1996 ACURA RL KA9 fog light

Idle Contro l Syste m
Idle Contro l Syste m
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0506 : Idl e contro l syste m RP M lowe r tha n
expected .
NOTE : I f DT C P051 1 is store d a t th e sam e tim e a s DT C P0506 , troubleshoo t DT C P051 1 first , the n troubleshoo t DT C P0506 .
Possibl e Caus e
IAC valv e mechanica l malfunctio n
Idl e ai r contro l therma l valv e malfunction
Throttl e bod y clogge d port , imprope r adjustmen t
Intak e manifol d gaske t leakag e
Intak e ai r hos e loos e o r leakin g
Vacuu m hose s leakag e
EC T senso r incorrec t outpu t
Troubleshootin g Flowchar t
— Th e MI L ha s bee n reporte d on .— DT C P050 6 is stored .
Proble m verification :
1. Star t th e engine . Hol d th eengin e a t 3,00 0 rp m wit h n oloa d (i n Par k o r neutral ) unti lthe radiato r fa n come s on ,then le t i t idle .2. Chec k th e engin e spee d a tidle wit h no-loa d conditions :headlights, blowe r fan , rea rdefogger , radiato r fan , an d ai rconditione r ar e no t operating .
Is it 65 0 ± 50 rpm ?Intermitten t failure , syste m is O Kat thi s time .
NO
(T o pag e 11-77 )
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Idle Contro l Syste m
Idle Contro l Syste m
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0507 : Idl e contro l syste m RP M highe r tha n
expected .
NOTE: I f DT C P051 1 i s store d a t th e sam e tim e a s DT C P0507 , troubleshoo t DT C P051 1 first , the n troubleshoo t DT C P0507 .
Possibl e Caus e
IA C valv e mechanica l malfunctio n
Idle ai r contro l therma l valv e malfunctio n
Throttle bod y clogge d port , imprope r adjustmen t
Intake manifol d gaske t leakag e
Intak e ai r hos e loos e o r leakin g
Vacuu m hose s leakag e
EC T senso r incorrec t outpu t
Troubleshootin g Flowchar t
— Th e MI L ha s bee n reporte d on .— DT C P050 7 is stored .
Problem verification :1. Star t th e engine . Hol d th eengin e a t 3,00 0 rp m wit h n oloa d (i n Par k o r neutral ) unti lthe radiato r fa n come s on ,then le t i t idle .2 Chec k th e engin e spee d a tidle wit h no-loa d conditions :headlights , blowe r fan , rea rdefogger , radiato r fan , an d ai rconditione r ar e no t operating .
Is it 65 0 ± 5 0 rpm ?Intermitten t failure , syste m is O Kat thi s time .
NO
(T o pag e 11-79 )
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Idle Contro l Syste m
NOTE: I f DT C P150 8 is store d a t th e sam e tim e a s DT C P0505 , troubleshoo t DT C P150 8 first , the n troubleshoo t DT C P0505 .
Possibl e Caus e
• IA C valv e mechanica l malfunctio n
• Idl e ai r contro l therma l valv e malfunctio n
• Throttl e bod y clogge d port , imprope r adjustmen t
• Intak e manifol d gaske t leakag e
• Intak e ai r hos e loos e o r leakin g
• Vacuu m hose s leakag e
• EC T senso r incorrec t outpu t
• Throttl e Positio n senso r incorrec t output *
•: '9 6 mode l onl y
— Th e MI L ha s bee n reporte d on .
— DT C P050 5 is stored .
Proble m verification :
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
(in Par k or neutral ) untilthe radiato r fa n come s on ,then le t i t idle .
2 . Wit h th e sca n tool , chec k th e
followin g item s ('9 6 mode l
only) .
— Throttl e positio n shoul d b e
abou t 10 % wit h th e throttl e
fully closed .— Engin e coolan t tempera -
tur e shoul d b e abou t 17 6 -
194° F (80-90°C) .
I f the y ar e no t withi n th e spec. ,
repai r th e fault y senso r circuit .
3 Chec k th e engin e spee d a t
idl e wit h no-loa d conditions :
headlights , blowe r fan , rea r
defogger , radiato r fan , an d ai r
conditione r ar e no t operating .
Is i t 65 0 5 0 rpm ?
NO
Is i t 60 0 rp m o r less ?
YES
Intermitten t failure , syste m is O Kat thi s time .
NO
(T o pag e 11-114 ) (T o pag e 11-114 )
YES
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0505 : Idl e contro l syste m malfunction .
Troubleshootin g Flowchar t
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Idle Contro l Syste m
Alternato r (ALT ) F R Signa l
PCM CONNECTOR S
Is ther e abou t 5 V ?
YE S
Chec k th e operatio n o f th e ALT :
1 . Tur n th e ignitio n switc h OFF .
2 . Reconnec t th e AL T GR N 4 P
connecto r t o th e ALT .
3 . 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 ,
then le t i t idle .4. Measur e voltag e betwee n PC M
connecto r terminal s D 5 an d A26 .
Doe s th e voltag e decreas e whe n
headlight s an d rea r defogge r ar e
turne d on ?
NO
Chec k fo r a n ope n in th e wir e (AL T
F line) :
1 . Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e negativ e bat -
ter y cabl e fro m th e battery .
3 . Disconnec t th e PC M connec -
tor D (22P) .4. Disconnec t th e GR N 4 P con -
necto r fro m th e ALT .
5 . Connec t th e AL T 4 P connecto r
termina l No . 4 to bod y groun d
wit h a jumpe r wire .
6 . Chec k fo r continuit y betwee n
body groun d an d PC M con -necto r termina l D5 .
I s ther e continuity ?
YES
See th e AL T inspectio n
(see sectio n 4 ).
N O
Wir e sid e o f femal e terminal s
Chec k fo r a shor t i n th e wir e (AL T
F line) :
1 . Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e negativ e bat -
ter y cabl e fro m th e battery .
3 . Disconnec t th e PC M connecto r
D (22P) .4. Chec k fo r continuit y betwee n
bod y groun d an d PC M con -
necto r termina l D5 .
I s ther e continuity ? Repai
r shor t i n th e wir e betwee n
the PC M (D5 ) and th e ALT .
NO
Substitut e a known-goo d PC Mand rechec k (se e pag e 11-4 1 fo rimmobilize r information) . I f pre -
scribe d voltag e is no w available ,
replac e th e origina l PCM .
AL T F R signa l i s OK .
ALT GR N 4 P CONNECTO R (C131 )
Repair ope n wir e betwee n th ePCM (D5 ) and th e ALT .
PCM CONNECTO R D (22P )
Wir e sid e o f femal e terminal s
NO
Wir e sid e o f femal e terminal s
YES YE
S
This signal s th e PC M whe n th e Alternato r (ALT ) i s charging .
Inspection o f AL T F R Signal .
Chec k fo r a shor t i n th e wir e (AL T
F line) :
1 . Disconnec t th e GR N 4 P con -
necto r fro m th e ALT .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Measur e voltag e betwee n PC M
connecto r terminal s D 5 an d A26 .
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Idle Contro l Syste m
Idle Spee d Settin g
Inspection/Adjustmen t
NOTE:
• Befor e settin g th e idl e speed , chec k th e followin g
items:
— Th e MI L ha s no t bee n reporte d on .
— Ignitio n timin g
— Spar k plug s
— Ai r cleane r
— PC V syste m
• (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 .
1 . Connec t a OBDI I sca n too l (se e pag e 11-40 ) o r
tachometer .
• Connec t a tachomete r t o ignite r uni t secondar y
loo p (white-taped) .
• Remov e th e rubbe r ca p fro m th e tachomete r
connecto r an d connec t a tachometer .
TACHOMETE RCONNECTORTACHOMETE R
RUBBERCAP
BATTER Y
2. 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 . 3
. Disconnec t th e IA C valv e connector .
IAC VALV E
4. I f th e engin e stalls , star t th e engin e wit h th e acceler -
ato r peda l slightl y depressed . Stabiliz e th e rp m a t
1,000 , the n slowl y releas e th e peda l unti l th e engin e
idles .
5 . Chec k idlin g unde r th e followin g conditions : head -
light s (Hi ) an d rea r defogge r on , blowe r fan , radia -
to r fan , an d ai r conditione r ar e no t operating .
Idl e spee d shoul d be :
480 5 0 rp m
(in Par k o r neutral )
Adjust th e idl e speed , i f necessary , b y turnin g th e
idl e adjustin g screw .
NOTE : Afte r adjustin g th e idl e spee d i n thi s step ,
rechec k th e ignitio n timin g (se e sectio n 4 ).
I f i t i s ou t o f spec , g o bac k t o ste p 4 .
IDL E ADJUSTIN G SCRE W
TACHOMETE
R
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PCM Memory Setting

NOTE: The PCM reset procedure and disconnecting the

battery or the BACK UP RADIO (7.5 A) fuse cancels the

PCM memory for idle control. The following procedure

is needed after the PCM reset procedure and reconnect-

ing the battery or the BACK UP RADIO (7.5 A) fuse.

1. Start the engine. Hold the engine at 3,000 rpm with

no load (in Park or neutral) until the radiator fan

comes on.

2. Let the engine idle for approx. 5 minutes under the

following conditions:

• Transmission in Park or neutral

• A/C switch OFF

• Headlights OFF

• Rear defogger OFFProCarManuals.com

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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Power Relay s
Relay Tes t
NOTE : Se e pag e 23-13 2 fo r tur n signal/hazar d rela y inpu t
test .
Normally-ope n typ e A ('9 6 - 9 7 models) :
1 . Chec k fo r continuit y betwee n th e terminals .
• Ther e shoul d b e continuit y betwee n th e No . 1
an d No . 2 terminal s whe n powe r an d groun d ar e
connecte d t o th e No . 3 an d No . 4 terminals .
• Ther e shoul d b e n o continuit y betwee n th e No . 1
an d No . 2 terminal s whe n powe r i s disconnected .Normally-ope
n typ e B :
1 . Chec k fo r continuit y betwee n th e terminals .
• Ther e shoul d b e continuit y betwee n th e No . 1
an d No . 3 terminal s whe n powe r an d groun d ar e
connecte d t o th e No . 2 an d No . 4 terminals .
• Ther e shoul d b e n o continuit y betwee n th e No . 1
an d No . 3 terminal s whe n powe r i s disconnected .
Radiato r fa n rela y
Hor n rela y
Cigarett e lighte r rela y
Powe r windo w maste r switc h rela y
Condense r fa n rela y
Sea t heate r rela y
AB S fron t fail-saf e rela y
AB S rea r fail-saf e rela y
TC S fail-saf e rela y
Revers e rela y
Fron t fo g ligh t rela y
Gaug e rela y
• Fue l pum p rela y
• Sea t heate r rela y ('9 9 - 0 1 models )
Headligh
t rela y ('9 6 - 9 8 models )
Rea r windo w defogge r rela y
AB S pum p moto r rela y
Headligh t hig h bea m rela y ('99-0 1 models )
VS A fail-saf e rela y ('0 0 - 0 1 models )
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