Page 102 of 1413
WEC Solenoid Valve Inspection
Disconnect the 1P connector trom the VTEC
solenoid valve.
M€asurs resistance between th€ terminal 8nd body
grouno.
R.3bt!nc!: 1l - 30 O
lf the resistance is within specificstions, romove the
WEC sol€noid valve from the cvlindor hsad, and
check the VTEC solenoid valve filter for clogging.
. lf there is clogging, replacs the engin€ oil filter
and the engine oil.
VTEC SOT.CNOTD
12 tTln 11.2 kg[.m,8.7 lbttt]
6-41
4. lf th6 filter is not clogged, push the VTEC solenoid
valv€ with your finger and check its movement.
. lf VTEC solsnoid valve is normal, check the
engins oil pr€ssure.
6x1.0mm
Page 118 of 1413

ll.Remove the engine wire harness connectors and
wi.e ha.ness clamps from the cylinder head and the
intake manitold.
Four fuel injector connectors
Intake air tempe.ature {lAT) sensor connector
Engine coolant temperature (ECT) sensor con-
nector
TDC/CKP/CYP sensor connector
lgnition coil conn€ctor
ECT gauge sending unit connector
Throttle position (TP) sensor connector
VTEC solenoid valve connector
VTEC Dressure switch connector
Manifold absolute pressure (MAP) sensor con-
nector
ldle air control {lAC) sensor connector
EVAP purge controlsol€noid valvo connector
Intake air bypass {lABl control solenoid valve
conneclor
a
o
a
o
a
a
a
a
a
a
a
a
a
12.
13.
Remove the spsrk plug caps and distributor from
the cylinder head.
Remove the upper radiator hose, heat€r hose and
water bypass hose.
WATER BYPASS
HOSE
6r1.0mm9.8 N.m (1.0 kgt m,1.2 tbtftl
14. Remove the sDlash shield.
Remove the engine ground cable.
Romovo the adjusting bolt and mounting bolts, then
remove the power steering (P/S) pump belt and P/Spump.
. Do not disconnect the P/S hoses.
(cont'dl
15.
6x1.0mm9.8 N.m 11.0 kgl.m,7.2 tbt.ttl
6-57
,l
Page 188 of 1413
Radiator
Replacement
1.Drain the engine coolant.
Remove the upper and lower radiator hoses, and ATF
cooter noses.
Disconnect the fan motor connectors.
Remove the radiator upper brackets, then pull up the
radiator.
5. Remove the fan shroud assemblies and other parts
from radiato..
lnstall the radiator in the reverse order of removal:
NOTE:
a Set the upper and lower cushions securely.
a Fill the radiator and bleed the air.4.
UPPER BRACKETAND CUSHTOl{
RADIATOR CAP
t
e
6 x l.O mm9.8 N.m (1.O kgt.m,7.2 rbf.ft)
6 x 1.0 mm9.8 il.m 11.O kgt'm,7.2 lbr.ftl
FAN MOTOR
CUSHION
SHROUDO-RINGReplace.
6 x 1.0 mm9.8 N.m ('l.O kgl.m,7.2 tbl.ttl
DRAIN PLUG
LOWER RADIATORHOSE
Page 194 of 1413

Fuel and Emissions
Spocial Tools ................ 1 1-2
Compon€nt Location
lndex ................. ...... 11-3
System Description
Vacuum Connectiona .......,.................... 1 1 -8
Efectrical Connections ....,.,.,......,...,,.....,'11-12
Syst€m Connectors ...,...,.................-.--. 11-2O
T.oubloshooting
Troubleshooting Guido .......................... 1 1-32
Self -diagnostic Procedures .,..,............... 1 1 -34
How to Road Flowcharts ...................,... 11-39
PGM-Fl System
Systom Description .............................. 1 l-4O
Troubleshooting Flowcharts
Engine Control Moduls ............... ........... 1 1 -42
Heated Oxygon Sensor ......,.................. 1 1-46
Heated Oxyg€n Sonsol Heatel .....,......... 1 1 -47
Fuel Supply System ..............-............... 1 1-50
Manitold Absolute Pressure
Ssnsor ............................................ 1 1-52
Top D6ad Cente./Crankshatr
Position/Cylindor Position sonsor ........ 1 1 -56
Engine Coolant Tempsrature Sonsor ....... 11-58
Throttlo Position Sonsor ........,..,,........... 1 1-60
Intake Air Temperaturs Sensor ............... 11-62
Baromet c Prsssuro Sensor ......,...,...,..,. 11-64
lgnition Output Signal ........................... 1 1 -66
Vehicle Spe€d Sensor ........................... 1 1 -68
Electdcal Load Dotector ....,...,..........,.... 1 1 -7O
Knock Sensor [818C1 engine] ............... 11-74
A/T Fl Signal A/B ................................. 1 1-76
ldle Contlol System
System Troubleshooting Guide .................. 1 1 -78
Systom Description ........ 11-79
Troubloshooting Flowchans
ldl€ Ail Control Valve ........................... 1 1 -82
Ail Conditioning Signal ......................... 1 1 -84
Altemator FR Signal ............................. 1 1 -86
Automatic Transaxle (A/T) Gear
Position Signal ......... 11-88
Brake Switch Signal ............................. 1 1 -9O
Startel Switch Signal ............................ 11-92
Power Steering Pressure Switch Signal ... 11-93
Fast ldle Thermo Valve ...................,......... 1 1 -94
ldls Speed S€tting .................................... 1 1 -95
Fuel Supply System
Systam Tloubloshooting Guid. .................. 1 1 -97
Fuol Linos ...................... 1'l -98
System Description ........ 11-100
Fuol Prassure ................. 11-100
Fu6l Ini6ctors ................. 11-102
Fuel Pressure Ragulato. .,. 11-106
Fuel Filter ...................... 11-108
Fual Pump ..................... 11-109
PGM-Fl Main F6lay ................................... 1 1"1 1 1
Fuel Tank ...................... t 1-114
Intake Air System
System Troubloshooting Guido .................. 1 1 -1 1 5
Systom Dascription ........ 11-116
Air Clean€r .................... 11-117
Throttls Cable ................'11-118
Throttl8 Body ................ 11-120
lntake Air Bypass Cont.ol Systsm
[B18Cl enginal .,......... 11-123
Intake Manilold [B1881 onginol ................. 11-128
Emission Control System
Systsm Troubleshooting Guido .................. 1 1 -1 29
Systam Doscription ........ 11-130
Tailpips Emission ........... 11-130
Thrae Way Catalytic Convortor ...,...,........., 11-131
Positiva CrankcaEo V6ntilation Systcm .,....., 11-134
Evaporativo Emission Contro|,..,..,.,.,,.,,..,.., 1 1-135
Page 195 of 1413
Special Tools
Ref. No I Tool Numb€rDescription I OtV I Page Reference.
o
@
@
@
@
A973X_041*XXXXX
oTJAZ -O010008
OTLAJ_PT3O1OA
oTPAZ-0010100
o7406-OO40001
Vacuum Pump/Gauge
Vacuum/Pressure Gauge 0-4 in. Hg
Test Harness
SCS Short Connector
Fuel Pressure Gauge
,l
1
1'l
1
1't -'t 20,
140
11-139,'t 1-37
I t -J.+
11-t01,
124,'137,
140
106
o
11-2
Page 198 of 1413
AIR CLEAI{ER IACL)Replacoment,11-117
THROTTLE BODY (T8I
Inspsction, page 1 1-120Disassembfy, page 11'122THROTTLE CABLEInsDection/Adjustment, pages 1 l-'l 18, 1 19
Inslallation, pages 1 1-1 18, 119
POSITIVE CRA KCASEvEt{TtLATtOt{ (PcVl VALVEInspection, psgo 1 l-134
INTAKEAIREYPASS IIABIco TnoLSOLENOIDVALVE (B18Cl .ngino onlylTroubl6shooting,page 1 1-124
INTAKEAIRBYPASS (IABI
co TROLOIAPHRAGM{Bl8C1 ongino onlylTroubleshooting,page 11-124
I
RESONATOR
ENGI]TE CONTROL MODULE {ECM)Selt-diagnostic Procedures, page 1 1-34Troubfeshooting, page 1 1 -42
MAIN RELAYRelay Testing, page 1 1- 111Troubleshooting, pag€ 1 1-112SERVICE CHECX CONNECTOR (2PI
56ll.diagnostic Procedures, page'l 1-34
11-5
Page 212 of 1413
System Description
System Connectors IEngine Compartmentl
{818C1 onginol
ENGINEWIRE HARNESS
t3
c132
c131
UNDER,HOOOFUSE/RELAYaox
c102c222
ct 04c220
MAllrlWIREHARI{ESS
o
11-20
Page 213 of 1413
E:I
I if,l.)
l;TYra-"wrrr. Ile llel/nEo II€ TcRNrwHrtlI ,ITwHr^rJl I
c214
ffi
c1
r+lrl2l
trtr
32
o
c112
r'ft]
IOTBLF------lla lsLx/YEL Ifo lanlr l]l
c111
6
\:-/
lI-FErwHr - l1olGuNlert l-l
cl1
3t
tr
c1c117lB18C1 engine)
/ r\
\^y
IETYEL/€Lh---llohED' ----,,
c216
^Jl
FFIN
c221
ffi
ldlcRr/vEr ---l
NOTE: a Different wires with the same color have been given a number suffix
YEL/BLK1 and YEL/BLK, are not the same).
O: Related to Fuel and Emissions System.
a - Connector of male terminals: View from terminal side- Connector of temale terminals: View from wire side
c215
r'fr]
fi'Twtl-rirllrlerrrltlerl-lfr-Twrr - lll
I@ LWHTTREO I
to distinguish them (for example,
(cont'd)
11-21
cl10
ohN/BLK l|/BL!
ALU/YEL