NISSAN ALMERA N15 1995 Service Manual
Page 1081 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
[]K]
Heated Oxygen Sensor(H02S)
EC-H02S-01
IGNITION SWITCH
ON orSTART
10A
[l[J
FUSE
BLOCK
(JIB)
~
Refer
toEL-POWER.
IN:OI
BR!Y
I
BR/Y
,cID,@
=r@
BR/Y
I
BR/Y
m
HEATED
OXYGEN
SENSOR
I4=!J ~
<W>
- OR W
-:
Detectable line
for DTC
-: Non-detectable
line forDTC
OR
urtru
02H
F
4
tl
I
I
I
I
I
JOINT
I
CONNECTOR-6
I
em
W .~.....--~
u=f9l1
In
025 ECM 8B8
(~g~~ROL
,_I
-I
1
MODULE)
-L
cw.
m~
!Il'
I'I~
@
3456 W
~<W>
U@..@)
GY
~em
CDODJDJDJDJD
GY
Refe~
tolast page
(Foldout page).
EC-362
CED
L
HEC020
Page 1082 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Heated Oxygen Sensor(H02S)(Cont'd)
SYSTEM DESCRIPTION
Heated oxygen sensorheatercontrol
ECMHeated
I
Crankshaft positionsensor
I
Engine speed (ECCS
~
oxygen
~
control sensor
module) heater
OPERATION •
--~-
The
ECM performs ON/OFFcontrolofthe heated
oxygen sensorheatercorresponding tothe
engine speed.
Enginespeedrpm
Above 3,200
Below 3,200
Heated
oxygen sensor
heater
OFF
ON
i
Heaterpad
Isolation
bearing Zirconia
i
tube
SEF406H COMPONENT
DESCRIPTION
The heated oxygen sensorisplaced intothefront tube. It
detects theamount ofoxygen inthe exhaust gascompared to
the outside air.The heated oxygen sensorhasaclosed-end
tube made ofceramic zirconia. Thezirconia generates voltage
from approximately 1Vinricher conditions to
av
inleaner con-
ditions. Theheated oxygen sensorsignalissent tothe ECM.
The ECM adjusts theinjection pulseduration toachieve the
ideal air-fuel ratio.Theideal air-fuel ratiooccurs neartherad-
ical change from1Vto
av.
2
1
::>
<D
OJ
~
(5
>
"5
c.
"5
0
:'--
0
-
Rich ---
Ideal
ratio _
Lean
Mixture ratio
SEF288D
EC-363
Page 1083 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Heated Oxygen Sensor(H02S)(Cont'd)
DIAGNOSTIC PROCEDURE
• MIXTURE RATIOTEST.
ACCELERATE TO2000
RPM AND HOLD THEN
TOUCH START.
INSPECTION
START
*
NO FAIL
0
II=]
1800 20002200
ij
NEXT
II
START
J
RECORD \ I/
'~/'
- CHECK-
/
......
/ I\
INSPECTION
END
OK
NG
CHECK
HEATED OXYGEN SENSOR
CIRCUIT.
1. Start engine andwarm itup suffi-
ciently.
rF.i\
2.Perform "MIXTURE RATIO
\J!J
TEST"in"FUNCTION TEST"
mode withCONSULT.
OR
rF.i\
2.Make surethat"M/R FIC
\J!J
MNT"in"DATA MONITOR"
mode indicates "RICH"and
"LEAN" periodically more
than 5times during 10 sec-
onds at2,000 rpm.
OR
~ 2.Stop engine andsetECM
~ Diagnostic TestMode II
(Heated oxygensensormoni-
tor).
3. Restart engineandrunitat
about 2,000rpmforabout 2
minutes underno-load.
4. Keep engine speedat2,000
rpm andmake surethatthe
malfunction indicatorlampon
the instrument panelgoeson
and offmore than5times dur-
ing 10seconds.
SEF815L
I
MEC782B
2000rpm
RICH
CMPSoRPM
(REF)
M/R FICMNT
*.
MONITOR
Repairharness orcon-
nectors.
NG
OK
@
SEF089PA
Malfunction
indicator
lamp
~
Heated oxygen '~~
sensor harness connector \
ij
~I 1-''--\
CHECK
INPUTSIGNAL CIRCUIT.
SEF051PA
1.Turn ignition switch"OFF".
'-------------------' 2.Disconnect heatedoxygen sensor
harness connector andECM harness
connector.
3. Check harness continuity between
ECM terminal
@
and terminal
@.
Continuity shouldexist.
4. Check harness continuity between
ECM terminal
@
(orterminal
@)
and ground.
Continuity shouldnotexist.
if OK, check harness forshort.
II
~i5
ECM
-er
CONNECTOR
II
19
~i5
~
MEC735B EC-364
Page 1084 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Heated Oxygen Sensor(H02S) (Cont'd)
•
Repair harness orcon-
nectors. Go
to"CHECK
COMPONENT".
Check thefollowing.
• Harness connectors
aD,@
• 10A
fuse
• Harness foropen or
short between heated
oxygen sensorand
fuse
If NG, repair harness or
connectors.
OK
NG
NG
OK
CHECK
HEATED OXYGEN SENSOR
HEATER CIRCUIT.
1. Reconnect harnessconnectors.
2. Start engine.
3. Check voltage between ECMterminal
Gill
andground withCONSULT or
tester underthefollowing conditions.
Voltage: Engine speedisbelow 3,200rpm
Approximately OV
Engine speedisabove 3,200rpm
Battery voltage
CHECK POWER SUPPLY.
1. Stop engine.
2. Disconnect heatedoxygen sensor
harness connector.
3. Turn ignition switch"ON".
4. Check voltage between terminal
@
and ground.
Voltage: Batteryvoltage@
CHECK OUTPUT SIGNALCIRCUIT.
1. Turn ignition switch"OFF".
2. Disconnect ECMharness connector.
3. Check harness continuity between
terminal
G)
and ECM terminal
Gill.
Continuity shouldexist.
If
OK, check harness forshort.
SEF646P
MEC784B
~i5
cillID
MEC783B
~i5
ECM
J9"
CONNECTOR
II
111
@J
~i)~ID
II
ECM
J9"
CONNECTOR
II
111
OK
Loosen andretighten engineground
screws.
CHECK COMPONENT
(Heated oxygensensorheater).
Refer to"COMPONENT INSPECTION"
on next page.
OK
Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
NG
Replace heatedoxygen
sensor.
Trouble isnot fixed
Check ECMpinterminals fordamage
and check theconnection ofECM har-
ness connector. ReconnectECMhar-
ness connector andretest.
INSPECTION END
EC-365
Page 1085 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS[][]
Heated Oxygen Sensor(H02S)(Cont'd)
COMPONENT INSPECTION
Heated oxygen sensorheater
Check resistance betweenterminals
CD
and
CID.
Resistance:
3.3•6.30
[at
25°C (77°F)]
If NG, replace theheated oxygen sensor.
AEC745
EC-366
Page 1086 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS~
Torque Converter ClutchSolenoid Valve
EC-LKUP-01
I
Q.61
Y
I
Y
1[~]Im
=r=~
Y
I
Y
r=b
TORQUE
~3 CONVERTER
CLUTCH
SOLENOID
11111 VALVE
=r=@ID
PIS
I
PIS
r=bm
1~1@g)
PIS
L
PIS~ PIS-PIS iJJ-
PIS
l
~(][) @@
PIS
IF1I5n
LKUP -:
Detectable line
for DTC
IGNITION
SWITCH
ON orSTART
10A
[]]
FUSE
SLOCK
(J/S)
<E106)
Refer
toEL-POWER.
-:
Non-detectable
line forDTC
ECM (ECCS
CONTROL
MODULE)
em
•
~~,m
~ SGY
Refer
tolast page
(Foldout page).
EC-367
(IT)
L
HEC023
Page 1087 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS~
Torque Converter ClutchSolenoid Valve(Cont'd)
SYSTEM DESCRIPTION
Throttle position sensor Throttle
valveopening angle
Engine coolant temperature sensorEnginecoolant temperature ECM
(ECCS
control
module) Torque
converter
clutch solenoid
valve
Vehicle speedsensor Vehicle
speed
The
AfT
lock-up iscontrolled bythe ECM through
the torque converter clutchsolenoid valve.When
the ECM detects anyofthe following conditions,
the ECM switches thetorque converter clutch
solenoid valveOFFtoaccomplish lock-upopera-
tion. While thevehicle isinconditions otherthan
below, thetorque converter clutchsolenoid valve
is always settoON, relea'sing thelock-up oper-
ation. •
Throttle position isopen .
• Engine coolant temperature is70°C (158°F) or
more .
• Vehicle speedis58 kmfh (36MPH) ormore.
~i3~
II
ECM
E[CONNECTORII
DIAGNOSTIC
PROCEDURE
INSPECTION START
115
OK
INSPECTION END
CHECK
COMPONENT
(Torque converter clutch
solenoid valve).
Refer to"Electrical Com-
ponents Inspection" in
AT section.
If
NG, replace torque
converter clutchsolenoid
valve.
Check thefollowing.
• Harness connectors
@,<illV
• 10A fuse
• Harness foropen or
short between torque
converter clutchsole-
noid valve andfuse
If NG, repair harness or
connectors.
NG
OK
OK
@
CHECK
CONTROL FUNCTION.
1. Jack updrive wheels.
2. Start engine andwarm itup suffi-
ciently.
3. Shift selector leverto"0" position.
4. Check voltage between ECMterminal
GID
andground underthefollowing
conditions.
Voltage: Accelerator pedalIsdepressed
[Vehicle speedisabove
58 km/h (36MPH).]
Battery voltage
Accelerator pedalisfully
released
Approximately OV
CHECK POWER SUPPLY.
1. Stop engine.
2. Disconnect torqueconverter clutch
solenoid valveharness connector.
3. Turn ignition switch"ON".
4. Check voltage between terminal
@
and ground.
Voltage: Batteryvoltage
-
MEC785B
MEC279BA
Ef
CONNECTOR
II
115
II
ECM
~~
ID
cf8~-H
EC-368
Page 1088 of 1701
TROUBLEDIAGNOSIS FuRNON-DETECTABLE ITEMS
[![]
Torque Converter ClutchSolenoid Valve(Cont'd)
@
~i5
~
~i5
II
ECM
Ef
CONNECTOR
II
115 SEF513Q
~ SEF514Q CHECK
OUTPUT SIGNALCIRCUIT.
1. Turn ignition switch"OFF".
2. Disconnect ECMharness connector.
3. Check harness continuity between
ECM terminal
@
andterminal
G).
Continuity shouldexist.
If OK, check harness forshort.
OK
CHECK COMPONENT
(Torque converter clutchsolenoid
valve).
Refer to"Electrical Components
Inspection" in
AT
section.
OK
Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Trouble isnot fixed
Check ECMpinterminals fordamage
and check theconnection ofECM har-
ness connector. ReconnectECMhar-
ness connector andretest.
INSPECTION END
EC-369 NG
NG
Check
thefollowing.
• Harness connectors
@@,@
• Harness connectors
@D,@
• Harness connectors
@,CID
• Harness foropen or
short between ECM
and torque converter
clutch solenoid valve
If NG, repair harness or
connectors.
Replace torqueconverter
clutch solenoid valve.
•
Page 1089 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
[![J
Malfunction Indicatorlamp(Mil)
&
Data Link
Connector (DlC)forCONSULT
IGNITION SWITCH
ON or START
EC-MIL-01
FUSE
7.5A BLOCK
ITJ
(JIB)
~
Refer
toEL-POWER.
-:Detectable line
for DTC
-: Non-detectable
line forDTC
I
DATA LIN<
CONNECTOR
FOR CONSULT
(fill)
~
S
ECM (ECCS
CONTROL
MODULE)
em
COMBINATION
METER (MALFUNCTION
INDICATOR
LAMP)
@
Y
13'01
U3.211
ORIL
G
1
m
LiJLiJ~LiJ
GIS
GY
IL G/R G/W
I~
It ~~
GIS
GYIL
JOINT
tt
lI~
CONNECTOR-5
~ 1bi=H~
ORIL ~
G/B
GY
IL G/R G/W
I$~
-F~---- -- --- - -
~$~-~$~-~$~-~$I
ORIL
CEID
GIS
GY
IL G/R
G/W
I II II
ORIL G/SGY/L G/R G/W
~ mrr15il~rrtru
LED-R SCISCICHECK SCI
RX TX CL
(In) (Out)
Refertolast page
(Foldout page).
~~
~OR
em
L
HEC024
EC-370
Page 1090 of 1701
By-passpassage (Fueltemperature iscold)
INJECTION
SYSTEM
Fuel return control valve
(Only models forfrigid areas) Fuel
return passage
Injectionnozzle
•
Fuel temperature: Cold
To
fuel tank- Frominjection pump
SEF151R
EC-371 SEF152R