1996 ACURA RL KA9 Service Repair Manual

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 ?
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DTC 25 : Ya w Rat e Senso r
Do thes e component s mee t
th e norma l standards ?
Check fo r a shor t t o powe r i n th eYR S RE F circuit :
1 . Disconnec t th e VS A contro l
uni t 42 P connector , th e ya w
rate/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 . 1 0 an d
bod y ground .
I s ther e batter y voltage ?
Chec k fo r a shor t t o powe r i n th e
YRS T circuit :Measur e th e voltag e betwee n th e
VS A contro l uni t 42 P connecto r
termina l No . 9 an d bod y ground .
I s ther e batter y voltage ?
Chec k fo r a shor t t o powe r i n th e
YRS S circuit :Measur e th e voltag e betwee n th e
VS A contro l uni t 42 P connecto r
termina l No . 4 1 an d bod y ground .
I s ther e batter y voltage ?
(To pag e 19-224 )
Repair t o norma l standards .
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 powe r i n 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 .
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 .
Chec
k th e wheels , tires , suspen -
sion , an d alignment .
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Troubleshooting
DTC 25 : Ya w Rat e Senso r (cont'd )
(From pag e 19-223 )
Chec k fo r a shor t t o bod y groun d
i n th e ya w rat e senso r circuit :
1 . Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e steerin g angl e
senso r 4 P connector .
3. Chec k fo r continuit y betwee nbody groun d an d th e VS Acontro l uni t 42 P connecto rterminal No . 9 , 10 , 21 , 39 , 4 1individually .
Are ther e continuity ?
Chec k fo r a n ope n i n th e YR S
REF circuit :
Chec k fo r continuit y betwee n th e
VS A contro l uni t 42 P connecto rterminal No . 1 0 an d th e ya w rate /
latera l acceleratio n senso r 6 P con -
necto r termina l No . 3 .
I s ther e continuity ?
Chec k fo r a n ope n in th e YRS T
circuit :
Chec k fo r continuit y betwee n th e
VS A contro l uni t 42 P connecto r
termina l No . 9 an d th e ya w rate /
latera l acceleratio n senso r 6 P
connecto r termina l No . 2 .
I s ther e continuity ?
Chec k fo r a n ope n i n th e YRS S
circuit :
Chec k fo r continuit y betwee n th e
VS A contro l uni t 42 P connecto rterminal No . 4 1 an d th e ya w rate /
latera l acceleratio n senso r 6 P
connecto r termina l No . 6 .
I s ther e continuity ?
(To pag e 19-225 )
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 bod y groun d 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 .
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 .
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 .
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