1996 ACURA RL KA9 engine

PGM-FI Syste m
System Descriptio n (cont'd )
3. Fue l Cut-of f Contro l
• Durin g deceleratio n wit h th e throttl e valv e closed , curren t t o th e injector s i s cu t of f t o improv e fue l econom y a t
speed s ove r 1,00 0 rpm .
• Fue l cut-of f actio n als o take s plac e whe n engin e spee d exceed s 5,90 0 rpm , regardles s o f th e positio n o f th e throttl e
valve, t o protec t th e engin e fro m over-revving .
4. A/ C Compresso r Clutc h Rela y
Whe n th e PC M receive s a deman d fo r coolin g fro m th e ai r conditionin g system , i t delay s th e compresso r fro m bein g
energized , an d enriche s th e mixtur e to assur e a smoot h transitio n t o th e A/ C mode .
5 . Evaporativ e Emissio n (EVAP ) Control .
Whe n th e engin e coolan t temperatur e i s abov e 99° F (37°C) : '9 6 - 9 9 models , 140° F (60°C) : '0 0 - 0 4 models , th e PC M
control s th e EVA P caniste r purg e valv e whic h control s vacuu m to th e EVA P canister .
6 . Intak e Manifol d Runne r Contro l (IMRC )
Whe n engin e spee d i s belo w 3,20 0 rpm , th e IMR C Solenoi d Valv e 1 an d IMR C Solenoi d Valv e 2 ar e activate d b y a sig -
na l fro m th e PCM . Intak e ai r flow s throug h a lon g chambe r path , increasin g torqu e a t lo w RPM .
Whe n engin e spee d is 3,20 0 - 3,80 0 rpm , th e IMR C Solenoi d Valv e is deactivate d b y th e PCM . Intak e ai r flow s throug h a
shor t chambe r path , increasin g mid-rang e torque .
Whe n th e engin e rp m is abov e 3,80 0 rpm , th e IMR C Solenoi d Valv e 1 an d IMR C Solenoi d Valv e 2 ar e deactivate d b y th e
PCM . Thi s create s a ver y shor t intak e pat h an d increase s high-spee d torque .
7 . Exhaus t Ga s Recirculatio n (EGR ) Contro l
Whe n th e EG R is require d fo r contro l o f oxide s o f nitroge n (NOx ) emissions , th e PC M control s th e EG R contro l valv e
vacuu m solenoi d valv e whic h supplie s regulate d vacuu m to th e EG R valve .
EC M Fail-safe/Back-u p Function s
1. Fail-saf e Functio n
When a n abnormalit y occur s i n a signa l fro m a sensor , th e PC M ignore s tha t signa l an d assume s a pre-programme d
valu e fo r tha t senso r tha t allow s th e engine to continu e t o run .
2 . Back-u p Functio n
Whe n a n abnormalit y occur s i n th e PC M itself , th e fue l injector s ar e controlle d b y a back-u p circui t independen t o f th e
syste m in orde r t o permi t minima l driving .
3 . Self-diagnosi s Functio n [Malfunctio n Indicato r Lam p (MIL) ]
Whe n a n abnormalit y occur s i n a signa l fro m a sensor , th e PC M supplie s groun d fo r th e MI L an d store s th e DT C in
erasabl e memory . Whe n th e ignitio n i s initiall y turne d on , th e PC M supplie s groun d fo r th e MI L fo r 2 second s t o chec k
the MI L bul b condition .
4. Tw o Tri p Detectio n Metho d ('9 6 - 9 7 models )
T o preven t fals e indications , th e Tw o Tri p Detectio n Metho d i s use d fo r th e HO2S , fue l metering-related , idl e contro l
system , EC T sensor , EG R syste m self-diagnosti c function s an d EVA P contro l system . Whe n a n abnormalit y occurs , th e
PC M store s i t i n it s memory . Whe n th e sam e abnormalit y recur s afte r th e ignitio n switc h i s turne d OF F an d O N (II )
again , th e PC M inform s th e drive r b y lightin g th e MIL .
However , t o eas e troubleshooting , thi s functio n i s cancelle d whe n yo u shor t th e servic e chec k connector . Th e MI L wil l
the n blin k immediatel y whe n a n abnormalit y occurs .
5 . Tw o Drivin g Cycl e Detectio n Metho d ('9 6 - 9 7 models )
A "Drivin g Cycle " consist s o f startin g th e engine , beginnin g close d loo p operation , an d stoppin g th e engine . I f misfir -
in g tha t increase s emissions , EVA P contro l syste m malfunctio n o r TW C deterioratio n i s detecte d durin g tw o consecu -
tiv e drivin g cycles , th e PC M turn s th e MI L on .
However , t o eas e troubleshooting , thi s functio n i s cancelle d whe n yo u shor t th e servic e chec k connector . Th e MI L wil l
the n blin k immediatel y whe n a n abnormalit y occurs .
6 . Tw o Drivin g Cycl e Detectio n Metho d ('9 8 - 0 4 models )
T o preven t fals e indications , th e "tw o drivin g cycl e detectio n method " i s use d fo r th e HO2S , fue l metering-related , idl e
contro l system , EC T sensor , EG R system , TW C an d EVA P contro l syste m an d othe r self-diagnosti c functions . Whe n a n
abnormalit y occurs , th e PC M store s it i n it s memory . Whe n th e sam e abnormalit y recur s afte r switc h is turne d OF F an d
O N (II ) again , th e PC M inform s th e drive r b y turnin g o n th e MIL .
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How to Set Readiness Codes

Catalytic Converter

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. Hold it at 3,000 rpm with no load

(in Park or neutral) until the radiator fan comes on.

3. Drive for about 10 minutes without stopping on a

highway or freeway. Your speed can vary.

4. '96 - 97 models:

With the transmission in D4 position, drive at a

steady speed between 33 - 37 mph (53 - 59 km/h)

for 30 seconds.

'98 - 01 models:

With the A/T in D4 position, drive at a steady speed

between 50 - 62 mph (80 - 100 km/h) for 30 sec-

onds.

5. Do step 4 three times. Between each repetition,

close the throttle completely for 1 - 2 seconds. If the

engine is stopped during this part of the procedure,

go to step 3 and do the procedure again.

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

EGR 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):

Altitude below 2,400 m (7,874 ft.).

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. Drive at a steady speed with the transmission in D4

position, between 50 - 62 mph (80 - 100 km/h) for

more than 10 seconds.

4. 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 3 and do the procedure

again.

5. Check for the readiness code with the scan tool.
EVAP Leak Monitor

NOTE:

• When the battery negative cable is disconnected, all

readiness codes are cleared.

• If the engine is stopped while doing the procedure

between stops 6 and 16, do this procedure from step

1 again.

1. Make sure the gasoline level is 60 - 90% of fuel tank

capacity (not full).

2. Turn the ignition switch OFF.

3. Let the vehicle sit more than 8 hours.

4. '96 - 97 models:

Make sure the outside temperature is 32 - 95°F (0 -

35°C).

'98 - 01 models:

Make sure the outside temperature is 20 - 95°F (-7 -

35°C).

5. Connect the scan tool to the Data Link Connector

(DLC).

6. Start the engine and drive for about 15 minutes.

7. '96 - 97 models:

Keep the vehicle at a steady speed between 50 - 62

mph (80 - 100 km/h), without moving the accelera-

tor pedal, for about 1 minute.

'98 - 01 models:

Keep the vehicle at a steady speed between 50 - 70

mph (80 - 114 km/h), without moving the accelera-

tor pedal, for about 1 minute.

8. Stop the vehicle (do not stop engine).

9. Repeat steps 7 and 8 two more times.

10. Check for the readiness code with the scan tool. If

the readiness code does not set, go to step 11.

11. When ambient temperature is less than 32°F (0°C),

hold the engine at 3,000 rpm with no load (in Park

or neutral) until the radiator fan comes on.

12. When ambient temperature is more than 86°F

(30°C), remove the fuel fill cap, then install the fuel

fill cap.

13. After step 12, drive for about 20 minutes on a free-

way.

14. '96 - 97 models:

Keep the vehicle at a steady speed between 50 - 62

mph (80 - 100 km/h), without moving the accelera-

tor pedal, for about 1 minute.

'98 - 01 models:

Keep the vehicle at a steady speed between 50 - 70

mph (80 - 114 km/h), without moving the accelera-

tor pedal, for about 1 minute.

15. Stop the vehicle (do not stop the engine).

16. Repeat steps 14 and 15 two more times.

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

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

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

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 ?
ProCarManuals.com

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
YESProCarManuals.com