ACURA RL KA9 1996 Service Repair Manual

Troubleshooting Precautions

Kickback

1. The motor operates when the ABS is functioning, and the fluid in the reservoir is forced out to the master cylinder,

causing kickback at the brake pedal.

Pump Motor

1. The pump motor operates when the ABS is functioning.

2. The ABS control unit checks the pump motor operation during initial diagnosis when the vehicle is started. You may

hear the motor operate at this time, but it is normal.

Brake Fluid Replacement/Air Bleeding

1. Brake fluid replacement and air bleeding procedures are the same as vehicles without ABS. To ease bleeding, start

with the front wheels.

Troubleshooting

1. The troubleshooting flowcharts procedures assume that the cause of the problem is still present and the ABS indicator

is still on. Following the flowchart when the ABS indicator does not come on can result in incorrect diagnosis.

2. Question the customer about the conditions when the problem occurred, and try to reproduce the same conditions

for troubleshooting.

Find out when the ABS indicator came on, such as during initial diagnosis, during ABS control, after ABS control,

when vehicle speed was at a certain speed, etc.

3. When the ABS indicator does not come on during the test-drive, but troubleshooting is performed based on the DTC,

check for loose connectors, poor contact at the terminals, etc. before you start troubleshooting.

4. After troubleshooting, erase the DTC and test-drive the vehicle. Be sure the ABS indicator does not come on.

5. The connector illustrations show the female terminals with a single outline and the male terminals with a double outline.ProCarManuals.com

Diagnostic Troubl e Cod e (DTC )
Diagnosti c Troubl e Cod e (DTC ) Indicatio n
NOTE: Thi s operatio n ca n als o b e don e wit h th e Hond a PG M Tester .
1 . Connec t th e SC S servic e connecto r t o th e servic e chec k connecto r (2P ) unde r th e glov e box .
2 . Tur n th e ignitio n switc h O N (II ) withou t th e brak e peda l pressed .
NOTE : I f th e brak e peda l i s presse d whe n turnin g th e ignitio n switc h O N (II) , th e syste m shift s t o th e DT C Erasur e
mode .
3 . Th e blinkin g frequenc y indicate s th e DTC .
NOTE : I f th e DT C is no t memorized , th e AB S indicato r wil l g o of f fo r 3. 6 seconds , an d the n com e bac k on .
4 . Tur n th e ignitio n switc h OFF , an d remov e th e SC S servic e connector .
NOTE : Th e Malfunctio n Indicato r Lam p (MIL ) wil l sta y o n afte r th e engin e is starte d i f th e SC S servic e connecto r i s con -
nected .
Condition s fo r DT C indicatio n
Vehicl e spee d is 6 mp h (1 0 km/h ) o r less .
Th e SC S servic e connecto r i s connecte d befor e th e ignitio n switc h is turne d O N (II) .
Th e brak e peda l i s released .
SERVICE CHEC KCONNECTO R (2P )
ABS INDICATO R
SC S SERVIC E CONNECTO R
07PAZ-001010 0
DTC: 1 2DT C : 3 3
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Diagnostic Troubl e Cod e (DTC )
DTC Erasur e
NOTE: Thi s operatio n ca n als o b e don e wit h th e Hond a PG M Tester .
1 . Connec t th e SC S servic e connecto r t o th e servic e chec k connecto r (2P ) unde r th e glov e box .
2 . Pres s th e brak e pedal .
3. Tur n th e ignitio n switc h O N (II ) whil e keepin g th e brak e peda l pressed .
4. Afte r th e AB S indicato r goe s off , releas e th e brak e pedal .
5 . Afte r th e indicato r come s on , pres s th e brak e peda l again .
6 . Afte r th e indicato r goe s off , releas e th e brak e peda l again .
7 . Afte r a fe w seconds , th e AB S indicato r blink s twic e an d th e DT C is erased . I f th e indicato r doe s no t blin k twice , repea t
step s 1 throug h 6 . I f th e indicato r stay s O N afte r th e indicato r blink s twice , chec k th e DT C becaus e a proble m wa s
detecte d durin g initia l diagnosi s befor e shiftin g to DT C Erasur e mode .
8. Tur n th e ignitio n switc h OFF , an d remov e th e SC S servic e connector .
Conditions fo r DT C erasur e
Vehicl e spee d is 6 mp h (1 0 km/h ) o r less .
Th e SC S servic e connecto r i s connecte d befor e th e ignitio n switc h is turne d O N (II) .
The brak e peda l i s presse d befor e th e ignitio n switc h is turne d O N (II) .
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Troubleshooting Inde x
DTC
NO
DT C
11
13
1 5
17
1 2
1 4
16
18
2 1
2 2
23
2 4
31
3 2
33
3 4
35
3 6
37
3 8
4 1
4 2
43
4 4
51
5 2
53
5 4
61
6 2
71
81
OF F
ON
O N
ON
O N
O N
ON
O N
ON
O N
O N
O N
ON
O N
DIAGNOSIS/SYMPTO M
ABS indicato r doe s no t com e o n
AB S indicato r doe s no t g o of f (N o DTC )
Whee l senso r (open/shor t t o bod y ground/shor t t o
power )
Whee l senso r (electrica l noise/intermitten t interrup -
tion)
Pulse r
Solenoi d (shor t t o bod y ground/shor t t o wire )
Whee l loc k
Moto r loc k
Moto r stuc k OF F
Moto r stuc k O N
Fail-saf e rela y
Ignitio n voltag e
Differen t diamete r tir e
Centra l Processin g Uni t (CPU ) diagnosis , an d
ROM/RA M diagnosi s DETECTIO
N
TIMING
O
0
O
O
O
O
0
O
0
O
O
0
O
O
O
PROBLE M
LOCATIO N
FR
FL
R R
RL
FR
FL
R R
RL
FR
FL
R R
R L
FR-I N
FR-OU T
FL-IN
FL-OU T
RR-IN
RR-OU T
RL-IN
RL-OU T
FR
FL
R R
RL
FAIL -
SAFE
MOD E
L
O
0
O
O
O
O
REFE R
TO
PAG E
19-12 2
19-124
19-126
19-127
19-12 8
19-129
19-13 2
19-133
19-13 4
19-13 7
19-13 9
19-14 1
19-142
19-142
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Troubleshooting
ABS Indicato r Doe s No t Com e O n
AB S indicato r doe s no t com e o nwhe n th e ignitio n switc h i sturne d O N (II) .
Chec k th e indicato r powe r
sourc e circuit :
Turn th e ignitio n switc h O N (II) .
Doe s th e brak e syste m indi -cato r com e on ?
Chec k th e AB S contro l unit :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e AB S contro lunit 12 P connector .3. Tur n th e ignitio n switc h O N (II) .
Doe s th e AB S indicato r
com e on ?
Is th e bul b OK ?
Chec k fo r a shor t t o bod y groun d
i n th e WAL P circuit :
1 . Disconnec t th e gaug e assem -
bl y 30 P connector .
2 . Chec k fo r continuit y betwee n
termina l No . 2 2 an d bod yground .
I s ther e continuity ?
(T o pag e 19-123 ) Gaug
e rela y stuc k OFF .
Blow n METE R (1 5 A ) fus e in th e
under-hoo d fuse/rela y box .
Blow n METE R (7. 5 A ) fus e i n
th e under-das h fuse/rela y box .
Repai r ope n in th e wir e betwee n
th e METE R (1 5 A ) fus e an d th e
gaug e assembly .
Repai r ope n i n th e wir e
betwee n th e METE R (7. 5 A )
fus e an d bod y ground .
Replac e th e under-hoo d fuse /
rela y bo x o r under-das h fuse /
rela y box . (Ope n circui t insid e
the box. )
Chec k fo r loos e AB S contro l uni t
connectors . I f necessary , substi -
tut e a known-goo d AB S contro l
uni t an d recheck .
Replac e th e AB S indicato r bulb .
GAUGE ASSEMBL Y 30 P CONNECTO R
Repai r shor t t o bod y groun d in th e
wir e betwee n th e gaug e assembl y
and th e AB S contro l unit .Wire sid e o f femal e terminal s
Chec
k th e AB S indicato r bul b i n
th e gaug e assembly .
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(From pag e 19-122 )
Chec k fo r a n ope n i n th e indica -
to r GN D circuit :
1 . Tur n th e ignitio n switc h OFF .
2 . Connec t th e gaug e assembl y
30P connector .
3 . Connec t th e gaug e assembl y
22 P connecto r termina l No . 1 0
t o bod y groun d wit h a jumpe r
wire.4. Tur n th e ignitio n switc h O N (II) .
Doe s th e AB S indicato r com e on ? GAUG
E ASSEMBL Y 22 P CONNECTO R
WIRE
Wire sid e o f femal e terminal s
Repai r ope n in th e wir e betwee n
th e gaug e assembl y an d bod y
ground .Repair poo r groun d (G401 ,G402).
Replac e th e printe d circui t boar d
i n th e gaug e assembly .
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Troubleshooting
ABS Indicato r Doe s No t G o Of f (N o DTC )
Is th e fus e OK ?
Chec k fo r a n ope n i n th e GN D
circuit :
1. Connec t th e AB S contro l uni t22P connecto r termina l No . 1to bod y groun d wit h a jumpe rwire.2. Tur n th e ignitio n switc h O N (II) .
Doe s th e AB S indicato r g o off ?
Chec k fo r a n ope n in th e IG 2 cir -
cuit :Measur e th e voltag e betwee n th eAB S contro l uni t 22 P connecto rterminal No . 1 1 an d bod y ground .
Is ther e batter y voltage ?
Chec k th e AB S contro l unit :
Connec t th e AB S contro l uni t 12 Pconnecto r termina l No . 1 to bod ygroun d wit h a jumpe r wire .
Does th e AB S indicato r g o off ?
(T o pag e 19-125 ) Replac
e th e fus e an d recheck .
ABS CONTRO L UNI T 22 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 AB S contro l uni t an d bod y
ground .
Repai r poo r groun d (G404) .
Repai r ope n in th e wir e betwee n
th e R/ C MIRRO R (7. 5 A ) fus e an d
th e AB S contro l unit .
Chec k fo r loos e AB S contro l uni t
connectors . I f necessary , substi -
tut e a known-goo d AB S contro l
unit an d recheck .
Wire sid e o f femal e terminal s
AB
S CONTRO L UNI T 12 P CONNECTO R
JUMPE R
WIRE
JUMPE R
WIR E
With engin e running , th e AB Sindicato r i s ON .
Wit h th e SC S servic e connec -
to r connecte d (se e pag e
19-119 ), n o DT C is indicated .
Chec k th e R/ C MIRRO R (7. 5 A ) fus e
i n th e under-das h fuse/rela y box ,
an d reinstal l th e fus e if i t i s OK .
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(From pag e 19-124 )
Chec k fo r a n ope n in th e WAL P
circuit :
Connec t th e gaug e assembl y 30 P
connecto r termina l No . 2 2 t obod y groun d wit h a jumpe r wire .
GAUG E ASSEMBL Y 30 P CONNECTO R
Doe s th e AB S indicato r g o off ? Repai
r ope n in th e wir e betwee n
th e gaug e assembl y an d th e
AB S contro l unit . Wir
e sid e o f femal e terminal s
Replac e th e printe d circui t boar d
i n th e gaug e assembly .
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Troubleshooting
DTC 11 , 13 , 15 , 17 : Whee l Senso r (Open/Shor t t o Bod y Ground/Shor t t o Power )
With th e ignitio n switc h O N
(II) , th e AB S indicato r doe s
not g o off .With th e SC S servic e connec -
to r connecte d (se e pag e
19-119 ), DTC s 11 , 13 , 15 , 1 7 ar e
indicated .
Chec k fo r a shor t t o powe r i n th e
whee l senso r circuit :
1 . Disconnec t th e AB S contro l
unit 22 P connector .2. Star t th e engine .
3 . Measur e th e voltag e betwee n
th e appropriat e whee l senso r
(+) circui t termina l an d bod ygroun d (se e table) .
DTC
11 (Right-front )
13 (Left-front )
15 (Right-rear )
17 (Left-rear )
Appropriat e Termina l
(+) Sid e
No. 9 : FR W (+)
No . 7 : FL W (+ )
No . 19 : RR W (+ )
No . 17:RLW(+ )
(-) Sid e
No. 8 : FR W (-)
No . 6 : FL W (-)
No . 20 : RR W (-)
No . 18 : RL W (-)
Is ther e 2 V or more ?
NOTE : Judgemen t valu e fo r shor t t o
powe r i s 2 V . Repai
r shor t t o powe r i n th e (+ )
circui t wir e betwee n th e AB S
contro l uni t an d th e appropriat e
whee l sensor .
Chec k fo r a shor t t o bod y groun d
i n th e whee l senso r circuit :
Check fo r continuit y betwee n th eappropriat e whee l senso r (+ ) cir -cuit termina l an d bod y groun d(see table) .
I s ther e continuity ?
Chec k fo r a n ope n i n th e whee l
senso r circuit :
Chec k th e resistanc e betwee n th e
appropriat e whee l senso r (+ ) an d
(-) circui t terminal s (se e table) .
Is th e resistanc e OK ?Front/Rear : 45 0 - 2,05 0
(a t 20°C , 68°F) .
Check fo r loos e AB S contro l uni tconnectors , i f necessary , substi -tute a known-goo d AB S contro lunit an d recheck . Repai
r shor t t o bod y groun d in
th e (+ ) o r (- ) circui t wir e betwee n
the AB S contro l uni t an d th eappropriat e whee l sensor .
Replac e th e appropriat e whee l
sensor .
Repair ope n i n the (+) o r (- )
circui t wire , o r shor t t o th e (+ )
circui t wir e i n th e (- ) circui t
wir e betwee n th e AB S contro l
uni t an d th e appropriat e whee l
sensor .
Replac e th e appropriat e whee l
sensor . AB
S CONTRO L UNI T 22 P CONNECTO R
Wir e sid e o f femal e terminal s
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DTC 12 , 14 , 16 , 18 : Whee l Senso r (Electrica l Noise/Intermitten t Interruption )
Are the y installe d correctly ?
Chec k fo r a shor t t o wir e i n th e
on e whee l senso r circuit :
1 . Disconnec t th e AB S contro l
uni t 22 P connector .
2 . Measur e th e resistanc e
between th e appropriat ewheel senso r (+ ) an d (- ) cir -
cui t terminal s (se e table) .
I s ther e les s tha n 45 0 Q ?
Chec k fo r a shor t t o anothe r wir e
i n th e whee l senso r circuits :
Chec k fo r continuit y betwee n th e
appropriat e whee l senso r (+ ) cir -
cuit termina l an d othe r whee lsensor (+ ) circui t terminal s (se e
table) .
Is ther e continuity ? NOTE
: I f th e AB S indicato r come s o n fo r th e reason s describe d below , th e indicato r
shoul d g o of f whe n yo u test-driv e th e vehicl e 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
DTC
12
1 4
16
18
Appropriat e Whee l Senso r
Right -fron t
Left - fron t
Right - rea r
Lef t - rea r
Reinstal l o r replac e th e appropri -
at e whee l senso r o r pulser .
DTC
12 (Right-front )
1 4 (Left-front )
1 6 (Right-rear )
1 8 (Left-rear )
Appropriat e Termina l
(+) Sid e
No. 9 : FR W (+ )
No . 7 : FL W (+ )
No . 19 : RR W (+ )
No . 17 : RL W (+ )
(-) Sid e
No. 8 : FR W (-)
No . 6 : FL W (-)
No . 20 : RR W <- )
No . 18 : RL W (-)
Repai r shor t t o wir e betwee n th e
appropriat e whee l senso r (+ ) an d
(- ) circuits .
DTC
12 (Right-front )
14 (Left-front )
16 (Right-rear )
18 (Left-rear )Appropriat
e
Termina l
No. 9 : FR W (+ )
No . 7 : FL W (+ )
No . 19 : RR W (+ )
No . 17 : RL W (+ )
Othe r Termina l
No. 7 : FL W (+ )
No . 9 : FR W (+ )
No . 9 : FR W (+ )
No . 9 : FR W (+ )
No . 19 : RR W (+ )
No . 19 : RR W (+ )
No . 7 : FL W (+ )
No . 7 : FL W (+ )
No . 17 : RL W (+ )
No . 17 : RL W (+ )
No . 17 : RL W (+ )
No . 19 : RR W (+ )
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 .
Wit
h th e ignitio n switc h O N
(II) , th e AB S indicato r doe s
not g o off .With th e SC S servic e connec -
to r connecte d (se e pag e
19-119 ), DTC s 12 , 14 , 16 , o r 1 8are indicated .
Visually chec k fo r appropriat ewheel senso r an d pulse r installa -
tio n (se e table) .
Eras e th e DT C an d test-driv e th e
vehicle . I f AB S indicato r conie s
o n an d sam e DT C is indicated ,
replac e th e AB S contro l unit .
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