1996 ACURA RL KA9 Service Repair Manual

(From pag e 19-90 )
ABS CONTRO L UNI T 22 P CONNECTO R
Chec k fo r a n ope n in th e GN D cir -
cuit :1. Disconnec t th e AB S contro lunit 22 P connector .2. Chec k fo r continuit y betwee ntermina l No . 1 0 an d bod yground .
Is ther e continuity ? Repai
r ope n in th e wir e betwee n
th e AB S contro l uni t an d bod y
ground , o r poo r ground .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 FS R circuit :
1 . Remov e th e fron t fail-saf e
relay.2. Remov e th e jumpe r wir e fro m
th e rea r fail-saf e rela y connec -
tor.3. Chec k fo r continuit y betwee nthe AB S contro l uni t 22 P con -necto r termina l No . 1 an d bod yground .
Is ther e continuity ? Repai
r shor t t o bod y groun d i n
th e wir e betwee n th e AB S con -
tro l uni t an d rea r fail-saf e relay .
REAR FAIL-SAF E RELA Y CONNECTO R
Check fo r a n ope n in th e FS R cir -
cuit :
1 . Connec t th e rea r fail-saf e rela y
termina l No . 4 to bod y groun d
with a jumpe r wire .2. Chec k fo r continuit y betwee nthe AB S contro l uni t 22 P con -necto r termina l No . 1 an d
bod y ground . JUMPE
R
WIRE
Termina l sid e o f femal e terminal s
AB S CONTRO L UNI T 22 P CONNECTO R
Is ther e continuity ?Repair ope n in th e wir e betwee nthe AB S contro l uni t an d rea rfail-saf e relay .
Wire sid e o f femal e terminal s
(To pag e 19-92 )
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Troubleshooting
DTC 7-4 : Rea r Solenoi d (cont'd )
(From pag e 19-91 )
Chec k fo r a n ope n in th e GN D cir -
cuit :1. Remov e th e jumpe r wire fromthe rea r fail-saf e rela y connec -tor.2. Chec k fo r continuit y betwee nthe rea r fail-saf e rela y connec -tor termina l No . 3 an d bod yground .
REAR FAIL-SAF E RELA Y CONNECTO R
I s ther e continuity ?
Repair ope n in th e wir e betwee nthe rea r fail-saf e rela y an d bod yground , o r poo r ground .
Termina l sid e o f femal e terminal s
Check fo r loos e AB S contro l uni tconnectors . I f necessary , substi -tute a known-goo d AB S contro lunit an d recheck .
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DTC 8-1 : AB S Functio n
The AB S contro l uni t monitor s th e AB S functionin g tim e durin g regula r diagnosis , an d it turn s th e AB S indicato r ligh t o n if
th e AB S is functionin g fo r a prolonge d time .
Possibl e causes :
Wheel senso r signa l disappear s a t speed s o f 6 mp h (1 0 km/h ) o r les s
Fault y AB S contro l uni t
— 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 8- 1 is indicated .
Proble m verification :
Test-driv e th e vehicl e a t speed s
o f 1 2 mp h (2 0 km/h ) o r mor e fo r
mor e tha n 2 minutes .
Does th e AB S indicato r ligh tcom e on ? Th
e syste m is O K a t thi s time .
Chec k fo r loos e whee l senso r
connectors , an d chec k th e senso rinstallatio n (intermitten t trou -ble).Probabl e caus e wa s drivin g ove rroug h roads .
Is cod e 8- 1 indicated ? Perfor
m th e appropriat e trouble -
shootin g fo r th e code .
Replac e th e AB S contro l unit .
Confir
m th e DT C (se e pag e 19-40 ).
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Troubleshooting
DTC 8-2 : CPU , DT C 8-4:I C
DTC 8-2 : CPU
The AB S contro l uni t check s th e dat a o f th e tw o CPU s b y comparison , an d i t keep s th e AB S indicato r ligh t o n i f ther e ar e
an y difference s i n th e dat a betwee n th e CPUs . I t turn s th e AB S indicato r ligh t o n agai n i f i t detect s an y differenc e afte r th e
ligh t goe s off .
Doe s th e AB S indicato r ligh t
com e on ?
Is cod e 8- 2 indicated ?
The syste m is O K at thi s time .
Perfor m th e appropriat e trou -
bleshootin g fo r th e code .
DTC 8-4:I C (Integrate d Circuit )
Th e AB S contro l uni t check s th e interna l IC s durin g th e initia l diagnosi s an d regula r diagnosis , an d i t keep s th e AB S indicato r
ligh t o n if i t detect s an y abnormality . I t turn s th e AB S indicato r ligh t o n agai n if i t detect s any abnormalit y afte r th e ligh t goe s off .
Replac e th e AB S contro l uni t i f DT C 8- 4 is indicate d wit h th e SC S servic e connecto r connecte d (se e pag e 19-40 ).
Wit h engin e running , AB S indi -cato r ligh t i s ON .With th e SC S servic e connec -
to r connecte d (se e pag e 19-40 ),
DT C 8- 2 is indicated .
Problem verification :Start th e engine .
Confirm th e DT C (se e pag e 19-40 ).
Replac e th e AB S contro l unit .
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ABS Functio n Tes t
NOTE : Th e AB S syste m ca n b e checke d wit h th e AL B
checke r o r wit h th e Hond a PG M Tester .
1 . Rais e th e vehicl e of f th e ground , an d suppor t i t wit h
safet y stands .
2 . Chec k tha t ther e is n o brak e drag .
3 . Tur n th e ignitio n switc h O N (II) , an d confir m tha t th e
AB S indicato r ligh t come s on .
I f th e AB S indicato r ligh t doe s no t com e on , follo w
th e troubleshootin g o n pag e 19-43 .
4.Hond a PG M Tester : Connec t th e PG M Teste r a s
describe d i n th e PG M Teste r Anti-Loc k Brak e
Syste m (ABS ) Vehicl e Syste m Supplement . Follo w
th e tester' s prompt s instea d o f step s 5 throug h 1 1
o f thi s procedure .
AL B Checker : Wit h th e ignitio n switc h OFF , discon -
nec t th e AB S inspectio n connecto r (6P ) fro m th e
connecto r cove r locate d unde r th e glov e box , an d
connec t i t t o th e AL B checker . Continu e wit h step s 5
throug h 1 1 o f thi s procedure .
ALB CHECKE R07HAJ-SG0010 B
ABS INSPECTIO N
CONNECTO R (6P )
5. Shif t th e transmissio n t o position .
6 . Star t th e engin e an d releas e th e parkin g brake . 7
. Tur n th e Mod e Selecto r switc h t o "1" .
Monito r Light s
Powe r O N Star t Tes t Mod e Selecto r
8. Pus h th e Star t Tes t switch . Th e AB S indicato r ligh t
shoul d no t com e o n whil e th e Tes t i n Progres s ligh t
is on .
If th e AB S indicato r ligh t come s on , confir m th e DT C
an d perfor m th e appropriat e troubleshootin g fo r th e
code .
NOTE : D o no t tur n th e Mod e Selecto r switc h whe n
th e Tes t i n Progres s ligh t i s on . Damag e t o th e AL B
checke r ca n result .
9 . Tur n th e Mod e Selecto r switc h t o "2" .
10 . Depres s th e brak e peda l firmly , an d pus h th e Star t
Tes t switch . Th e AB S indicato r ligh t shoul d no t com e
o n whil e th e Tes t i n Progres s ligh t i s on . Ther e
shoul d b e kickbac k o n th e brak e pedal .
Hav e th e assistan t chec k tha t th e whee l controlle d b y
th e AB S ca n b e rotate d b y han d whe n ther e is kick -
bac k o n th e brak e pedal .
• I f th e AB S indicato r ligh t come s on , confir m th e
DT C an d perfor m th e appropriat e troubleshoot -
in g fo r th e code .
• I f th e AB S indicato r ligh t doe s no t com e o n an d
th e whee l controlle d b y th e AB S canno t b e rotat -
ed , chec k th e connectio n o f th e modulato r wir e
harnes s connectors . I f th e connection s ar e OK ,
replac e th e modulator unit.
NOTE : Th e kickbac k shoul d occu r approximatel y 2 0
second s afte r th e Star t Tes t switc h is pushed .
11 . Tur n th e Mod e Selecto r switc h t o "3" , "4 " an d "5" .
Perfor m ste p 1 0 fo r eac h o f th e tes t mod e positions .
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