1996 ACURA RL KA9 Service Repair Manual

PGM-FI Syste m
Engine Coolan t Temperatur e (ECT ) Senso r (cont'd )
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0117 : A lo w voltag e (hig h temperature ) proble m in th e
Engin e Coolan t Temperatur e (ECT ) senso r circuit .
— Th e MI L ha s bee n reporte d on .
— DT C P011 7 is stored .
Proble m verification :
1. Tur n th e ignitio n switc h O N (II) .2. Chec k th e EC T wit h th e sca ntool.
ls302° F (150°C ) o r highe r (o r
H-Limi t i n Hond a mod e o f
PG M Tester ) o r 0 V indicated ?
YES
Chec k fo r a shor t i n th e EC T sen -sor:1. Disconnec t th e EC T senso r
connector .
2 . Chec k th e EC T wit h th e sca n
tool.
ls302° F (150°C ) o r highe r (o r
H-Limi t i n Hond a mod e o f
PG M Tester ) o r 0 V indicated ?
YES
Chec k fo r a shor t i n th e wir e
(EC T line) :
1 . Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e PC M connec -
tor D (22P) .3. Chec k fo r continuit y betwee nNo. 2 termina l o n th e EC Tsenso r connecto r an d bod y
ground .
NO
Intermitten t failure , syste m is O K
a t thi s time . Chec k fo r poo r con -
nection s o r loos e wire s a t C251 ,
C25 4 (locate d a t lef t shoc k tower) ,
C12 8 (EC T sensor) , C53 1 (climat e
contro l unit ) an d PCM .
Replac e th e EC T sensor .
ECT SENSO R CONNECTO R (C128 )
I s ther e continuity ?
YES
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 nor -
ma l EC T is indicated , replac e th e
origina l PCM .
Wire sid e o f femal e terminal s
Is ther e continuity ? Repai
r shor t i n th e wir e betwee nPCM (D7 ) an d EC T sensor .
Replace th e climat e contro l unit .
NO
YE S
Chec k th e climat e contro l uni tcircuits :1. Tur n th e ignitio n switc h OFF .2. Disconnec t 20 P connecto r
fro m th e climat e contro l unit .
3 . Chec k fo r continuit y betwee n
No . 2 termina l o n th e EC T
senso r connecto r an d bod y
ground .
NO
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The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0118 : A hig h voltag e (lo w temperature ) proble m in th e
Engin e Coolan t Temperatur e (ECT ) senso r circuit .
— Th e MI L ha s bee n reporte d on .
— DT C P011 8 is stored .
Proble m verification :
1 . Tur n th e ignitio n switc h O N (II) .
2 . Chec k th e EC T wit h th e sca n
tool.
Is -4° F (-20°C ) o r les s (o r L -
Limi t i n Hond a mod e o f PG M
Tester ) o r 5 V indicated ?
YES
Chec k fo r a n ope n in th e EC T sen -sor:1. Disconnec t th e EC T senso r
connector.
2 . Instal l a jumpe r wir e betwee n
th e tw o terminal s o n th e har -
ness sid e o f th e EC T senso rconnector .
3 . Chec k th e EC T wit h th e sca n
tool.
Is -4° F (-20°C ) o r les s (o r L -
Limi t i n Hond a mod e o f PG M
Tester ) o r 5 V indicated ?
YES
Chec k fo r a n ope n i n th e wire s
(ECT , SG 2 lines) :
1. Tur n th e ignitio n switc h OFF .2. Instal l a jumpe r wire betwee nD7 an d D2 2 o n th e PC M con -nector .3. Tur n th e ignitio n switc h O N (II) .4. Chec k th e EC T wit h th e sca ntool.
Is -4° F (-20°C ) o r les s (o r L -
Limi t i n Hond a mod e o f PG M
Tester ) o r 5 V indicated ?
YES
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 nor -
ma l EC T is indicated , replac e th e
origina l PCM . Intermitten
t failure , syste m is O K
a t thi s time . Chec k fo r poo r con -
nection s o r loos e wire s a t C251 ,
C25 4 (locate d a t lef t shoc k tower) ,
C128 (EC T sensor ) an d PCM .
ECT SENSO R CONNECTO R (C128 )
SG2(GRN/BLU )
JUMPE R WIR E
Replac e th e EC T sensor .
ECT(RED/WHT )
Wire sid e o f femal e terminal s
Repai r ope n in th e wire s betwee n
PC M (D7 , D22 ) an d EC T sensor . Wir
e sid e o f femal e terminal s
SG2(GRN/BLK )
JUMPER WIR E
PC
M CONNECTO R D (22P )
EC T (RED/WHT )
NO
N O
NO
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PGM-FI Syste m
Throttl e Positio n (TP ) Senso r
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0122 : A lo w voltag e proble m in th e Throttl e Positio n
(TP) senso r circuit .
The T P Senso r i s a potentiometer . I t i s connecte d t o th e throttl e valv e shaft . A s th e throttl e positio n changes , th e throttl e
position senso r varie s th e voltag e signa l t o th e PCM .
— Th e MI L ha s bee n reporte d on .
— DT C P012 2 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 (i n Par k o r neutral ) unti l
th e radiato r fa n come s on ,
the n tur n th e ignitio n switc h
OFF.2. Turn the ignition switch ON (II).3. Chec k th e throttl e positio n
wit h th e sca n tool .
I s ther e approx . 10 % whe n
the throttl e is full y close dand approx . 90 % whe n th e
throttl e is full y opened ?
NO
Chec k fo r a n ope n i n the wire
(VCC 2 line) :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e T P senso r con -
nector .
3 . Tur n th e ignitio n switc h O N (II) .
4 . Measur e voltag e betwee n
No. 1 termina l an d No . 3 termi -nal o n th e T P senso r connector . BRUS
H
HOLDE R
BRUS H
RESISTO R
YES
Is ther e abou t 5 V ?NO
YE S
Chec k fo r a n ope n o r shor t i n T Psensor :1. Tur n th e ignitio n switc h OFF .
2 . Measur e resistanc e betwee n
No . 1 termina l an d No . 2 ter -
mina l o n th e senso r sid e o f
T P senso r connecto r wit h th e
throttl e full y closed .
(T o pag e 11-81 )
*: wit h TC S*1: wit h VS A TERMINA
L
INNERBUSHIN GIDLEFUL LTHROTTL E
THROTTLEOPENING
Intermitten t failure , syste m is O K
a t thi s time . Chec k fo r poo r con -
nection s o r loos e wire s a t C11 3
(T P sensor ) C251 , C253 , C25 4
(locate d a t lef t shoc k tower) ,
C62 3 (TC S contro l unit) * C45 0
(VS A converte r unit)*
1 an d PCM . T
P SENSO R CONNECTO R (C113 )
Wir e sid e o f femal e terminal s
Chec k fo r a n ope n in wir e (VCC2 ,
line):Measur e voltag e betwee n D2 1
termina l an d D2 2 termina l o n th e
PC M connector . Wir
e sid e o f femal e terminal s
I s ther e abou t 5 V ? Repai
r ope n in th e wir e betwee n
PCM (D21 ) an d T P sensor .
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 pre -
scribe d voltag e is no w available ,
replac e th e origina l PCM .Termina l sid e o fmal e terminal s
YES
PCM CONNECTO R D (22P )
OUTPU
T VOLTAG E (V )
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