NISSAN ALMERA N15 1995 Service Manual
Page 1071 of 1701
Repairharness orcon-
nectors.
NG
CHECK GROUND CIRCUIT.
1. Turn ignition switch"OFF".
2. Disconnect coolingfanmotor-1 har-
ness connector andcooling fan
motor-2 harness connector.
Ia
3.Check harness continuity between
terminal
@
and terminal
@,
ter-
minal
@
and terminal
@,
termi-
nal
CV
and body ground.
Continuity shouldexist.
If OK, check harness forshort.
II
4.Check harness continuity between
terminal
@
and terminal
@,
ter-
minal
@
and terminal
@,
termi-
nal
CV
and body ground.
Continuity shouldexist.
If OK, check harness forshort.
1f,
2
3 4
Cooling fan
motor-1
harness
connector
TROUBLE
DIAGNOSIS FORNON';DETECTABLE ITEMS
Cooling FanControl (Cont'd)
@
1
~ ii
O
Cooling
6
3
fan
7 5
relay-2
2 1
II
~ iifO
Cooling
6
3
fan
7 5 relay-3
2 1 SEF782PA
tllii
It
Cooling fan
motor-2
harness
connector
111
CHECK OUTPUT SIGNALCIRCUIT.
1. Disconnect ECMharness connector.
2. Check harness continuity between
ECM terminal
@J
and terminal
@.
Continuity shouldexist.
If OK, check harness forshort.
OK
CHECK COMPONENT
(Cooling fanrelays-2, 3).
Refer to"COMPONENT INSPECTION"
on next page.
NG
NG
Check
thefollowing.
• Harness connectors
CID.@
• Harness connectors
@,@
• Harness foropen or
short between cooling
fan relays-2. 3and ECM
If NG. repair harness or
connectors.
Replace coolingfan
relays.
OK
CHECK COMPONENTS
(Cooling fanmotors).
Refer to"COMPONENT INSPECTION"
on next page. Replace
coolingfan
motors.
OK
Disconnect andreconnect harnesscon-
SEF783PA
nectarsinthe circuit. Thenretest.
II
~15
~Io
f,:j!
I
Cooling
ECM
ElCONNECTORI
fan
10
relay-2,-3
~
[?Ffu
Trouble
isnot fixed.
Check ECMpinterminals fordamage
and check theconnection ofECM har-
ness connector. ReconnectECMhar-
ness connector andretest.
INSPECTION END
MEC7788 EC-352
Page 1072 of 1701
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
Page 1073 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS~
Power Steering OilPressure Switch
EC-PST/SW-01
PWST
1~31
PU/W
I
PU/W
Irnl
CfID
=r@
PU/W
I
PU/W
I$J'CMID
~
pu/w
I
ECM
(ECCS
CONTROL
MODULE)
em
-:
Detectable line
for DTC
-: Non-detectable
line for
DTC
POWER STEERING
OIL PRESSURE
SWITCH
(g)
ON
OFF .....--
~B
I
,-,
B B
-L -L
@
<1;51)
~@
U@
GY
Refer
tolast page
(Foldout page).
CHID
m
,
em
L
EC-354 HEC018
Page 1074 of 1701
MEC730B
•
INSPECTION
START
DIAGNOSTIC
PROCEDURE
CHECK OVERALL FUNCTION.
~
INSPECTION
END
I
1. Start engine andwarm itup suffi-
ciently.
00
2.
Perform "PW/STSIGNAL
CIRCUIT" in"FUNCTION
TEST" modewithCONSULT.
OR
@
2.
Check "PW/ST SIGNAL" in
"DATA MONITOR" modewith
CONSULT.
Steering isin neutral
position: OFF
Steering isturned:
ON
OR
@
2.
Check voltage between ECM
terminal
@
and ground.
Voltage:
When steering wheelis
turned quickly.
Approximately OV
Except above
Approximately 8-10V
~NG
+
-
SEF5911
MEF023E
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS[][]
Power Steering OilPressure Switch(Cont'd)
COMPONENT DESCRIPTION
The power steering oilpressure switchisattached tothe power
steering high-pressure tubeanddetects apower steering load.
When apower steering loadisdetected, itsignals theECM. The
ECM adjusts theIACV-AAC valvetoincrease theidle speed and
adjust forthe increased load.
RECORD
NEXT
II
START
•
PW/ST SIGNAL CIRCUIT.
HOLD STEERING WHEEL
IN AFULL
LOCKED
POSITION
THEN
TOUCH START
-crMONITOR -crNOFAIL
0
PW/ST SIGNAL OFF
Hoodledge
RH~
m
1='
=EC=M
=.,~
CONNECTORII ~
is
43
00
[Y]
.".MEF315F
EC-355
Page 1075 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
mJ
Power Steering OilPressure Switch
(Cont'd)
~i5
dIb
~i5
II
ECM
~CONNECTORII
43 AEC760
SEF501Q
@
1
CHECK GROUND CIRCUIT. NG
Repair harness orcon-
1. Turn ignition switch"OFF".
--..
nectors.
2. Disconnect powersteering oilpres-
sure switch harness connector.
3. Check harness continuity between
terminal
@
and engine ground.
Continuity shouldexist.
If OK, check harness forshort.
OK
[!J
CHECK INPUTSIGNAL CIRCUIT. NG
Check thefollowing.
1. Disconnect ECMharness connector.
--..
•Harness connectors
2. Check harness continuity between
CID,@
ECM terminal
@
and terminal
CD.
•
Harness connectors
Continuity shouldexist.
@,@D
If OK, check harness forshort. •
Harness foropen or
OK short
between ECMand
power steering oilpres-
sure switch
If NG, repair harness or
connectors.
Power steering oilpressure switch
1. Disconnect powersteering oilpressure switchharness con-
nector thenstart engine.
2. Check continuity betweenterminals
CD
and
@.
~
to
ID
~
CHECK
COMPONENT
(Power steering oilpressure switch).
Refer to"COMPONENT INSPECTION"
below.
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
COMPONENT INSPECTION
Conditions
Steering wheelisbeing turned
Steering wheelisnot being turned NG
Replace powersteering
oil pressure switch.
Continuity
Yes
No
AEC762
IfNG, replace powersteering oilpressure switch.
EC-356
Page 1076 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS~
Park/Neutral PositionSwitch
EC-PNP/SW-01
•
A/T
models
MlT models
Detectable line
for DTC
Non-detectable line forDTC
(A):
@:
-:
-:
• INHIBITOR
P ..... ..
1SWITCH
R N-D 2
(W):(A)
ECM
(ECCS
CONTROL
MODULE)
ill)
NEUTRAL
POSITION
SWITCH
@ID:
@
NEUT
1
3•5
1
G/OR
I
G/OR
I$I@
@
G/OR
1$1
CMID
~
G/OR
I ~~
O---a>---
G/OR.j
Qr
G/OR --
t
G/OR
IdJl~
=r
(£201)
G/OR
I
G/OR
m
OTHER --
~~
tIDIDZIID
GY
fITilll~
~ B
Refer
tolast page
(Foldout page).
(][) (E10t)
,
~ (E220)
tgJ
B
~
«222)
~ GY
(IT)
L
HEC019
EC-357
Page 1077 of 1701
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
[ill
Park/Neutral PositionSwitch(Cont'd)
When thegear position isin "P" (A/T models only)or"N",
park/neutral positionis"ON". ECMdetects theposition
because thecontinuity ofthe line (the "ON" signal) exists.
INSPECTION END
OK
NG
INSPECTION
8TART
DIAGNOSTIC
PROCEDURE
Neutral position switch
(M/T
mod-
els)
CHECK OVERALL FUNCTION.
1 Turn ignition switch"ON".
(Iii'"
2.Perform "PARK/NEUT POSI
~ SWCKT" in"FUNCTION
TEST" modewithCONSULT.
OR
(F.i\
2.Select "PINPOSI SW"in
\J!J
"DATAMONITOR" modewith
CONSULT.
3. Check "PINPOSI SW"signal
under thefollowing conditions.
Neutral position: ON
Except neulral posllion: OFF
SEF963N OR
~ 2.Check vo~ge between ECM
~ terminal~and ground under
the following conditions.
Voltage: Neutral position
Approximately OV
Excepl neutral position
Ballery voltage
m
•PARKINEUT POSISWCKT •
SHIFT
OUT OF
NIP
-POSITION
THEN
TOUCH START
I
NEXT
II
START
I
MEC731B
m
*MONITOR *NO FAIL
0
PIN POSI SW ON
RECORD
m ~
CONNECT~~
lAID£)~~
II
ECM
EcoNNECTORl1
35
MEC779B
EC-3S8
Page 1078 of 1701
•
CHECK
GROUND CIRCUIT.
NG
Check thefollowing.
1. Turn ignition switch"OFF".
--..
•Harness connectors
2. Disconnect neutralposition switch
(ill1),
(ill)
harness connector. •Harness foropen or
3. Check harness continuity between shortbetween neutral
terminal @and body ground.
positionswitchand
Continuity shouldexist.
bodyground
If OK, check harness forshort. IfNG, repair harness or
OK connectors.
[!]
.
CHECK INPUTSIGNAL CIRCUIT.
NG
Check thefollowing.
1. Disconnect ECMharness connector.
f-----
•Harness connectors
2. Check harness continuity between
@,@
ECM terminal
@
and terminal
CD.
•
Harness connectors
Continuity shouldexist.
@,@D
If OK, check harness forshort. •Harness connectors
OK
@),@
• Harness foropen or
short between ECMand
neutral position switch
If NG, repair harness or
connectors.
CHECK COMPONENT NG
Replace neutralposition
(Neutral positionswitch).
~
switch.
Refer toMT section.
OK
AEC750
SEF503Q
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Park/Neutral PositionSwitch(Cont'd)
@
1
~Io ~Io
II
ECM
Ef
CONNECTOR
II
illDJ
35
Disconnectandreconnect 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-359
Page 1079 of 1701
INSPECTIONEND
INSPECTION
START
CHECK OVERALL FUNCTION. OK
fiii\
1.Turn ignition switch"ON".
~ 2.Perform "PARK/NEUT POSI
SW CKT" in"FUNCTION
TEST" modewithCONSULT.
OR
rif1
1.Turn ignition switch"ON".
~ 2.Select "PINPOSI SW"in
"DATA MONITOR" modewith
CONSULT.
3. Check "PINPOSI SW"signal
under thefollowing conditions.
"N"
or
"P"
position: ON
Except aboveposition: OFF
OR
1. Make surethatinhibitor switch
circuit functions properly.
(Refer toAT section.)
2. Turn ignition switch"ON".
3. Check voltage between ECM
terminal @and ground under
the following conditions.
Voltage: UN" or
uP"
position
Approximately OV
Except aboveposition
Battery voltage
SEF963N
MEC7798
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Park/Neutral PositionSwitch(Cont'd)
I
Inhibitor
switch(AIrmodels)
J
m
•PARKINEUT POSISWCKT •
SHIFT
OUT OFNIP-POSITION
THEN
TOUCH START
I
NEXT
II
START
I
MEC7318
m
*MONITOR *NO FAIL
0
PIN POSI SW ON
RECORD
m~i)~0
II
ECM
~CONNECTORII
30
NG
EC-360
Page 1080 of 1701
•
CHECK
GROUND CIRCUIT.
NG
Check thefollowing.
1. Disconnect inhibitorswitchharness
f----+
•Harness connectors
connector.
@ill,@
2. Check harness continuity between •
Harness foropen or
terminals
CD
and body ground. short
between inhibitor
Continuity shouldexist.
switchandbody ground
If OK, check harness forshort. If
NG, repair harness or
OK connectors.
[i
CHECK INPUTSIGNAL CIRCUIT.
NG
Check thefollowing.
1. Disconnect ECMharness connector.
----.
•Harness connectors
2. Gheck harness continuity between
QD,@
ECM terminal
@
and terminal
@.
•Harness connectors
Continuity shouldexist.
@,@[!)
If OK, check harness forshort. •Harness connectors
OK
@,@
• Harness foropen or
short between ECMand
inhibitor switch
If NG, repair harness or
connectors.
MEC780B
MEF791EA
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Park/Neutral PositionSwitch(Cont'd)
@
1
~i5
@B
ECM
~CONNECTORI
35
~.
\:lliJ
CHECK
COMPONENT
(Inhibitor switch).
Refer to
AT
section.
OK NG
Replace inhibitorswitch.
Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Trouble isnot fixed.
MEC781B
CheckECMpinterminals fordamage
and check theconnection ofECM har-
ness connector. ReconnectECMhar-
ness connector andretest.
INSPECTION END
EC-361