brake ACURA RL KA9 1996 Service Workshop Manual

7. Remove the brake shoe by disconnecting the park-

ing brake cable from the parking brake lever.

PARKING BRAKE LEVER

PARKING BRAKE CABLE

8. Remove the wave washer, parking brake lever, and

pivot pin from the parking brake shoe by removing

the U-clip.

PARKING BRAKE SHOE
PIVOT PIN

PARKING BRAKE LEVER

U-CLIP WAVE WASHER

Replace.
9. Apply Molykote 44 MA grease to the sliding surface

of the pivot pin, and insert the pin into the parking

brake shoe.

10. Install the parking brake lever and wave washer on

the pivot pin, and secure them with a new U-clip.

NOTE: Pinch the new U-clip securely to prevent the

pivot pin from coming out of the parking brake shoe.

: Apply Molykote 44 MA grease

to sliding surface.

PARKING BRAKE SHOE

PIVOT PIN

PARKING BRAKE LEVER

WAVE WASHER

U-CLIP

Replace.

11. Connect the parking brake cable to the parking brake

lever.

PARKING BRAKE LEVER

PARKING BRAKE CABLEProCarManuals.com

Parking Brake

Parking Brake Shoes Replacement (cont'd)

12. Apply Molykote 44 MA grease on each sliding sur-

face.

CAUTION: Contaminated brake linings or drums

reduce stopping ability. Keep grease or oil off the

brake linings. Wipe any excess grease off the parts.

PIVOT PIN

BACKING PLATE

Greasing symbols:

Brake shoe ends

Opposite the edge of the shoe

Sliding surface

13. Clean the threaded portions of clevises A and B.

Coat the threads of the clevises with Molykote 44 MA

grease. To shorten the clevises, turn the adjuster bolt.

LOWER RETURN SPRING

ADJUSTER ASSEMBLY

14. Install the adjuster assembly, and the lower return

spring on the parking brake shoes.
15. Connect the rod spring to the connecting rod and

parking brake shoe as shown.

NOTE: Hook the rod spring to the connecting rod

with the spring end pointing downward.

ROD SPRING

SPRING END

CONNECTING ROD

16. Install the tension pins and retainer springs.

TENSION PINS

RETAINER SPRING

Install securely on

tension pin.
CLEVIS B
CLEVIS A

Apply Molykote 44 MA grease

to sliding surface.ProCarManuals.com

Brake Hoses/Lines

Inspection/Torque Specifications

1. Inspect the brake hoses for damage, deterioration, leaks, interference, and twisting.

2. Check the brake lines for damage, rusting, and leakage. Also check for bent brake lines.

3. Check for leaks at hose and line joints and connections, and retighten if necessary.

4. Check the master cylinder and ABS modulator unit ('00 - 01 models, VSA modulator unit and pump) for damage and

leakage.

CAUTION: Replace the brake hose clip whenever the brake hose is serviced.

'00 - 01 models (VSA):

BRAKE LINE-to-MODULATOR UNIT

15 N-m (1.5 kgf-m, 11 Ibf-ft)
MASTER CYLINDER-to-BRAKE LINE

15 N-m (1.5 kgf-m, 11 Ibf-ft)

BRAKE LINE-to-PUMP

15 N-m (1.5 kgf-m, 11 Ibf-ft)

BRAKE LINE-to-BRAKE HOSE

15 N-m (1.5 kgf-m, 11 Ibf-ft)

MASTER CYLINDER-to-BRAKE LINE

15 N-m (1.5 kgf-m, 11 Ibf-ft)

'96 - 99 models:

BRAKE LINE-to-MODULATOR UNIT

15 N-m (1.5 kgf-m, 11 Ibf-ft)
BRAKE HOSE-to-CALIPER

(BANJO BOLT)

34 N-m (3.5 kgf-m, 25 Ibf-ft)

BLEED SCREW

9 N-m (0.9 kgf-m, 6.5 Ibf-ft)

BRAKE HOSE-to-CALIPER

(BANJO BOLT)

34 N-m (3.5 kgf-m, 25 Ibf-ft)

BLEED SCREW

9 N-m (0.9 kgf-m, 6.5 Ibf-ft)
BRAKE LINE-to-BRAKE HOSE

15 N-m (1.5 kgf-m, 11 Ibf-ft)

PROPORTIONING CONTROL VALVE-to-

BRAKE LINE

15 N-m (1.5 kgf-m, 11 Ibf-ft)ProCarManuals.com

Hose Replacemen t
CAUTION:
Befor e reassembling , chec k tha t al l part s ar e fre e o f
dus t an d othe r foreig n particles .
Replace part s wit h ne w one s wheneve r specifie d t o
do so .
Do no t spil l brak e flui d o n th e vehicle ; i t ma y damag e
th e paint ; i f brak e flui d doe s contac t th e paint , was h
it of f immediatel y wit h water .
1. Replac e th e brak e hos e if th e hos e is twisted , cracked ,
o r i f i t leaks .
2 . Disconnec t th e brak e hos e fro m th e brak e lin e usin g
a 1 0 m m flar e nu t wrench .
BRAKE LIN EFLAR E NU TWRENC H
BRAKE HOS E
3. Remov e an d discar d th e brak e hos e cli p fro m th e
brak e hose .
BRAK E HOS E CU PReplace .
BRAKE HOS E MOUNTIN G
BOL T (8 mm )
BRAK E HOS EMOUNTIN G BOL TBRAK E HOS E
BANJ O BOL T
4. Remov e th e banj o bolt , an d disconnec t th e brak e
hos e fro m th e caliper . 5
. Instal l th e brak e hos e o n th e knuckl e an d dampe r
first, the n connec t th e brak e hos e to th e calipe r wit h
the banj o bol t an d ne w sealin g washers .
BRAKE HOS E MOUNTIN GBOLT9.8 N- m (1. 0 kgf-m , 7 Ibf-ft )
BRAK E HOS E
BRAK E HOS E MOUNTIN GBOLT ( 8 mm )22 N- m(2.2 kgf-m , 1 6 Ibf-ft )
BANJ O BOL T
34 N- m(3.5 kgf-m , 2 5 Ibf-ft )
SEALIN G WASHER S
Replace.
6. Instal l a ne w brak e hos e cli p o n th e brak e hose .
15 N- m(1.5 kgf-m , 1 1 Ibf-ft )
BRAK E HOS E CLI PReplace .
7. Connec t th e brak e lin e t o th e brak e hose .
8 . Afte r installin g th e brak e hose , blee d th e brak e sys -
te m (se e pag e 19-8 ).
9 . D o th e followin g checks :
Check th e brak e hos e an d lin e join t fo r leaks , an d
tighte n if necessary .
Check th e brak e hose s fo r interferenc e an d twist -
ing.
ProCarManuals.com

Troubleshooting Precautions

ABS Indicator Light:

The ABS indicator light comes on for 3 seconds and then goes off when the control unit detects no problem during the ini-

tial diagnosis right after the engine starts. However, the ABS indicator light can stay on for up to 40 seconds when the

control unit starts to check for pump overrun, etc. during the initial diagnosis. The ABS indicator light comes on, and the

ABS control unit memorizes the diagnostic trouble code (DTC) under certain conditions.

The parking brake is applied for more than 30 seconds while the vehicle is being driven. (DTC 2-1)

The transmission downshifted excessively. (DTC 4-1, 4-2)

The vehicle loses traction, and the front wheels spin for more than 1 minute when starting from a stuck condition on a

muddy, snowy, or sandy road. (DTC 4-8)

Tire adhesion is lost due to excessive cornering speed. (DTC 5, 5-4, 5-8)

The vehicle is driven on an extremely rough road. (DTC 8-1)

The vehicle is interfered by strong radio waves (noise), for example, illegal radio, etc. (DTC 8-2)

NOTE: If there is any trouble in the system, the ABS indicator light comes on during driving.

Diagnostic Trouble Code (DTC):

When the control unit detects a problem and the ABS indicator light comes on, the control unit memorizes the DTC.

The control unit has three memory registers. When a problem occurs, the control unit stores the DTC in the first memory

register. If another problem occurs, or the same problem occurs again, the control unit moves the first DTC to the next

memory register, and stores the second DTC in the first register. If there's a third problem occurrence, the two existing

DTCs are moved up one register, and the third DTC is stored in the first register. If problems continue to occur, the oldest

problem is moved out of the last register and lost, and the most recent problem is stored in the first register. When the

same problem occurs three times, the same DTC is stored in all memory registers. (Refer to the Symptom-to-System

Chart for diagnostic period.)

The most recent DTC is indicated first, and the oldest DTC is indicated last.

The DTCs are erased from the control unit when the ABS control unit +B2 power supply or connector is disconnected.

The control unit's memory can be erased by disconnecting the ABS B2 fuse for more than 3 seconds.

Self-diagnosis:

There are three self-diagnoses described below.

Initial diagnosis: Performed right after the engine starts until the ABS indicator light goes off.

Regular diagnosis: Continuously performed (under some conditions) after the ABS indicator light goes off until the

engine stops.

Individual part/system diagnosis: Diagnosis about a specific part/system under its operating conditions.

The CPU (central processing unit) controls the following when it detects a problem during self-diagnosis:

Turns the ABS indicator light ON.

Turns the front and rear fail-safe relays off.

Stops the ABS control.

Stops the ABS pump. (The pump may work under some conditions.)

After the DTC is stored in the control unit, the CPU stops self-diagnosis.ProCarManuals.com

Troubleshooting
DTC 5 , 5-4 , 5-8 : Rea r Whee l Loc k
The AB S contro l uni t monitor s th e rea r whee l senso r signal s durin g th e regula r diagnosi s (durin g driving) . Thi s diagnosi s
is no t performe d whe n th e parkin g brak e signa l i s ON . Th e AB S contro l uni t turn s th e AB S indicato r ligh t o n if i t detect s n o
signal(s ) fro m th e rea r whee l sensor(s ) du e to , fo r example , rea r whee l lock .
Possibl e causes :
Wheel spi n durin g cornerin g
Open circuit , interna l shor t o r shor t t o th e bod y groun d in th e whee l senso r syste m
Rear brak e dra g
Modulato r doe s no t decreas e pressur e properl y
Faulty AB S contro l uni t
— Whe n vehicl e i s driven , ABSindicato r ligh t i s ON .— Wit h th e SC S servic e connec -tor connecte d (se e pag e 19-40 ),DTC s 5 , 5- 4 and/o r 5- 8 ar e indi -
cated .
Chec k th e PAR K circuit :
1. Tur n th e ignitio n switc h O N (II) .2. Pres s th e parking brake pedal .
Doe s th e brak e syste m ligh t
com e on ? Parkin
g brak e switc h stuc k OFF .
Repai r ope n circui t betwee n th e
under-das h fuse/rela y bo x an d
parkin g brak e switch .
NOTE:The self-diagnosi s o f th e whee l senso r i s per -forme d i n thi s step .
Test-driv e wit h th e parkin g brak e released .
Does th e AB S indicato r ligh tcom e on ?
Chec k fo r rea r brak e drag :
1 . Rais e th e rea r o f th e vehicle ,
and suppor t i t wit h safet ystands (se e sectio n 1 ).2 . Spi n th e lef t and/o r righ t rea rwhee l an d chec k fo r brak e
drag . I
s cod e 4- 4 o r 4- 8 indicated ?
Perform th e troubleshootin g fo rthe rea r whee l sensor .
Perfor m th e appropriat e trouble -
shootin g fo r th e code .
Doe s th e brak e drag ?
Repair th e rea r brak e drag .
Check th e AB S functio n (se epage 19-95 ).
Th e probabl e caus e wa s tha t
tractio n wa s los t du e t o exces -
siv e cornerin g speed , etc .
Chec
k th e self-diagnosis :
Test-driv e th e vehicl e a t speed s
of 6 mp h (1 0 km/h ) o r more .
Confir m th e DT C (se e pag e 19-40 ).
ProCarManuals.com

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 .
ProCarManuals.com

Modulator Uni t
High-Pressur e Brak e Flui d Replacement/Bleedin g
Replacement
1. Reliev e syste m pressur e (se e pag e 19-97 ). Leav e th e
tub e an d wrenc h o n th e maintenanc e bleeder , an d
leav e th e tub e in th e container .
2 . Star t th e engin e t o operat e th e pum p motor .
NOTE:
If th e pum p moto r operate s fo r 4 0 second s o r
more , th e AB S indicato r ligh t come s on , an d th e
pum p moto r stops . Sto p an d restar t th e engin e t o
operat e th e pum p moto r again .
I f th e AB S indicator light come s on , remov e th e
AB S B 2 (1 5 A ) fus e fo r 3 second s o r mor e t o
eras e th e DT C afte r servicing .
3 . Repea t step s 1 an d 2 to drai n th e res t o f th e brak e
fluid fro m th e modulato r unit .
NOTE : Th e modulato r ha s a capacit y o f approxi -
mately 15 0 (5. 0 fl-oz , 5. 3 Imp-oz) . Approximatel y
35 - 4 5 (1. 2 - 1. 5 fl-oz , 1. 2 - 1. 6 Imp-oz ) o f th e flui d
i s draine d eac h tim e yo u reliev e syste m pressure .
4 . 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
not foam , an d wai t fo r a fe w minutes .
5. Repea t step s 1 an d 2 twice , an d refil l th e reservoi r
t o th e MA X (upper ) leve l wit h fres h brak e fluid .
6 . Tighte n th e maintenanc e bleede r t o th e specifie d
torque .
7 . Star t th e engine , an d mak e sur e tha t th e AB S indica -
tor ligh t goe s off .
Bleedin g
Whe n th e brak e flui d i s completel y draine d fro m th e
reservoi r (ai r enter s th e modulato r unit) , blee d th e ai r
from th e modulato r a s follows :
1 . Fil l th e reservoi r t o th e MA X (upper ) leve l wit h fres h
brake fluid .
2. Connec t a tub e t o th e maintenanc e bleede r o n th e
modulato r unit , an d se t th e othe r en d o f th e tub e in a
suitabl e containe r (se e pag e 19-97 ).
3 . Loose n th e bleeder , an d star t th e engin e t o operat e
th e pum p motor .
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 .
NOTE : Tak e car e no t t o spil l th e brak e flui d fro m
th e container .
5 . Sto p th e engin e afte r th e pum p moto r stops .
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 .
19-98ProCarManuals.com

Anti-lock Brake System (ABS)

Features/Construction (cont'd)

ABS Control

The ABS control unit detects the wheel speed based on the wheel sensor signal it received, then it calculates the vehicle

speed based on the detected wheel speed. The control unit detects the vehicle speed during deceleration based on the

rate of deceleration.

The ABS control unit calculates the slip rate of each wheel, and it transmits the control signal to the modulator unit

solenoid valve when the slip rate is high.

The pressure reduction control has 3-modes: pressure reduction, pressure retaining, and pressure intensifying.

ABS CONTROL UNITProCarManuals.com

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
Terminal
number
1
3
4
5
6
7
8
9
10
1 1
Wir e
colo r
BLK
WHT/RED *
GRN/RED
WHT/GRN *
BRN
GRN/BL U
GRN
GRN/BL K
GRN/WH T
YEL/BLK
Termina l sig n
(Termina l
name)
GND3
(Groun d 3 )
FL P
(Front-lef t
pulse )
PARK
(Parking )
FRP
(Front-righ t
pulse)
FLW (-)
(Front-lef t
wheel negative )
FLW (+ )
(Front-lef t
wheel positive )
FRW (-)
(Front-righ t
wheel negative )
FRW (+ )
(Front-righ t
wheel positive )
STOP
IG2
(Ignitio n 2 )
Descriptio n
Ground
Output s left-fron t whee l
senso r signa l
Detect s parkin g brak e
switc h signa l
Output s right-fron t whee l
senso r signa l
Detect s left-fron t whee l
senso r signa l
Detect s right-fron t whee l
senso r signa l
Detect s brak e peda l posi -
tion switc h signa l
Power sourc e fo r activatin g
the syste m
Measuremen t
Terminal
1-GND
3-GN D
4-GN D
5-GND
6-7
8- 9
10-GN D
11-GND
Condition s
(Ignition switch ON (ID )
Spi n whee l slowl y
Parkin g brak e Presse d
pedal Release d
Spin whee l slowl y
Spin whee l a t
1 turn/secon d
Stoppe d
Brake Presse d
pedal Release d
Ignition O N (II )
switc h Star t (III )
Voltag e
Below 0. 3 V
5 V 0 V
Below 0. 3 V
Batter y Voltag e
5V 0 V
AC:
0.05 3 V or
abov e
(Reference )
Oscilloscope :
0.15Vp-p o r
abov e
0.25-1 . 15 V
Batter y Voltag e
Belo w 0. 3 V
Batter y Voltag e
Below 0. 3 V
*: Wit h TC S onl y
ProCarManuals.com