brake ACURA RL KA9 1996 Service Manual PDF

DTC 68: Brake Pedal Position Switch

Is there battery voltage?

Check for an open in the STOP

circuit:

Measure the voltage between the

VSA control unit 42P connector

terminal No. 32 and body ground

when the brake pedal is pressed.

Is there battery voltage?
Replace the brake pedal position

switch.

VSA CONTROL UNIT 42P CONNECTOR

Repair short to power in the wire

between the brake pedal position

switch and the VSA control unit.
Terminal side of female terminals

Repair open in the wire between

the brake pedal position switch

and the VSA control unit.

Check for loose terminals in the

VSA control unit 42P connector.

If necessary, substitute a known-

good VSA modulator-control

unit, and recheck.ProCarManuals.com

Troubleshooting

DTC 71: Abnormal Wheel Speed Signal

Are any DTCs except 71 indicated?

Check the tires.

Are tires with specified size and

inflated to specification?

Check for brake drag.

Do the brakes drag?

Visually check for appropriate

wheel sensor and pulser installa-

tion (see table).

Are they installed correctly?

Check the four pulser gears for a

chipped tooth (see table).

Is the pulser OK?

Problem Verification:

1. Clear the DTC.

2. Test-drive the vehicle at 19

mph (30 km/h) or more.

3. Verify the DTC.

Is DTC 71 indicated?

YES

Check for loose terminals in the

VSA control unit 42P connector.

If necessary, substitute a known-

good VSA modulator-control

unit, and recheck.
Preform the appropriate trou-

bleshooting for the DTC.

Replace the tire(s) with the spec-

ified size.

Repair the brake drag.

Reinstall or replace the wheel

sensor or pulser.

Replace the driveshaft or hub

unit. (Chipped pulser gear.)

The system is OK at this time.
Verify the DTC.ProCarManuals.com

VSA Modulator-Control Unit

Removal/Installation

NOTE:

Do not spill brake fluid on the vehicle; it may damage the paint; if brake fluid does contact the paint, wash it off imme-

diately with water.

Take care not to damage or deform the brake lines during removal and installation.

To prevent the brake fluid from flowing, plug and cover the hose ends and joints with a shop towel or equivalent material.

Removal

1. Disconnect the pressure sensor 3P connector.

2. Pull the locking lever of the VSA control unit 42P connec-

tor up, then disconnect the connector.

3. Disconnect the six brake lines.

4. Remove the two 8 mm nuts.

5. Remove the VSA modulator-control unit.

Installation

1. Install the VSA modulator-control unit, then tighten the

two 8 mm nuts.

2. Align the connecting surfaces of the VSA control unit 42P

connector.

3. Push the locking lever of the VSA control unit 42P connec-

tor down until you hear a click.

4. Connect the pressure sensor 3P connector.

5. Connect the six brake lines.

6. Perform the precharge brake line bleeding (see page 19-

271).

7. Bleed the brake system, starting with the front wheels.

8. Start the engine, and check that the ABS indicator goes

off.

9. Test-drive the vehicle, and check that the ABS indicator

does not come on.

To right-rear

To left-rear

PRESSURE SENSOR

3P CONNECTOR

VSA MODULATOR

CONTROL UNIT
LOCKING LEVER

VSA CONTROL UNIT

42P CONNECTOR

To right-front

To left-front

FLARE NUT

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

MOUNTING BOLT

VSA CONTROL UNIT 42P CONNECTOR

8 mm BOLT

22 N-m (2.2 kgf-m, 16 Ibf-ft)
8 mm NUT

9 N-m (0.9 kgf-m, 7 Ibf-ft)

RUBBER MOUNT

BRACKETProCarManuals.com

Precharge Pum p Moto r
Removal/Installatio n
NOTE:
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 imme -
diatel y wit h water .
Tak e 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 .
Remova l
1. Disconnec t th e precharg e pum p moto r 2 P connector .
2 . Disconnec t th e brak e lin e an d th e brak e hos e fro m th e precharg e pum p motor .
3 . Remov e th e thre e 6 m m bolt s fro m th e precharg e pum p motor , the n remov e th e precharg e pum p moto r wit h bracket .
4 . Remov e th e tw o 6 m m bolt s an d 8 m m nut , the n remov e th e precharg e pum p motor .
Installatio n
1. Instal l th e precharg e pum p moto r o n th e bracket , the n tighte n th e tw o 6 m m bolt s an d th e 8 m m nut .
2 . Instal l th e precharg e pum p moto r wit h bracket , the n tighte n th e thre e 6 m m bolts .
3 . Connec t th e brak e lin e an d th e brak e hos e o n th e precharg e pum p motor .
4 . Perfor m th e precharg e brak e lin e bleedin g (se e pag e 19-271 ).
5 . Blee d th e brak e system , startin g wit h th e fron t wheels .
6 . Star t th e engine , an d chec k tha t th e AB S indicato r goe s off .
7 . Test-driv e th e vehicle , an d chec k tha t th e AB S indicato r doe s no t com e on .
6 m m BOL T
9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
BRAKE HOS E
8 m m NU T13 N- m (1. 3 kgf-m , 9. 4 Ibf-ft )
BRAKE LIN E
FLAR E NU T
1 5 N- m 11. 5 kgf-m , 1 1 Ibf-ft )
PRECHARG E PUM P MOTO R
RUBBE R MOUN T
MOUNTIN G BOL T
PRECHARG E PUM P MOTO R2P CONNECTO R
BRACKET
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Precharge Brake Line Bleeding

1. Connect the SCS service connector to the service check connector (2P) under the glove box.

2. Press the parking brake pedal.

3. Press the VSA off switch, and hold it.

4. Turn the ignition switch ON (II).

5. Release the VSA off switch after the VSA activation indicator goes off twice.

6. Press the VSA off switch after the VSA activation indicator comes on.

7. Release the VSA off switch after the VSA activation indicator goes off.

8. Press the VSA off switch after the VSA activation indicator starts blinking.

9. Release the VSA off switch after the VSA activation indicator stops blinking.

10. Turn the ignition switch OFF, then repeat steps 2 through 10 for 4 times.ProCarManuals.com

LEFT REA R DOO R SWITC H
Test , pag e 23-26 4
BRAKE LIGH T
FAILUR E SENSO R
Test , pag e 23-9 6 TRUN
K LI D LATC H SWITC H
Test/Replacement , pag e 23-35 3
DRIVER'
S DOO R SWITC H
Test , pag e 23-26 4
BRAK
E SWITCH *
Se e sectio n 1 9
* : Yo u ca n als o tes t th e switc h b y usin g th e self-diagnosi s functio n (mod e 2) . (Se e pag e 23-252 .)
Safet y Indicato r
Componen t Locatio n Inde x
SRS component s ar e locate d i n thi s area . Revie w th e SR S componen t locations , precautions , an d procedure s i n th e SR S
(sectio n 24 ) befor e performin g repair s o r service .
SAFETY INDICATO R
Inpu t Test , pag e 23-9 4
FRON T PASSENGER' S DOO R SWITC H
Test , pag e 23-26 4
RIGHT REA R DOO R SWITC H
Test , pag e 23-26 4
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Safety Indicato r Syste m
Brake Ligh t Failur e Senso r Tes t
'96 - 9 8 models :
1 . Firs t mak e sur e th e brak e light s com e o n whe n th e
brak e peda l i s pressed .
• I f al l th e brak e light s com e on , g o t o ste p 2 .
• I f on e o f th e brak e light s doe s no t com e on , chec k
whethe r th e bul b is blown . I f th e bul b is OK , g o to
ste p 2 .
• I f non e o f th e brak e light s com e on , chec k th e
brak e ligh t circui t.
2 . Ope n th e trun k lid .
3 . Pul l bac k th e lef t trun k sid e pane l t o uncove r th e
brak e ligh t failur e senso r (se e sectio n 20 ).
4 . Mak e sur e th e ligh t i n th e safet y
indicato r doe s no t com e o n an d sta y o n whe n th e
No . 1 termina l o f th e 8 P connecto r i s grounde d an d
the ignitio n switc h is turne d fro m OF F to O N (II) .
• I f th e ligh t doe s no t g o off , chec k
for:
an ope n i n th e WHT/GR N wir e betwee n th e
safet y indicato r an d lef t taillight .
a fault y safet y indicato r circui t i n th e gaug e
assembly .
• I f th e ligh t goe s off , g o t o ste p 5 .
5. Mak e sur e th e ligh t i n th e safet y indi -
cato r come s o n an d goe s of f whe n th e No . 7 termina l
o f th e 8 P connecto r i s grounded , th e brak e peda l i s
depressed , an d th e ignitio n switc h is turne d fro m OF F
to O N (II) .
• I f th e ligh t doe s no t g o off , replac e
th e brak e ligh t failur e sensor .
• I f th e ligh t goe s off , chec k for :
poo r groun d (G701) .
an ope n i n th e BL K wire .
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