1996 ACURA RL KA9 fuse box

Idle Contro l Syste m
Brake Peda l Positio n Switc h Signa l
Are th e brak e light s o n withou t
depressin g th e brak e pedal ? Inspec
t th e brak e peda l positio n
switc h (se e sectio n 19 ).
N O
Depres s th e brak e pedal .
D o th e brak e light s com e on ?
YES
Is th e fus e OK ?NO
Chec k fo r a n ope n i n th e wir e
(BKS W line) :
1 . Depres s th e brak e pedal .
2 . Measur e voltag e betwee n PC M
connecto r terminal s E 2 an d
A2 6 wit h th e brak e peda l de -
pressed . —
Repai r shor t i n th e wire be-
twee n th e brak e peda l posi -
tio n switc h an d th e STO P
HOR N (1 5 A ) fuse .
— Replac e th e STO P HOR N (1 5 A )
fuse .
Wire sid e o f femal e terminal s
I s ther e batter y voltage ? Repai
r ope n in th e wir e betwee n
th e PC M (E2 ) an d th e brak e peda l
positio n switch .
Brak e peda l positio n switc h sig -
nal i s OK .
YES
NO
— Repai r ope n i n th e wir e be -
twee n th e brak e peda l posi -
tio n switc h an d th e STO P
HOR N (1 5 A ) fuse .
— Inspec t th e brak e peda l posi -
tio n switc h (se e sectio n 19 ).
PC M CONNECTOR S
YES
NOInspec t th e STO P HOR N (1 5 A )
fus e i n th e under-hoo d fuse / rela y
box.
YES
Inspectio n o f Brak e Peda l Positio n
Switc h Signal .
This signal s th e PC M whe n th e brak e peda l i s depressed .
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Fuel Suppl y Syste m
Fuel Pressur e Regulato r (cont'd )
(From pag e 11-137 )
Chec k fo r a n ope n i n th e wir e
(IG 1 line) :
Measur e voltag e betwee n th e
contro l bo x 4 P connecto r termi -
nal No . 4 an d bod y ground .
Is ther e batter y voltage ?
YES
CONTRO L BO X4P CONNECTO R (C257 )
IG1(BLK/YEL )
Repair ope n i n wir e betwee nNo. 2 0 EC U (PCM ) (2 0 A ) fus e i nth e under-das h fuse/rela y bo x
an d th e 4 P connector . Wir
e sid e o f femal e terminal s
PC M CONNECTO R A (26P )
Wir e sid e o f femal e terminal s
I s ther e manifol d vacuum ? Repai
r ope n i n wir e betwee n
PC M (A10 ) an d th e 4 P connector .
NO
Fue l Pressur e Regulato r Contro l
Solenoi d Valv e is OK .
YES
FPRC S(RED/GRN)
JUMPE RWIRE
Chec k fo r a n ope n i n th e wir e(FPRC S line) :1. Tur n th e ignitio n switc h OFF .
2 . Reconnec t th e 4 P connecto r
t o th e contro l box .
3 . Star t th e engin e an d allo w it
to idle .4. Connec t PC M connecto r ter -
mina l A1 0 an d bod y groun d
wit h a jumpe r wire .
NO
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Fuel Suppl y Syste m
Fuel Pum p Rela y (cont'd )
(From pag e 11-139 )
FUEL PUM P RELA Y 4P CONNECTO R
(C667)
Check fo r ope n in th e fue l pum prelay:1. Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e PC M connec -
to r C (12P ) fro m th e PCM .
3 . Disconnec t th e 4 P connecto r
fro m th e fue l pum p relay .
4 . Connec t fue l pum p rela y con -
necto r terminal s No . 2 to No . 4wit h a jumpe r wire* .5. Tur n th e ignitio n switc h O N (II) .
6 . Measur e voltag e betwee n
PC M connecto r termina l C 4
an d bod y ground . CAUTION
: * th e PC M connecto r C (12P )
mus t b e disconnecte d fo r thi s tes t o r
th e PC M wil l b e damaged .
Wire sid e o f femal e terminal s
I s ther e batter y voltage ?
Replace th e fue l pum p relay .
NOWir e sid e o f femal e terminal s
Chec k fo r a n ope n in th e wire :
1 . Remov e th e jumpe r wire .
2 . Measur e voltag e betwee n th e
fue l pum p rela y 4 P connecto r
termina l No . 2 an d bod y
ground .
I s ther e batter y voltage ? Repai
r ope n in wir e betwee n th e
fue l pum p rela y an d th e No . 2 2
FUE L PUM P (2 0 A ) fus e i n th e
under-das h fuse/rela y box .
Repai r ope n o r shor t i n wir e
betwee n PC M (C4 ) an d th e fue l
pum p relay .
YES
NO
YE S
PCM CONNECTO R C (12P )
JUMPE
R
WIRE
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Fuel Gaug e
Testin g
NOTE : Refe r t o sectio n 2 3 fo r th e fue l gaug e syste m cir -
cuit .
1 . Chec k th e No . 1 3 METE R (7. 5 A ) fus e i n th e under -
dash fuse/rela y box , METE R (1 5 A ) fus e in th e under -
hood fuse/rela y bo x an d gaug e rela y befor e testing .
2. Remov e th e rea r sea t cushio n (se e sectio n 20 ).
3 . Remov e th e acces s pane l fro m th e floor .
ACCES SPANEL
FUEL GAUG ESENDIN G UNI T
4. Disconnec t th e 3 P connecto r fro m th e fue l gaug e
sendin g unit .
5. Measur e voltag e betwee n th e 3 P connecto r termi -
nal s No . 1 an d No . 2 wit h th e ignitio n switc h O N (II) .
Ther e shoul d b e betwee n 5 an d 8 V .
FUE L GAUG E SENDIN G UNI T CONNECTO R(C723)
Wire sid e o f femal e terminal s
If th e voltag e is a s specified , g o t o ste p 6 .
I f th e voltag e is no t a s specified , chec k for :
— an ope n in th e BLU/GR N o r BL K wire .
— poo r groun d (G652) . (cont'd )
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Low Fue l Indicato r Syste m
Indicato r Ligh t Testin g
1 . Chec k th e No . 1 3 METE R (7. 5 A ) fus e i n th e under -
dash fuse/rela y box , METE R (1 5 A ) fus e in th e under -
hood fuse/rela y bo x an d gaug e rela y befor e testing .
2. Par k the vehicl e o n leve l ground .
D o no t smok e whil e workin g o n th e
fue l system . Kee p ope n flam e awa y fro m th e wor k
area . Drai n fue l onl y int o a n approve d container .
• I f th e ligh t come s o n withi n 4 minutes , g o t o ste p
8.
• I f th e ligh t doe s no t com e o n withi n 4 minutes ,
go t o ste p 5 .
5 . Remov e th e rea r sea t cushio n (se e sectio n 20 ).
6 . Remov e th e fue l tan k acces s pane l fro m th e floor ,
an d disconnec t th e 3 P connecto r fro m th e fue l gaug e
sendin g unit .
7. Connec t th e No . 1 an d No . 3 terminal s wit h a jumpe r
wire.
• i f th e ligh t come s on , chec k th e sendin g unit .
• I f th e ligh t doe s no t com e on , chec k for :
— an ope n in th e BLU/RE D wir e betwee n th e fue l
uni t an d fue l gaug e assembly .
— blow n bulb .
— poo r groun d (G652) .
FUEL GAUG E SENDIN G UNI T CONNECTO R IC723 )
should g o of f withi n fou r minutes .
8. Ad d 4of fue l (1. 1 U.S . Gal . 0. 9 Imp . Gal) . Th e ligh t
3. Drai n th e fue l int o a n approve d container . The n
instal l th e drai n bol t wit h a ne w washer .
4.
an d tur n th e ignitio n switc h O N (II) . Th e lo w fue l indi -
cato r ligh t shoul d com e o n withi n 4 minutes .
Add les s tha n 8. 5(2. 2 U.S . Gal . 1. 8 Imp . Gal ) o f fuel ,
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Troubleshooting Flowchar t
Check fo r a n ope n o r shor t i n th e
wir e (BA T line) :
Measur e voltag e betwee n th e
PGM-F I mai n rela y 4 P connecto r
termina l No . 3 an d bod y ground .
I s ther e batter y voltage ?
YES
Chec k fo r a n ope n o r shor t i n th e
wir e (IGS W line) :
1 . Tur n th e ignitio n switc h O N (II) .
2 . Measur e voltag e betwee n th e
PGM-F I mai n rela y 8 P connec -
to r termina l No . 5 an d bod y
ground .
I s ther e batter y voltage ?
YES
(To pag e 11-148 ) PGM-F
I MAI N RELA Y 8P CONNECTO R (C433 )
Wir e sid e o f femal e terminal s
NORepai r ope n in th e wir e betwee n
th e PGM-F I mai n rela y an d G10 1
(locate d a t middl e o f engine) .
NO
Repai r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e No . 6 EC U
(PCM ) (2 0 A ) fuse .
Replac e th e No . 6 EC U (PCM )
(2 0 A ) fus e in th e under-das h
fuse/rela y box . PGM-F
I MAI N RELA Y 4P CONNECTO R (C432 )
Wir e sid e o f femal e terminal s
NO
Repai r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e No . 2 2
FUE L PUM P (2 0 A ) fuse .
Replac e th e No . 2 2 FUE L PUM P
(2 0 A ) fus e in th e under-das h
fuse box .
YES
Is ther e continuity ?
Engin
e wil l no t start .
Inspectio n o f PGM-F I mai n
rela y an d rela y harness .
Chec k fo r a n ope n in th e wir e (PG 1
line) :1. Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e PGM-F I mai n
rela y 4 P connecto r an d 8 P
connector .
3 . Chec k fo r continuit y betwee n
th e PGM-F I mai n rela y 8 P
connecto r termina l No . 7 an d
bod y ground .
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Fuel Suppl y Syste m
PGM-F I Mai n Rela y (cont'd )
(From pag e 11-147 )
Chec k fo r a n ope n i n th e wir e
(IGS W line) :
Measur e voltag e betwee n th e
PGM-F I mai n rela y 4 P connecto r
termina l No . 4 an d bod y ground .
I s ther e batter y voltage ?
YES
Chec k fo r a n ope n o r shor t i n th e
wir e (ST S line) :
1. Tur n th e ignitio n switc h to th eSTAR T (III ) positio n (trans -mission in o r position) .2. Measur e th e voltag e betwee n
th e PGM-F I mai n rela y 8 P con -
necto r termina l No . 3 an d
bod y ground .
I s ther e batter y voltage ?
YES
Chec k fo r a n ope n i n th e wir e(FLR 1 line) :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e PC M connec -tor A (2 6 P ) fro m th e PCM .3. Chec k fo r continuit y betwee n
th e PGM-F I mai n rela y 8 P
connecto r termina l No . 2 an d
PC M connecto r termina l A4 . PGM-F
I MAI N RELA Y 4P CONNECTO R (C432 )
IGSW(BLK/YEL )
NO
Repai r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e No . 2 5 I G
COI L (3 0 A ) fuse .
Replac e th e No . 2 5 I G COI L
(3 0 A ) fus e in th e under-das h
fuse/rela y box . Wir
e sid e o f femal e terminal s
PGM-F I MAI N RELA Y 8 P CONNECTO R (C433 )
NO
Repai r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e No . 1 4
STARTE R SIGNA L (7. 5 A ) fuse .
Replac e th e No . 1 4 STARTE R
SIGNA L (7. 5 A ) fus e i n the
under-das h fus e box . Wir
e sid e o f femal e terminal s
I s ther e continuity ? Repai
r ope n in th e wir e betwee n
the PC M (A4 ) an d the PGM-F I
mai n relay . PC
M CONNECTO R A (26P )
Wir e sid e o f femal e terminal s
(T o pag e 11-149 )
YES
NO
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Intake Air System

System Description

The system supplies air for all engine needs. It consists of the intake air pipe. Air Cleaner, intake air duct. Throttle Body,

Idle Air Control (IAC) Valve, idle air control thermal valve, and intake manifold.

A resonator in the intake air pipe provides additional silencing as air is drawn into the system.

IMRC SOLENOID VALVE 2

IMRC

SOLENOID

VALVE 1
IMRC

VACUUM

TANK

From No. 20 ECU

(PCM)
(20 A)

FUSE

(in the under-dash

fuse/relay box)

IMRC

DIAPHRAGM

VALVE 1
VARIOUS

SENSORS

THROTTLE BODY
INTAKE

AIR

DUCT
INTAKE

MANIFOLD
IDLE

ADJUSTING

SCREW
With

TCS

IDLE AIR

CONTROL

THERMAL

VALVE
IAC

VALVE
From PGM-FI

MAIN RELAY

IMRC

DIAPHRAGM

VALVE 2
IMRC

CHECK

VALVE

ENGINE

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