1996 ACURA RL KA9 engine

PGM-FI Syste m
Primar y Heate d Oxyge n Senso r (HO2S ) (Senso r 1 ) (cont'd )
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P2195 : A lo w voltag e proble m in th e Righ t
Primar y Heate d Oxyge n Senso r (H02S ) (Ban k 1 , Senso r 1 ) circuit .
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P2197 : A lo w voltag e proble m in th e Lef t
Primar y Heate d 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 P219 5 and/o r P219 7 ar e
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 lthe radiato r fa n come s on .3. Test-driv e wit h th e transmis -sion in [2 ] 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
wide ope n throttle .
Is DT C P219 5 and/o r P219 7indicated ?
Does i t sta y a t 0. 5 V or less ?
YES
(To pag e 11-55 )
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 terminal s a tC251 , C25 4 (locate d a t righ t shoc k
tower) , C11 9 (righ t primar y H02 S
(Ban k 1 , Senso r 1) ) o r C12 6 (lef tprimar y HO2 S (Ban k 2 , Senso r1))* an d PCM .
NORepai r fue l suppl y system .
Replac e th e HO2S .
*:P015 1
Check 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 yH02S (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 H02 S
(Ban k 1 , Senso r 1 ) o r lef t pri -
mar y H02S * (Ban k 2 , Senso r
1) outpu t voltag e wit h th eHD S o r th e sca n tool .
I
s i t normal ?
Chec
k th e fue l pressure .
ProCarManuals.com

PGM-FI System

Fuel Supply System (cont'd)

Troubleshooting Flowchart

— The MIL has been reported on.

— DTC P0171, P0172, P0174 and/

or P0175 are stored.

Check the fuel pressure.

Is the fuel pressure OK?
NO

YES

Check the Primary HO2S:

1. Start the engine. Hold the

engine at 3,000 rpm with no

load (in Park or neutral) until

the radiator fan comes on.

2. Check the right primary or left

primary* H02S (Sensor 1) out-

put voltage with the HDS or

the scan tool.
Is the fuel pressure too high

or too low?
Check the fuel pressure regulator

and fuel return pipe.

LOW

Check the fuel pump, fuel feed

pipe, fuel filter, and fuel pressure

regulator.

Does it stay at less than 0.3 V

or more than 0.6V?
Replace the HO2S.

NO

Check for a sticking or leaking

EVAP canister purge valve:

With a vacuum pump, apply vacu-

um to the EVAP canister purge

valve from the intake manifold

side.

Does it hold vacuum?
Replace the EVAP canister purge

valve.

YES

Check the EGR system. If it is OK,

replace the fuel injectors.

*: P0174 or P0175ProCarManuals.com

PGM-FI Syste m
Crankshaf t Position/Camshaf t Positio n (CKP/CMP ) (Crankshaf t
Position/Cylinde r Positio n (CKP/CYP) ) Senso r
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0345 : A malfunctio n i n th e circui t o f th e
Crankshaf t Positio n (CKP ) senso r 1 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0349 : A n intermitten t interruptio n proble m of
th e Crankshaf t Positio n (CKP ) senso r 1 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0390 : A malfunctio n in th e circui t o f th e Camshaf t
Positio n (CMP ) (Cylinde r Positio n (CYP) ) senso r 1 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0394 : A n intermitten t interruptio n proble m
o f th e Camshaf t Positio n (CMP ) (Cylinde r Positio n (CYP) ) senso r 1 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P1336 : A n intermitten t interruptio n proble m o f
th e Crankshaf t Positio n (CKP ) senso r 2 .
I Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P1337 : A malfunctio n i n th e circui t o f th e
' Crankshaf t Positio n (CKP ) senso r 2 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P1386 : A n intermitten t interruptio n proble m
o f th e Camshaf t Positio n (CMP ) (Cylinde r Positio n (CYP) ) senso r 2 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P1387 : A malfunctio n i n th e circui t o f th e
Camshaf t Positio n (CMP ) (Cylinde r Positio n (CYP) ) senso r 2 .
Th e CK P Senso r determine s timin g fo r injectio n an d ignitio n o f eac h cylinde r an d als o detect s engin e speed .
Th e CM P (CYP ) Senso r detect s th e positio n o f No . 1 cylinde r fo r sequentia l injectio n t o eac h cylinder . Th e CKP/CM P
(CKP/CYP ) Senso r i s installe d behin d th e fron t camshaf t pulley .
— Th e MI L ha s bee n reporte d on .— DT C P0345 , P0349 , P0390 ,P0394, P1336 , P1337 , P138 6
and/o r P138 7 ar e stored .
Proble m verification :
1. D o th e PC M Rese t Procedure .2. Star t th e engine .
Check fo r a n ope n i n th e CKP /CMP (CKP/CYP ) sensor :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e CKP/CM P(CKP/CYP) 8 P connector .3. Measur e resistanc e betwee nthe terminal s o f th e indicate dsensor (se e table) .
Is ther e 65 0 - 85 0 fl ?
YE S
Chec k fo r a shor t i n th e CKP /CMP (CKP/CYP ) sensor :Check fo r continuit y t o bod ygroun d o n bot h terminal s o f th eindicate d sensor .
CKP PICK-U PCOIL 2
CM P (CYP ) PICK-U PCOIL 1
N O
Intermitten t failure , syste m is O Kat thi s time . Chec k fo r poo r con -nection s o r loos e terminal s a tC251 , C25 5 (locate d a t righ t shoc ktower) , C13 0 (CKP/CM P (CKP /CYP)) senso r an d PCM .
Replac e th e CKP/CM P (CKP/CYP )sensor (se e sectio n 6) .
CK P PICK-U PCOIL1
CMP (CYP ) PICK-U PCOIL 2
CKP/CM P (CKP/CYP ) SENSO R 8 P CONNECTO R
(To pag e 11-65 )Termina l sid e o f mal e terminal s
Is DT C P0345 , P0349 , P0390 , P0394 ,P1336, P1337 , P138 6 and/o r P138 7indicated ?
ProCarManuals.com

Thermostat

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P1486: Range/Performance Problem in

Thermostat.

NOTE: If the DTCs listed below are stored at the same time as DTC P1486, troubleshoot those DTCs first, then recheck for

P1486.

P0107, P0108, P1128, P1129: MAP Sensor

P2227, P2228, P2229: Barometric Pressure Circuit

P1259, P1279: VTEC system

P0401: EGR Flow Insufficient

P0404: EGR Valve Lift Insufficient

P0406: EGR Valve Position Sensor High Voltage

P0125, P0116, P0117, P0118: Engine Coolant Temperature Circuit

P0112, P0113: Intake Air Temperature Circuit

P0345, P0349, P1336, P1337: CKP Sensor 1/2

P0300: Random Misfire

P0301, P0302, P0303, P0304, P0305, P0306: Cylinder 1, 2, 3, 4, 5 or 6 Misfire detected.

P0506, P0507: Idle Control System Malfunction

P0511: Idle Air Control Valve

DTC P1486 can set occasionally when the hood is opened.

Troubleshooting

— The MIL has been reported on.

— DTC P1486 is stored.

1. Turn the ignition Switch OFF.

2. Check the engine coolant

level.

Is the engine coolant level low?

Does the radiator fan keep

running?

YES

Check the radiator fan circuit,

radiator fan switch circuit and

the radiator fan switch.

It they are OK, substitute the

PCM and recheck.

If the symptom/indication goes

away, replace the original PCM.
Refill the engine coolant. If neces-

sary, check the cooling system.

Test the thermostat.
Check for the radiator for circuit:

1. Turn the ignition switch ON

(II).

2. Check the radiator fan.ProCarManuals.com

PGM-FI System

Barometric Pressure (Baro) Sensor

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P2227: A range/performance problem in the

Barometric Pressure (BARO) Sensor circuit.

Is DTC P2227 indicated?
Intermittent failure, system is OK

at this time.

YES

Substitute a known-good PCM

and recheck. If symptom/indica-

tion goes away, replace the origi-

nal
PCM.
Problem verification:

1. Do the PCM reset procedure.

2. Connect the SCS service con-

nector.

3. 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.

4. Test-drive with the transmis-

sion in position.

5. Accelerate for five seconds

using wide open throttle.
— The MIL has been reported on.

— DTC P2227 is stored.ProCarManuals.com

PGM-FI Syste m
MIL Circui t Troubleshootin g
Turn th e ignitio n switc h O N (II )and watc h th e Malfunctio nIndicator Lam p (MIL) .
NOTE:If 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 i s 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 wire betwee n th e PC M (D21 ) an d th e T P sensor , EG Rvalv e positio n sensor , fue l tan k pressur e sensor , TC S contro l valv e angl e senso r
— A loos e No . 2 5 I G 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 connecto r
— A n intermitten t ope n i n th e wir e 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 HD S o r th e sca n too l 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 ?
YES
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 ]
Doe s th e lo w oi l pressur eindicator ligh t com e on ?
NO
YE S
Chec k th e engin e starting :
Tr y t o star t th e engine . (T
o pag e 11-73 )
Repai r shor t o r ope n i n th e
wir e betwee n gaug e rela y
an d gaug e assembly .
Repai r shor t o r ope n i n th e
wir e betwee n METE R (15A )
fus e an d gaug e relay .
Repai r shor t o r ope n i n th e
wir e betwee n NO . 1 3 METE R
(7.5A ) fus e an d gaug e relay .
Tes t th e gaug e relay .
Replac e METE R (ISA ) fus e
and/o r No.1 3 METE R (7.5A )fuse.
Does th e engin e start ?YES
NO
(T o pag e 11-71 ) (T
o pag e 11-75 )
ProCarManuals.com

Idle Contro l Syste m
Idle Contro l Syste m
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0506 : Idl e contro l syste m RP M lowe r tha n
expected .
NOTE : I f DT C P051 1 is store d a t th e sam e tim e a s DT C P0506 , troubleshoo t DT C P051 1 first , the n troubleshoo t DT C P0506 .
Possibl e Caus e
IAC valv e mechanica l malfunctio n
Idl e ai r contro l therma l valv e malfunction
Throttl e bod y clogge d port , imprope r adjustmen t
Intak e manifol d gaske t leakag e
Intak e ai r hos e loos e o r leakin g
Vacuu m hose s leakag e
EC T senso r incorrec t outpu t
Troubleshootin g Flowchar t
— Th e MI L ha s bee n reporte d on .— DT C P050 6 is stored .
Proble m verification :
1. 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 lthe radiato r fa n come s on ,then le t i t idle .2. Chec k th e engin e spee d a tidle wit h no-loa d conditions :headlights, blowe r fan , rea rdefogger , radiato r fan , an d ai rconditione r ar e no t operating .
Is it 65 0 ± 50 rpm ?Intermitten t failure , syste m is O Kat thi s time .
NO
(T o pag e 11-77 )
ProCarManuals.com

Idle Contro l Syste m
Idle Contro l Syste m
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0507 : Idl e contro l syste m RP M highe r tha n
expected .
NOTE: I f DT C P051 1 i s store d a t th e sam e tim e a s DT C P0507 , troubleshoo t DT C P051 1 first , the n troubleshoo t DT C P0507 .
Possibl e Caus e
IA C valv e mechanica l malfunctio n
Idle ai r contro l therma l valv e malfunctio n
Throttle bod y clogge d port , imprope r adjustmen t
Intake manifol d gaske t leakag e
Intak e ai r hos e loos e o r leakin g
Vacuu m hose s leakag e
EC T senso r incorrec t outpu t
Troubleshootin g Flowchar t
— Th e MI L ha s bee n reporte d on .— DT C P050 7 is stored .
Problem verification :1. 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 lthe radiato r fa n come s on ,then le t i t idle .2 Chec k th e engin e spee d a tidle wit h no-loa d conditions :headlights , blowe r fan , rea rdefogger , radiato r fan , an d ai rconditione r ar e no t operating .
Is it 65 0 ± 5 0 rpm ?Intermitten t failure , syste m is O Kat thi s time .
NO
(T o pag e 11-79 )
ProCarManuals.com