1996 ACURA RL KA9 Service Repair Manual

(From pag e 11-160 ) (Fro
m pag e 11-160 )
PCM CONNECTO R A (26P )
YES
Chec k fo r a shor t i n th e wir e
(IABSC 1 line) :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e PC M connec -tor A (26P ) fro m th e PCM .3. Chec k fo r continuit y betwee n
PC M connecto r termina l A2 0
and bod y ground .
Is ther e continuity ?
NO
Substitut e a known-goo d PC M
an d rechec k (se e pag e 11-42 fo r
immobilize r information) . I f symp -
to m goe s away , replac e th e origi -
nal PCM .
Is ther e continuit y t o ground ?
NO
Substitut e a known-goo d PC Mand rechec k (se e pag e 11-42 fo r
immobilize r information) . I f symp -
to m goe s away , replac e th e origi -
nal PCM .
Wire sid e o f femal e terminal s
Repai r shor t t o groun d a t wire
betwee n PC M (A20 ) an d th e 4 Pconnector .
YESReplac e th e IMR C solenoi d valv e2.
Repai r shor t t o groun d a t wir ebetwee n PC M (A22 ) an d th e 4 Pconnector .
YES
NO
Chec k fo r a shor t i n th e wir e
(IABCS 2 line) :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e PC M connec -tor A (26P ) for m th e PCM .3. Chec k fo r continuit y betwee n
PC M connecto r termina l A2 2
and bod y ground .IMRC syste m is OK .
NO
Is ther e vacuum ? Chec
k th e IMR C Solenoi d Valv e2:Disconnec t th e 6 P connecto r fro m
th e IMRC/engin e moun t contro l
solenoi d valv e assy .
YES
Chec k fo r vacuu m at 4,00 0 rpm :
1 . Rais e engin e spee d t o 4,00 0
rpm.2. Chec k fo r vacuu m a t No . 8
vacuu m hose .
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Intake Ai r Syste m
Intake Manifol d Runne r Contro l (IMRC ) Syste m (cont'd )
Intake Manifol d Runne r Contro l (IMRC ) Valv e 1 Testin g
1 . Disconnec t th e No . 2 hos e fro m th e vacuu m hos e
manifold , an d attac h a vacuu m pum p t o th e vacuu m
hos e manifold .
IMRC SOLENOI D VALV E 1
VACUU MPUMP/GAUG E
A973 X - 04 1 -
XXXX X
2. Appl y vacuu m an d verif y tha t th e IMR C diaphrag m
hold s vacuu m an d tha t a s th e vacuu m is applie d an d
release d th e IMR C diaphrag m ro d move s in an d out .
I f th e IMR C diaphrag m doe s no t hol d vacuu m o r th e
IMR C diaphrag m ro d doe s no t mov e i n an d out ,
replac e th e IMR C diaphrag m (se e sectio n 9 ) an d retest . Intak
e Manifol d Runne r Contro l (IMRC ) Valv e 2 Testin g
1 . Disconnec t th e No . 8 hos e fro m th e vacuu m hos e
manifold , an d attac h a vacuu m pum p t o th e vacu -
u m hos e manifold .
IMRC SOLENOI D VALV E 2
No . 8 HOS E
2. Appl y vacuu m an d verif y tha t th e IMR C diaphrag m
hold s vacuu m an d tha t a s th e vacuu m is applie d
an d release d th e IMR C diaphrag m ro d move s in an d
out.
If th e IMR C diaphrag m doe s no t hol d vacuu m o r th e
IMR C diaphrag m ro d doe s no t mov e i n an d out ,
replac e th e IMRC diaphrag m (se e sectio n 9 ) an d
retest .
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Intake Ai r Bypas s Contro l Syste m
Descriptio n
Th e Intak e Ai r Bypas s Contro l syste m enable s fres h ai r
t o b e draw n throug h th e throttl e bod y an d fue l injecto r
port.
INJECTO R
AI R FLO W FRO M TH E
IDL E AI R CONTRO L THERMA L VALV E
Testing
1 . Star t th e engine . Hol d th e engin e a t 3,00 0 rp m wit h
n o loa d i n Par k o r neutra l until the radiato r fa n
come s on .
2 . Disconnec t th e vacuu m hose s an d connec t vacuu m
pum p t o th e hose s individually .
VACUUM PUMP /GAUGE , 0 - 3 0 In.H gA973 X - 04 1 -
XXXX X
3. Allo w th e engin e t o idle , an d chec k th e vacuum .
• I f n o vacuum , chec k th e vacuu m hos e routin g o f
th e intak e ai r bypas s contro l system .
• I f th e vacuum , chec k th e IA C Valv e (se e pag e
11-115 ), th e Idl e Ai r Contro l Therma l Valv e (se e
pag e 11-123 ) an d th e intak e manifol d port . I f th e
intak e manifol d por t i s clogged , clea n it wit h car -
bureto r cleaner .
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Emission Contro l Syste m
System Descriptio n
The emissio n contro l syste m include s a Thre e Wa y Cata -
lyti c Converte r (TWC) , Exhaus t Ga s Recirculatio n (EGR )
system , Positiv e Crankcas e Ventilatio n (PCV ) syste m an d
Evaporativ e Emissio n (EVAP ) system . Th e emissio n contro l
syste m is designe d t o mee t federa l an d stat e emissio n
standards .
Tailpipe Emissio n
Inspection
Do no t smok e durin g thi s procedure . Kee p
an y ope n flam e awa y fro m you r wor k area .
1 . Star t th e engine . Hol d th e engin e a t 3,00 0 rp m wit h
n o loa d (i n Par k o r neutral ) unti l th e radiato r fa n
come s on , the n le t i t idle .
2 . Connec t a tachometer .
3 . Chec k an d adjus t th e idl e speed , i f necessar y (se e
pag e 11-124 ).
4 . War m u p an d calibrat e th e C O mete r accordin g to th e
mete r manufacturer' s instructions .
5 . Chec k idl e C O wit h th e headlights , heate r blower ,
rea r windo w defogger , coolin g fan , an d ai r condition -
er off .
NOTE : (Canada ) Depres s th e parkin g brak e pedal .
Star t th e engine , the n chec k tha t th e headlight s ar e
off.
CO mete r shoul d indicat e 0.1 % maximum .
Three Wa y Catalyti c Converte r
(TWC)
Descriptio n
Th e Thre e Wa y Catalyti c Converte r (TWC) is use d t o
conver t hydrocarbon s (HC) , carbo n monoxid e (CO) , an d
oxide s o f nitroge n (NOx) in th e exhaus t gas , t o carbo n
dioxid e (CO
2), dinitroge n (N2) an d wate r vapor .
SECONDAR Y HEATE D OXYGE N SENSO R (SENSO R 2)
HOUSIN G
THREE WA Y
CATALYST S
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