1998 ACURA INTEGRA Service Repair Manual

Cap Testing
1.Remove the radiator cap, wet its seal with engine
coolant, then install it on the pressure tester.
Apply a pressure of:
93 123 kPa(0.95 1.25 kgf/cm', 13.5 17.8 psi)
Check for a drop in pressure.
2.
3.
AOAPTOR(for small cap)
PRESSURE TESTER
Radiator
Pressure Testing
1. Wait until the engine is cool, then carefully remove
the radiator cap and fill the radiator with engine
coolant to the top ot the filler neck.
2. Attach the pressure tester to the radiator and apply
a pressure of:
93 123 kPa(O.95- 1.25 kgf/cmr, 13.5-'17.8 psi)
3. Inspect lor engine coolant leaks and a drop inpressure.
4. Remove the tester and reinstall the radiator cap.
NOTE:
a Check for engine oil in the engine coolant and/orcoolant in the engine oil.a Check for ATF in the engine coolant and/orcoolant in the ATF {A/T}.
\
PRESSURE TESTES
AOAPTOR{for small cap)

Thermostat
Replacement
NOTE: Use new gaskets and O-rings when reas'
sembling.
GROUNDTERMINAL
6 x 1.0 mm12 N.m {1.2 kgt.m,8.7 lbf.ft)
THERMOSTATInstall with pin up.O RINGReplace
ECT SWITCH27 N.m {2.8 kgf.m, 20 lbf.ftl
J
1.
Replace _thermostat if it as open at room temperature.
To test a closed thermostat:
Suspend the thermostat in a container of water as
shown.
Heat the water and check the temperature with a
thermometer. Check the temperature at which the
thermostat lirst opens and at full litt.
CAUTION: Do not let the ihermometer touch the
bottom of the hot container.
Measure the lilt height of the thermostat when it's
fully open.
STANDARD THERMOSTAT
Lift height: above 8.0 mm (O.31 inr
Stalts opening: 169- 1760 F (76-8OoC)
Fully open: 194o F l9OoCl
THERMOMETER
THERMOSTAT
2.
3.
10-g
. )

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

Inspection
Remove the timing belt (81881 engine: see page 6-10, B'l8Cl,818C5 engines: see page 6-48).
Tu.n the water pump pulley counterclockwise.Check that it turn freely.
Check for sign6 of seal leakage.
NOTE: A small amount of "weeping" trom thebleed hole is normal.
BLEED HOLE
Remove the timing belt (81881 engine: see page 6-
10,818C1, Bl8C5 engines: see page 6-48).
Remove the camshaft pulleys and the back cover(B'1881 engine: see page 6-20, 818C1, 818C5
engines: see page 6-60).
Remove the water pump by removing flve bolts.
NOTE: Inspect, repair and clean the O-ring groove
and mating surface with the cylinder block,
Replacement
6 x 1.0 mm12 N.m 11.2 kgt.m,8.7 tbf.tt)
4. Install the water pump in the reverse order ofremoval.
a Keep the O-ring in position when installing.a Clean the spilled engine coolant.
BLEED HOL€
10-1 1

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

I
l
t
Special Tools
L
Ref. No. Tool NumberDescriptionOty J Page Reference
O A973x - 041 - xxxxx
a 07JAZ - 0010008
i0
I
oTPAZ-oo1o1oo
@ oTsAz - ooloooA
O 07406 - oo4oool
Vacuum Pump/Gauge,0 - 30 in.Hg
Vacuum/Pressure Gauge, 0 - 4 in.Hg
SCS Service Connector
Backprobe Set
Fuel Pressure Gauge
1 't1-135, 146, 141,
149, 151
1 ] 1 1-'151
1 11-32,51,70, AO,
86, 139
2 | 11-34
r I ir-1jg,121
11-2

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)'

Component Locations
Index (cont'dl
B18C1 engine:
THROTTLEPOSITION (TP}
SENSORTroubleshooting,page 1 'l -63
MANIFOLD AESOLUTEPRESSURE IMAP) SENSORTroubleshooting, page 11_54
INTAKE AIR TEMPERATURE{IATI SENSORTroubleshooting, page 11'58
TOP DEAD CENTER/CRANKSHAFTPOSITION/CYLINOER POSITION
{TDC/CKP/CYP) SENSOR{BUilt into the distributor)Troubleshooting, page 1 1-83
EVAPPURGE CONTROLSOLENOID VALVETroubleshooting,page rr rqo
IDLE AIR CONTROL (IAC) VALVETroubleshooting, page 1 l-100
ELECTRICALLOAD
Troubleshooting,page 11 88
POWER STEERING PRESSURE IPSP}swtTcHTroubleshooting, page 'l1 108
IGNITION CONTROL
;- \
SENSOR {SECONDARY HO2S)
Troubleshooting, Page 1 1_71
(Built into the distributodTesting, section 23
ENGINE COOLANTIECD SENSORTroubleshooting, page 11 60
SECONDARY HEATED
SPEED FLUCTUATION(CKF) SENSORTroubleshooting, page 1 1-90
PRIMARY HEATED OXYGENKNOCK SENSOR IKSITroubleshooling, page 1 1_82SENSOR IPRIMARY HO2S)Troubleshooting, Page 11 67
il\
e)
11-4