fuse box ACURA RL KA9 1996 Service Workshop Manual

Troubleshooting
ABS Indicato r Ligh t Doe s No t G o Of f (N o DTC ) (cont'd )
(From pag e 19-45 )
Chec k th e under-hoo d fuse /
relay box :Measur e th e voltag e betwee n th e
under-hoo d fuse/rela y bo x 9 P
connecto r termina l No . 1 an dbody ground .
Is ther e batter y voltage ?
Chec k fo r a n ope n in th e +B 2 cir -
cuit :
1 . Disconnec t th e AB S contro l
unit 22 P an d 26 P connectors .2. Measur e th e voltag e betwee nthe AB S contro l uni t 26 P con -necto r termina l No . 1 3 an dbody ground .
I s ther e batter y voltage ? UNDER-HOO
D FUSE/RELA Y BO X
9 P CONNECTO R
Replac e th e under-hoo d fuse /
rela y box .
Wire sid e o f femal e terminal s
AB S CONTRO L UNI T 26 P CONNECTO R
Repair ope n in th e wir e betwee nthe under-hoo d fuse/rela y bo x
an d AB S contro l unit .
NOTE : Chec k wit h th e AB S contro l uni tconnector s disconnected .
Does th e AB S indicato r ligh tcom e on ? Repai
r shor t t o bod y groun d i n
th e wir e betwee n th e AB S indi -
cato r ligh t an d AB S contro l unit .
(T o pag e 19-47 )
Wire sid e o f femal e terminal s
Check fo r a shor t t o bod y groun d
i n th e WAR N circuit :
Turn th e ignitio n switc h O N (II) .
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Troubleshooting
DTC 1-2 : Pum p Moto r
The AB S contro l uni t check s th e condition s a t th e pum p moto r rela y driv e (PMR ) termina l an d moto r chec k (MCK ) termina l
during th e initia l diagnosi s an d regula r diagnosis . Whe n th e AB S contro l uni t detect s th e followin g condition s durin g th e
diagnosis , i t keep s th e AB S indicato r ligh t on . Whe n th e followin g condition s ar e detecte d afte r th e AB S indicato r ligh t
goe s off , th e AB S contro l uni t turn s th e AB S indicato r ligh t o n again .
Batter y voltag e a t th e MC K termina l wit h a n OF F signa l a t th e PM R termina l
O V at th e MC K termina l wit h a n O N signa l a t th e PM R termina l
Possible causes :
Open circui t o r shor t t o bod y groun d betwee n th e R/ C MIRRO R (7. 5 A ) fus e an d under-hoo d fuse/rela y bo x
Ope n circui t o r shor t t o bod y groun d in th e PM R circui t insid e th e under-hoo d fuse/rela y bo x
Fault y pum p moto r rela y
Open circui t o r shor t t o bod y groun d in th e PM R circui t betwee n th e under-hoo d fuse/rela y bo x an d AB S contro l uni t
Ope n circui t betwee n th e batter y an d under-hoo d fuse/rela y bo x
Blow n AB S MOTO R (4 0 A ) fus e
Blow n AB S UNI T (7. 5 A ) fus e
Ope n circui t o r shor t t o bod y groun d in th e moto r driv e circui t an d MC K circui t insid e th e under-hoo d fuse/rela y bo x
Ope n circui t o r shor t t o bod y groun d in th e MC K circui t betwee n th e under-hoo d fuse/rela y bo x an d AB S contro l uni t
Ope n circui t o r shor t t o bod y groun d betwee n th e under-hoo d fuse/rela y bo x an d pum p moto r
Fault y pum p moto r
Open circui t betwee n th e pum p moto r an d bod y groun d o r poo r groun d
Faulty AB S contro l uni t
With engin e running , AB S indi -cato r ligh t i s ON .With th e SC S servic e connec -tor connecte d (se e pag e19-40 ), DT C 1- 2 is indicated .
UNDER-HOO D FUSE/RELA Y BO X
ABS PUM P MOTO R RELA Y
ABS UNI T (7. 5 A ) FUS E
Chec k th e AB S MOTO R (4 0 A ) fus ein th e under-hoo d fuse/rela y box .
Is th e fus e OK ?Replac e th e fus e an d recheck .
NOTE: Reinstal l th e fus e if i t i s OK .
ABS MOTO R (4 0 A ) FUS E
Is th e fus e OK ?Replac e th e fus e an d recheck .
YES
NOTE : Reinstal lthe fus e if i t i s OK .
NOTE : Reliev e syste m pressur e fro m th emodulato r uni t blee d screw , the n star t th eengin e an d rechec k th e fuse . I f th e fus e i sblown , chec k fo r a shor t t o bod y groun d inth e MC K circuit .(To pag e 19-51 )
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Troubleshooting
DTC 1-2 : Pum p Moto r (cont'd )
(From pag e 19-51 )
Chec k fo r a n ope n in th e IG 2 cir -
cuit :
Measur e th e voltag e betwee n th e
under-hoo d fuse/rela y bo x 5 P
connecto r termina l No . 2 an dbody ground .
Is ther e batter y voltage ?
Chec k th e AB S pum p moto r rela y
operation :
1 . Connec t th e under-hoo d fuse /
rela y bo x 3 P connector.
2 . Instal l th e AB S pum p moto r
relay .
Doe s th e AB S pum p moto r
rela y operate ?
Chec k fo r a n ope n i n th e under -
hoo d fuse/rela y box :
Measur e th e voltag e betwee n th e
under-hoo d fuse/rela y bo x 5 P
connecto r termina l No . 1 an d
bod y ground .
I s ther e batter y voltage ?
Chec k fo r a n ope n in th e PM R cir -
cuit :
Measur e th e voltag e betwee n th e
AB S contro l uni t 22 P connecto r
termina l No . 2 1 an d bod y ground .
I s ther e batter y voltage ?
Reconnec t th e connector s prop -
erly , reliev e syste m pressur e an d
star t th e engine . I f DT C 1- 2 i s
store d again , replac e th e AB S
contro l unit . NOTE
: Th e AB S pum p moto r rela y coi l circui t
i s checke d beginnin g wit h thi s step .
UNDER-HOO D FUSE/RELA Y BO X5P CONNECTO R
Repair ope n in th e wir e betwee n
th e R/ C MIRRO R (7. 5 A ) fus e in th e
under-das h fuse/rela y bo x an d th e
under-hoo d fuse/rela y box . Wir
e sid e o f femal e terminal s
(T o pag e 19-55 )
T o chec k fo r a shor t t o bod y groun d
i n th e AB S pum p moto r rela y coi l cir -
cuit
NOTE : Th e AB S pum p moto r rela y coi l circui t
i s checke d fo r a n ope n beginnin g wit h thi s
step .
UNDER-HOO D FUSE/RELA Y BO X
5 P CONNECTO R
Replace th e under-hoo d fuse /
rela y box .
(Ope n circui t insid e th e box ) Wir
e sid e o f femal e terminal s
AB S CONTRO L UNI T 22 P CONNECTO R
Repai r ope n in th e wir e betwee n
th e under-hoo d fuse/rela y bo x
an d AB S contro l unit .
NOTE : Ad d brak e flui d i f th e flui d leve l i s
lowe r tha n th e MI N line . Wir
e sid e o f femal e terminal s
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(From pag e 19-51 )
Chec k fo r a n ope n i n th e under -
hoo d fuse/rela y box :
1 . Connec t th e AB S pum p moto r
rela y connecto r + B an d MOTO R
terminal s wit h a jumpe r wire .2. Measur e th e voltag e betwee n
th e under-hoo d fuse/rela y bo x
3 P connecto r termina l No . 1
an d bod y ground . NOTE
: Th e AB S pum p moto r driv e circui t i s
checke d beginnin g wit h thi s step . UNDER-HOO
D FUSE/RELA Y BO X
3 P CONNECTO R
I s ther e batter y voltage ? Replac
e th e unde r hoo d fuse /
rela y box .
Wire sid e o f femal e terminal s
AB S PUM P MOTO R 2 P CONNECTO R
I s ther e batter y voltage ?
Repair ope n in th e wir e betwee nthe under-hoo d fuse/rela y bo x
an d AB S pum p motor .
Wire sid e o f femal e terminal s
Chec k fo r a n ope n in th e MOTO R
GN D circuit :
Measur e th e voltag e betwee n th e
AB S pum p moto r 2 P connecto r
terminal s No . 1 an d No . 2 .
I s ther e batter y voltage ? Repai
r ope n in th e wir e betwee n
th e AB S pum p moto r an d bod y
ground .Repair poo r groun d (G251 )
Replac e th e AB S pum p motor .
Chec
k fo r a n ope n in th e MOTO R
+ B circuit :
1. Disconnec t th e AB S pum pmotor 2 P connector .
2 . Measur e th e voltag e betwee n
th e termina l No . 1 an d bod y
ground .
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Troubleshooting
DTC 1-2 : Pum p Moto r (cont'd )
(From pag e 19-51 )
NOTE: Th e MC K (moto r check ) circui t i s
checke d beginnin g wit h thi s step .
UNDER-HOO D FUSE/RELA Y BO X7P CONNECTO R
Replace th e under-hoo d fuse /
rela y box .
(Ope n circui t insid e th e box ) Wir
e sid e o f femal e terminal s
Chec k fo r a n ope n in th e MC K cir -
cuit :
Measur e th e voltag e betwee n th e
AB S contro l uni t 26 P connecto r
termina l No . 1 7 an d bod y ground . AB
S CONTRO L UNI T 26 P CONNECTO R
I s ther e abou t 10V ? Repai
r ope n in th e wir e betwee n
th e under-hoo d fuse/rela y bo x
an d AB S contro l unit .
Wire sid e o f femal e terminal s
Chec k fo r loos e AB S contro l uni t
connectors . I f necessary , substi -
tut e a known-goo d AB S contro l
uni t an d recheck .
Chec
k fo r a n ope n in th e under -
hoo d fuse/rela y box :
1 . Disconnec t th e under-hoo d
fuse/rela y bo x 7 P connector .
2 . Measur e th e voltag e betwee n
termina l No . 3 an d bod yground .
I s ther e abou t 1 0 V ?
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(From pag e 19-52 )
Chec k fo r a shor t i n th e under -
hoo d fuse/rela y box :
1 . Remov e th e AB S pum p moto r
relay.2. Disconnec t th e under-hoo d
fuse/rela y bo x 5 P connector .
3 . Chec k fo r continuit y betwee n
th e AB S pum p moto r rela y
connecto r PM R termina l an d
bod y ground .
I s ther e continuity ?
Chec k fo r a shor t i n th e PM R cir -
cuit :
1 . Disconnec t th e AB S contro l
uni t 22 P connector .
2 . Chec k fo r continuit y betwee n
termina l No . 2 1 an d bod y
ground .
NOTE:Short t o bod y groun d i n th e AB S pum p
moto r rela y coi l circui t i s checke d beginnin g
wit h thi s step .
I f th e moto r rela y coi l i s shorte d t o bod y
ground , th e moto r ma y b e damaged . Chec k
th e pum p moto r operation . UNDER-HOO
D FUSE/RELA Y BO X
PM R TERMINA L
Replac e th e under-hoo d fuse /
relay box .(Shor t circui t insid e th e box )
ABS CONTRO L UNI T 22 P CONNECTO R
I s ther e continuity ?
Repair shor t t o bod y groun d in th ewir e betwee n th e under-hoo d
fuse/rela y bo x an d AB S contro l
unit . Wir
e sid e o f femal e terminal s
Chec k fo r loos e AB S contro l uni t
connectors . I f necessary , substi -
tut e a known-goo d AB S contro l
uni t an d recheck .
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(From pag e 19-80 )
I s th e fus e OK ?
Chec k th e under-hoo d AB S fuse /
rela y box :
Measur e th e voltag e betwee n th e
under-hoo d fuse/rela y bo x 7 P
connecto r termina l No . 4 an dbod y ground .
Is ther e batter y voltage ?
Chec k fo r a n ope n i n th e B 1 cir -
cuit :
1 . Remov e th e fron t fail-saf e relay .
2 . Measur e th e voltag e betwee n
termina l No . 2 an d bod y ground .
I s ther e batter y voltage ?
I s th e rela y OK ?
(T o pag e 19-82 ) UNDER-HOO
D FUSE/RELA Y BO X
Replac e th e fuse , an d recheck .
NOTE : Reinstal l th e fus e i f i t i s OK .
UNDER-HOO D FUSE/RELA Y BO X7P CONNECTO R
Repair ope n i n th e wir e betwee n
th e under-hoo d fuse/rela y bo x
an d fron t fail-saf e relay .
1
Termina l sid e o f
femal e terminal s
Replac e th e fron t fail-saf e relay .
Chec
k th e fron t fail-saf e rela y (se e
sectio n 23) . FRON
T FAIL-SAF E RELA Y CONNECTO R
Replac
e th e under-hoo d fuse /
rela y box . (Interna l open )
Wire sid e o f femal e terminal s
Chec
k th e AB S B 1 (2 0 A ) fus e in th e
under-hoo d fuse/rela y box .
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Component Locations

SERVICE CHECK CONNECTOR (2P)

RIGHT-REAR WHEEL SENSOR

ABS CONTROL UNIT

MODULATOR UNIT

LEFT-REAR

WHEEL SENSOR

RIGHT-FRONT

WHEEL SENSOR

UNDER-HOOD RELAY BOX C
UNDER-DASH FUSE/RELAY BOX

LEFT-FRONT WHEEL SENSOR

GAUGE ASSEMBLY
UNDER-HOOD FUSE/RELAY BOX

ABS INDICATOR

UNDER-DASH FUSE/RELAY BOX

R/C MIRROR

(7.5 A) FUSE

METER

(7.5 A) FUSE
STOP/HORN

(15 A) FUSE

ABS
UNIT

(7.5 A) FUSE

ABS

(20 A) FUSE
ABS PUMP

MOTOR RELAY

METER

(15 A) FUSE
BATTERY

(120 A) FUSE

ABS MOTOR

(40 A) FUSE

IG SW (50 A) FUSE

UNDER-HOOD RELAY BOX C

GAUGE RELAY

FAIL-SAFE RELAY
UNDER-HOOD FUSE/RELAY BOXProCarManuals.com

Troubleshooting
ABS Indicato r Doe s No t Com e O n
AB S indicato r doe s no t com e o nwhe n th e ignitio n switc h i sturne d O N (II) .
Chec k th e indicato r powe r
sourc e circuit :
Turn th e ignitio n switc h O N (II) .
Doe s th e brak e syste m indi -cato r com e on ?
Chec k th e AB S contro l unit :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e AB S contro lunit 12 P connector .3. Tur n th e ignitio n switc h O N (II) .
Doe s th e AB S indicato r
com e on ?
Is th e bul b OK ?
Chec k fo r a shor t t o bod y groun d
i n th e WAL P circuit :
1 . Disconnec t th e gaug e assem -
bl y 30 P connector .
2 . Chec k fo r continuit y betwee n
termina l No . 2 2 an d bod yground .
I s ther e continuity ?
(T o pag e 19-123 ) Gaug
e rela y stuc k OFF .
Blow n METE R (1 5 A ) fus e in th e
under-hoo d fuse/rela y box .
Blow n METE R (7. 5 A ) fus e i n
th e under-das h fuse/rela y box .
Repai r ope n in th e wir e betwee n
th e METE R (1 5 A ) fus e an d th e
gaug e assembly .
Repai r ope n i n th e wir e
betwee n th e METE R (7. 5 A )
fus e an d bod y ground .
Replac e th e under-hoo d fuse /
rela y bo x o r under-das h fuse /
rela y box . (Ope n circui t insid e
the box. )
Chec k fo r loos e AB S contro l uni t
connectors . I f necessary , substi -
tut e a known-goo d AB S contro l
uni t an d recheck .
Replac e th e AB S indicato r bulb .
GAUGE ASSEMBL Y 30 P CONNECTO R
Repai r shor t t o bod y groun d in th e
wir e betwee n th e gaug e assembl y
and th e AB S contro l unit .Wire sid e o f femal e terminal s
Chec
k th e AB S indicato r bul b i n
th e gaug e assembly .
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Troubleshooting
ABS Indicato r Doe s No t G o Of f (N o DTC )
Is th e fus e OK ?
Chec k fo r a n ope n i n th e GN D
circuit :
1. Connec t th e AB S contro l uni t22P connecto r termina l No . 1to bod y groun d wit h a jumpe rwire.2. Tur n th e ignitio n switc h O N (II) .
Doe s th e AB S indicato r g o off ?
Chec k fo r a n ope n in th e IG 2 cir -
cuit :Measur e th e voltag e betwee n th eAB S contro l uni t 22 P connecto rterminal No . 1 1 an d bod y ground .
Is ther e batter y voltage ?
Chec k th e AB S contro l unit :
Connec t th e AB S contro l uni t 12 Pconnecto r termina l No . 1 to bod ygroun d wit h a jumpe r wire .
Does th e AB S indicato r g o off ?
(T o pag e 19-125 ) Replac
e th e fus e an d recheck .
ABS CONTRO L UNI T 22 P CONNECTO R
Wir e sid e o f femal e terminal s
Repai r ope n in th e wir e betwee n
th e AB S contro l uni t an d bod y
ground .
Repai r poo r groun d (G404) .
Repai r ope n in th e wir e betwee n
th e R/ C MIRRO R (7. 5 A ) fus e an d
th e AB S contro l unit .
Chec k fo r loos e AB S contro l uni t
connectors . I f necessary , substi -
tut e a known-goo d AB S contro l
unit an d recheck .
Wire sid e o f femal e terminal s
AB
S CONTRO L UNI T 12 P CONNECTO R
JUMPE R
WIRE
JUMPE R
WIR E
With engin e running , th e AB Sindicato r i s ON .
Wit h th e SC S servic e connec -
to r connecte d (se e pag e
19-119 ), n o DT C is indicated .
Chec k th e R/ C MIRRO R (7. 5 A ) fus e
i n th e under-das h fuse/rela y box ,
an d reinstal l th e fus e if i t i s OK .
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