Page 157 of 1954

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
Page 158 of 1954
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
Page 170 of 1954

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
Page 345 of 1954
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 ).
ProCarManuals.com
Page 363 of 1954
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
Page 375 of 1954
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
Page 378 of 1954

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
Page 381 of 1954

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 .
ProCarManuals.com