1996 ACURA RL KA9 Service Repair Manual

DTC 1-8 : High-Pressur e Syste m
When th e AB S contro l uni t detect s th e pressur e switc h OF F signa l durin g th e initia l diagnosis , i t drive s th e AB S pum p moto r
until th e pressur e switc h turn s ON . Then , i t momentaril y activate s th e outle t solenoi d valv e an d monitor s th e pressur e switc h
signal . Th e AB S contro l uni t keep s th e AB S indicato r ligh t o n if i t detect s th e pressur e switc h OF F signa l a t thi s time .
Possibl e causes :
Accumulato r ga s leakag e
Change d relie f valv e se t pressur e
Rear outle t solenoi d valv e lat e t o clos e
Change d pressur e switc h se t pressur e
RELIEF PLU G
ACCUMULATO R
Is th e plu g OK ?Replac e th e accumulator .
Proble m verification :
Star t th e engin e an d allo w it t o ru n
unti l th e AB S indicato r ligh t goe soff, the n sto p th e engine .
Repea t thi s procedur e 1 0 times . NOTE
: I f ther e i s a problem , th e AB S pum p
moto r shoul d operat e th e secon d o r thir d tim e
yo u star t th e engine . Th e AB S pum p moto r
operate s fo r a shor t time .
Doe s th e AB S indicato r ligh t g o of f
eac h tim e th e engin e is started ? Intermitten
t failure , th e syste m is
O K a t thi s time .
Confir m th e DT C (se e pag e 19-40 ).
I s cod e 1- 8 indicated ? Perfor
m th e appropriat e trou -
bleshootin g flowchar t fo r th e
code .
Replac e th e accumulator .
(Accumulato r ga s leakage )
Replac e th e modulato r uni t i f th e
sympto m appear s again .
Relie f valv e se t pressur e
ou t o f spec .
Rea r outle t solenoi d valv e
lat e to close .
Pressur e switc h se t pres -
sure ou t o f spec .
NOTE : A norma l accumulato r wil l discharg e35 - 4 5 (1. 3 - 1. 7 fl-oz , 1.2-1. 6 Imp-oz ) o f
flui d whe n yo u reliv e syste m pressure .
Wit
h engin e running , AB S indi -
cato r ligh t i s ON .
Wit h th e SC S servic e connec -
to r connecte d (se e pag e 19-40 ),
DT C 1- 8 is indicated .
Chec k th e accumulato r relie f plug .
ProCarManuals.com

Troubleshooting
DTC 2-1 : Parkin g Brak e
The AB S contro l uni t monitor s th e parkin g brak e signa l durin g th e regula r diagnosi s (durin g driving) .
I t turn s th e AB S indicato r ligh t o n if i t detect s th e parkin g brak e O N signa l fo r 3 0 seconds .
Possibl e causes :
Drivin g wit h th e parkin g brak e applie d
Lo w flui d leve l i n th e maste r cylinde r reservoi r
Blow n brak e syste m ligh t bul b
Ope n circui t o r shor t t o bod y groun d betwee n th e brak e syste m ligh t an d AB S contro l uni t
Parkin g brak e switc h stuc k O N
Shor t t o bod y groun d betwee n th e brak e syste m ligh t an d parkin g brak e switc h
Brak e flui d leve l switc h stuc k O N
Shor t t o bod y groun d betwee n th e brak e syste m ligh t an d brak e flui d leve l switc h
Faulty AB S contro l uni t
Doe s th e brak e syste m ligh t
com e on ?
Chec k fo r a n ope n in th e IG 1 cir -
cuit :
1 . Disconnec t th e gaug e assem -
bl y 22 P connector .
2 . Measur e th e voltag e betwee n
terminal No . 2 2 an d bod yground .
Is ther e batter y voltage ?
Chec k th e brak e syste m ligh t bulb .
Is th e bul b OK ?
(To pag e 19-61 ) (T
o pag e 19-62 ) GAUG
E ASSEMBL Y 22 P CONNECTO R
Mete r rela y stuc k OFF .
Repai r ope n in th e wir e betwee n
th e METE R (1 5 A ) fus e i n th e
under-hoo d fuse/rela y bo x an d
gaug e assembly .
Repai r ope n i n th e wir e be -
twee n th e METE R (7. 5 A ) fus e
i n th e under-das h fuse/rela y
bo x an d bod y ground .
Replac e th e brak e syste m ligh t
bulb .
With engin e running , AB S indi -cato r ligh t i s ON .
Wit h th e SC S servic e connec -
to r connecte d (se e pag e 19-40 ),
DT C 2- 1 i s indicated .
Chec k th e brak e syste m ligh t
powe r source :
1. Tur n th e ignitio n switc h O N (II) .2. Pres s th e parkin g brak e pedal .
Wire sid e o f femal e terminal s
ProCarManuals.com

(From pag e 19-60 )
Chec k th e gaug e assembly :
1 . Connec t th e gaug e assembl y
22 P connector .
2 . Connec t th e gaug e assembl y
30 P connecto r termina l No . 5
to bod y groun d wit h a jumpe rwire.
GAUG E ASSEMBL Y 30 P CONNECTO R
JUMPE R WIR E
Wire sid e o f femal e terminal s
Doe s th e brak e syste m ligh t
com e on ? Replac
e th e printe d circui t boar d
i n th e gaug e assembly .
Repai r ope n i n th e wir e betwee n
th e gaug e assembl y an d parkin g
brak e switch .
ProCarManuals.com