1996 ACURA RL KA9 Service Repair Manual

(From pag e 19-74 )
REAR FAIL-SAF E RELA Y CONNECTO R
Check fo r a shor t t o powe r i n th e
SOLENOI D circuit :
1 . Star t th e engine .
2 . Measur e th e voltag e betwee n
th e rea r fail-saf e rela y connec -
tor termina l No . 1 an d bod yground .
NOTE: Th e fail-saf e relay s ar e OF F whe n th eAB S indicato r ligh t i s kep t on .SOLENOI D(BLU/BLK )
Is ther e batter y voltage ? Repai
r shor t t o powe r i n th e wir e
betwee n th e rear fail-saf e rela y
an d modulato r unit .Termina l sid e o f femal e terminal s
Check fo r a shor t t o powe r i n th e
R-I N circuit :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e AB S contro l uni t
26 P connector .
3 . Star t th e engine .
4 . Measur e th e voltag e betwee n
terminal No . 3 an d bod y ground .
NOTE: Chec k wit h th e modulato r uni t U P
connecto r disconnected .
I s ther e batter y voltage ? Repai
r shor t t o powe r i n th e wir e
betwee n th e AB S contro l uni tand modulato r unit . Wir
e sid e o f femal e terminal s
Chec k fo r a shor t t o powe r i n th e
R-OU T circuit :
Measur e th e voltag e betwee n th e
AB S contro l uni t 26 P connecto rterminal No . 1 6 an d bod y ground .
I s ther e batter y voltage ? Repai
r shor t t o powe r i n th e wir e
betwee n th e AB S contro l uni t
an d modulato r 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
uni t an d recheck . AB
S CONTRO L UNI T 26 P CONNECTO R
ProCarManuals.com

Troubleshooting
DTC 7-1 : Right-fron t Solenoi d
During th e initia l diagnosis , afte r th e fail-saf e relay s ar e turne d on , an d durin g th e regula r diagnosis , th e AB S contro l uni t
monitor s th e voltag e fro m th e batter y fo r th e si x solenoid s (whe n th e AB S is no t functioning) . I f th e detectio n circui t fo r
th e right-fron t solenoi d detect s 0 V , th e AB S contro l uni t keep s th e AB S indicato r ligh t o n afte r th e engin e i s started . I t
turn s th e AB S indicato r ligh t o n agai n if i t detect s 0 V after th e ligh t goe s off .
Possibl e causes :
Open circui t i n th e right-fron t solenoi d driv e circuit s betwee n th e fron t fail-saf e rela y an d AB S contro l uni t
Shor t circui t t o bod y groun d i n th e right-fron t solenoi d driv e circuit s betwee n th e solenoid s an d AB S contro l uni t
Fault y right-fron t solenoi d driv e transisto r (ON ) i n th e AB S contro l uni t
Th e AB S contro l uni t momentaril y output s th e O N signa l t o eac h solenoi d (to o momentar y t o tur n th e solenoi d on ) durin g
th e initia l diagnosis , an d eac h tim e th e vehicl e is driven , t o chec k th e voltag e fro m th e batter y wit h th e detectio n circuit . I f
th e detectio n circui t fo r th e right-fron t solenoid s detect s batter y voltag e a t thi s time , th e AB S contro l uni t keep s th e AB S
indicato r ligh t on . I t turn s th e AB S indicato r ligh t o n agai n i f i t detect s batter y voltag e whe n th e vehicl e is driven .
Possibl e causes :
Short circui t t o powe r i n th e right-fron t solenoi d driv e circuit s betwee n th e solenoid s an d AB S contro l uni t
Fault y right-fron t solenoi d driv e transisto r (OFF ) i n th e AB S contro l uni t
Shor t circui t t o powe r i n th e right-fron t solenoi d driv e circuit s i n th e modulato r wir e harnes s o r solenoid s
Shor t circui t t o th e right-fron t solenoi d outle t circui t i n th e inle t circui t betwee n th e solenoi d an d AB S contro l uni t
Doe s th e AB S indicato r ligh t g ooff ?
Th e syste m is O K a t thi s time .Check th e wir e harnes s an d con -nector s betwee n th e AB S contro l
unit , fail-saf e rela y an d modulato r
unit (intermitten t ope n o r shor tcircuit) .
Is cod e 7- 1 indicated ?Perform th e appropriat e trouble -shootin g fo r th e code .
(To pag e 19-77 )
Confir m th e DT C tha t appear s first .
Proble m verification :Start th e engine .
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 7- 1 is indicated .
ProCarManuals.com

(From pag e 19-76 )
Chec k fo r a n ope n i n th e SOLE -
NOI D circuit :
1 . Remov e th e fron t fail-saf e
relay.2. Connec t th e fron t fail-saf e rela y
connecto r terminal s No . 1 an d
No . 2 usin g a jumpe r wire .
3 . Disconnec t th e modulato r uni t
14 P connector .
4 . Measur e th e voltag e betwee n
bod y groun d an d terminal s
No. 5 an d No . 8 individually .
Is ther e batter y voltage ?
:
is th e resistanc e a s specified ?Inlet: 2.5-2. 9 o r 6.5-7. 5Outlet: 2.5 - 2. 9 o r 3.3-3. 9
Check fo r a shor t t o bod y groun d
i n th e solenoid :
Chec k fo r continuit y betwee n
bod y groun d an d th e modulato r
unit 14 P connecto r terminal sNo. 1 an d No . 1 2 individually .
Is ther e continuity ?
(T o pag e 19-78 ) Repai
r ope n i n th e wire(s )
betwee n th e fron t fail-saf e rela y
an d modulato r unit .
NOTE :
Inlet Solenoi d
Outlet Solenoi d
STANDAR D RESISTANC E
A TYP E
2.5-2. 9
2.5-2.9
B TYP E
6.5-7. 5
3.3 - 3. 9
Termina l sid e o f mal e terminal s
Visuall y inspec t th e modulato r
wir e harness . I f th e harnes s i s
OK , replac e th e modulato r unit .
(Ope n o r shor t i n th e right-fron t
inle t o r outle t solenoid ) Wir
e sid e o f femal e terminal s
Visuall y inspec t th e modulato r
wir e harness . K th e harnes s is OK ,
replac e th e modulato r unit . (Shor t
t o bod y groun d i n th e right-fron t
inle t o r outle t solenoid ) FRON
T FAIL-SAF E RELA Y CONNECTO R
JUMPE R WIR E
Termina l sid e o f femal e terminal s
MODULATO R UNI T 14 P CONNECTO R
MODULATO R UNI T 14 P CONNECTO R
ProCarManuals.com