1995 NISSAN ALMERA N15 brake sensor

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
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)

I

I
I

I
I
I
I

----
1--

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)

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)
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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

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
•