1998 ACURA INTEGRA sensor

7
30.Disconnect the primary heated oxygen sensor(Primary HO2S) connector, then remove exhaust
pipe A.
818C1 engine:PRIMARYHO2S
8 x 1.25 mm24 N.m 12.4 kgl.m.t7 rbt.fttReplace.
GASKETReplace.
Replace.
SELF-LOCKING I{UT8 r 1.25 mm16 N.m (1 .6 kgf .m,
12 tbt.frtBeplace.
EXHAUSTPIPE A
NUT10 x 1.25 mm54 N.m {5.5 kgt'.n, tlo lbt.ft}Replace.
81881, 818C5 engines:
PRIMARYHO25 CONNECTOF
GASKETReplace.
GASKETReplace.
S€LF.LOCKING NUT
8 x 1.25 mm16 N.m (1.6 kgf'm,12 tbt.fr)Replace.f{UT10 x 1.25 mm54 N.m {5.5 kgf'm,40 lbf.ftlReplace.
8 x 1.25 mm24 N.m (2.4 kgt.m,17 lbf.frlReplace.
31. Remove the shift rod and extension rod {Mff).
8 x 1.25 mm22 N'm 12.2 kgl.m, '16 lbt.ttl
32. Remove the shift cable (A,/T).
I x 1.25 mm22 N-l'. 12.2 kgl.m,16 lbf.frl
SHIFT CABLE
CONTROLLEVER
6 x 'l.O mm14 N.m {1.4 kgf.m, 10 lbt.ft}
SHIFT ROD
RETAINER
SHIFT CABLE
LOCK WASHER
{cont'd)
COVER
5-9

Gylinder Head
Removal (cont'dl
Remove the fuel return hose and positive crankcase
ventilation (PCV) hose.
Remove the brake booster vacuum hose, water
bypass hose and vacuum hose.
ltosE
VACUUM HOSE
6-18
10.
9.
11.
Remove the throttle cable,
Remove the throttle control cable (automatic trans-
mission only).
NOTE:
. Take care not to bend the cable when removing
it. Always replace any kinked cable with a new
one.
. Adjust the throttle cable and throttle control
cable when installing (s€e section 11 and 14).
THROTTLE CONTROLCABLE
ADJUSTING NUT
Remove the engine wire harness connectors and
wire harness clamps f.om the cylinder head and the
intake manifold.
Four fuel injector connectors
Intake air temperature (lATl sensor connector
Engine coolant temperature {ECT) sensor con,
nector
TDC/CKP/CYP sensor connector
lgnition coil connector
ECT gauge sending unit connector
Throttle position (TP) sensor connector
Manifold absolute pressure (MAP) sensor con-
necto r
ldle air control (lAC) valve connector
EVAP purge control solenoid valve connector
Crankshaft speed fluctuation (CKF) sensor con-
nector
a
a
a
a
a
a
a
a
ADJUSTING

.'.,.'.attj
NOTEr Use new O-rings and gaskets when reassembling.CAUTION: Check for folds or scratches on the surlace ot the gasket. Replace with a new gasket if damaged.
818C1 engine:
6 x 1.0 mm11 N.m {1.1 kgt.m8.O tbt.trl
EVAP PURGE CONTROLSOLENOID VALVEINTAKE MANIFOLDReplace if cracked orit mating surfaces are
rAc v4f,vE8e caie{ul notto
IAT SENSOR
8 x 1.25 mm24 N.m 12.4 kgt.m,17 tbf'fr)
22 N.m 12.2 k'l.m,16 lbf.ftl
O-BINGReplace.5x0.8mm6 N.m (0.6 kgI'm,4 tbf.trl
INTAKE AIRBYPASS VALBODY
INTAKE MANIFOLOCHAMBER
8 x 1.25 mm23 N.m 12.3 kgt.m,17 tbf.ft)
8 x 1.25 mm22 N.m 12.2 kgt.m,16 tbt'tr)I x 1.25 mm24 N.m (2.4 kgl.m,17 tbf.ft)8 x 1.25 mm24 N.m (2.4 kgt.m,17 tbf.frl
HEATER BYPASSPIPE
8 x 1.25 mm22 N.m 12.2 kgt.m,16 lbt.fr)THROTTLEEODY
(cont'd)
9-3

J
Exhaust Pipe and Muffler
Replacement
NOTE: Use new gaskets and self-locking nuts when reassembling.
Bl8Bl engine:
HEAT SHIELOS6 x 1.0 mm9.8 N.m (1.0 kgf.m,7.2 lbf.tr)
{
HEAT SHIELD
SELF-LOCKING NUT10 x 1.25 mm33 N.m {3.4 kgt.m,25 rbr.ft)Replace.
24 N.n 12.417 rbf.tr)
BRACKET
8 x 1.25 mm16 N.m {1.6 kgf.m,12 tbf.fttReplace.
33 tbt.tr,
8 x 1.25 mm22 N.m 12.2 kgf.m. 16 lbt.ftlReplace.Tighten the flange nuts in steps,alternating side-to,side.
Replace.
6 x 'l.O mm9.8 N.m l'1.0 kgt.m, 7.2 tbf.ftl
{cont'd}
GASKETSReplace.
ir
li
it
SELF-LOCKING NUTS10 x 1.25 mm54 N.m {5.5 kgf.m,40 tbt.ft)Replace.
TWC Insp€ction:Make a visual check for plugging, meltang orcracking of the catalyst
EXHAUST
/
r cg
HEATEDOXYGEN SENSOR{PRIMARY XO25I/+4 N.m 14.5 kgf.m,
FLASHLIGHT
| ;"1- {' 'PI i ,"*,2ffi - .t"
i t rl= a+-41
I _ _*"
PIPE TIP
8 r 1.25 mm22 N.m 12.2 kgf.m, '16 tbf.ftlReplace.Tighten rhe bolts in steps,altelnating side-to-side.
SECONDARY HEATEDSENSORISECONDARY HO2S}/+4 N.rn 14.5 kgt'm,33 tbr.frl
9-7

818C5 engine:
6x1.0mm9.8 N.m {1.0 kgf.m.7.2lbtft)
EXHAUST PIPE B
8 x 1.25 mm22 N.rn {2.2 kgt.m, 16 lbtftlReplace.Tighten the bolts in steps,alternating side to'side.
SELF.LOCKING NUT10 x 1.25 mrn33 N.m {3.4 kgl.m,2s rbf.ftJReplace.
PRIMARY HEATEDSENSOFIPRIMARY H02S)4,1 N.m (4.5 kgt.m.33 tbf.ftt
SECONDARY HEATEOSENSOR
J
{SECONDARY H02S)4,0 N.m (4.5 kgf.m,33 tbf.ft)10 x 1.25 mm3&t!.m t3.9 kgt.n.28 lbf.ftl. \
ElacKEr -*_____GASKETReplace-
GASKETSReplace.
Replace.
THREE WAYCATALYTICCONVERTERtTwc)Inspection page 9 7
SELF.LOCKING10 x 1.25 mm5a N.m {5.5 kgt m.40 tbf.ftlReplace.
6x1.0mm9.8 N.m (1.0 kgf.m, ?.2 lbt.ftl
10 x 1.25 mm38 N.m 13.9 kgt m,28 lbt.ftlReplace.
8 x 1.25 mm22 N.m 12.2 kgtm, 16lbf.h)Replace.Tighten the flange nuts in steps,alternating side to side.
_@
\

Water Pump
NOTE:
a Use new O-rings and new spgcial bolts when reassembling.
a Use liquid gasket, Part No. O8718 0001.
R;lll$ 818c1. 818c5 ensines:
ECT GAUGE SENDING UNITI N.m 10.9 kg{'m, 7 lbf'ftlApply liquid gasket
to the threads.
lllustrated lndex
6 x 1.0 mm11 N.m (1 .1 kgt.m.8.0 rbf.frt
ECT GAUGESENDING UNIT
818B1 engine:
OUTLET
ECT SWITCH27 N.m {2.8 kgf.m,20 lbf.fr)
ECT SENSOR
ENGINE COOLANTTEMPERATT,IRE IECTI SENSOR18 N'm (1.8 kgt.m, 13lbl'ft)
6 x 1.O mm11 N.m {1.1 kgI.m, 8.0 lbf.ft}
OUTLETCOVER
WATER PUMPInspecl|on,page 10-11
KNOCK SENSOR ADotv trouid oasket31 N.m 13.2 kgt.m, to ."t,nq .uif""".23 lbl.ftl
{818C1. 818C5 engines)
\,
O,RINGReplace.',O-RINGReplace.
6x1.0mm'12 N.m 11.2 kgt.m,8.7 lbI.fr)
THERMOSTAT HOUSINGASSEMBLY
O-RINGSReplace.
6 x 1.0 mm12 N.m (1.2 kgf.m, 8.7 lbI'ft)
COVER
10-10

i
iFuel and Emissions
SDeciaf Toofs ..,...,...............11-2
Component Locations
Index.,..,.,..................................,.,.,.,.,.,..,.,....... 11-3
System Description
Vacuum Connections ..................................,. 11-8
Electrical Connections ................................... 1 1-14
System Connectors ....,.,.,.,............................ 1 1-22
Troubleshooting
Troubfeshooting Procedures ........................ 11.32
Engine Control Module T€rminalArrangement .,.,.,..,.,. 11-39
Diagnostic Trouble Cods Chart .......-.-.......... 11-42
Howto Read Flowcharts ......,..,.,................... 1147
PGM-Fl System
System Description ............ 11-4
Troubleshooting Flowcharts
Engine Control Module ............,...,..,.,........... 11-50
Manifold Absolute PressureSensor...............................,..,.,...,................ 11-54
Intake Air TemDerature Sensor ..........,...,..... 11-58
Engine Coolant TemperatureSensor ....................,.,...,.,........................... 11-60
Throttle Position Sensor .,...........................,. 11-63
Primary Heated Oxygen Sensor(Sensor'l) .......,......,.,. 11-67
Secondary Heated Oxygen Sensorlsensor 2) .................. 11-71
Heated Oxygen Sensor Heater .....................'t1.74
Fuel Supply System ....................................... 1 1-76
Random Mistire ............. 11-78
Misfire Detected in One Cylinder .....,..:,,.,.... 11-79
Knock Sensor .........,.,..,. f -A2
Crankshaft Position/Top Dead Center/Cylinder Position Sensor .,........................ 11-83
Vehicle Speed Sensor .............,.,.,.,....,........... 11-85
Barometric Prsssute Sensor ..,...................... 11-86
Electrical Load Detector ...................,.,.......... 11-88
Crankshaft SDeed FluctuationSensor ...........................................,...,........ 11-90
ECM lnternal Circuit,..............................-......, 11-92
A/T Fl Date Line ............ 11-93
A/T Fl Signal A/B .......... 11-95
I,-1

Component Locations
Index
81881 engine:
TOP DEAD CENTER/CRANKSHAFTPOSITION/CYLINDER POSITION{TDC/CKP/CYP' SENSOR(Built into the distributor)Troubleshooting, page I 1-83
ELECTRICALLOAO
Troubleshooting,page 11-88
MANIFOLD AsSOLUTEPRESSURE IMAP} SENSOFTroubleshooting, psge 1 '1,54EVAPPURGE CONTROLSOLENOID VALVETroubleshooting,page 11-146THROTTLE POSITION {TPI SENSORTroubleshooting, page 11 63
IELO}
IDLE AIR CONTROL IIAC) VALVETroubleshooting, page 1 1-1OO
CRANKSHAFT SPEEDFLUCTUATION {CKF} SENSORTroubJeshoonng. page 1t 90
FAST IDLE THERMO VALVE {A/T modet)Inspection, page 1'l 110
INTAKE AIR TEMPERATURE {IA1 SENSORTroubleshooting, page 1 'l -58
POWER STEERING PRESSURE IPSP}swtTcHTroubleshooting, page 1 1,108
IGNITION CONTROL{Built into thedistributorlTesting, section 23
ENGTNE cooLANT TEnapenerune {ectisensoaTroubleshooting, page 1 1 -60
SECONDARY HEATED OXYGENSENSOR (SECONDARY HO2SITroubleshooting, page 1 1-71PRIMARY HEATEO OXYGENSENSOR {PFIMARY HO2SITroubleshooting, page 1 1-67
lz
(cont'd)'