1996 ACURA RL KA9 Service Repair Manual

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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