1996 ACURA RL KA9 Service Repair Manual

(From pag e 11-70 )
I s th e fus e OK ?
NO
Is th e fus e OK ?
YES
Chec k fo r a n ope n i n th e wire s
(IG P lines) :
1 . Disconnec t th e fue l injecto r
an d IA C valv e connectors .
2. Tur n th e ignitio n switc h O N (II) .3. Measur e voltag e betwee n
bod y groun d an d th e PC M
connecto r terminal s A1 3 an d
B1 individually .
Is ther e batter y voltage ?
YES
Repai r shor t i n th e wir e
betwee n No . 6 EC U (PCM ) (2 0
A ) fus e an d PGM-F I mai n
relay.Repai r shor t i n th e wir e
betwee n PGM-F I mai n rela y
an d th e PCM , fue l injectors ,
o r IA C valve .
Repai r shor t i n th e wir ebetwee n fue l injector s an d
IA C valve .
Replac e No . 6 EC U (PCM ) (2 0
A)fuse .
Repair shor t i n th e wir e
betwee n No . 2 5 IG COI L (3 0 A )
fus e an d PGM-F I mai n relay .
Replac e No . 2 5 IG COI L (3 0 A )
fuse .
Repai r ope n i n th e wire(s )
betwee n th e PC M (A13 , B9 )
an d PGM-F I mai n relay .
Chec k fo r a poo r connectio n
o r loos e wire s a t th e PGM-F I
mai n relay .
Test th e PGM-F I mai n relay .Repai r shor t o r ope n i n th e
wir e betwee n th e immobilize r
uni t an d PCM .
(T o pag e 11-72 )
Inspec
t No . 2 5 IG COI L (3 0 A ) fus e
in th e under-das h fuse/rela y box .
Inspec t No . 6 EC U (PCM ) (2 0 A )
fus e i n th e under-das h fuse/rela y
box.
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PGM-FI Syste m
MIL Circui t Troubleshootin g (cont'd )
(From pag e 11-71 )
Chec k fo r a n ope n i n th e wire s
(PG , L G lines) :
1 . Reconnec t th e fue l injecto r
an d IA C valv e connectors .
2 . Measur e voltag e betwee n
body groun d an d th e PC Mconnecto r terminal s A12 , A25 ,A26, an d 6 9 individually .
Is ther e les s tha n 1. 0 V ?
YE S
Chec k fo r a shor t i n th e wire s
(VCC1 , VCC 2 lines) :
Measur e voltag e betwee n bod y
groun d an d th e PC M connecto r
terminals DI D an d 02 1 individu -ally.
Is ther e abou t 5 V ?NO
YE S
Substitut e a known-goo d PC M
an d recheck . I f symptom/indica -
tio n goe s away , replac e th e origi -
nal PCM .
PCM CONNECTO R A (26P )
LG1(BRN/BLK )
Repair ope n i n th e wire(s )
betwee n th e PC M an d G10 1 tha t
ha d mor e tha n 1. 0 V .
Chec k fo r a shor t i n a sensor :
Whil e measurin g voltag e betwee n
bod y groun d an d th e PC M con -
necto r terminal s D1 0 an d D2 1
individually , disconnec t th e 3 Pconnecto r o f eac h senso r on e a ta time .— MA P senso r
— T P senso r
— EG R valv e lif t senso r
— Fue l tan k pressur e senso r
— VS A contro l valv e angl e senso r
I s ther e abou t 5 V ?
NO
Chec k fo r a shor t i n th e wire s
(VCC1 , VCC 2 lines) :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e EC M connec -tor D (22P) .3. Chec k fo r continuit y betwee nbody groun d an d EC M con -necto r terminal s D1 0 an d D2 1individually .
Is ther e continuity ?
NO
Substitut e a known-goo d PC M
an d recheck . I f symptom/indica -
tio n goe s away , replac e th e origi -
nal PCM .
Wire sid e o f femal e terminal s
Replac e th e senso r tha t ha d
abou t 5 V .
Repai r shor t i n th e wir e betwee n
th e MA P sensor , T P sensor , EG R
valv e positio n sensor , fue l tan k
pressur e senso r o r VS A contro l
valve angl e senso r an d PCM .
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Check th e Diagnosti c Troubl e
Cod e (DTC) :
1. Tur n th e ignitio n switc h OFF .2. Connec t th e sca n too l o r th eHDS .3. Tur n th e ignitio n switc h O N (II) .4. Rea d th e DT C wit h th e sca ntool o r th e HDS .
Are an y DTC(s ) indicated ? G
o t o th e DT C Troubleshootin g
Inde x (se e pag e 11-41) .
NO
Chec k fo r a shor t i n th e wir e
(SC S line) :
1 . Tur n th e ignitio n switc h OFF .
2. Tur n th e ignitio n switc h O N (II) .3. Measur e voltag e betwee n
PC M connecto r termina l C 5
and bod y ground .
PCM CONNECTO R C (12P )
SCS (RED )
Wire sid e o f femal e terminal s
I s ther e abou t 5 V (o r batter y
voltage) ?
Repair shor t i n th e wir e betwee n
th e servic e chec k connector , dat a
lin k connecto r an d PC M (C5) .
YES
DAT A LIN K CONNECTO R (DLC )
Termina l sid e o f femal e terminal s
I s ther e continuity ? Repair
short in the wire between
the DL C an d PC M (D4) .
NO
(T o pag e 11-74 )(cont'd )
(From pag e 11-70 )
Chec k fo r a shor t i n th e wir e
(K-line) :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e PC M connecto rD (22P) .3. Chec k fo r continuit y betwee n
th e Dat a lin k connecto r (DLC )
16 P connecto r termina l No . 7
an d bod y ground .
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