ACURA RL KA9 1996 Service Repair Manual

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
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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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(From pag e 11-84 )
Chec k fo r a shor t i n 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 ,
Senso r 1 ) connector .
3 . Star t th e engin e an d le t i t idle .
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 esca n tool .
Doe s it sta y a t 0. 5 V or less ?
YES
Chec k fo r a shor t i n th e wires :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 . 1 termina l o n th e harnes s
sid e o f th e HO2 S connecto r
and bod y ground .
Replace th e HO2S .
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 symp -
tom/indicatio n goe s away , replac e
th e origina l PCM . Repai
r shor t 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) . 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 1 , Senso r 1 ) CONNECTO R (C126 )
Wir e sid e o f femal e terminal s
*: P015 1
YES
NO
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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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The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0133 : A slo w respons e proble m in th e Righ t Primar y
Heate d Oxyge n Senso r (Righ t Primar y HO2S ) (Ban k 1 , Senso r 1 ) circuit .
Th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0153 : A slo w respons e proble m in th e Lef t Primar y
Heate d Oxyge n Senso r (Lef t Primar y HO2S ) (Ban k 2 , Senso r 1 ) circuit .
Descriptio n
B y controllin g th e air/fue l rati o wit h a Primar y HO2 S (Senso r 1 ) an d a Secondar y HO2 S (Senso r 2) , th e deterioratio n o f th e
Primar y HO2 S (Senso r 1 ) ca n b e evaluate d b y it s feedbac k period . Whe n th e feedbac k perio d o f th e HO2 S exceed s a certai n
valu e durin g stabl e drivin g conditions , th e senso r wil l b e judge d a s deteriorated . Whe n deterioratio n ha s bee n detecte d dur -
in g tw o consecutiv e trips , th e MI L come s o n an d DT C P013 3 o r P015 3 wil l b e stored .
NOTE : I f DT C P0131 , P013 2 and/o r P013 5 ar e store d a t th e sam e tim e a s DT C P0133 , troubleshoo t thos e DTC s first , the n
troubleshoo t DT C P0133 . I f DT C P0151 , P015 2 and/o r P015 5 ar e store d a t th e sam e tim e a s DT C P0153 , troubleshoo t thos e
DTC s first , the n troubleshoo t DT C P0153 .
Is DT C P013 3 and/o r P015 3
indicated ?
YES
Replace the primary HO2S (Sen-
sor 1).
NO
Intermitten t failure , syste m is O Kat 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)) * an d
PCM .
*: P015 3
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 (i n Par k o r neutral ) unti l
th e radiato r fa n come s on .
3 . Connec t th e SC S servic e con -
nector .
4 . Test-driv e unde r followin g
conditions .— 5 5 mp h (8 8 km/h ) stead y
spee d
— Transmissio n i n posi -tion— Unti l readines s cod e come son
Possibl e Caus e
• Primar y HO2 S (Senso r 1 ) Deterioratio n
• Primar y HO2 S Heate r (Senso r 1 ) Deterioratio n
• Exhaus t syste m leakag e
Troubleshootin g Flowchar t
— Th e MI L ha s bee n reporte d on .
— DT C P013 3 and/o r P015 3
stored.
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PGM-FI Syste m
Secondar y Heate d Oxyge n Senso r (HO2S ) (Senso r 2 )
Th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0137 : A lo w voltag e proble m in th e Secondar y Heate d
Oxygen Senso r (Secondar y HO2S ) (Senso r 2 ) circuit .
— Th e MI L ha s bee n reporte d on .
— DT C P013 7 is stored .
Proble m verification :
1 . D o th e PC M Rese t Procedure .
2. 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 l
th e radiato r fa n come s on .
3 . Chec k th e secondar y HO2 S
(Senso r 2 ) outpu t voltag e wit hthe sca n too l a t 3,00 0 rpm .
Doe s th e voltag e sta y a t 0. 3 V
o r less ?
YES
Chec k fo r a shor t i n th e HO2S :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e secondar y
HO2 S (Senso r 2 ) connector .
3 . Star t th e engine .
4 . Chec k th e secondar y HO2 S
(Senso r 2 ) outpu t wit h th e sca n
tool.
Doe s th e voltag e sta y a t 0. 3 Vor less ?
YES
Chec k fo r a shor t i n th e wir e(SO2 S line) :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e PC M connec -tor F (8P) .3. Chec k fo r continuit y betwee nNo. 1 termina l o n th e second -ary HO2 S (Senso r 2 ) connec -tor an d 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 -
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 C44 4
(locate d behin d righ t kic k panel) ,
C61 0 (secondar y HO2 S (Senso r
2)) an d PCM .
Replac e th e HO2 S (Senso r 2) .
SECONDAR YHO2S (Senso r 2 ) CONNECTO R (C610 )
SHO2S(WHT /RED)
Repai r shor t i n th e wir e betwee n
PC M (F2 ) an d secondar y HO2 S
(Senso r 2) . Wir
e sid e o f femal e terminal sYES
NO
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The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0138 : A hig h voltag e proble m in th e Secondar y Heate d
Oxygen Senso r (HO2S ) (Senso r 2 ) circuit .
— Th e MI L ha s bee n reporte d on .
— DT C P013 8 is stored .
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 (i n Par k o r neutral ) unti l
th e radiato r fa n come s on .
3 . Chec k th e secondar y HO2 S
(Senso r 2 ) outpu t a t 3,00 0 rp m
voltag e wit h th e sca n tool .
Doe s th e voltag e sta y a t 0. 6 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 secondar y
HO2 S (Senso r 2 ) connector .
3 . Instal l a jumpe r wire betwee n
th e secondar y HO2 S (Senso r 2 )
connecto r (harnes s side ) No . 1
termina l an d No . 2 terminal .
4. Tur n th e ignitio n switc h O N (II) .5. Chec k th e secondar y HO2 S
(Senso r 2 ) outpu t voltag e wit h
th e sca n tool .
I s ther e 0. 6 V or more ?
YES
Chec k fo r a n ope n i n th e wir e
(SO2 S line) :
1 . Tur n th e ignitio n switc h OFF .
2 . Instal l a jumpe r wir e betwee n
the PC M connecto r terminal sF2 an d F6 .3. Tur n th e ignitio n switc h O N (II) .
4 . Chec k th e secondar y HO2 S
(Senso r 2 ) outpu t voltag e wit h
the sca n tool .
Is ther e 0. 6 V or more ?
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 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 C44 4
(locate d behin d righ t kic k panel) ,
C61 0 (secondar y HO2 S (Senso r
2)) an d PCM .
SECONDAR Y HO2 S (Senso r 2 ) CONNECTO R (C610 )
SHO2 S
(WHT /RED)
SO2S GN D(GRN/WHT )
Wire sid e o f femal e terminal s
Replac e th e secondar y HO2 S (Sen -
sor 2) .
JUMPE RWIRE
SO2S GN D(GRN/WHT )
Repair ope n i n th e wir e betwee nPCM (F2 ) o r (F6 ) an d secondar yHO2S (Senso r 2) . Wir
e sid e o f femal e terminal s
NO
PC M CONNECTO R F (8P )
SO2 S(WHT/RED )
JUMPER WIR E
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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

Heated Oxyge n Senso r (HO2S ) Heate r
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0135 : A proble m in th e Righ t Primar y Heate d Oxyge n
Sensor (Righ t Primar y HO2S ) (Ban k 1 , Senso r 1 ) Heate r circuit .
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0141 : A proble m in th e Secondar y Heate d Oxyge n
Sensor (Secondar y HO2S ) (Senso r 2 ) Heate r circuit .
The sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0155 : A proble m in th e Lef t Primar y Heate d Oxyge n
Sensor (Lef t Primar y HO2S ) (Ban k 2 , Senso r 1 ) Heate r circuit .
— Th e MI L ha s bee n reporte d on .
— DT C P0135 , P014 1 and/o r
P015 5 ar e stored .
Proble m verification :
1 . D o th e PC M Rese t Procedure .
2 . Star t th e engine .
I s DT C P0135 , P014 1 o r P015 5
indicated ?
YES
Chec k fo r a n ope n o r shor t i n th eHO2S :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e righ t primar y
HO2 S (Ban k 1 , Senso r 1) , sec -
ondar y HO2 S (Senso r 2)*
1 o rleft primar y HO2 S (Ban k 2 ,Senso r 1 )*2 connector .
3 . Measur e resistanc e betwee n
th e 4 P connecto r No . 3 an d
No . 4 terminal s o n th e HO2 S
side .
Is there 10 - 40 ?
YE S
Chec k fo r continuit y t o bod y
groun d o n HO2 S terminal s No . 3
termina l an d No . 4 individually .
Is ther e continuity ?
NO
Chec k fo r a n ope n o r shor t i n th e
wire s H G 1, O2SHT C lines) :
1. Tur n th e ignitio n switc h O N (II) .2. Measur e voltag e betwee n No .
3 termina l an d No . 4 termina l
o n th e harnes s sid e o f th e 4 P
connector . RIGH
T PRIMAR Y HO2 S (Ban k 1 , Senso r 1 ) CONNECTOR ,
LEF T PRIMAR Y HO2 S (Ban k 2 , Senso r 1 ) CONNECTOR *
SECONDAR Y HO2 S (Senso r 2 ) CONNECTOR*
1
N O
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 3 (locate d a t lef t shoc k tower) ,
C442 , C44 4 (locate d behin d righ t
kic k panel)*
1, C11 9 (righ t primar y
HO2 S (Ban k 1 , Senso r 1)) , C61 0
(secondar y HO2 S (Senso r 2))*
1 o r
C12 6 (lef t primar y HO2 S (Ban k 2 ,
Senso r 1)*
2 an d PCM . Termina
l sid e o f mal e terminal s
Replac e th e HO2S .
Replac e th e HO2S .
RIGHT PRIMAR Y HO2 S (Ban k 1 , Senso r 1 ) CONNECTO R (C119) ,
LEF T PRIMAR Y HO2 S (Ban k 2 , Senso r 1 ) CONNECTO R (C126)*
2
SECONDAR Y HO2 S (Senso r 2 ) CONNECTO R (C610)*1
Is ther e batter y voltage ?YES
NO
(T o pag e 11-92 ) (T
o pag e 11-92 ) Wir
e sid e o f femal e terminal s*1: P014 1*2: P015 5
YES
NO
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