ACURA RL KA9 1996 Service Repair Manual

PGM-FI System
Manifol d Absolut e Pressur e (MAP ) Senso r (cont'd )
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0108 : A hig h voltag e (lo w vacuum ) proble m in th e
Manifol d Absolut e Pressur e (MAP ) sensor .
— Th e MI L ha s bee n reporte d on .
— DT C P010 8 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 neutra l unti l
th e radiato r fa n come s on , the n
let i t idle .2. Chec k th e MA P wit h th e sca ntool.
Chec k fo r a n ope n i n th e MA Psensor :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e MA P senso r
3 P connector .
3 . Instal l a junipe r wir e betwee n
th e MA P senso r 3 P connecto r
terminal s No . 3 an d No . 2 .
4 . Tur n th e ignitio n switc h O N (II) .
5 . Chec k th e MA P wit h th e sca n
tool.
Is 10 1 kP a (76 0 mmHg , 30. 0 in.Hg )
o r highe r indicated ?
Chec k fo r a n ope n in wir e (SG 1
line):1. Remov e the jumpe r wire.
2 . Measur e voltag e betwee n th e
MA P senso r 3 P connecto r ter -
minal s No . 1 an d No . 2 .
I s ther e abou t 5 V ?
Chec k fo r a n ope n i n th e wir e
(MA P line) :
1. Tur n th e ignitio n switc h OFF .2. Instal l a jumpe r wir e o n th ePC M connector s betwee n D 9and D11.3. Tur n th e ignitio n switc h O N (II) .4. Chec k th e MA P wit h th e sca ntool.
/ Is 10 1 kP a (76 0 mmHg , 30. 0 in.Hg )\ or highe r indicated ?
Substitut e a known-goo d PC M
an d
rechec k (see pag e 11-42 for
immobilize r information) . I f nor -
ma l MA P is indicated , replac e th e
origina l PCM .
Intermitten t failure, system is O Kat thi s time . Chec k fo r poo r con -
nection s o r loos e wire s a t C252 ,
C254 (locate d a t lef t shoc k tower) ,C111 (MA P sensor ) an d PCM .
MAP SENSO R 3 P CONNECTO R (C111)
SG1(GRN/WHT )MAP(RED/GRN )
JUMPER WIR E
Wire sid e o f femal e terminal s
Replac e th e MA P sensor .
VCC1(YEL/RED )
Repair ope n in th e wir e betwee nPCM (D11) an d MA P sensor .
SG1(GRN/WHT )
Wire sid e o f femal e terminal s
Repai r ope n in th e wire s betwee n
PCM (D9 ) an d MA P sensor .
Is 10 1 kP a (76 0 mmHg , 30.0 in.Hg )
o r highe r indicated ?
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The scan tool indicates Diagnostic Trouble Code (DTC) P1128: Manifold Absolute Pressure (MAP) lower than

expected.

— The MIL has been reported on.

— DTC P1128 is stored.

Problem verification:

1. Turn the ignition switch ON (II).

2. Check the MAP with the scan

tool.

Is 54.1 kPa (406 mmHg, 16.0

in.Hg) or higher indicated?
Intermittent failure, system is OK

at this time.

The scan tool indicates Diagnostic Trouble Code (DTC) P1129: Manifold Absolute Pressure (MAP) higher than

expected.

Is 43.3 kPa (325 mmHg, 12.8

in.Hg) or less indicated?
Intermittent failure, system is OK

at this time.

Replace the MAP sensor.
NO
YES
Problem verification:

1. Start the engine. Hold the

engine at 3,000 rpm with no

load (in Park or neutral) until

the radiator fan comes on, then

let it idle.

2. Check the MAP with the scan

tool.
— The MIL has been reported on.

— DTC P1129 is stored.
Replace the MAP sensor.
NO
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PGM-FI Syste m
Intake Ai r Temperatur e (IAT ) Senso r
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0111 : A range/performanc e proble m in th e Intak e Ai r
Temperatur e (IAT ) Senso r circuit .
The IA T Senso r i s a temperatur e dependan t resisto r (thermistor) . Th e resistanc e o f th e thermisto r decrease s a s th e intak e
air temperatur e increase s a s show n below .
— Th e MI L ha s bee n reporte d on .— DT C P011 1 i s stored .
Problem verification :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e IA T senso r 2 Pconnector .3. Remov e th e IA T sensor .
4 . Reconnec t th e IA T senso r 2 P
connector .5. Leav e th e IA T senso r expose dto ambien t temperature .6. Tur n th e ignitio n switc h O N (II) .7. Chec k th e IA T wit h th e sca ntool.
Is ambien t temperatur e indicated ?
YES
Chec k th e IA T senso r output :1. War m th e IA T senso r wit h ahai r dryer .2. Chec k th e IA T wit h th e sca ntool.
Did th e IA T ris e 1.8° F (1.0°C )or mor e fro m th e ambien ttemperature ? RESISTANC
E
THERMISTOR
Replace th e IA T sensor .
Intermitten t failure , syste m is O Kat thi s time .
Replac e th e IA T sensor .
NO
YE S
NO
INTAK E AI R TEMPERATUR E
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The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0112 : A lo w voltag e (hig h temperature ) proble m in th e
Intak e Ai r Temperatur e (IAT ) senso r circuit .
— Th e MI L ha s bee n reporte d on .
— DT C P011 2 is stored .
— O r fro m Probabl e Caus e List .
Proble m verification :
1 . Tur n th e ignitio n switc h O N (II) .
2 . Chec k th e IA T wit h th e sca n
tool.
Is 302° F (150°C ) o r highe r (o r
H-Limi t i n Hond a mod e o f th e
PG M Tester ) o r 0 V indicated ?
YES
Chec k fo r a shor t i n th e IA T sen -sor:1. Disconnec t th e IA T senso r 2 Pconnector .2. Chec k th e IA T wit h th e sca ntool.
Is 302° F (150°C ) o r highe r (o r
H-Limi t i n Hond a mod e o f th e
PG M Tester ) o r 0 V indicated ?
YES
Chec k fo r a shor t i n th e wir e (IA 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 n
No . 2 termina l o n th e IA T sen -
so r 2 P connecto r an d bod y
ground .
I s 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 nor -
ma l IA T is indicated , replac e th e
origina l PCM .
NO
Is th e correc t ambien t temper -
atur e indicated* ? Replac
e th e IA T sensor .
YES
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) ,
C109 (IA T sensor ) an d PCM .
*: I f th e engin e is warm , i t wil l b e highe rthan ambien t temperature .
Replace th e IA T sensor .
IAT SENSO R 2P CONNECTO R (C109 )
Wir e sid e o f femal e terminal s
Repai r shor t i n th e wir e betwee n
PC M (D8 ) an d IA T sensor .
YES
NO
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PGM-FI Syste m
Intake Ai r Temperatur e (IAT ) Senso r (cont'd )
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0113 : A hig h voltag e (lo w temperature ) proble m in th e
Intak e Ai r Temperatur e (IAT ) senso r circuit .
— Th e MI L ha s bee n reporte d on .
— DT C P011 3 is stored .
Proble m verification :
1. Tur n th e ignitio n switc h O N (II) .2. Chec k th e IA 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 PG M Tester ) o r
5 V indicated ?
YES
Chec k fo r a n ope n in th e IA T sen -sor:1. Disconnec t th e IA T senso r 2 P
connector .
2 . Instal l a jumpe r wir e betwee n
the tw o terminal s o n th e IA Tsenso r 2 P connector .
3 . Chec k th e intak e ai r tempera -
ture 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 PG M Tester ) o r
5 V indicated ?
YES
Chec k fo r a n ope n i n th e wire s
(IAT , SG 2 lines) :
1 . Tur n th e ignitio n switc h OFF .
2 . Instal l a jumpe r wir e betwee n
D8 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 IA T wit h th e sca ntool.
ls -4° F (-20°C ) o r les s (o r L -
Limi t i n Hond a 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 IA T i s indicated , replac e th e
origina l PCM . Intermitten
t failure , syste m is O K
thi s time . Chec k fo r poo r connec -
tion s o r loos e wire s a t C251 , C25 4
(locate d a t lef t shoc k tower) ,C109 (IA T sensor ) an d PCM .
Replac e th e IA T sensor .
PCM CONNECTO R D (22P )
Wir e sid e o f femal e terminal s
Repai r ope n in th e wire s betwee n
PCM (D8 , D22 ) an d IA T sensor .
NO
NO
JUMPE R WIR E
NO
IA T SENSO R 2 P CONNECTO R (C109 )
Wir e sid e o f femal e terminal s
JUMPE
R WIR E
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The EC T Senso r i s a temperatur e dependen t resisto r (thermistor) . Th e resistanc e o f th e thermisto r decrease s a s th e engin e
coolan t temperatur e increase s a s show n below .
THERMISTO R
ENGINE COOLAN T TEMPERATUR E
NOTE: I f DT C P011 7 and/o r P011 8 ar e store d a t th e sam e tim e a s DT C P0116 , troubleshoo t thos e DTC s first , the n trou -
bleshoo t DT C P0116 .
Possibl e Caus e
• EC T senso r deterioratio n
• Malfunctio n i n th e thermosta t an d th e coolin g syste m
Troubleshootin g Flowchar t
ls176-200°F (80 - 93°C)
indicated?Intermitten t failure , syste m is O Kat thi s time . Chec k th e thermo -stat an d th e coolin g system .
NO
Chec k th e thermosta t an d thecoolin g system . I f the y ar e OK ,replac e th e EC T sensor .
YES
RESISTANC E
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0116 : A range/performanc e proble m in th e Engin e
Coolan t Temperatur e (ECT ) senso r circuit .
Engine Coolan t Temperatur e (ECT ) Senso r
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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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(From pag e 11-78 )
I s ther e abou t 0. 5
YE S
Chec k fo r a n ope n o r shor t i n th eTP sensor :Measure resistanc e betwee n No . 2
termina l an d No . 3 termina l wit h
th e throttl e full y closed .
I s ther e abou t 4. 5
YE S
Chec k fo r a n ope n in th e PCM :
1 . Reconnec t th e T P senso r con -
nector .2. Tur n th e ignitio n switc h O N (II) .3. Measur e voltag e betwee n D 6
termina l an d D2 2 termina l o n
th e PC M connector .
I s ther e approx . 0. 5 V whe n th e
throttl e is full y close d an d
approx . 4. 5 V whe n th e throttl e
i s full y opened ?
(with TCS/VSA* )NO
TP SENSO R
Replace th e throttl e body .
Replac e th e throttl e body . Termina
l sid e o f mal e terminal s
PC M CONNECTO R D (22P )
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 . Wir
e sid e o f femal e terminal s
Check fo r a shor t i n th e TC S con -trol unit :1. Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e H P (26P) * con -
necto r fro m th e TC S (VSA) *
control unit .3. Tur n th e ignitio n switc h O N (II) .
4 . Measur e voltag e betwee n D 6
termina l an d D2 2 termina l o n
th e PC M connector.
I s ther e abou t 0. 5 V whe n th e
throttl e is full y close d an d
approx . 4. 5 V whe n th e throttl e
i s full y opened ?
Replace th e TC S contro l unrt/VS Aconverte r unit .
NO
*: '0 0 - 0 1 model sRepair shor t i n th e wir e betwee nPCM (D6 ) an d T P sensor .
YES
YE S
NO
N O
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