ACURA RL KA9 1996 Service Repair Manual

PGM-FI System

How to Set Readiness Codes (cont'd)

HO2S Monitor

NOTE:

• Do not turn the ignition switch OFF.

• When the battery negative cable is disconnected, all

readiness codes are cleared.

Required condition ('96 - 97 models):

• Ambient temperature between 32 - 95°F (0 - 35°C).

• Altitude below 2,400 m (7,874 ft.).

Required condition ('98 - 01 models):

Ambient temperature between 20 - 95°F (-7 - 35°C).

1. Connect the scan tool to the Data Link Connector

(DLC).

2. Start the engine, and hold it at 3,000 rpm with no

load (in Park or neutral) until the radiator fan comes

on.

3. Let the engine idle for 5 seconds.

4. Drive at a steady speed between 50 - 62 mph (80 -

100 km/h) for about 2 minutes.

5. With the A/T in D4 position, decelerate from 62 mph

(100 km/h) by completely releasing the throttle for

at least 5 seconds. If the engine is stopped during

this procedure, go to step 4 and do the procedure

again.

6. Check for the readiness code with the scan tool.

HO2S Heater Monitor

NOTE: When the battery negative cable is disconnected,

all readiness codes are cleared.

1. Connect the scan tool to the Data Link Connector

(DLC).

2. Start the engine, and let the engine idle for 10 min-

utes.

3. Check for the readiness code with the scan tool.ProCarManuals.com

MIL Circui t Troubleshootin g
Turn th e ignitio n switc h O N (II )
an d watc h th e Malfunctio n
Indicato r Lam p (MIL) . NOTE
:
I f thi s sympto m is intermittent , chec k fo r th e followin g problems .
• Th e MI L neve r come s o n afte r th e ignitio n switc h is turne d O N (II) .
— A loos e No . 6 EC U (PCM ) (2 0 A ) fus e in th e under-das h fuse/rela y bo x
— A loos e No . 2 2 FUE L PUM P (2 0 A ) fus e in th e under-das h fuse/rela y bo x
— A n intermitten t shor t i n th e wir e betwee n th e PC M (A7 ) an d th e gaug e assembl y
— A n intermitten t shor t i n th e wir e betwee n th e PC M (D10 ) an d th e MA P senso r
— A n intermitten t shor t i n th e wir e betwee n th e PC M (D21 ) an d th e T P sensor , EG R
valv e positio n sensor , fue l tan k pressur e sensor , TC S contro l valv e angl e senso r (wit h
TCS , VSA* )— A loos e No . 2 5 IG COI L (3 0 A ) fus e in th e under-das h fuse/rela y bo x
— PGM-F I mai n rela y
• Th e MI L stay s o n o r come s o n afte r 2 second s wit h th e ignitio n switc h turne d O N (II) .
— A n intermitten t shor t i n th e wir e betwee n th e PC M (C5 ) an d th e servic e chec k con -
nector , dat a lin k connector *
— A n intermitten t ope n in th e wire s betwee n th e PC M (D22 ) an d th e servic e chec k connec -
tor— A n intermitten t shor t i n th e wir e betwee n th e PC M (A7 ) an d th e gaug e assembly .
• Se e th e OBDI I sca n too l o r Hond a PG M Teste r user' s manual s fo r specifi c operatin g
instructions .
Doe s th e MI L com e o n an d
sta y on ?
YE S
(To pag e 11-66 )
Doe s th e lo w oi l pressur e
indicato r ligh t com e on ?
NO
YE S
Repai r shor t o r ope n i n th e
wir e betwee n No . 2 0 EC U
(PCM ) (2 0 A ) fus e an d gaug e
assembly .Replace No . 2 0 EC U (PCM ) (2 0A) fuse .
Check th e engin e starting :
Tr y t o star t th e engine .
Doe s th e engin e start ?
YES
(To pag e 11-68 )
* : '0 0 - 0 1 model s
(T
o pag e 11-64 )
NO
Chec k th e fuse :1. Tur n th e ignitio n switc h OFF .
2 . Tur n th e ignitio n switc h O N (II) . *
: '0 0 - 0 1 model s
ProCarManuals.com

PGM-FI Syste m
MIL Circui t Troubleshootin g (cont'd )
(From pag e 11-63 )
I s th e fus e OK ?
NO
Is th e fus e OK ?
YES
Chec k fo r a n ope n i n th e wire s
(IG P lines) :
1 . Disconnec t th e fue l injecto r
an d IA C valv e connectors .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Measur e voltag e betwee n
bod y groun d an d th e PC M
connecto r terminal s A1 3 an d
B1 individually .
Is ther e batter y voltage ?NO
YE S
— Repai r shor t i n th e wir e
betwee n No . 6 EC U (PCM ) (2 0
A ) fus e an d PGM-F I mai n
relay.— Repai r shor t i n th e wir e
betwee n PGM-F I mai n rela y
an d th e PCM , fue l injectors ,
o r IA C valve .
— Repai r shor t i n th e wir e
betwee n fue l injector s an d
IA C valve .
— Replac e No . 6 EC U (PCM ) (2 0
A) fuse .
— Repai r shor t i n th e wir e
betwee n No . 2 5 IG COI L (3 0 A )
fus e an d PGM-F I mai n relay .
— Replac e No . 2 5 IG COI L (3 0 A )
fuse .PCM CONNECTOR SA (26P)
— Repai r ope n i n th e wire(s )
betwee n th e PC M (A13 , B9 )
an d PGM-F I mai n relay .
— Chec k fo r a poo r connectio n
o r loos e wire s a t th e PGM-F I
mai n relay .
— Tes t th e PGM-F I mai n rela y
(se e pag e 11-146 ).
— Repai r shor t o r ope n i n th e
wir e betwee n th e immobilize r
uni t an d PCM . Wir
e sid e o f femal e terminal s
(T o pag e 11-65 )
NO
YE S
ProCarManuals.com

(From pag e 11-64 )
Chec k fo r a n ope n i n th e wire s
(PG , L G lines) :
1 . Reconnec t th e fue l injecto r
an d IA C valv e connectors .
2 . Measur e voltag e betwee n
body groun d an d th e PC Mconnecto r terminal s A12 , A25 ,A26, an d B 9 individually .
Is ther e les s tha n 1.0V ?
YES
Chec k fo r a shor t i n th e wire s
(VCC1 , VCC 2 lines) :
Measur e voltag e betwee n bod y
groun d an d th e PC M connecto r
terminals D1 0 an d D2 1 individu -ally.
Is ther e approx . 5 V ?NO
YE S
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
symptom/indicatio n goe s away ,
replac e th e origina l PCM .
: '0 0 - 0 1 model s PC
M CONNECTO R A (26P )
Repai r ope n i n th e wire(s )
between th e PC M an d G10 1 tha thad mor e tha n 1. 0 V .
Chec k fo r a shor t i n a sensor :
Whil e measurin g voltag e betwee n
body groun d an d th e PC M con -necto r terminal s D1 0 an d D2 1individually , disconnec t th e 3 Pconnecto r o f eac h senso r on e a ta time .— MA P senso r
— T P senso r
— EG R valv e lif t senso r— Fue l tan k pressur e senso r
— TCS/VSA * contro l valv e angl e
senso r (wit h TCS/VSA* )
I s ther e approx . 5 V ?
NO
Chec k fo r a shor t i n th e wire s
(VCC1 , VCC 2 lines) :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e EC M connec -tor D (22P) .3. Chec k fo r continuit y betwee nbody groun d an d EC M con -necto r terminal s D1 0 an d D2 1individually .
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
symptom/indicatio n goe s away ,replace th e origina l PCM .
YES
Wir e sid e o f femal e terminal s
PC M CONNECTO R D (22P )
Wir e sid e o f femal e terminal s
Replac e th e senso r tha t ha d
approx . 5 V .
Repai r shor t i n th e wir e betwee n
th e MA P sensor , T P sensor , EG R
valv e positio n sensor . Fue l tan k
pressur e senso r o r TCS/VSA *
contro l valv e angl e senso r (wit h
TCS/VSA* ) an d PCM .
YES
NO
ProCarManuals.com

PGM-FI Syste m
MIL Circui t Troubleshootin g (cont'd )
(From pag e 11-63 )
Chec k th e Diagnosti c Troubl e
Cod e (DTC) :
1 . Tur n th e ignitio n switc h OFF .
2 . Hond a PG M Tester .
3 . Tur n th e ignitio n switc h O N (II) .
4 . Rea d th e DT C wit h th e Hond a
PG M Tester .
Ar e an y DTC(s ) indicated ?
NO
Chec k fo r a shor t i n th e wir e
(SC S line) :
1 . Tur n th e ignitio n switc h OFF .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Measur e voltag e betwee n
PCM connecto r termina l C 5an d bod y ground .
I s ther e approx . 5 V (o r batter y
voltage) ?
YES
Go t o th e DT C Troubleshootin g
Inde x (se e pag e 11-53 ).
PCM CONNECTO R C (12P )
Wir e sid e o f femal e terminal s
Repai r shor t i n th e wir e betwee n
th e servic e chec k connector , dat a
lin k connector * an d PC M (C5) .
DATA LIN K CONNECTO R (DLC ) (16P )
Wir e sid e o f femal e terminal s
Is ther e continuity ?Repair shor t i n th e wir e betwee nthe DL C an d PC M (D4) .
*: '0 0 - 0 1 model s
(To pag e 11-67 )
NO
YE S
NO
Chec k fo r a shor t i n th e wir e(K-line) :1. Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e PC M connecto r
D (22P) .3. Chec k fo r continuit y betwee n
th e Dat a lin k connecto r (DLC )
16 P connecto r termina l No . 1 5
an d bod y ground .
YES
ProCarManuals.com

(From pag e 11-66 )
Chec k fo r a n ope n i n th e wir e
(K-line) :Check fo r continuit y betwee n th e
DL C 16 P connecto r termina l No .
1 5 an d PC M connecto r termina l
D4.
DAT A LIN K CONNECTO R (DLC ) (16P )
Wir e sid e o f femal e terminal s
PC M CONNECTO R D (22P )
Wir e sid e o f femal e terminal s
I s ther e continuity ? Repai
r ope n i n th e wir e betwee n
the DL C an d PC M (D4) .
YES
Chec k fo r a shor t i n th e wir e (MI Lline) :Turn th e ignitio n switc h O N (II) .
Doe s th e MI L com e on ?
NO
Repai r shor t i n th e wir e betwee n
th e gaug e assembl y an d PC M
(A7) .
Substitut e a known-goo d PC M
an d rechec k (se e pag e 11-4 1 fo r
immobilize r information) . I f
symptom/indicatio n goe s away ,
replac e th e origina l PCM .
YES
NO
ProCarManuals.com

PGM-FI Syste m
MIL Circui t Troubleshootin g (cont'd )
Check fo r a n ope n in th e wir e o r
bul b (MI L line) :
1. Tur n th e ignitio n switc h OFF .2. Connec t PC M connecto r ter -mina l A 7 an d bod y groun dwith a jumpe r wire .3. Tur n th e ignitio n switc h O N (II) .
PCM CONNECTO R A (26P )
Wir e sid e o f femal e terminal s
Doe s th e MI L com e on ?
YES
— Repai r ope n i n th e wire sbetwee n th e PC M (A7 ) an dgaug e assembly .
— Replac e th e MI L bulb .
Substitut e a known-goo d PC M
an d rechec k (se e pag e 11-42 fo r
immobilize r information) . I fsymptom/indicatio n goe s away ,
replac e th e origina l PCM .
NO
MI L (L T GRN/RED )JUMPE
R WIR E
(Fro
m pag e 11-63 )
ProCarManuals.com

Manifold Absolut e Pressur e (MAP ) Senso r
The sca n tool indicate s Diagnosti c Trouble Code (DTC ) P0106 : A range/performanc e problem (vacuu m leak) in
th e Manifol d Absolut e Pressur e (MAP ) Senso r system .
The MA P senso r convert s manifol d absolut e pressur e int o electrica l signal s an d input s th e PCM .
SENSO RUNIT
— Th e MI L ha s bee n reporte d on .
— DT C P010 6 is stored .
— O r fro m Probabl e Caus e List .
Proble m verification :
1. D o th e PC M Rese t Procedure .2. Star t th e engin e an d kee p
engin e spee d a t 1,00 0 rp m fo r
1 minut e wit h th e transmis -sion in Par k o r neutral .
I s DT C P010 6 indicated ?
NO
Chec k th e MA P senso r output :
1 . Sto p th e engine .
2. Tur n th e ignitio n switc h O N (II) .3. Chec k th e manifol d absolut e
pressur e wit h th e sca n tool .
Doe s i t indicat e atmospheri c
pressure?
YES
(To pag e 11-70 ) OUTPU
T
VOLTAG E
YES
Chec k fo r vacuu m leakag e
betwee n th e MA P senso r an d
throttl e body .
Is ther e leakage ?NO
Replac e th e MA P sensor .
Check th e MA P senso r output :
1 . Sto p th e engine .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Chec k th e MA P wit h th e sca n
tool.
Replac e th e MA P sensor .Does it indicat e atmospheri cpressure?
YES
(To pag e 11-70 )
YES
NO
ProCarManuals.com

PGM-FI Syste m
Manifol d Absolut e Pressur e (MAP ) Senso r (cont'd )
(From pag e 11-69 ) (Fro
m pag e 11-69 )
Chec k fo r poo r response :
1 . Star t th e engine . Hol d th e
engin e a t 3,00 0 rp m wit h trans -
missio n i n Par k o r neutra l unti l
th e radiato r fa n come s on , the n
sto p th e engine .
2 . Star t th e engine .
3 . Chec k th e MA P wit h th e sca n
tool.
Is a MA P o f 40. 0 kP a (30 0 mmHg ,
12. 0 in.Hg ) o r les s indicate d withi n
1 secon d afte r startin g th e engine ? Replac
e th e MA P sensor .
Replac e th e MA P sensor . Chec
k fo r poo r response :
1 . Star t th e engine . Hol d th e
engin e a t 3,00 0 rp m wit h trans -
missio n i n Par k o r neutra l unti l
th e radiato r fa n come s on , the n
sto p th e engine .
2 . Star t th e engine .
3 . Chec k th e MA P wit h th e sca n
tool.
Is a MA P of 40. 0 kP a (30 0 mmHg ,12.0 in.Hg ) o r les s indicate d withi n
1 secon d afte r startin g th e engine ?
YES
Substitut e a known-goo d PC Mand rechec k (se e pag e 11-42 fo r
immobilize r information) . I f
symptom/indicatio n goe s away ,
replac e th e origina l PCM .
Th
e MA P senso r i s O K a t thi s time .
YES
NO
ProCarManuals.com

The sca n too l indicates Diagnosti c Troubl e Cod e (DTC ) P0107 : A lo w voltag e (hig h 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 7 is stored .
Proble m verification :
1 . Tur n th e ignitio n switc h O N (II) .
2 . Chec k th e MA P wit h th e sca n
tool .
I s approx . 0 kP a ( 0 mmHg , 0 in.Hg )
indicated ?
YES
Chec k fo r a n ope n o r shor t i n th e
MA P sensor :
1 . Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e MA P senso r
connector .
3 . Tur n th e ignitio n switc h O N (II) .
4 . Chec k th e MA P wit h th e sca n
tool.
Is approx . 0 kP a ( 0 mmHg , 0 in.Hg )indicated ?
YES
Chec k fo r a n ope n in wir e (VCC 1line):Measur e voltag e betwee n th e
MA P senso r connecto r No . 1 ter -
mina l an d No . 2 terminal .
I s ther e abou t 5 V ?
YE S
Chec k fo r a shor t i n th e wir e
(MA P 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
MA P senso r connecto r No . 3 ter -
mina l 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 MA P 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 C252 ,
C25 4 (locate d a t lef t shoc k tower) ,
C111 (MA P sensor ) an d PCM .
Replac e th e MA P sensor .MAP SENSO R 3 P CONNECTO R (C111 )
Repair ope n i n th e wir e betwee nPCM (D10 ) an d MA P sensor .Wire sid e o f femal e terminal s
Repai r shor t i n th e wir e betwee n
PCM (D9 ) an d MA P sensor .
NO
N
O
N
O
ProCarManuals.com