM Terminals andReference Value(Cont'd)

'Data arereference values.
TERMINAL WIRE
ITEM CONDITION
'DATA
NO. COLOR
Ilgnitionswitch"ON"I

L
For 5seconds afterturning ignition switch
"ON" Approximately
OV
104 B/P Fuelpump relay !Engine
isrunning.1
Ilgnition switch"ON"I
BATTERY VOLTAGE

L
5seconds afterturning ignitionswitch
(11-14V)
"ON" andthereafter
IEngine isrunning.1
0.6-0.8V
EGR valve
&
EVAP

.L
Engine speedis4,000 rpm.
105 P canisterpurgecontrol
solenoid valve IEngine
isrunning.1
BATTERYVOLTAGE

L
Idle speed (11
-14V)
107 IEngine
isrunning.j
B/Y ECCSground

L
Engine
ground
108 Idlespeed
!Engine isrunning.1
Approximately0.2V

L
Engine speedisbelow 3,200rpm.
Heated oxygen sensor
111 OR
heater IEngineisrunning.1
BATTERY VOLTAGE

L
Engine speedisabove 3,200rpm. (11
-14V)
IEngine isrunning.\
11-14V

L
Idle speed
113 SB IACV-AAC
valve lEngine
isrunning.1

~ Sle«;ng wheel;,be;ng I"med

2-11V
Air conditioner isoperating.
Rear window defogger switchis"ON".
Lighting switchis"ON".
!Engine isrunning.1
ApproximatelyOV
Torque converter
L

Idle speed
115 P/B clutch
solenoid valve
IEngineisrunning.1 (Warm-up condition)

(A/T
models)

L
Vehicle speedis60 km/h (37MPH) or BA
TTERY VOLTAGE
(11 -14V)
more in"D" position
116 BIY ECCS
ground IEngine
isrunning.1
Engineground

L
Idle speed

EC-285
•

TROUBLEDIAGNOSIS FORPOWER SUPPLV
Main Power Supply andGround Circuit

EC-MAIN-01

GNO GNO GNDGND GNDGNDGND

-C -C -E-E -E-I -I

13.91 I~SI 11~71
1I1~1 11~61~~

B B B/YB/Y B/YB/W B/W

LI II II I

, I--i
'-e-e-=e----l

B B BB/Y

.~ L, -:

+
* -:
CF13)
ill

Refer
toEL-POWER.

ECM
(ECCS
CONTROL

MODULE)

em
Detectable line
for DTC
Non-detectable line forDTC
Refer
toEL-POWER.
ST IGNITION
SWITCH

~
30A

OJ

~
B/R

I

B/R

d:::.(llii)

I~I(]ID

B/R

ICDI@

=r@

B/R

I

B/R

~
IGN
SW

7.5A

[ill

W!L

d:::.
(E10n

I~I (MS)

W!L

*@

~@

W!L

I

e----'--,
W/LW/L

IT
]1
ECCS

~ RELAY

Ibi=Jl Ibi=Jl
@

WIG W/R

I
+--~

WIG W/R W/R

m
';sl \171

SSOFF VBVB

'--I

W/L W/L

14'61
h1~1

BATT CRTN

~II
Illij
@

3456 W
Acrn

T
L
~
(E114)

[mJID
W
Refer
tolast page
(Foldout page).

em
L

HEC002
EC-286

TROUBLEDIAGNOSIS FORPOWER SUPPLY
[]K]

Main Power Supply andGround Circuit(Cont'd)

II Il

~i)
ECM
Er
CONNECTOR
II

36

~i)
ECM
EfCONNECTORI!

~$

Lwt
INSPECTION
START
Start engine.

Is engine running?

Yes

MEC746B
No

--+
CHECK
POWER SUP-
PL V-I.
1. Turn ignition switch

"ON".

2. Check voltage between
ECM terminal @and
ground withCONSULT
or tester.

Voltage: Batteryvolt-
age

If NG, check thefollow-
ing .
• Harness connectors

@,@

• Harness connectors

OO,@l)

• Harness foropen or
short between ECM
and ignition switch
If NG, repair harness or
connectors.
•

MEC714B
~OK
Go to
III
"CHECK
GROUND CIRCUIT" on
next page.
Check thefollowing.
• Harness connectors

@,@

• Harness connectors

OO,@l)

• 7.5A fuse
• Harness foropen or
short between ECM
and battery
If NG, repair harness or
connectors.
Case-1: Batteryvoltage
does notexist.
Case-2: Batteryvoltage
exists formore than
a few seconds.
OK

--+
Goto
III
"CHECK
GROUND CIRCUIT" on
next page.
NG

--+

CHECK POWER SUPPLV-III.
1. Turn ignition switch"ON"andthen

"OFF".

2. Check voltage between ECMterminals

@,
@
and ground withCONSULT
or tester.

Voltage:
After turning ignition switch"OFF",
battery voltage willexist forafew
seconds, thendrop toapproximately

QV.

CHECK
POWER SUPPLV.II.
1. Stop engine.
2. Check voltage between ECMterminals

@l ,
(ill)
andground withCONSULT
or tester.

Voltage: Batteryvoltage

MEC747BI OK
MEC748B

~
CONNECTOR
II

38' 47

"--.--'

ECM

Il

@
NG
Case-2
Case-1 Go
to
[it
"CHECK ECCS
RELA Y"onnext page.
EC-287

TROUBLEDIAGNOSIS FORPOWER SUPPLY
[gJ

Main Power Supply andGround Circuit(Cont'd)

@

~IV ~i5

Ie
ECM E!'CONNECTORI! +351

38.47

~
SEF460Q

ts
3 2
1

5
I!]

CHECK HARNESS CONTINUITY
BETWEEN ECCSRELAY ANDECM

1. Disconnect ECMharness connector.
2. Disconnect ECCSrelayharness con-
nector.
3. Check harness continuity between
ECM terminals
@,@
and terminal

@.
Continuity shouldexist.

If OK, check harness forshort.

OK
CHECK VOLTAGE BETWEEN ECCS
RELAY ANDGROUND.

Check voltage between terminals
(!),

@
and ground withCONSULT or
tester.
Voltage: Batteryvoltage NG
NG
Repair
harness orcon-
nectors.
Check thefollowing.
• Harness connectors

@,@

• Harness connectors

@,

• Harness foropen or
short between ECCS
relay andbattery
If NG, repair harness or
connectors.
Repair harness orcon-
nectors.
Replace ECCSrelay.

NG

NG
OK
OK

[!1

CHECK ECCSRELAY.

1. Apply 12Vdirect current between
relay terminals
(!)
and
@.

2. Check continuity betweenrelayter-
minals
@
and
@.

12V
«(!) .
@) applied:
Continuity exists.
No voltage applied:
No continuity

Ii

CHECK OUTPUT SIGNALCIRCUIT.

Check harness continuity betweenECM
terminal
@
and terminal
@.
Continuity shouldexist.

If OK, check harness forshort.

AEC684
AEC492

~i5

•

JO[CONNECTOR

II

4

ECM

Ii

OK

III

CHECK GROUND CIRCUIT.

1. Turn ignition switch"OFF".
2. Loosen andretighten engineground
screws.
3. Disconnect ECMharness connector.
4. Check harness continulty between
ECM terminals
@,
@,@,
@,

@,
COO,GID
andengine ground.

Continuity shouldexist. .

If OK, check harness forshort.
NG

Repair harness orcon-
nectors.

SEF090M OK

III

~15@a

II
ECM ~CONNECTOR
II

6'13'39048'107'108'116

.
.

LEn
Check
ECMpinterminals fordamage
and check theconnection ofECM har-
ness connector.
INSPECTION END

SEF461Q EC-288

TROUBLEDIAGNOSIS FOROTC11

Rotor plate

SEF6138

180
0
signal slitfor NO.1 cylinder

\\\\""I"~'11111
1
0
signal slit

\\\\\ d'"
/11;
:£

';\'0\
I//..;:

#'
/%

$ ~
180
0
signal slit

f
0
%

o
Camshaft
PositionSensor(CMPS)

The camshaft positionsensorisabasic component ofthe
ECCS. Itmonitors enginespeedandpiston position. These
input signals tothe ECM areused tocontrol fuelinjection, igni-
tion timing andother functions.
The camshaft positionsensorhasarotor plate andawave-
forming circuit.Therotor plate has360slits fora
1"
(POS) sig-
nal and 4slits fora180
0
(REF) signal. Thewave-forming circuit
consists ofLight Emitting Diodes(LED)andphoto diodes.
The rotor plate ispositioned betweentheLED andthephoto
diode. TheLED transmits lighttothe photo diode. Asthe rotor
plate turns, theslits cutthe light togenerate rough-shaped •
pulses. Thesepulses areconverted intoon-off signals bythe
wave-forming circuitandsent tothe ECM.

Rotor plate

SEF8638

Diagnostic
Trouble Code

No.

11
Malfunction
isdetected when....
• Either 1
0
or 180
0
signal isnot sent toECM forthe
first fewseconds duringengine cranking.
• Either
r
or 180" signal isnot sent toECM often
enough whiletheengine speedishigher thanthe
specified enginespeed.
~
• The relation between rand180
0
signal isnot in
the normal rangeduring thespecified engine
speed. Check
Items
(Possible Cause)
• Harness orconnectors
(The camshaft positionsensorcircuitisopen or
shorted.)
• Camshaft positionsensor
• Starter motor(Refer toEL section.)
• Starting systemcircuit(RefertoEL section.)
• Dead (Weak) battery

3)

@

1)
2)
DIAGNOSTIC
TROUBLECODECONFIRMATION
PROCEDURE

rif\
1)Turn ignition switch"ON"andselect "DATA
~ MONITOR" modewithCONSULT.
2) Start engine andrunitfor atleast 2seconds atidle
speed.

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

Start engine andrunitfor atleast 2seconds atidle
speed.
Turn ignition switch"OFF", waitatleast 7seconds
and then turn"ON".
Perform "Diagnostic TestMode II"(Self-diagnostic
results) withECM.

EC-289