ACURA TL 1995 Service Repair Manual

DTC Indication Pattern (When the ABS control unit detected a problem three times.):

Turn the ignition

switch ON (II)

ABS

Indicator

light on

ABS

Indicator

light off
DTC:
4-2

Main Coda: 4

Sub-Code: 2

Connect the

SCS service

connector
2 Second Second

pause pause
5 Second

pause
1

Second

pause
5 Second

pause
1

Second

pause

2 Seconds

• Turn the ignition switch ON (II). The ABS indicator light comes on for two seconds to check the bulb.

• The ABS control unit indicates the DTC three times.

• If you miscount the blinking frequency or if you recheck the blinking frequency, turn the ignition switch OFF then

turn it ON (II) to cycle the ABS indicator light again.

4. Remove the SCS service connector.

NOTE: The Malfunction Indicator Lamp (MIL) will stay on after the engine is started if the SCS service connector is

connected.

5. Remove the ABS B2 (15 A) fuse in the under-hood fuse/relay box for at least three seconds to erase the ABS control

unit's memory.ProCarManuals.com

Diagnostic Troubleshootin g Cod e (DTC )
Symptom-to-Syste m Char t
ABS indicato r
ligh t doe s no t
com e o n whe n
ignitio n switc h
i s turne d O N III )
AB S indicato r
ligh t doe s no t
go of f afte rengin e is starte d(No DTC )
ABS pum p
moto r over-ru n
Pum p moto r
High-pressur eleakage
Pressur eswitch
High-pressur esystem
Parkin g brak e
O
O
O
O0
O
O
O
• Blow n BACK-U P LIGHTS/METE R LIGHT S (1 0 A ) fus e
• Ope n circui t betwee n th e BACK-U P LIGHTS/METE R LIGHT S (1 0 A ) fus e
an d AB S indicato r ligh t
• Blow n AB S indicato r ligh t bul b
• Ope n circui t betwee n th e AB S indicato r ligh t an d AB S contro l uni t
• Ope n circui t betwee n th e AB S contro l uni t an d bod y groun d
• Poo r bod y groun d
• Fault y AB S contro l uni t
• Blow n R/ C MIRROR/REA R DEFROSTE R RELA Y (7. 5 A ) fus e• Ope n circui t betwee n th e under-das h fuse/rela y bo x an d AB S contro lunit.• Ope n circui t betwee n th e batter y an d under-hoo d fuse/rela y bo x
• Blow n AB S B 2 (1 5 A ) fus e
• Ope n circui t insid e th e under-hoo d fuse/rela y bo x
• Ope n circui t betwee n th e under-hoo d fuse/rela y bo x an d AB S contro l
unit• Fault y alternato r• Ope n circui t betwee n th e alternato r an d AB S contro l uni t• Shor t t o bod y groun d i n th e WAR N circui t betwee n th e AB S indicato rlight an d AB S contro l uni t• Fault y AB S contro l uni t
• Ai r mixe d i n th e AB S brak e fluid .
• Pressur e switc h stuc k OF F
• Ope n circui t betwee n th e pressur e switc h an d AB S contro l uni t
• Ope n circui t i n th e P-S W circui t betwee n th e pressur e switc h an d bod y
ground , o r a poo r groun d
• Dro p in pum p discharg e volum e
• Leakin g outle t valv e
• Leakin g relie f valv e
• AB S brak e flui d leakag e
• Fault y AB S contro l uni t
• Ope n circui t o r shor t t o bod y groun d betwee n th e R/ C MIRROR/REA R
DEFROSTER RELA Y (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 i n 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
• Ope n circui t o r shor t t o bod y groun d i n 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 i n 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 i n 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
• Ope n circui t betwee n th e pum p moto r an d bod y groun d o r poo r groun d
• Fault y AB S contro l uni t
• Leakin g outle t valv e
• Leakin g relie f valv e
• Poo r contac t i n pressur e switc h circui t
• Shor t t o bod y groun d betwee n th e AB S contro l uni t an d pressur e switc h
• Pressure switch stuc k O N
• Fault y AB S contro l uni t
• Accumulato r ga s leakag e
• Change d relie f valv e se t pressur e
• Rea r outle t solenoi d valv e lat e t o clos e
• Change d pressur e switc h se t pressur e
• Lo w flui d leve l i n th e maste r cylinde r reservoi r
• Ope n circui t betwee n th e BACK-U P LIGHTS/METE R LIGHT S (1 0 A ) fus e
an d brak e syste m ligh t
• 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 dleve l switc h
• Fault y AB S contro l uni t
• Intermitten t interruptio n in th e MC Kcircui t• Intermitten t interruptio n in th e pum pmotor rela y driv e circui t• Intermitten t interruptio n i n th e pum pmotor driv e circui t
• Intermitten t interruptio n i n th e pressur e switc h• Intermitten t interruptio n i n th e pressur eswitch circui t
• Th e AB S indicato r ligh t ma ynot com e o n i n norma l climat e whe n i t
come s o n i n ver y col d climate .
• Drivin g wit h th e parkin g brak e
applie d — (No problem ) •
Th e AB S indicato r ligh t i s turne d o n whe n th e pum p moto r rela y O N signa l i s detect -
e d fo r mor e tha n 4 0 second s whil e th e AB S i s no t functioning .
• Th e AB S indicato r ligh t i s turne d o n whe n batter y voltag e is detecte d a t th e MC Ktermina l whil e th e pum p moto r rela y OF F signa l i s detected .• Th e AB S indicato r ligh t i s turne d o n whe n th e 0 V is detecte d a t th e MC K termina lwhile th e pum p moto r rela y O N signa l i s detected .
• Th e AB S indicato r ligh t i s turne d o n whe n th e frequen t ON/OF F cycl e o f th e pressur e
switc h signa l i s detecte d whil e th e engin e i s running . Th e coun t i s erase d whe n th e
AB S functions .
• Th e AB S indicato r ligh t i s turne d o n whe n th e pressur e switc h O N signa l i s alway s
detecte d a t ever y initia l diagnosis .
Th e coun t i s erase d whe n th e AB S contro l uni t detect s th e pressur e switc h OF F signal .
• Thi s diagnosi s i s performe d whe n th e pressur e switc h i s OF F a t th e initia l diagnosis .
Th e pum p moto r i s operate d t o tur n th e pressur e switc h ON , the n th e solenoi d valv e
i s momentaril y activated . Th e AB S indicato r ligh t i s turne d o n i f th e pressur e switc h
signa l change s fro m O N to OFF .
• Th e AB S indicato r ligh t i s turne d o n whe n th e parkin g brak e O N signa l i s detecte d fo r
mor e tha n 3 0 second s whil e driving .
19-16
19-1 8
19-2 1
19-2 3
19-2 9
19-3 1
19-3 2
19-3 3
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Diagnostic Troubleshootin g Cod e (DTC )
Symptom-to-Syste m Char t (cont'd )
Right-front
Left-fron t
Right -rear
Left -rear
Right -front
Left -
fron t
Right -rear
Left -rear
Right /Left
Righ t
Left
Front /rear
Fron t
Rear
Right -front
Left -
fron t
Rea r
• Chippe d pulse r gea r
• Improperl y installe d whee l senso r
• Differen t diamete r tir e installe d
• Ope n circuit , interna l shor t o r shor t t o bod y groun d i n th e whee l
sensor• Ope n circui t o r shor t t o bod y groun d i n th e positiv e ( + ) wir e be -
twee n th e whee l senso r an d AB S contro l uni t
• Ope n circui t o r shor t t o bod y groun d i n th e negativ e ( - ) wir e be -
twee n th e whee l senso r an d AB S contro l uni t
whee l senso r an d AB S contro l uni t
• Loos e connecto r o r poo r contac t o f terminal s
• Imprope r whee l senso r ai r ga p
• Fault y AB S contro l uni t
• Missin g pulse r
• Modulato r doe s no t decreas e pressur e properl y
• Ope n circuit , interna l shor t o r shor t t o bod y groun d i n th e whee l
senso r syste m
• Rea r brak e dra g• Modulato r doe s no t decreas e pressur e properl y
• Fault y AB S contro l uni t
• Shor t t o powe r i n th e rela y driv e circui t betwee n th e fail-saf e rela y
an d AB S contro l uni t
• Fault y rela y driv e transisto r (ON ) i n th e AB S contro l uni t
• Fail-saf e rela y stuc k O N
• Shor t t o powe r i n th e solenoi d driv e circuits betwee n th e fail-saf e
rela y an d AB S contro l uni t
• Fail-saf e rela y stuc k OF F
• Ope n circui t i n th e solenoi d driv e circui t betwee n th e under-hoo d
fuse/rela y bo x an d AB S contro l uni t
• Shor t t o bod y groun d i n th e solenoi d driv e circui t betwee n th e
solenoi d an d AB S contro l uni t
• Fault y solenoi d driv e transisto r (ON ) i n th e AB S contro l uni t
• Shor t t o powe r i n th e solenoi d driv e circui t betwee n th e solenoi d
an d AB S contro l uni t
• Fault y solenoi d driv e transisto r (OFF ) i n th e AB S contro l uni t
• Shor t t o powe r i n th e driv e circui t insid e th e solenoi d
• Shor t t o th e 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
• Whee l 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
• Faulty ABS contro l uni t
• Fault y AB S contro l uni t
• Intermitten t interruptio n i n th e whee lsensor
• (N o problem )
• Intermitten t interruptio n i n th e whee l
sensor• Whee l spi n o f bot h fron t wheel s (onl y
fo r DT C 4-8 ) — (No problem )
• Th e transmissio n downshifte d
excessivel y (onl y fo r DT C 4- 1 an d
4-2 ) -(N o problem )
• Intermitten t interruptio n i n th e whee l
sensor• Whee l spi n b y operatin g th e parkin g
brak e whil e th e parkin g brak e switc h
i s stuc k OF F
• Ca r spun-out — (N o problem )
• Intermitten t interruptio n i n th e sole -
noi d valv e driv e circui t
• Intermitten t interruptio n i n th e sole -
noi d valv e groun d circui t
• Intermitten t interruptio n i n th e fail -
saf e rela y circui t
• Intermitten t interruptio n i n th e whee l
sensor• Roug h roa d drivin g — (N o problem )
• (N o problem )
• (N o problem ) •
Th e AB S indicato r ligh t i s turne d o n whe n th e whee l senso r signa l i s periodicall y
missin g durin g driving .
• Th e AB S indicato r ligh t ma y b e turne d o n whil e drivin g whe n one , tw o o r thre e
differen t diamete r tire s ar e installed .
Thi s diagnosi s i s no t performe d whe n th e parkin g brak e switc h i s ON .
• Th e AB S indicato r ligh t i s turne d o n whe n th e whee l senso r signa l i s missin g a t
speed s o f 6 mp h (1 0 km/h ) o r more .
Thi s diagnosi s i s no t performe d whe n th e parkin g brak e switc h i s ON .
• Th e AB S indicato r ligh t i s turne d o n whe n eithe r o r bot h rea r wheel s loc k an d
th e whee l senso r signa l i s missin g durin g driving .
Thi s diagnosi s i s no t performe d whe n th e parkin g brak e switc h i s ON .
• Th e AB S indicato r ligh t i s turne d o n whe n batter y voltag e i s detecte d a t th e
solenoi d termina l befor e th e fail-saf e relay s ar e turne d o n a t th e initia l diagnosis .
• Eac h solenoi d valv e i s momentaril y activate d a t th e initia l diagnosi s an d whe n
th e ca r start s off . Th e AB S indicato r ligh t i s turne d o n whe n batter y voltag e i s
detecte d a t th e solenoi d terminal .
• Th e AB S indicato r ligh t i s turne d o n whe n 0 V is detecte d a t th e solenoi d termi -nal whil e th e solenoi d OF F signa l i s detecte d a t th e regula r diagnosis .
• Th e AB S indicato r ligh t i s turne d o n whe n th e AB S function s continuously .
• Th e AB S indicato r ligh t i s turne d o n whe n ther e i s a differenc e betwee n th e
CP U data .
• Th e AB S indicato r ligh t i s turne d o n whe n ther e i s a abnormalit y i n th e I C a t th e
regula r diagnosis .
19-37
19-3 7
19-3 8
19-4 1
19-4 2
19-4 4
19-4 7
19-4 9
19-5 3
19-5 9
19-6 6
19-6 7
19-6 7
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ABS Functio n Tes t
1. Rais e th e ca r 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 19-16 .
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 NCONNECTO 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 NStar t Tes t
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 i s on .
• 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 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 to 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
Test switch . Th e AB S indicato r ligh t shoul d no t com e
on 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 -
back 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 -
ing 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 modulato r 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 i s pushed .
Th e AB S can be checke d wit h a brak e tester , too , b y
checkin g th e brak e torqu e fluctuatio n o f th e whee l
controlle d b y th e ABS .
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 .
Mode Selecto r
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Operation Sequenc e Simulate d b y Mode s o f AL B Checke r
NOTE : Th e whee l sensor s an d senso r wir e harnesse s ar e no t checke d b y th e AL B checker .
Mode 1 : Send s th e simulate d drivin g signa l O mp h ( O km/h ) 11 3 mp h (18 0 km/h ) O mph ( O km/h ) o f eac h whee l t o th e
AB S contro l uni t t o chec k th e syste m unde r th e norma l driving . Ther e shoul d b e n o kickback .
SIMULATE D DRIVIN G SIGNA L
Mod e 2 : Send s th e drivin g signa l o f eac h wheel , the n send s th e loc k signa l o f th e left-rea r whee l t o th e AB S contro l uni t t o
chec k th e syste m unde r left-rea r whee l lock . Ther e shoul d b e kickback .
SIMULATE D DRIVIN G SIGNA L
Mod e 3 : Send s th e drivin g signa l o f eac h wheel , the n send s th e loc k signa l o f th e right-rea r whee l t o th e AB S contro l uni t
t o chec k th e syste m unde r right-rea r whee l lock . Ther e shoul d b e kickback .
SIMULATE D DRIVIN G SIGNA L
Mod e 4 : Send s th e drivin g signa l o f eac h wheel , the n send s th e loc k signa l o f th e left-fron t whee l t o th e AB S contro l uni t
t o chec k th e syste m unde r left-fron t whee l lock . Ther e shoul d b e kickback .
SIMULATE D DRIVIN G SIGNA L
Mod e 5 : Send s th e drivin g signa l o f eac h wheel , the n send s th e loc k signa l o f th e right-fron t whee l t o th e AB S contro l uni t
t o chec k th e syste m unde r right-fron t whee l lock . Ther e shoul d b e kickback .
SIMULATE D DRIVIN G SIGNA L
Inspectio n Point s
I f th e AB S indicato r ligh t come s o n an d th e syste m stop s during the inspection , confir m th e DT C an d perfor m th e appro -
priat e troubleshootin g fo r th e code .
I f ther e is n o kickbac k i n mode s 2 throug h 5 , an d th e AB S indicato r ligh t doe s no t com e on , th e followin g item s ar e proba -
bl e causes :
• Pressur e switc h stuc k O N
• Clogge d o r stuc k solenoi d outle t valv e
• Modulato r wir e harnes s connector s improperl y connecte d
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Master Cylinde r
Pushrod Clearanc e Adjustmen t
NOTE: Maste r cylinde r pushrod-t o pisto n clearanc e
mus t b e checke d an d adjustment s made , i f necessary ,
befor e installin g maste r cylinder .
1 . Se t th e specia l too l o n th e maste r cylinde r body ;
pus h i n th e cente r shaf t unti l th e to p o f i t contact s
th e en d o f th e secondar y pisto n b y turnin g th e
adjustin g nut .
NOTE : '9 6 mode l i s shown .
PUSHRO D ADJUSTMEN T GAUG E
07JAG-SD4010 0 ADJUSTIN
G NU T
MASTE R CYLINDE R
CENTERSHAFTSECONDAR YPISTON
2. Withou t disturbin g th e cente r shaft' s position ,
instal l th e specia l too l upsid e dow n o n th e booster .
3 . Instal l th e maste r cylinde r nut s an d tighte n t o th e
specifie d torque .
4 . Connec t th e booste r in-lin e wit h a vacuu m gaug e O
- 10 1 kP a (0-76 0 mmHg , 3 0 in Hg ) t o th e booster' s
engin e vacuu m supply , an d maintai n a n engin e
spee d tha t wil l delive r 6 6 kP a (50 0 mmHg , 2 0 in Hg )
vacuum .
5 . Wit h a feele r gauge , measur e th e clearanc e
betwee n th e gaug e bod y an d th e adjustin g nu t a s
shown .
Clearance : 0 - 0.2 m m (0 - 0.0 1 in )
VACUU M GAUG E
(Commerciall y available )
0 - 101 kP a(0 - 76 0 m m Hg , 3 0 in Hg )
ADJUSTIN GNUT
FEELE R GAUG EMASTE R CYLINDE R NU T
1 5 N- m (1. 5 kgf-m , 1 1 Ibf-ft )
NOTE : I f th e clearanc e betwee n th e gaug e bod y an d
adjustin g nu t i s 0. 2 m m (0.0 1 in) , th e pushrod-to -
pisto n clearanc e is 0 mm . However , i f th e clearanc e
betwee n th e gaug e bod y an d adjustin g nu t i s 0 mm ,
th e pushrod-to-pisto n clearanc e is 0. 2 m m (0.0 1 in )
o r more . Therefore , i t mus t b e adjuste d an d
rechecked .
6. I f th e clearanc e is incorrect , remov e th e specia l too l
an d adjus t th e clearanc e b y turnin g th e adjuste r i n
o r ou t whil e holdin g th e outpu t rod .
NOTE : Adjus t th e clearanc e whil e th e specifie d vac -
uu m is applie d t o th e booster .
0 -0. 2 m m (0-0.0 1 in )
ADJUSTE R
OUTPUT RO D
7. Adjus t th e pushro d lengt h a s show n i f th e booste r
i s removed .
116 m m(4.6 in)
8. Instal l th e maste r cylinde r (refe r t o th e '9 5 - 9 8
Acur a 2. 5 T L Servic e Manual , P/ N 61SW504) .
LOCKNUT15 N- m(1.5 kgf-m ,11 Ibf-ft )
CLEVI S
PUSHRO D
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Component Location s
RIGHT-REA R WHEE L SENSO R
SERVIC E CHEC K CONNECTO R <2P )
ABS CONTRO L UNI T
UNDER-DAS H RELA Y BO X
MODULATO R UNI T
RIGHT-FRON T WHEE L
SENSO R CONNECTO R
RIGHT-FRON T
WHEE L SENSO R
UNDER-HOO D
FUSE/RELA Y BO X
LEFT-REA RWHEEL SENSO R
WHEE L SENSO R CONNECTOR S
PARKIN G BRAK E SWITC H
LEF T FRON T WHEE L
SENSO R CONNECTO R UNDER-DAS
H FUSE/RELA Y BO X
LEFT-FRON T WHEE L SENSO R
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GAUGE ASSEMBL YUNDER-HOO D FUSE/RELA Y BO X
AB S INDICATO R LIGH T
UNDER-DAS H FUSE/RELA Y BO X
R/ C MIRROR /
REAR DEFROSTE RRELAY (7. 5 A ) FUS E
BACK-U P LIGHTS /
METE R LIGHT S
(1 0 A ) FUS E AB
S
UNI T(7.5 A ) FUS ESTOP/HOR
N
(2 0 A ) FUS E
BATTER Y(120 A ) FUS E
AB S B 1 (2 0 A ) FUS E AB
S MOTO R (4 0 A ) FUS E
I G S W (5 0 A ) FUS E
UNDER-DAS H RELA Y BO X
FAIL-SAF E RELA Y
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ABS Contro l Uni t Termina l Arrangemen t
ABS CONTRO L UNI T 22 P CONNECTO R
Wir e sid e o f femal e terminal s
VB: Batter y Voltag e
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VB: Batter y Voltag e
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