1996 ACURA RL KA9 check engine

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

Idle Contro l Syste m
Idle Ai r Contro l (IAC ) Valv e
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0511 : A proble m in th e Idl e Ai r Contro l (IAC )
valve circuit .
— Th e MI L ha s bee n reporte d on .
— DTCP051 1 i s stored .
Problem verification :1. D o th e PC M Rese t Procedure .
2 . Star t th e engine .
Is DTC P0511 indicated?
YES
Chec k fo r a n ope n i n the wir e
(IGP 1 line) :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e IA C valv e con -
nector .
3 . Tur n th e ignitio n switc h O N (II) .
4 . Measur e voltag e betwee n bod y
groun d an d th e IA C valv e con -
necto r termina l No . 2 .
I s ther e batter y voltage ?
I s ther e batter y voltage ?
YES
Chec k th e IA C valv e function :
Momentaril y connec t PC M con -
necto r terminal s A 5 an d A1 2 wit h
a jumpe r wir e severa l times .
Doe s th e IA C valv e click ?
YES
Substitut e a known-goo d PC M
an d recheck . I f symptom/indica -
tio n goe s away , replac e th e origi -
nal 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 terminal s a t
C253 , (locate d a t righ t shoc k
tower) , C12 9 (IA C valve ) an d
PCM .
Repai r ope n in th e wir e betwee n
IA C valv e an d PGM-F I mai n relay . Wir
e sid e o f femal e terminal s
Repai r ope n o r shor t i n th e wir e
betwee n PC M (AS ) an d IA C valve .
Replac e th e IA C valve .
ProCarManuals.com

Charging Syste m
Troubleshootin g (cont'd )
(From page 4-25)
Chec k fo r a n ope n in th e IG circuit :
Measur e th e voltag e a t th e No . 1
termina l o f th e 4 P connector .
I s ther e batter y voltage ?
Chec k th e Alternator/Regulator :
1. Tur n th e ignitio n switc h OFF .2. Connec t th e 4 P connecto r t o
th e alternator .
3. Tur n th e ignitio n switc h O N(II).
Doe s th e chargin g syste mlight com e on ?
4. Star t th e engine .
Doe s th e chargin g syste m
ligh t g o off ?
Th e chargin g syste m ligh t circui t
is OK .
Turn th e ignitio n switc h OFF , an drepai r th e ope n circui t i n th e BLK /YEL wire .
ALTERNATO R4P CONNECTO R
Wir e sid e o f
femal e terminal s
Check th e alternator/regulato r
(se e pag e 4-27 ).
Chec k th e alternator/regulato r
(se e pag e 4-27 ).
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Actuator Cable Adjustment

1. Check that the actuator cable moves smoothly with

no binding or sticking.

2. Measure the amount of movement of the output

linkage until the engine speed starts to increase. At

first, the output linkage should be located at the

fully closed position. Free play should be 5 ± 0.5 mm

(0.20
±
0.02 in).

OUTPUT

LINKAGE
ADJUSTING

NUT

FREE PLAY: 5 ± 0.5 mm (0.20 ± 0.02 in)
ACTUATOR

CABLE

3. If the free play is not within specs, move the cable to

the point where the engine speed starts to increase,

and tighten the locknut and adjusting nut.

CABLE

BRACKET
ADJUSTING

NUT

LOCKNUT

ACTUATOR

CABLE
4.

Turn the adjusting nut until it is 5 ± 0.5 mm (0.20 ±

0.02 in) away from the bracket.

5 ± 0.5 mm
(0.20
±
0.02
in)

CABLE

BRACKET

ADJUSTING

NUT

5.

Pull the cable so that the adjusting nut touches the

bracket, and tighten the locknut.

ADJUSTING

NUT

LOCKNUTProCarManuals.com

62. Separate the right engine mount bracket from the

right engine mount, then remove the vacuum hose.

RIGHT ENGINE

MOUNT BRACKET

VACUUM

HOSE

RIGHT ENGINE

MOUNT

63. Separate the left engine mount bracket from the left

engine mount, then remove the vacuum hose.

LEFT ENGINE

MOUNT BRACKET

LEFT ENGINE

MOUNT

VACUUM

HOSE
64. Raise the chain hoist to remove all slack from the

chain.

65. Check that the engine/transmission is completely

free of vacuum hoses, fuel and coolant hoses and

electrical wiring.

66. Slowly raise the engine approximately 150 mm (6 in).

Check once again that all hoses and wires are discon-

nected from the engine/transmission.

67. Raise the engine all the way, and remove it from the

vehicle.ProCarManuals.com

Engine Removal/Installatio n
Installation (cont'd )
5. Instal l th e transmissio n beam , the n tighte n th e bolt s
in th e numbere d sequenc e show n ( ) .
12 x 1.2 5 mm54 N- m (5. 5 kgf-m ,40 Ibf-ft )10 x 1.2 5 mm38 N- m (3. 9 kgf-m ,28 Ibf-ft )
10 x 1.2 5 mm38 N- m (3. 9 kgf-m ,28 Ibf-ft )
6. Tighte n th e lef t fron t moun t mountin g bolt .
12 x 1.2 5 mm74 N- m (7. 5 kgf-m ,52 Ibf-ft )
7. Tighte n th e righ t fron t moun t mountin g bolt .
12 x 1.2 5 mm74 N- m (7. 5 kgf-m ,52 Ibf-ft )
8. D o th e followin g check s an d adjustments :
Chec k tha t th e se t ring s o n th e end s o f th e drive -
shaf t an d intermediat e shaf t clic k int o place .
CAUTION : Us e ne w se t rings .
Adjus t th e shif t cabl e (se e sectio n 14 ).
Adjus t th e throttl e cabl e (se e sectio n 11 ).
Adjus t th e cruis e contro l cabl e (se e sectio n 4 ).
Refil l th e engin e wit h engin e oi l (se e pag e 8-4 ).
Refil l th e transmissio n wit h AT F (se e sectio n 14 ).
Refil l th e differentia l wit h differentia l oi l (se e
sectio n 15 ).
Refil l th e radiato r wit h engin e coolan t (se e pag e
10-5).
Blee d ai r fro m th e coolin g syste m a t th e blee d
bolt wit h th e heate r valv e ope n (se e pag e 10-5 ).
Clea n th e batter y post s an d cabl e terminal s wit h
sandpaper , assembl e them , the n appl y greas e to
preven t corrosion .
Inspec t fo r fue l leakag e (se e sectio n 11 ).
— Afte r assemblin g al l fue l lin e parts , tur n o n
th e ignitio n switc h (d o no t operat e th e starter )
s o tha t th e fue l pum p operate s fo r approxi -
matel y 2 second s an d pressurize s th e fue l
line .
— Repea t thi s operatio n 2 or 3 times , the n chec k
for fue l leakag e a t an y poin t i n th e fue l line .
Ente r th e anti-thef t cod e fo r th e radio , the n ente r
th e customer' s radi o statio n presets .
ProCarManuals.com

Engine Moun t Contro l Syste m
Troubleshootin g Flowchar t
NOTE:
Check th e vacuu m hose s an d line s fo r damag e an d prope r connections .
Refe r t o th e Troubleshootin g Procedure s (se e sectio n 11 ).
Th e engin e vibrate s excessivel y
whe n idling .
Chec k Idl e Speed :
War m u p engin e t o norma l oper -
ating temperatur e (th e coolin gfan come s o n 2 times) .
I s th e idl e spee d les s tha n
70 0 rpm ? Adjus
t th e idl e spee d (se e
sectio n 11 ).
Chec k th e Engin e Moun t Contro l
System:1. Full y depres s th e brak e pedal .
2 . Wit h th e transmissio n i n gear ,
hav e a n assistan t disconnec t
and reconnec t th e IMRC /engine moun t contro l solenoi d
valv e assembl y 6 P connector .
I s ther e a noticeabl e chang e in
idl e smoothnes s whe n th e
IMRC/engin e moun t contro lsolenoi d valv e assembl y 6 P con -
necto r i s disconnected ? Reconnec
t th e IMRC/engin e
moun t contro l solenoi d valv e
assembl y 6 P connector . Th e
engin e moun t contro l syste m isOK .
IMRC/ENGIN E MOUN T
CONTRO L SOLENOI D
VALV E ASSEMBL Y 6P
CONNECTO R
Test th e Engin e Moun t Contro l
Solenoi d Valv e Wire :
1. Shif t t o o r position .
2 . Disconnec t th e IMRC/engin e
moun t contro l solenoi d valv e
assembl y 6 P connector .
3 . Measur e voltag e betwee n th e
No. 3 termina l an d bod y
ground .
Is ther e batter y voltage ? Repai
r ope n i n BLK/YE L wir e
betwee n th e IMRC/engin e
moun t contro l solenoi d valv e
assembl y 6 P connecto r an d PC M
fuse (2 0 A) .
Wir e sid e o f femal e
terminal s
Tes t th e Engin e Moun t Contro l
Solenoi d Valv e Wire :
Measur e voltag e betwee n th e
No . 3 an d No . 6 terminals .
I s ther e batter y voltage ?
NO
(T o pag e 5-21 ) —
Repai r ope n i n L T GR N wir e
betwee n PC M (A17 ) an d th e
IMRC/engin e moun t contro l
solenoi d valv e assembl y 6 P
connector .— If th e wir e i s OK , substitut e a
known-goo d PC M an d recheck .
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