1995 NISSAN ALMERA N15 wheel

ANTI-LOCKBRAKESYSTEM
Wiring Diagram -ABS -(Cont'd)

BR-ABS-04

ASS
CONTROL
SENSOR UNIT
FR-LH
~

H

~ LHO
models
L
t

•
@:

RHOmodels

0
L
L

-
-
-
--

-ec
,.

)

I

I
I

I
I
I
I

----
1--

']

)

t

----

I

R~ L

I

I

$---$J

I

I
R
L

1
1
-
-
--

I

mJOINT
I

I'-- --
!

I

1

CONNECTOR
I
I

I

-7
I
1
I

(B109)
l--•

1
-----

A@L ]

I$f---J$-J
R
(ffi1)
L

-----
(,
.

I I
-

---

1

I
I

I

--
,I

II

t
)

(
)

-----
-----

R L R
L

M
.>'EELSPEED

M
WHEEL
SPEED

SENSOR SENSOR

-
rvFRONTLH
rvFRONTLH

(eUO)
(8106)
@

~~(@
56 iBl91 ...IE.

@,(~)

(tig)
SR SR
BR-48 ~(B109)

illIIIIIIIIIl
GY
Refer
tolast page
(Foldout page).

HBR005

ANTI-LOCKBRAKESYSTEM
Wiring Diagram -ABS -(Conl'd)

BR-ABS-05

-----
-----
A8S

CONTROL

UNIT


SENSOR
RR-LH

H

~ L
t

"
----
/)

I

I
I
I

I

I

I

I

I

SENSOR
RR-LH
(+)

lY;ll
P
J

r-:l~!
I

JOINT

I .
CONNECTOR-7

I
@QID

r

(8110)

SENSOR
RR-RH

H

1
3•8
1
LG
t

(
....

SENSOR
RR-RH
(+)

~ PU
J

----
'I

/
I

1
1
I
I

I

I
I

I
I

I

I

I

I
I

I

,I
)

•

PU LG

M
WHEELSPEED

SENSOR
rv REARRH

(!W)
P
L

M
WHEELSPEED

SENSOR

rv
REARLH

(ffi?)

15a
([UID ,
@TI)

C!J.g)
GYSR ~(8109)
l:TIIillIIIIIJ
GY
Refer
tolast page
(Foldout page).

HBR006
BR-49

TROUBLEDIAGNOSES
Contents
How toPerform TroubleDiagnoses forQuick andAccurate Repair SR-52
Self-diagnosis SR-53
CONSULT BR-58
CONSULT Inspection Procedure BR-59
Component PartsandHarness Connector Location BR-64
Preliminary Check BR-65
Ground CircuitCheck BR-66
Circuit Diagram forQuick Pinpoint Check BR-67
Diagnostic Procedure1Warning lampdoes notcome on BR-68
Diagnostic Procedure2Warning lampstays on BR-69
Diagnostic Procedure3ABS actuator solenoid valve BR-72
Diagnostic Procedure 4Wheel sensor orrotor BR-74
Diagnostic Procedure5Motor relayormotor BR-76
Diagnostic Procedure6Solenoid valverelay BR-79
Diagnostic Procedure7Power supply BR-81
Diagnostic Procedure 8Control unit BR-82
Diagnostic Procedure9Pedal vibration andnoise BR-82
Diagnostic Procedure10Long stopping distance BR-83
Diagnostic Procedure11Unexpected pedalaction BR-83
Diagnostic Procedure12ABS does notwork BR-84
Diagnostic Procedure13ABS works frequently BR-84
Electrical Component Inspection BR-85
How toPerform TroubleDiagnoses forQuick
and Accurate Repair
INTRODUCTION

The ABS system hasanelectronic controlunittocontrol major
functions. Thecontrol unitaccepts inputsignals fromsensors
and instantly drivestheactuators. Itis essential thatboth kinds
of signals areproper andstable. Itis also important tocheck
for conventional problems:suchasair leaks inbooster lines,
lack ofbrake fluid,orother problems withthebrake system.

SEF233G
Itis much moredifficult todiagnose aproblem thatoccurs
intermittently ratherthancontinuously. Mostintermittent prob-
lems arecaused bypoor electric connections orfaulty wiring.
In this case, careful checking ofsuspicious circuitsmayhelp
prevent thereplacement ofgood parts.
A visual checkonlymaynotfind thecause ofthe problems, so
a road testshould beperformed.
Before undertaking actualchecks, takejustafew minutes to
talk with acustomer whoapproaches withaABS complaint. The
customer isavery good source ofinformation onsuch prob-
lems; especially intermittent ones.Through thetalks withthe
customer, findoutwhat symptoms arepresent andunder what

SEF234G
conditions theyoccur.
Start yourdiagnosis bylooking for"conventional" problems
first. Thisisone ofthe best ways totroubleshoot brakeprob-
lems onanABS controlled vehicle.

BR-52

TROUBLEDIAGNOSES
CONSULT
CONSULT APPLICATION TOASS

ITEM SELF-DIAGNOSTIC
DATAMONITOR ACTIVETEST
RESULTS
Front rightwheel sensor

XX

-

Front leftwheel sensor

XX

-

Rear rightwheel sensor

XX

-

Rear leftwheel sensor

XX
-

Stop lamp switch

-
X

-

Front rightinletsolenoid valve

XXX

Front rightoutlet solenoid valve

X
XX

Front leftinlet solenoid valve

XXX

Front leftoutlet solenoid valve
XX
X

Rear rightinletsolenoid valve

XX
X

Rear leftinlet solenoid valve
XXX

Rear rightoutlet solenoid valve
X
XX

Rear leftoutlet solenoid valve

X
X
.X

Actuator solenoid valverelay

XX
-

Actuator motorrelay
(ABS MOTOR isshown onthe Data Monitor
X
XX

screen.)
ABS warning lamp
-

X

-

Battery voltage
XX
-

X: Applicable
-; Not applicable

ECU partnumber mode

Ignore theECU partnumber displayed inthe ECU PART NUMBER MODE.Refertoparts catalog toorder
the ECU.

BR-58

TROUBLEDIAGNOSES
CONSULT Inspection Procedure(Conl'd)
SELF-DIAGNOSTIC RESULTSMODE

Diagnostic item
Diagnosticitemisdetected when... Diagnostic
procedure
FR RH SENSOR
•Circuit forfront rightwheel sensor isopen.

4

[OPEN] (Anabnormally highinput voltage isentered.)
FR LH SENSOR
•Circuit forfront leftwheel sensor isopen.

4

[OPEN] (Anabnormally highinput voltage isentered.)
RR RHSENSOR
•Circuit forrear right sensor isopen.

4

[OPEN] (Anabnormally highinput voltage isentered.)
RR LHSENSOR
•Circuit forrear leftsensor isopen.

4

[OPEN] (Anabnormally highinput voltage isentered.)
FR RH SENSOR
•Circuit forfront rightwheel sensor isshorted.

4

[SHORT] (Anabnormally lowinput voltage isentered.)
FR LH SENSOR
•Circuit forfront leftwheel sensor isshorted.

4

[SHORT] (Anabnormally lowinput voltage isentered.)
RR RH SENSOR
•Circuit forrear right sensor isshorted.

4

[SHORT] (Anabnormally lowinput voltage isentered.)
RR LHSENSOR
•Circuit forrear leftsensor isshorted.

4

[SHORT] (Anabnormally lowinput voltage isentered.)
ABS SENSOR
•Teeth damage onsensor rotororimproper installation ofwheel sensor.

4

[ABNORMAL SIGNAL]
(Abnormalwheelsensor signalisentered.)
FR RH INABS SOL
•Circuit forfront rightinletsolenoid valveisopen.

3

[OPEN] (Anabnormally lowoutput voltage isentered.)
FR LH INABS SOL
•Circuit forfront leftinlet solenoid valveisopen.

3

[OPEN] (Anabnormally lowoutput voltage isentered.)
RR RH INABS SOL
•Circuit forrear right inletsolenoid valveisopen.

3

[OPEN] (Anabnormally lowoutput voltage isentered.)
RR LHINABS SOL
•Circuit forrear leftinlet solenoid valveisopen.

3

[OPEN] (Anabnormally lowoutput voltage isentered.)
FR RH INABS SOL
•Circuit forfront rightinletsolenoid valveisshorted.

3

[SHORT] (Anabnormally highoutput voltage isentered.)
FR LH INABS SOL
•Circuit forfront leftinlet solenoid valveisshorted.

3

[SHORT] (Anabnormally highoutput voltage isentered.)
RR RH INABS SOL
•Circuit forrear right inletsolenoid valveisshorted.

3

[SHORT] (Anabnormally highoutput voltage isentered.)
RR LHINASS SOL
•Circuit forrear leftinlet solenoid valveisshorted.

3

[SHORT] (Anabnormally highoutput voltage isentered.)
FR RH OUT ABSSOL
•Circuit forfront rightoutlet solenoid valveisopen.

3

[OPEN] (Anabnormally lowoutput voltage isentered.)
FR LH OUT ASS SOL
•Circuit forfront leftoutlet solenoid valveisopen.

3

[OPEN] (Anabnormally lowoutput voltage isentered.)
RR RH OUT ASSSOL
•Circuit forrear right outlet solenoid valveisopen.

3

[OPEN] (Anabnormally lowoutput voltage isentered.)
RR LHOUT ABSSOL
•Circuit forrear leftoutlet solenoid valveis.open.

3

[OPEN] (Anabnormally lowoutput voltage isentered.)
FR RH OUT ASSSOL
•Circuit forfront rightoutlet solenoid valveisshorted.

3

[SHORT] (Anabnormally highoutput voltage isentered.)
FR LH OUT ABSSOL •Circuit forfront leftoutlet solenoid valveisshorted.

3

[SHORT] (Anabnormally highoutput voltage isentered.)
RR RHOUT ABSSOL •Circuit forrear right outlet solenoid valveisshorted.

3

[SHORT] (Anabnormally highoutput voltage isentered.)
RR LHOUT ASSSOL •Circuit forrear leftoutlet solenoid valveisshorted.

3

[SHORT] (Anabnormally highoutput voltage isentered.)
ABS ACTUATOR RELAY
•Actuator solenoid valverelayisON, even control unitsends offsignal.
6
[FAILURE] •Actuator solenoid valverelayisOFF, even control unitsends onsignal.
ABS MOTOR
•Circuit foractuator motorisopen orshorted.

5

[FAILURE] •Actuator motorrelayisstuck.
BATTERY VOLT
•Power source voltage supplied toABS control unitisabnormally low. 7
[VB-LOW]
CONTROL UNIT •Function ofcalculation inASS control unithasfailed.
8

BR-50

DATAMONITOR MODE TROUBLE
DIAGNOSES
CONSULT Inspection Procedure(Cont'd)
MONITOR ITEM CONDITION
SPECIFICATION
FR RH SENSOR
FR LHSENSOR Drive
vehicle.
Almostthesame speed asspeedometer.
REAR RHSENSOR (Each
wheel isrotating.)
REAR LHSENSOR
STOP LAMP SW Brake
isdepressed. Depress
thepedal: ON
Release thepedal: OFF
FR RH INSOL
FR RH OUT SOL
FR LH INSOL
FR LH OUT SOL
Engineisrunning. Operating
conditions foreach solenoid valveareindicated.
RR RH INSOL ABS
isnot operating: OFF
RR RH OUT SOL
.

RR LHINSOL
RR LHOUT SOL
IgnitionswitchON(Engine stops):OFF
ACTUATOR RLY
Enginerunning: ON
MOTOR RELAY ABS
isnot operating: OFF
Ignition switchisON or
ABSisoperating: ON
engine isrunning.
WARNING LAMP Warning
lampisturned on:ON
Warning lampisturned off:OFF
BATTERY VOLT Power
supply voltage forcontrol unit
ACTIVE TESTMODE
TEST ITEM CONDITION JUDGEMENT
Brake fluidpressure controloperation
FR RH SOLENOID
INSOL OUTSOL
FR LH SOLENOID
RR RH SOLENOID UP
(Increase): OFF OFF
RR LHSOLENOID
Engineisrunning. KEEP
(Hold): ON OFF
DOWN (Decrease): ON ON
ABS actuator motor
ABS MOTOR ON:
Motor runs
OFF: Motor stops
Note: Active testwillautomatically stoptenseconds afterthe
test starts. (LIMIT SIGNAL monitorshowsON.)
BR-63
•

TROUBLEDIAGNOSES
Component PartsandHarness Connector
Location
RHO models

Dualproportioning

valve

DABS warninglamp
X

1.1
ABS relay box
Brake master cylinder ~
Rear wheel sensors

Ii
Rear rightwheel
sensor connector

[i1
Rear leftwheel
sensor connector
• For LHD models, controlunit
is located onthe opposite side.

SBR047DA
BR-64

TROUBLEDIAGNOSES

~i5

E(
C/UNITCONNECTOR
P

,14.9.11 .12, ,15.10.38.13,

SBR247DDiagnostic
Procedure4
WHEEL SENSOR ORROTOR
(Malfunction codeNo.21,22,25,26,31, 32,35, 36or18)

1. Disconnect connectors fromcontrol
~Inspection end

I

unit and wheel sensor ofmalfunction
code No.Check terminals fordam-
age orloose connections. Then
reconnect connectors.
2. Carry outself-diagnosis again.

Does warning lampactivate again?

Yes

m
WHEEL SENSOR ELECTRICAL CHECK
OK

~@
(Seenextpage.)
1. Disconnect controlunitconnector.
2. Check resistance betweencontrol
unit connector terminals.
Code No.21or22 (Front RHwheel)
Terminals
@
and @
Code No.25or26 (Front LHwheel)
Terminals
@
and
@

Code No.31or32 (Rear RHwheel)
Terminals
@
and
@

Code No.35or36 (Rear LHwheel)
Terminals
@
and
@

Resistance: 0.8•1.2 kD

NG
Note Note

CHECK WHEELSENSOR.

~Replace wheelsensor.

I

Refer toWHEEL SENSOR inElectrical
Components Inspection,SR-85.
OK
Note
Note:
Wheel position should

Repair harness andconnectors
be
distinguished by

between controlunitconn'ector and
code
No.
exceplcode

wheel sensor connector.
No.
18(sensor rotor).
BR-74