1996 ACURA RL KA9 sensor

(From pag e 19-226 )
Check fo r an ope n i n th e A Y cir -cuit :
Chec k fo r continuit y betwee n th e
VS A contro l uni t 42 P connecto r
termina l No . 8 an d th e ya w rate /
latera l acceleratio n senso r 6 P
connecto r termina l No . 5 .
I s ther e continuity ?
Chec k fo r a n ope n in th e YRS A
YU circuit :Check fo r continuit y betwee n th e
VS A contro l uni t 42 P connecto r
termina l No . 3 9 an d th e ya w rate /
latera l acceleratio n senso r 6 P
connecto r termina l No . 1 .
I s ther e continuity ?
Chec k fo r a n ope n in th e YRS A
Y M circuit :
Chec k fo r continuit y betwee n th e
VS A contro l uni t 42 P connecto r
termina l No . 2 1 an d th e ya w rate /
latera l acceleratio n senso r 6 Pconnecto r termina l No . 4 .
I s ther e continuity ?
Chec k th e latera l acceleratio n
sensor:1. Substitut e a known-goo d ya wrate/latera l acceleratio n sen -sor.2. Connec t al l o f disconnecte d
connector .
3. Clea r th e DTC .4. Tes t driv e th e vehicl e aroun d anumbe r o f corners .5. Verif y th e DTC .
I s DT C 2 6 indicated ? VS
A CONTRO L UNI T 42 P CONNECTO R
Repai r ope n in th e wir e betwee n
th e ya w rate/latera l acceleratio n
senso r an d th e VS A contro l unit . Wir
e sid e o f femal e terminal s
YAW RATE/LATERA LACCELERATION SENSO R6P CONNECTO R
Wire sid e o f femal e terminal s
Repai r ope n in th e wir e betwee n
th e ya w rate/latera l acceleratio n
senso r an d th e VS A contro l unit .
Replac e th e ya w rate/latera l
acceleratio n sensor .
Replac e th e VS A modulato r con -
tro l unit . Repai
r ope n in th e wir e betwee n
th e ya w rate/latera l acceleratio n
senso r an d th e VS A contro l unit .
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Troubleshooting
DTC 27: Steering Angle Sensor
Perform the steering angle sen-
sor neutral position check proce-
dure (see page 19-268).
Is it OK?
Check the steering angle sensor
installation.
Is it correct?
Check for a short to power in the CAN circuit:
1. Disconnect the VSA control unit 42P connector, the steer-
ing angle sensor 4P connector
and the VSA converter unit
26P connector.2. Turn the ignition switch ON (II).
3. Measure the voltage between body ground and the VSA con-
trol unit 42P connector terminalNo. 24 and 40 individually.
Is there battery voltage?
Is there continuity?
Check for an open in the YRSA
YU circuit:
Check for continuity between the
VSA control unit 42P connector
terminal No. 39 and the steering angle sensor 4P connector termi-
nal No. 4.
Is there continuity?
(To page 19-229)
Perform the steering angle sen-
sor neutral position memorizing
procedure (see page 19-268).
Install the steering angle sensorcorrectly.
VSA CONTROL UNIT 42P CONNECTOR
Repair short to power in the wire
between the steering angle sen-
sor and the VSA control unit.
Wire side of female terminals
Repair short to body ground in
the wire between the steeringangle sensor and the VSA con-trol unit.
Repair open in the wire between
the steering angle sensor and the VSA control unit.STEERING ANGLE SENSOR4P CONNECTOR
Wire side of female terminals
Check for a short to body ground
in the CAN circuit:1. Turn the ignition switch OFF.
2. Check for continuity between body ground and the VSA con-
trol unit 42P connector terminal
No. 24 and 40 individually.
(RED/BLU)
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(From page 19-228)
Check for an open in the YRSAYM circuit:
Check for continuity between the
VSA control unit 42P connector
terminal No. 21 and the steering angle sensor 4P connector termi-
nal No. 1.
Is there continuity?
Check for an open in the CAN (+)
circuit:
Check for continuity between the
VSA control unit 42P connector
terminal No. 24 and the steering angle sensor 4P connector termi-
nal No. 2.
Is there continuity?
Check for an open in the CAN (-)
circuit: Check for continuity between the
VSA control unit 42P connector
terminal No. 40 and the steering angle sensor 4P connector termi-
nal No. 3.
Is there continuity?
Check the steering angle sensor: 1. S u b s t i t u t e a k n o w n - g o o d steering angle sensor.
2. Connect all of disconnected connector.
3. Clear the DTC.4. Test drive the vehicle around anumber of corners.
5. Verify the DTC.
Is DTC 27 indicated? VSA CONTROL UNIT 42P CONNECTOR
Repair open in the wire between
the steering angle sensor and
the VSA control unit. Wire side of
female terminals
STEERING ANGLESENSOR 4PCONNECTOR
Wire side of female terminals
Replace the steering angle sensor.
Repair open in the wire between
the steering angle sensor and
the VSA control unit.
Repair open in the wire between
the steering angle sensor and
the VSA control unit.
Replace the VSA modulator-con-
trol unit.
YRSA YM
(RED/WHT)
(RED)
(WHT)
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DTC 64 : Senso r Powe r Sourc e
Check fo r a shor t t o bod y groun d
i n th e PS U circuit :
1 . Disconnec t th e VS A contro l
unit 42 P connecto r an d th epressur e senso r 3 P connector .
2 . Chec k fo r continuit y betwee n
th e VS A contro l uni t 42 P con -
necto r termina l No . 4 2 an d
bod y ground .
I s ther e continuity ?
Chec k fo r a shor t t o bod y groun d
i n th e YRS A Y U circuit :
1 . Disconnec t th e ya w rate/later -
a l acceleratio n senso r 6 P con -
necto r an d th e steerin g angl e
senso r 4 P connector .
2 . Chec k fo r continuit y betwee n
the VS A contro l uni t 42 P con -necto r termina l No . 3 9 an d
bod y ground .
I s ther e continuity ?
Proble m verification :
1. Clea r th e DTC .2. Test drive the vehicle at 6 mph(km/h ) o r more .
3 . Verif y th e DTC .
I s DT C 6 4 indicated ?
Chec k fo r loos e terminal s i n th e
VS A contro l uni t 42 P connector .
I f necessary , substitut e a known -
goo d VS A modulator-contro l
uni t an d recheck . VS
A CONTRO L UNI T 42 P CONNECTO R
Wire sid e o f femal e terminal s
Repair shor t t o bod y groun d i n
th e wir e betwee n th e pressur e
senso r an d th e VS A contro l unit .
Repai r shor t t o bod y groun d i n
th e wir e betwee n th e ya wrate/latera l acceleratio n sensor ,
th e steerin g angl e senso r an d
th e VS A contro l unit .
Th e syste m is O K a t thi s time .
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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

DTC 84 : Steerin g Angl e Senso r Neutra l Positio n
Perform th e steerin g angl e sen -
so r neutra l positio n chec k proce -
dur e (se e pag e 19-268 ).
Is it OK ?Perfor m th e steerin g angl e sen -
so r neutra l positio n memorizin g
procedur e (se e pag e 19-268 ).
Chec k th e steerin g angl e sensor :
1. Substitut e a known-goo dsteering angl e sensor .2. Connec t al l o f disconnecte d
connector .
3. Clea r th e DTC .4. Test-driv e th e vehicl e aroun da numbe r o f corners .
5 . Verif y th e DTC .
I s th e DT C 8 4 indicated ? Replac
e th e steerin g angl e sensor .
Replac e th e VS A modulator -
contro l unit .
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Troubleshooting
DTC 86 : CA N Bu s Circui t
Check fo r a shor t t o powe r i n th eCA N circuits :1. Disconnec t th e VS A converte r
uni t 26 P connector , steerin g
angl e senso r 4 P connecto r
an d th e VS A contro l uni t 42 P
connector .2. Tur n th e ignitio n switc h O N (II) .3. Measur e th e voltag e betwee nbody groun d an d th e VS Acontro l uni t 42 P connecto rterminal No . 2 4 an d No . 4 0individually .
I s ther e batter y voltage ?
(T o pag e 19-253 )
VSA CONTRO L UNI T 42 P CONNECTO R
Wire sid e o f femal e terminal s
Repair shor t t o powe r i n th e wir ebetwee n th e steerin g angl e sen -
sor , VS A converte r unit , an d th e
VS A contro l unit .
Repai r shor t t o bod y groun d i nth e wir e betwee n th e steerin gangle sensor , VS A converte runit, an d th e VS A contro l unit .
Wire sid e o f femal e terminal s
Repai r ope n in th e wir e betwee n
the VS A contro l uni t an d th eVSA converte r unit . VS
A CONVERTE R UNI T 26 P CONNECTO R
I s ther e continuity ?
Check fo r a n ope n in th e CA N cir -cuit s (converte r side) :
1 . Chec k fo r continuit y betwee n
th e VS A contro l uni t 42 P con -
necto r termina l No . 2 4 an d
th e VS A converte r uni t 26 P
connecto r termina l No . 18 .
2 . Chec k fo r continuit y betwee n
the VS A contro l uni t 42 P con -necto r termina l No . 4 0 an d
th e VS A converte r uni t 26 P
connecto r termina l No . 19 .
I
s ther e continuity ?
Chec
k fo r a shor t t o bod y groun d
i n th e CA N circuits :
1 . Tur n th e ignitio n switc h OFF .
2 . Chec k fo r continuit y betwee n
bod y groun d an d th e VS A
contro l uni t 42 P connecto rterminal No . 2 4 an d No . 4 0individually .
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DTC 92 : VS A Converte r Uni t
Chec k fo r a n ope n i n th e IG 1 cir -cuit :
1 . Tur n th e ignitio n switc h O N (II) .
2 . Measur e th e voltag e betwee n
th e VS A converte r uni t 26 P
connecto r termina l No . 2 6
an d bod y ground .
I s ther e batter y voltage ?
Chec k fo r a n ope n in th e LG 1 cir -
cuit :
Measur e th e voltag e betwee n th e
VS A converte r uni t 26 P connec -
to r termina l No . 2 6 an d No . 1 .
I s ther e batter y voltage ?
Chec k fo r a n ope n in th e CA N cir -
cuit s (converte r side) :
1 . Tur n th e ignitio n switc h OFF .
2 . Chec k fo r continuit y betwee n
th e VS A contro l uni t 42 P con -
necto r termina l No . 2 4 an d
th e VS A converte r uni t 26 P
connecto r termina l No . 18 .
3 . Chec k fo r continuit y betwee n
th e VS A contro l uni t 42 P con -
necto r termina l No . 4 0 an d
th e VS A converte r uni t 26 P
connecto r termina l No . 19 .
I s ther e continuity ?
Chec k fo r a n ope n in th e CA N cir -
cui t (steerin g angl e senso r side) :
1 . Chec k fo r continuit y betwee n
the VS A contro l uni t 42 P con -necto r termina l No . 2 4 an d
th e steerin g angl e senso r 4 P
connecto r termina l No . 2 .
2 . Chec k fo r continuit y betwee n
th e VS A contro l uni t 42 P con -
necto r termina l No . 4 0 an d
th e steerin g angl e senso r 4 P
connecto r termina l No . 3 .
I s ther e continuity ?
(To pag e 19-256 )
VSA CONVERTE R UNI T 26 P CONNECTO R
Repai r ope n in th e wir e betwee n
th e under-das h fuse/rela y bo x
an d th e VS A converte r unit .
IG1 (BLK/YEL )
Wire sid e o f femal e terminal s
Repai r ope n i n th e wir e
betwee n th e VS A converte r
uni t an d bod y ground .
Repair poo r groun d (G101) .VSA CONTRO L UNI T 42 P CONNECTO R
Wir e sid e o f femal e terminal s
Repai r ope n in th e wir e betwee n
th e VS A contro l uni t an d th e
VS A converte r unit .
STEERIN G ANGL E SENSO R4P CONNECTO R
Repair ope n in th e wir e betwee n
th e VS A contro l uni t an d th e
steerin g angl e sensor . Wir
e sid e o f
femal e terminal s
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