1996 ACURA RL KA9 sensor

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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PGM-FI Syste m
Throttle Positio n (TP ) Senso r (cont'd )
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0123 : A hig h voltag e proble m in th e Throttl e Positio n
(TP) senso r circuit .
Is ther e abou t 0. 5 V whe n
th e throttl e i s full y close d
an d approx . 4. 5 V whe n th e
throttl e is full y opened ?
NO
Chec k fo r a n ope n in th e T P sen -sor: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 . 3 termina l an d No . 1 ter -
mina l o n th e harnes s sid e o f
the T P senso r connector .
Is ther e abou t 5 V ?
NO
Chec k fo r a n ope n i n th e wir e
(SG 2 line) :
Measur e voltag e betwee n PC M
connecto r terminal s D2 1 an d D22 .
I s ther e abou t 5 V ?
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 i s no w available ,
replac e th e origina l PCM . T
P SENSO R CONNECTO R (C113 )
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 ,
C253 , C25 4 (locate d a t lef t shoc k
tower ) C11 3 (T P sensor ) an d PCM .
Wire sid e o f femal e terminal s
Replac e th e throttl e body . PC
M CONNECTO R D (22P )
Wir e sid e o f femal e terminal s
Repai r ope n in th e wir e betwee n
PCM (D22 ) an d T P sensor .
YES
YE S
YE
S
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. Tur n th e ignitio n switc h O N (II) .
3 . Chec k th e throttl e positio n
wit h th e sca n tool .
—
Th e MI L ha s bee n reporte d on .
— DT C P012 3 is stored .
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The scan tool indicates Diagnostic Trouble Code (DTC) P1121: Throttle Position (TP) lower than expected.

— The MIL has been reported on.

— DTC P1121 is stored.

Problem verification:

1. Turn the ignition switch ON (II).

2. Check the throttle position

with the scan tool.

I
s 14.4% or higher indicated when

the throttle is fully opened?
Intermittent failure, system is OK

at this time.

The scan tool indicates Diagnostic Trouble Code (DTC) P1122: Throttle Position (TP) higher than expected.

— The MIL has been reported on.

— DTC P1122 is stored.

Problem verification:

1. Turn the ignition switch ON (II).

2. Check the throttle position

with the scan tool.

Is 19.1% or less indicated when

the throttle is fully closed?
Intermittent failure, system is OK

at this time.

Replace the TP sensor.
NO
YES
Replace the TP sensor.
NO
YESProCarManuals.com

PGM-FI Syste m
Primar y Heate d Oxyge n Senso r (HO2S ) (Senso r 1 )
Th e Heate d Oxyge n Sensor s (HO2S ) detec t th e oxyge n conten t i n th e exhaus t ga s an d signa l th e PCM . I n operation , th e
PC M receive s th e signal s fro m th e senso r an d varie s th e duratio n durin g whic h fue l i s injected . T o stabiliz e th e sensor' s
output, th e senso r ha s a n interna l heater . Th e Righ t Primar y HO2 S (Ban k 1 , Senso r 1 ) i s installe d in th e righ t exhaus t man -
ifold, an d th e Lef t Primar y HO2 S (Ban k 2 , Senso r 1 ) i s installe d in th e lef t exhaus t manifold .
ZIRCONIAELEMENT
SENSORTERMINA L
®e
VOLTAG E (V )
HEATE R
STOICHIOMETRI CAIR-FUEL RATI O
HEATE RTERMINA LRICHAIR -FUE LRATI O
LEAN
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0131 : A lo w voltag e proble m in th e Righ t Primar y
Heated Oxyge n Senso r (HO2S ) (Ban k 1 , Senso r 1 ) circuit .
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0151 : A lo w voltag e proble m in th e Lef t Primar y
Heated Oxyge n Senso r (HO2S ) (Ban k 2 , Senso r 1 ) circuit .
— Th e MI L ha s bee n reporte d on .
— DT C P013 1 and/o r P015 1 ar e
stored .
Doe s th e voltag e sta y a t 0. 5 V
o r less ?
Is i t normal ?
(T o pag e 11-85 )
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 )
C11 9 (righ t primar y HO2 S (Ban k
1 , Senso r 1) ) o r C12 6 (lef t prima -
r y HO2 S (Ban k 2 , Senso r 1)) * an d
PCM .
Repai r fue l suppl y system .
*: P015 1
NO
YE S
Chec k th e fue l pressure .
YES
Proble m verification :
1 . D o th e PC M Rese t Procedure .
2 . Star t th e engine . Hol d th e
engin e a t 3,00 0 rp m wit h n oloa d (in Par k or neutral ) untilthe radiato r fa n come s on .
3 . Test-driv e wit h th e transmis -
sion in position .
4 . Chec k th e righ t primar y HO2 S
(Ban k 1 , Senso r 1 ) o r lef t pri -
mar y HO2S * (Ban k 2 , Senso r
1 ) outpu t voltag e wit h th e sca n
too l durin g acceleratio n usin g
wid e ope n throttle .
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PGM-FI Syste m
Primar y Heate d Oxyge n Senso r (HO2S ) (Senso r 1 ) (cont'd )
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0132 : A hig h voltag e proble m in th e Righ t Primar y
Heated Oxyge n Senso r (Righ t Primar y HO2S ) (Ban k 1 , Senso r 1 ) circuit .
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0152 : A hig h voltag e proble m in th e Lef t Primar yHeated Oxyge n Senso r (Lef t Primar y HO2S ) (Ban k 2 , Senso r 1 ) circuit .
— Th e MI L ha s bee n reporte d on .
— DT C P013 2 and/o r P015 2 ar e
stored .
Proble m verification :
1 . D o th e PC M Rese t Procedure .
2 .
Start the engine. Hold the enginea t 3,00 0 rp m wit h n o loa d (i nPar k o r neutral ) unti l th e radia -
torfancomeson .
3. Test-driv e wit h th e transmis -sion in position .4. Chec k th e righ t primar y HO2 S
(Ban k 1 , Senso r 1 ) o r lef t primar y
HO2S * (Ban k 2 , Senso r 1 ) out -
pu t voltag e wit h th e sca n too l
durin g deceleratio n usin g com -
pletel y close d throttle .
Doe s th e voltag e sta y a t 0. 9 V
o r more ?
YES
Chec k fo r a n ope n in th e HO2S :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e righ t primar yHO2S (Ban k 1 , Senso r 1 ) o r lef t
primar y HO2S * (Ban k 2 , Sen -
so r 1 (connector .
3. Instal l a jumpe r wir e o n th eharnes s sid e o f th e righ t primar y
HO2 S (Ban k 1 , Senso r 1 ) o r lef t
primar y HO2S * connecto r
betwee n terminal s No . 1 an d
No. 2 .4. Tur n th e ignitio n switc h O N (II) .
5 . Chec k th e righ t primar y HO2 S
(Ban k 1 , Senso r 1 ) o r lef t pri -
mar y HO2S *
(Bank 2, Sensor 1)outpu t voltag e wit h th e sca n tool .
I s ther e 0. 9 V or more ?
YES
Chec k fo r a n ope n i n th e wire s
(PO2 S line) :
1. Tur n th e ignitio n switc h OFF .2. Instal l a jumpe r wir e o n th ePC M connecto r betwee n D19 ,or D18 * and D22 .3. Tur n th e ignitio n switc h O N (II) .4. Chec k th e righ t primar y HO2 S
(Ban k 1 , Senso r 1 ) o r lef t pri -
mar y HO2S * (Ban k 2 , Senso r 1 )
outpu t voltag e wit h th e sca n tool .
I s ther e 0. 9 V or more ?
YES
Substitut e a known-goo d PC M an d
rechec k (se e pag e 11-42 fo r immo -
bilize r information) . I f symp -
tom/indicatio n goe s away , replac e
th e origina l PCM .
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) ,
C11 9 (righ t primar y HO2 S (Ban k 1 ,
Senso r 1) ) o r C12 6 (lef t primar y
HO2 S (Ban k 2 , Senso r 1)) *
RIGH T PRIMAR Y HO2 S (Ban k 1 , Senso r 1 ) CONNECTO R (C119 )
o r LEF T PRIMAR Y HO2 S (Ban k 2 , Senso r 1 ) CONNECTO R (C126 )
JUMPE R WIR E
Replac e th e HO2S . Wir
e sid e o f femal e terminal s
PC M CONNECTO R D (22P )
Repai r ope n i n th e wir e betwee n
PCM (D1 9 o r D18* ) an d righ t pri -mar y HO2 S (Ban k 1 , Senso r 1 ) o r
lef t primar y HO2S * (Ban k 2 ,
Senso r 1) . Wir
e sid e o f femal e terminal s
* : P015 2NO
N
O
JUMPE RWIRE
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PGM-FI System

Secondary Heated Oxygen Sensor (HO2S) (Sensor 2) (cont'd)

Does the voltage stay within

0.3 - 0.6 V for 2 minutes?
NO
Intermittent failure, system is OK

at this time. Check for poor con-

nections or loose wires at C444

(located behind right kick panel),

C610 (secondary HO2S (Sensor

2)) and
PCM.
The scan tool indicates Diagnostic Trouble Code (DTC) P0139: A slow response problem in the Secondary

Heated Oxygen Sensor (Secondary HO2S) (Sensor 2) circuit.

— The MIL has been reported on.

— DTC P0139 is stored.

Problem verification:

1. Do the PCM Reset Procedure.

2. Start the engine. Hold the

engine at 3,000 rpm with no

load (in Park or neutral) until

the radiator fan comes on.

3. Check the secondary HO2S

(Sensor 2) or output at 3,000

rpm with the scan tool.

Replace the secondary HO2S (Sen-

sor 2).
YESProCarManuals.com