ACURA RL KA9 1996 Service Repair Manual

Troubleshooting
Wheel Senso r
Diagnosti c Troubl e Cod e (DTC ) 4- 1 (Right-front) , 4- 2 (Left-front) , 4- 4 (Right-rear) , 4- 8 (Left-rear) :
Wheel Senso r Diagnosi s
The TC S indicato r ligh t come s o n whe n th e averag e spee d o f eithe r th e righ t o r lef t rea r wheel s exceed s 9 mp h (1 5 km/h )
and th e AB S contro l uni t signa l stop s fo r mor e tha n 3 seconds .
With engin e running , TC S indi -
cato r ligh t i s ON .
ABS indicato r ligh t is OFF .With th e SC S servic e connec -
to r connecte d (se e pag e
19-159 ), DTC s 4-1 , 4-2 , 4- 4 and/o r
4- 8 ar e indicated . NOTE
: Whe n bot h th e TC S indicato r
light an d th e AB S indicato r ligh t ar e ON ,troubleshoo t th e AB S first .
Confir m th e AB S DT C
('9 6 - 9 7 models : se e pag e 19-4 0
'98-9 9 models : se e pag e 19-119 )
'9 6 -9 7 models :
I s cod e 4-1 , 4-2 , 4-4 and/o r 4- 8
indicated ?
'9 8 - 9 9 models :
I s cod e 11 , 13 , 1 5 and/o r 1 7
indicated ? Perfor
m th e appropriat e AB S trou -
bleshootin g fo r th e cod e (se e pag e
19-65 o r 19-126 ).
* 1 '96-9 7 model s*2 '9 8 -9 9 model s
TC S CONTRO L UNI T 14 P CONNECTO R
Chec k fo r a n shor t t o bod y groun d
i n th e FRP , FLP , RR P and/o r RL P
circuit :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e TC S contro lunit 14 P an d AB S control unit26P o r 22 P connectors .
3 . Chec k fo r continuit y betwee n
the TC S contro l uni t 14 P con -necto r appropriat e terminal *
an d bod y ground .
Is ther e continuity ?Repair shor t t o bod y groun d i nth e wir e betwee n th e TC S con -trol uni t an d AB S contro l unit . Wir
e sid e o f femal e terminal s
Chec k th e TC S contro l unit :
1 . Connec t th e TC S control unit
connector .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Measur e th e voltag e betwee n
the TC S contro l uni t connec -tor appropriat e terminal * an dbody ground .
Is ther e abou t 5 V ?
T o pag e 19-18 3 Chec
k fo r loos e TC S contro l uni t
connectors . I f necessary , substi -
tut e a known-goo d TC S contro l
uni t an d recheck .
DT
C Appropriat e Termina l
4- 1 (Right-front ) No . 1 : FR P
4-2 (Left-front ) No . 3 : FL P
4-4 (Right-rear ) No . 5 : RR P
4- 8 (Left-rear ) No . 7 : RL P
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From pag e 19-18 2
Chec k fo r a n ope n i n th e FRP ,
FLP , RR P and/o r RL P circuit :
Measur e th e voltag e betwee n th e
AB S contro l uni t 26 P o r 22 P con -
necto r appropriat e terminal * an d
bod y ground .
I s ther e abou t 5 V ?
Chec k th e AB S contro l unit :
1. Tur n th e ignitio n switc h OFF .2. Connec t th e AB S contro l uni t
26 P o r 22 P connector .
3 . Rais e th e vehicle , an d suppor t
i t wit h safet y stands .
4 . Tur n th e ignitio n switc h O N (II) .
5 . Rotat e th e appropriat e wheel* ,
an d measur e th e voltag e
betwee n th e AB S contro l uni t
26 P o r 22 P connecto r appro -
priat e terminal * an d bod y
ground .
I s ther e abou t 2. 5 V ? *
'9 6 - 9 7 model s
DTC
4-1 (Right-front )
4- 2 (Left-front )
4-4 (Right-rear )
4-8 (Left-rear )
Appropriat e Termina l
No. 6 : FR P
No. 4 : FL P
No. 20 : RR P
No. 18 : RL P
* '9 8 - 9 9 model s
DTC
4-1 (Right-front )
4- 2 (Left-front )
4-4 (Right-rear )
4-8 (Left-rear )
Appropriat e Termina l
No. 5 : FR P
No. 3 : FL P
No. 15 : RR P
No. 13 : RL P
Repai r ope n in th e wir e betwee n
th e AB S contro l uni t an d TC S con -
tro l unit . '9
6 - 9 7 model s
AB S CONTRO L UNI T 26 P CONNECTO R
'9 8 - 9 9 model s
AB S CONTRO L UNI T 22 P CONNECTO R
Wir e sid e o f femal e terminal s
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 .
Th e syste m is O K a t thi s time .
I f th e proble m recurs , replac e
th e TC S contro l unit .
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Troubleshooting
ABS Dow n
Diagnosti c Troubl e Cod e (DTC ) 4-9 : AB S Dow n Diagnosi s
Th e TC S indicato r ligh t come s o n whe n th e vehicl e i s stopped , th e engin e i s running , an d th e signal s fro m al l fou r wheel s
ar e disconnecte d fo r mor e tha n 5 seconds .
NOTE : Whe n th e TC S indicato r ligh t doe s no t com e o n bu t DT C 4- 9 i s memorized , th e caus e ma y b e tha t th e vehicl e wa s
drive n wit h th e AB S B 2 (1 5 A ) fus e remove d o r th e DT C wa s no t erase d afte r troubleshootin g th e ABS . Test-driv e th e vehi -
cle again , and chec k whethe r the indicato r light come s on. I f th e indicato r light doe s not com e on, th e syste m is OK . Eras e
the DTC .
Does th e AB S indicato r ligh t
com e on ? Perfor
m th e AB S troubleshooting .
Chec k fo r loos e AB S contro l uni t
connectors . I f the y ar e O K an d
th e proble m recurs , replac e th e
TC S contro l unit .
Chec
k fo r AB S indicato r light :
Star t th e engine .
Wit
h engin e runnin g o r driv -
ing , TC S indicato r ligh t i s ON .
Wit h th e SC S servic e connec -
to r connecte d (se e pag e
19-159 ), DT C 4- 9 is indicated .
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Fail-safe Rela y
Diagnosti c Troubl e Cod e (DTC ) 5-1 : Fail-saf e Rela y Diagnosi s
With engin e running , TC S
indicato r ligh t i s ON .
With th e SC S servic e connec -
to r connecte d (se e pag e
19-159 ), DT C 5- 1 is indicated .
Remov e th e fail-saf e relay , an d
chec k it (se e sectio n 23 ).
I s th e rela y OK ?
Chec k fo r a shor t t o bod y groun d
i n th e FS R circuit :
1 . Disconnec t th e fail-saf e rela y
and TC S control unit 20 P con -nectors .
2 . Chec k fo r continuit y betwee n
the TC S contro l uni t 20 P con -necto r termina l No . 6 an d bod yground .
Is ther e continuity ?
Chec k th e FS R circui t insid e th e
TC S contro l unit :
1 . Connec t th e fail-saf e rela y an d
TC S contro l uni t 20 P connec -
tors .
2. Tur n th e ignitio n switc h O N (II) .3. Measur e th e voltag e betwee nthe TC S contro l uni t 20 P con -necto r termina l No . 6 an d bod yground .
Is ther e batter y voltage ?
Chec k fo r a shor t t o powe r i n th e
VP M circuit :
Measur e th e voltag e betwee n th e
TC S contro l uni t 20 P connecto rterminal No . 1 0 an d bod y ground .
Is ther e batter y voltage ?
Th e syste m is O K a t thi s time .
I f th e proble m recurs , replac e
th e TC S contro l unit . Replac
e th e fail-saf e relay .
TCS CONTRO L UNI T 20 P CONNECTO R
Wir e sid e o f femal e terminal s
Repai r shor t t o bod y groun d i n
th e wir e betwee n th e fail-saf e
rela y an d TC S contro l unit .
Replac e th e TC S contro l unit .
(Shor t circui t insid e th e unit )
Repai r shor t t o powe r i n th e wir ebetwee n th e TC S contro l uni tand fail-saf e relay .
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Troubleshooting
Ignition Switc h (IG1 ) Signa l
Diagnosti c Troubl e Cod e (DTC ) 5-2 , 5-3 : Ignitio n Switc h (IG1 ) Signa l Diagnosi s
Th e TC S contro l uni t constantl y monitor s th e IG 1 voltage . Whe n th e uni t detect s IG 1 voltag e o f 12. 5 V or less , i t turn s o n
th e TC S indicato r ligh t an d th e DT C 5- 2 i s memorized . Whe n th e uni t detect s IG 1 voltag e o f 1 9 V or more , i t turn s o n th e
TC S indicato r ligh t an d th e DT C 5- 3 is memorized .
Possibl e cause s whic h rais e th e IG 1 voltag e to 1 9 V or more :
Fault y chargin g syste m
Excessiv e voltag e fro m a batter y charge r
Connectio n t o a 24 V batter y b y booste r cable s
Proble m verification :
Star t th e engine .
Does th e TC S indicato r ligh tcom e on ? Externa
l factor(s ) ca n b e th e
cause(s ) o f th e problem . As k th e
use r fo r th e conditio n whe n th e
sympto m appears .
Chec k th e chargin g syste m (se e
sectio n 4 ).
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TCS Contro l Valv e Actuato r
Diagnosti c Troubl e Cod e 5- 4 : Initia l Moto r Operatio n Diagnosi s
5-5 : Moto r Operatio n (1 ) Diagnosi s
5-6 : Moto r Operatio n (2 ) Diagnosi s
5-7 : Ove r Limi t Moto r Curren t Diagnosi s
5-8 : Moto r Drive r Ope n Diagnosi s
5-9 : Unde r Limi t Moto r Curren t Diagnosi s
5-10: Moto r Drive r Shorte d Diagnosi s
With engin e running , TC Sindicato r ligh t i s ON .
Wit h th e SC S servic e connec -
to r connecte d (se e pag e
19-159 ), DT C 5-4 , 5-5 , 5-6 , 5-7 , 5-8 ,5-9 and/o r 5-1 0 ar e indicated .
Chec k th e TC S (1 5 A ) fus e i n th e
under-hoo d fuse/rela y box .
I s th e fus e OK ?
Replace th e fus e an d recheck .
NOTE : Reinstal l th e
fus e i f i t i s OK .
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 fail-saf e rela y connecto r ter -
mina l No . 4 an d bod y ground .
NOTE: Star t th e engine , an d rechec k th efuse . I f th e fus e i s blown , chec k fo r ashor t t o bod y groun d in th e VP M circui tbetwee n th e fail-saf e rela y an d TC S con -trol unit .
FAIL-SAF E RELA Y CONNECTO R
Wire sid e o f femal e terminal s
I s ther e batter y voltage ? Repai
r ope n i n th e wir e betwee n
th e EC U (2 0 A ) fus e an d fail-saf e
relay .
Chec k th e fail-saf e rela y (se e
sectio n 23).
I s th e rela y OK ?
Replac e th e fail-saf e relay .TCS CONTRO L UNI T 20 P CONNECTO R
FSR (BLK/WHT )
Check fo r a n ope n in th e FS R cir -cuit :1. Tur n th e ignitio n switc h O N (II) .2. Measur e th e voltag e betwee nthe TC S contro l uni t 20 P con -necto r termina l No . 6 an d bod yground .Wire sid e o f femal e terminal s
I s ther e batter y voltage ?
T o pag e 19-18 8 Repai
r ope n i n th e wir e betwee n
th e fail-saf e rela y an d TC S con -
trol unit .
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Troubleshooting
TCS Contro l Valv e Actuato r (cont'd )
From pag e 19-18 7
Chec k fo r a n ope n in th e VP M + B
circuit :Measur e th e voltag e betwee n th efail-saf e rela y connecto r termina lNo. 2 an d bod y ground .
I s ther e batter y voltage ?
Chec k th e fail-saf e relay :
1 . Connec t th e TC S control unit
20 P connecto r termina l No . 6
an d bod y groun d wit h ajumpe r wire .2. Measur e th e voltag e betwee n
th e fail-saf e rela y connecto r ter -
mina l No . 3 an d bod y ground .
I s ther e batter y voltage ?
Chec k fo r a n ope n i n th e VP M
circuit :
Measur e th e voltag e betwee n th e
TC S contro l uni t 20 P connecto rterminal No . 1 0 an d bod y ground .
I s ther e batter y voltage ?
Chec k th e MO T circuit :
1 . Disconnec t th e jumpe r wir e
and TC S contro l uni t 20 P con -nector .2. Chec k fo r continuit y betwee ntermina l No . 1 9 an d bod yground .
Is ther e continuity ?
T o pag e 19-18 9 Repai
r ope n in th e wir e betwee n
th e TC S (1 5 A ) fus e an d fail-saf e
relay.
Replac e th e fail-saf e relay .
Repai r ope n in th e wir e betwee n
th e fail-saf e rela y an d TC S con -
trol unit .
Chec k fo r a shor t t o bod y groun din th e MO T circuit :1. Disconnec t th e TC S contro lvalve actuato r connector .2. Chec k fo r continuit y betwee ntermina l No . 1 an d bod yground .
I s ther e continuity ?
Repai r shor t t o bod y groun d i n
th e MOT + o r MOT - circui t
between th e TC S contro l uni tand TC S contro l valv e actuator .
FAIL-SAF E RELA Y CONNECTO R
Wire sid e o f femal e terminal s
TC S CONTRO L UNI T 20 P CONNECTO R
JUMPE R
WIRE
Wire sid e o f femal e terminal s
FAIL-SAF E RELA Y CONNECTO R
Wir e sid e o f femal e terminal s
TC S CONTRO L UNI T 20 P CONNECTO R
Wir e sid e o f femal e terminal s
TC S CONTRO L VALV E
ACTUATO R CONNECTO R
Wir e sid e o f femal e terminal s
Replac e th e TC S contro l valv e
assembly . (Shor t circui t insid e
th e motor )
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TCS CONTRO L UNI T 20 P CONNECTO R
Fro m pag e 19-18 8
Chec k th e MO T circuit :
Chec k fo r continuit y betwee n th e
TC S contro l uni t 20 P connecto rterminal No . 1 9 an d No . 20 .
I s ther e continuity ?
I s ther e continuity ?
Chec k th e TC S contro l valv e oper -
ation :
Connec t batter y powe r t o th e TC S
contro l valv e actuato r connecto r
terminal No . 1 , an d groun d con -necto r termina l No . 2 fo r on e sec -ond.
Chec k fo r a n ope n i n th e MO T
circuit :
1 . Disconnec t th e TC S contro l
valv e actuato r connector .
2. Chec k fo r continuit y betwee nterminal No . 1 an d No . 2 . Wir
e sid e o f femal e terminal s
TCS CONTRO L VALV EACTUATO R CONNECTO R
Wire sid e o f femal e terminal s
I s ther e continuity ?
YES (approx . 1. 5 ) Replac
e th e TC S contro l valv e
assembly . (Ope n circui t insid e
th e motor )
Repair ope n i n th e MOT + o rMOT - circui t betwee n th e TC S
contro l uni t an d TC S contro l
valv e actuator . TC
S CONTRO L UNI T 20 P CONNECTO R
PMG (BLK )
Wire sid e o f femal e terminal s
Repai r ope n in th e wir e betwee n
th e TC S contro l uni t an d bod y
ground , o r poo r groun d (G601) .
TCS CONTRO L VALV E
ACTUATO R CONNECTO R
CAUTION:
B e carefu l no t t o shor t th e terminals .
Afte r checking , disconnec t th e termi -
nals .
Doe s th e TC S contro l valv e oper -
at e smoothly ? Replac
e th e TC S contro l valv e
assembly .
Check fo r loos e TC S contro l uni t
connectors . I f necessary , substi -
tut e a known-goo d TC S contro l
unit an d recheck .
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Troubleshooting
A/T Shif t Positio n (AT-SHIFT ) Signa l
Diagnosti c Troubl e Cod e (DTC ) 6-1 : A/ T Shif t Positio n (AT-SHIFT ) Signa l Diagnosi s
— Wit h engin e running , TC S
indicato r ligh t i s ON .
— Wit h th e SC S servic e connec -
to r connecte d (se e pag e
19-159 ), DT C 6- 1 is indicated .
Chec k fo r a shor t t o bod y groun d
i n th e AT-SHIF T circuit :
1 . Disconnec t th e PC M connec -
tor E (26P ) an d TC S contro lunit 20 P connectors .
2 . Chec k fo r continuit y betwee n
th e PC M connecto r E (26P ) ter -
mina l No . 6 an d bod y ground .
I s ther e continuity ?
I s ther e abou t 4 V ? PC
M CONNECTO R E (26P )
Repai r shor t t o bod y groun d i n
th e wir e betwee n th e PC M an d
TCS contro l unit .
Wire sid e o f femal e terminal s
NOTE : Us e th e 1 0 V rang e o r a simila r
rang e in th e analo g tester .
NOTE : Us e th e 1 0 V rang e o r a simila r rang e
i n th e analo g tester .
Repai r ope n in th e wir e betwee n
th e PC M an d TC S contro l unit . TC
S CONTRO L UNI T 20 P CONNECTO R
Wir e sid e o f femal e terminal s
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Steering Angl e Senso r
Replacemen t
SCREW
CAUTION : D o no t damag e o r dro p th e steerin g angl e senso r a s it i s sensitive .
1 . Remov e th e combinatio n switc h (se e sectio n 17 ).
2 . Remov e th e circli p an d screw , the n remov e th e steerin g angl e senso r fro m th e combinatio n switch .
3 . Installatio n i s i n th e revers e orde r o f removal .
CAUTION : D o no t appl y an y greas e o r oi l t o th e steerin g angl e sensor .
4 . Perfor m th e steerin g angl e senso r syste m check .
STEERIN G ANGL E SENSO R
COMBINATIO N SWITC H
CANCE L CA M
WAV E WASHE R
SPRING
LOWER COVE RJOINT
CIRCLI P
NOTE: Whe n reassembling , alig n th e tab s o f th e join t an dcance l ca m to th e sli t o f th e steerin g angl e sensor .
Steering Angl e Senso r Syste m Chec k
1. Star t th e engine .
2 . Pus h th e TC S switc h 3 time s withi n 3 seconds .
3 . Slowl y tur n th e steerin g whee l clockwis e mor e tha n 1. 5 turns .
NOTE :
Start checkin g afte r th e steerin g whee l move s a t leas t 1. 5 turns .
Tur n th e steerin g whee l slowly , n o faste r tha n 1 tur n in 4 seconds .
4 . Pus h th e TC S switc h twic e withi n 3 seconds .
5 . Slowl y tur n th e steerin g whee l counterclockwise , an d chec k th e numbe r o f time s th e TC S indicato r ligh t flashe s afte r
th e whee l ha s move d abou t 1 turn .
NOTE :
Start countin g afte r th e steerin g whee l move s 1 turn .
Tur n th e steerin g whee l slowly , n o faste r tha n 1 tur n in 4 seconds .
Alway s maintai n th e sam e numbe r o f rotations .
Standar d numbe r o f time s th e TC S indicato r ligh t flashes : 3 time s
6 . I f ther e is a n abnormality , chec k th e troubleshootin g flowchar t (se e pag e 19-168 ).
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