1995 ACURA TL Service Repair Manual

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
stand s (se e sectio n 1 ).
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 19-60 .
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 BSee pag e 19-34 for othe r applicabl e checkers .
AB S INSPECTIO N
CONNECTO R (6P )
5. Shif t th e transmissio n t o [P ] 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
Power O N Star t Tes t Mod e Selecto r8. 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
the 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
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 i s 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 rotated ,
chec k th e connectio n o f th e modulato r wir e har -
nes 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 is pushed .
Th e AB S ca n b e 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 .
ProCarManuals.com

Operation Sequence Simulated by Modes of ALB Checker

NOTE: The wheel sensors and sensor wire harnesses are not checked by the ALB checker.

Mode 1: Sends the simulated driving signal O mph (O km/h) 113 mph (180 km/h) O mph (O km/h) of each wheel to the

ABS control unit to check the system under the normal driving. There should be no kickback.

SIMULATED DRIVING SIGNAL
LEFT-FRONT
RIGHT-FRONT

LEFT-REAR
RIGHT-REAR

Mode 2: Sends the driving signal of each wheel, then sends the lock signal of the left-rear wheel to the ABS control unit to

check the system under left-rear wheel lock. There should be kickback.

SIMULATED DRIVING SIGNAL
LEFT-FRONT
RIGHT-FRONT
LEFT-REAR

RIGHT-REAR

Mode 3: Sends the driving signal of each wheel, then sends the lock signal of the right-rear wheel to the ABS control unit

to check the system under right-rear wheel lock. There should be kickback.

SIMULATED DRIVING SIGNAL
LEFT-FRONT

RIGHT-FRONT
LEFT-REAR
RIGHT-REAR

Mode 4: Sends the driving signal of each wheel, then sends the lock signal of the left-front wheel to the ABS control unit

to check the system under left-front wheel lock. There should be kickback.

SIMULATED DRIVING SIGNAL
LEFT-FRONT
RIGHT-FRONT

LEFT-REAR
RIGHT-REAR

Mode 5: Sends the driving signal of each wheel, then sends the lock signal of the right-front wheel to the ABS control unit

to check the system under right-front wheel lock. There should be kickback.

SIMULATED DRIVING SIGNAL

Inspection Points

If the ABS indicator light comes on and the system stops during the inspection, confirm the DTC and perform the appro-

priate troubleshooting for the code.

If there is no kickback in modes 2 through 5, and the ABS indicator light does not come on, the following items are proba-

ble causes:

Pressure switch stuck ON

Clogged or stuck solenoid outlet valve

Modulator wire harness connectors improperly connectedProCarManuals.com

ABS Functio n Tes t
Modulato r Functio n Chec k
NOTE : Thi s inspectio n determine s whethe r th e basi c
brake syste m continue s t o operat e normall y whe n th e
modulato r uni t flui d pressur e i s low .
CAUTION :
Thi s inspectio n i s mad e b y relievin g th e high-pres -
sur e flui d i n th e modulato r uni t an d checkin g fo r
brak e operation . Afte r inspection , b e sur e t o ad d
fres h brak e flui d t o th e specifie d leve l o f th e reser -
voir , an d star t th e engin e t o restor e th e AB S t o it s
norma l operatin g condition .
D o no t spil l brak e flui d o n th e car ; i t ma y damag e th e
paint ; i f brak e flui d doe s contac t th e paint , was h i t
of f immediatel y wit h water .
D o no t reus e th e draine d brak e fluid .
D o no t loose n th e relie f plu g o n th e accumulator .
1.Remov e th e bleede r ca p fro m th e maintenanc e
bleede r o n th e modulato r unit .
BLEEDE R CA P
RUBBE R TUB EMODULATO R UNI T
MAINTENANC E BLEEDE R11 N- m (1. 1 kgf-m , 8 Ibf-ft )
2. Attac h a wrenc h t o th e maintenanc e bleeder .
3 . Connec t a rubbe r tub e o f th e appropriat e diamete r
t o th e maintenanc e bleeder , an d se t th e othe r en d o f
th e rubbe r tub e in a suitabl e container .
4 . Whil e holdin g th e rubbe r tub e wit h you r hand , slowl y
loose n th e maintenanc e bleede r 1/ 8 to 1/ 4 tur n t o col -
lec t th e brak e flui d in th e container .
CAUTION : D o no t loose n th e maintenanc e bleede r
to o much . Th e high-pressur e brak e flui d ca n burs t out .
5 . Afte r th e brak e flui d stop s flowin g out , loose n th e
maintenanc e bleede r mor e t o releas e th e pressur e
completely .
6 . Tighte n th e maintenanc e bleede r t o th e specifie d
torque .
7. Rais e th e ca r of f th e ground , an d suppor t i t wit h
safet y stand s (se e sectio n 1 ).
8 .Hav e a n assistan t depres s th e brak e peda l firmly ,
an d chec k tha t th e wheel s d o no t rotate .
9 . Remov e th e cap , an d refil l th e reservoi r t o th e MA X
(upper ) leve l wit h fres h brak e fluid .
NOTE : Pou r th e brak e flui d slowl y s o tha t i t doe s
no t foam , an d wai t fo r a fe w minutes .
10 . Star t th e engin e an d le t i t idl e fo r a minute . Sto p th e
engine .
11 . Chec k th e brak e flui d leve l i n th e reservoir . I t shoul d
b e belo w th e MA X (upper ) leve l line . Refil l th e
reservoi r wit h fres h brak e flui d t o th e MA X leve l lin e
again .
CAPRESERVOI R
MAX (UPPER ) LEVE RLINE
MIN (LOWER )LEVEL LIN E
12. Afte r inspection , star t th e engin e an d mak e sur e
tha t th e AB S indicato r ligh t goe s off .
ProCarManuals.com

Modulator Uni t
Relievin g Syste m Pressur e
CAUTION :
Be sur e t o drai n th e high-pressur e brak e flui d com -
pletel y befor e performin g th e modulato r functio n
check, disposin g th e modulato r unit, accumulato r
and AB S pum p moto r replacement .
D o no t spil l brak e flui d o n th e car ; i t ma y damag e th e
paint ; i f brak e flui d doe s contac t th e
paint , wash i t
of f immediatel y wit h water .
Do no t reus e th e draine d brak e fluid .
D o no t loose n th e relie f plu g o n th e accumulator .
1 . Remov e th e bleede r ca p fro m th e maintenanc e
bleeder o n th e modulato r unit .
RUBBE R TUB E
BLEEDE R CA P
MODULATOR UNIT
MAINTENANC E BLEEDE R11 N-m(1. 1 kgf-m, 8 Ibf-ft)
2. Attac h a wrenc h t o th e maintenanc e bleeder .
3 . Connec t a rubbe r tub e o f th e appropriat e diamete r
t o th e maintenanc e bleeder , an d se t th e othe r en d
o f th e rubbe r tub e in a suitabl e container .
4 . Whil e holdin g th e rubbe r tub e wit h you r hand , slowl y
loosen th e maintenanc e bleede r 1/ 8 to 1/ 4 tur n to col -
lect th e brak e flui d in th e container .
CAUTION : D o no t loose n th e maintenanc e bleede r
to o much . Th e high-pressur e brak e flui d ca n burs t out .
5 . Tighte n th e maintenanc e bleede r t o th e specifie d
torque .
ProCarManuals.com

Modulator Uni t
Brak e Flui d Replacement/Bleedin g
CAUTION:
• D o no t loose n th e relie f plu g o n th e accumulator .
NOTE : Brak e flui d replacemen t procedur e explaine d i n
thi s sectio n i s fo r th e brak e flui d in th e modulato r uni t
(tha t is , th e brak e flui d i n th e high-pressur e passag e an d
in th e reservoir) . Se e pag e 19-7 fo r th e brak e flui d
replacemen t procedure s fo r th e res t o f th e brak e system .
1.Remov e th e bleede r ca p fro m th e maintenanc e
bleeder o n th e modulato r unit .
BLEEDE R CA P
RUBBE R TUB EMODULATO R UNI T
MAINTENANC E BLEEDE R11 N- m (1. 1 kg f m , 8 Ibf-ft )
2. Attach a wrenc h t o th e maintenanc e bleeder .
3 . Connec t a rubbe r tub e o f th e appropriat e diamete r
t o th e maintenanc e bleeder , an d se t th e othe r en d
of th e rubbe r tub e in a suitabl e container .
4. Whil e holdin g th e rubbe r tub e wit h you r hand , slowl y
loose n th e maintenanc e bleede r 1/ 8 t o 1/ 4 t o collec t
th e brak e flui d in th e container .
CAUTION : D o no t loose n th e maintenanc e bleede r
to o much . Th e high-pressur e brak e flui d ca n burs t out .
5. Tighte n th e maintenanc e bleeder .
NOTE: D o no t remov e th e rubbe r tub e an d wrenc h
yet.
ProCarManuals.com

Modulator Uni t
Brak e Flui d Replacement/Bleedin g (cont'd )
6. Star t th e engin e an d le t i t idl e fo r a minute . Sto p th e
engine .
7 . Chec k th e brak e flui d leve l i n th e reservoir . I t shoul d
b e belo w th e MA X (upper ) leve l line .
8 . Repea t th e step s 4 throug h 7 to drai n th e res t o f th e
brak e flui d fro m th e modulato r unit .
NOTE : Th e modulato r ha s a capacit y o f approximatel y
150 ( 5 fl-oz , 5. 3 Imp-oz) . Approximatel y 3 5 - 4 5
(1 1/6- 1 1/ 2 fl-oz , 1.2-1. 6 Imp-oz ) o f th e flui d i s
draine d a t eac h try .
9 . Remov e th e cap , an d refil l th e reservoi r t o th e MA X
(upper ) leve l wit h fres h brak e fluid .
NOTE : Pou r th e brak e flui d slowl y s o tha t i t doe s no t
foam , an d wai t fo r a fe w minutes .
10.
CA P
MA X (UPPER ) LEVE LLINE
Repea t step s 4 throug h 7 twice , an d refil l th e reser -
voi r t o th e MA X (upper ) leve l wit h fres h brak e fluid .
11 . Tighten the maintenanc e bleede r t o th e specifie d
torque .
12 . Afte r replacement , star t th e engin e an d mak e sur e
tha t th e AB S indicator light goe s off .
Bleeding :
NOTE: Th e AB S ca n als o b e ble d b y usin g th e PG M
Teste r an d th e AB S Diagnosti c Ki t t o ru n th e AB S pump .
Connec t th e teste r an d modul e A as describe d i n th e
PG M Teste r Anti-Loc k Brak e Syste m (ABS ) Vehicl e
Syste m Supplement , the n follo w th e tester' s prompt s
instea d o f thi s procedure .
Whe n th e brak e flui d i s completel y draine d fro m th e
reservoi r (ai r enter s i n th e modulato r unit ) durin g brak e
fluid replacement , blee d th e ai r fro m th e modulato r uni t
as follows .
1 . Fil l th e reservoi r t o th e MA X (upper ) leve l wit h fres h
brak e fluid .
2 . Connec t th e rubbe r tub e t o th e bleede r o n th e mod -
ulato r unit , an d se t th e othe r en d o f th e rubbe r tub e
i n a containe r (se e page 19-115 ).
3 . Loose n th e bleeder , an d star t th e engin e t o activat e
th e pum p motor .
NOTE : Tak e car e no t t o spil l th e brak e flui d fro m
th e container .
4 . Tighte n th e bleede r whe n th e flui d start s t o flo w ou t
o f th e bleeder .
5 . Sto p th e engin e afte r th e pum p moto r stop s
NOTE : I f th e AB S indicato r ligh t come s o n an d th e
pum p moto r stops , restar t th e engin e an d repea t
step s 3 throug h 5 above .
ProCarManuals.com

Removal/Installation
Removal:
Whe n removin g th e modulato r uni t o r afte r removin g
it , b e carefu l no t t o tur n it upside-dow n o r lea n if exces -
sively .
D o no t spil l brak e flui d o n th e car ; i t ma y damag e th e
paint ; i f brak e flui d doe s contac t th e paint , was h i t of f
immediatel y wit h water .
Take car e no t t o damag e o r defor m th e brak e line s
durin g remova l an d installation .
T o preven t th e brak e flui d fro m flowing , plu g an d
cove r th e hos e end s an d joint s wit h a sho p towe l o r
equivalen t material .
D o no t loose n th e relie f plu g o n th e accumulator .
MODULATOR UNI T14P CONNECTO R
1. Disconnec t th e modulato r uni t 14 P connecto r an d
pum p moto r 2 P connector .
2 . Remov e th e wir e harnes s cli p fro m th e modulato r
bracket.
NOTE: Whe n a ne w harnes s cli p is installe d afte r a
wir e harnes s o r modulato r uni t replacement , adjus t
th e harnes s cli p t o th e dimension s show n below .
3 . Remov e th e thre e 8 m m nuts , an d remov e th e modu -
lato r uni t fro m th e bracket .
NOTE : Whe n th e pum p motor , accumulato r o r th e
modulato r uni t i s replaced , blee d th e high-pressur e
brak e flui d firs t (se e pag e 19-115 ).
14 5 - 15 5 mm (5.7 1 - 6.10 in)
PUM P MOTO R2P CONNECTO R
WIRE HARNES S CLI PNOTE : Whe n a ne w cli p is installed ,adjust it t o th e dimension s a s shown .
UNDER-HOO D AB S FUSE /RELAY BO X
MODULATO R BRACKE T
8 m m NU T21 N- m (2. 1 kgf-m , 1 5 Ibf-ft )
MOUN T RUBBE R
MODULATO R UNI T
225 - 23 5 mm (8.8 6 - 9.25 in)
ProCarManuals.com

Modulator Uni t
Removal/Installatio n (cont'd )
Installation :
1 . Chec k whethe r th e brak e flui d leve l i n th e reservoi r
i s a t th e MA X (upper ) lever . I f leve l i s low , ad d fres h
brak e flui d t o th e MA X (upper ) level .
CAP
MA X (UPPER ) LEVE L
LIN E
2. Befor e installin g th e modulato r uni t o n th e car , b e
sur e t o blee d th e ai r fro m th e suctio n por t i n th e
modulato r uni t b y leanin g th e modulato r uni t t o on e
sid e slowl y (abou t 4 5 degrees ) a s shown .
RESERVOI R
SUCTION POR T
Abou t 4 5 degree s
MODULATO R UNI T
CAUTION : Whe n installin g th e modulato r unit , b e
carefu l no t t o tur n i t upside-dow n o r lea n i f exces -
sively.
3. Instal l th e modulato r uni t i n th e revers e orde r o f
removal .
NOTE : Chec k th e letter s stampe d o n th e modulato r
body , an d connec t th e brak e pipe s properly .
Tighte n th e flar e nut s t o 1 9 N- m (1. 9 kgf-m , 1 4 Ibf-ft) .
Connec t th e lin e Connec t th e lin e Connec t th e lin e
fro m th e right-rea r fro m th e left-rea r fro m th e right-fron t
whee l t o "RR" . whee l t o "RL" . whee l t o "FR" .
Connec t th e lin e
fro m th e left-fron t
wheel t o "FL" .
MODULATO R UNI T
Lin e fro m th e Lin e fro m th e
maste r cylinde r maste r cylinde r
secondar y sid e primar y sid e
4. Star t th e engine and le t i t idl e fo r a minute .
Chec k that :
ABS indicato r ligh t i s off .
Brak e flui d i s no t leakin g fro m th e brak e pip e
joints .
5. Sto p th e engine .
6 . Chec k whethe r th e brak e flui d leve l i n th e reservoi r
i s a t th e MA X (upper ) level . I f leve l i s low , ad d fres h
flui d unti l th e reservoi r i s refille d t o th e MA X (upper )
level.
7. Blee d ai r fro m th e brak e syste m (se e pag e 19-7 ).
8 . Chec k th e AB S functio n usin g th e AL B checke r (se e
pag e 19-112 ).
ProCarManuals.com