sensor ACURA RL KA9 1996 Service Repair Manual

DTC 11, 13, 15, 17: Wheel Sensor (Open/Short to Body Ground/Short to Power)

Check for a short to power in the

wheel sensor circuit:

1. Disconnect the VSA control

unit 42P connector.

2. Start the engine.

3. Measure the voltage between

the VSA control unit 42P con-

nector appropriate wheel sen-

sor (+) circuit terminal and

body ground (see table).
DTC

11 (Right-front)

13 (Left-front)

15 (Right-rear)

17 (Left-rear)
Appropriate Terminal

(+) Side

No. 16:FRS(+)

No. 28:FLS(+)

No. 31: RRS (+)

No.14: RLS(+)
(-) Side

No. 15: FRS(-)

No. 13:FLS (-)

No. 30:
RRS
(-)

No. 29: RLS (-)
VSA CONTROL UNIT 42P CONNECTOR

Is there battery voltage?
Repair short to power in the {+)

or (-) circuit wire between the

VSA control unit and appropriate

wheel sensor.
Wire side of female terminals

Check for a short to body ground

in the wheel sensor circuit:

1. Turn the ignition switch OFF.

2. Check for continuity between

the VSA control unit 42P con-

nector appropriate wheel sen-

sor (+) circuit terminal and

body ground (see table).

Is there continuity?
Repair short to body ground in

the (+) or (-) circuit wire between

the VSA control unit and the

appropriate wheel sensor.

Replace the appropriate wheel

sensor.

Check for an open in the wheel

sensor circuit:

Measure the resistance between

the VSA control unit 42P connector

appropriate wheel sensor (+) and

(-) circuit terminals (see table).

Is the resistance between

450 - 2,000 at 68°F?
• Repair open in the (+) or (-) cir-

cuit wire between the VSA con-

trol unit and the appropriate

wheel sensor.

• Replace the appropriate wheel

sensor.

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 12 , 14 , 16 , 18 : Whee l Senso r (Electrica l Noise/Intermitten t Interruption )
NOTE: If the ABS indicator comes on for the reasons described below, the indicator should go off when you test drive the
vehicle a t speed s abov e 1 9 mp h (3 0 km/h) .
Onl y th e driv e wheel s rotate d
Th e vehicl e spu n
Electrica l nois e
Is ther e continuity ?
DTC
12
1 4
16
18
Appropriat e Whee l Senso r
Right-fron t
Left-fron t
Right-rea r
Left-rear
Reinstal l o r replac e th e appropri -
at e whee l senso r o r pulser . VS
A CONTRO L UNI T 42 P CONNECTO R
DTC
12 (Right-front )
1 4 (Left-front )
16 (Right-rear )
18 (Left-rear )
Appropriat e Termina l
(+ ) Sid e
No. 16:FRS(+ )
No. 28:FLS(+ )
No. 31:RRS(+ )
No. 14:RLS(+ )
(-) Sid e
No. 15:FRS( - )
No . 13 : FL S (- )
No . 30 : RR S (- )
No . 29 : RL S (- )
Wir e sid e o f femal e terminal s
Repair shor t t o wir e betwee n th eappropriat e whee l senso r (+ ) an d
(- ) circuits .
DTC
12 (Right-front )
1 4 (Left-front )
16 (Right-rear )
18 (Left-rear )
Appropriat e
Termina l
No. 16:FRS(+ )
No. 28:FLS(+ )
No.31:RRS(+ )
No. 14:RLS(+ )
Other Termina l
No. 28 : FL S (+)
No . 16:FRS(+ )
No. 16 : FR S (+ )
No . 16 : FR S (+ )
No . 31:RRS(+ )
No . 31:RRS(+ )
No. 28 : FL S (+ )
No . 28 : FL S (+ )
No . 14:RLS(+ )
No. 14:RLS(+ )
No. 14 : RL S (+ )
No . 31 : RR S (+ )
Repai r shor t t o wir e betwee n th e
appropriat e whee l senso r an d
th e othe r whee l sensor .
Clear th e DTC , an d test-driv e th evehicle . I f th e AB S indicato rcomes o n an d th e sam e DT C i sindicated , replac e th e VS A mod -ulator-contro l unit .
Chec k fo r a shor t t o anothe r wir ein th e whee l senso r circuit :Check fo r continuit y betwee n th eappropriat e whee l senso r (+ ) circui ttermina l an d othe r whee l senso r(+) circui t terminal s (se e table) .
Is ther e les s tha n 45 0 ?
Visuall y chec k fo r appropriat ewheel senso r an d pulse r installa -tion (se e table) .
Are the y installe d correctly ?
ProCarManuals.com

(From pag e 19-224 )VSA CONTRO L UNI T 42 P CONNECTO R
Chec k fo r a n ope n in th e YRS A
Y U circuit :
Chec k 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 .
YA W RATE/LATERA LACCELERATION SENSO R6P CONNECTO R
I s ther e continuity ? 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
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 rterminal No . 2 1 an d th e ya w rate /
latera l acceleratio n senso r 6 P
connecto r termina l No . 4 .
I s ther e continuity ? 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 .
Chec k th e ya w rat e sensor :
1 . Substitut e a known-goo d ya w
rate/latera l acceleratio n sensor .
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 5 indicated ? Replac
e th e ya w rate/latera l
acceleratio n sensor .
Replac e th e VS A modulator -
contro l unit . Wir
e sid e o f
femal e terminal s
ProCarManuals.com

Troubleshooting
DTC 26 : Latera l Acceleratio n Senso r
Check th e wheels , tires , suspen -sion, an d alignment .
Do thes e component s mee t
th e norma l standards ?
Chec k fo r installatio n directio n o f
th e ya w rate/latera l acceleratio n
sensor.The senso r connecto r sid e mus t
b e facin g backward .
Is i t correct ?
Check fo r a shor t t o powe r i n th eAY circuit :1. Disconnec t th e VS A contro lunit 42 P connector , th e ya wrate/latera l acceleratio n sen -
so r 6 P connector .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Measur e th e voltag e betwee n
th e VS A contro l uni t 42 P con -
necto r termina l No . 8 an d bod y
ground .
Is ther e batter y voltage ?
Chec k fo r a shor t t o bod y groun d
i n th e A Y circuit :
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 . 8 an d bod y
ground .
I s ther e continuity ?
(To pag e 19-227 )
Repair t o norma l standards .
Reinstall th e ya w rate/latera lacceleration senso r correctly .
VSA CONTRO L UNI T 42 P CONNECTO R
Wir e sid e o f femal e terminal s
Repai r shor t t o powe r i n th e wir e
betwee n th e ya w rate/latera l
acceleration senso r an d th e VS Acontro l unit .
Repai r shor t t o bod y groun d in th ewir e betwee n th e ya w rate /lateral acceleratio n senso r a n d th e
VS A contro l unit .
ProCarManuals.com

(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 .
ProCarManuals.com

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)
ProCarManuals.com

(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)
ProCarManuals.com

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 .
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

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 .
ProCarManuals.com