radiator ACURA INTEGRA 1998 Service Repair Manual

Engine Removal/lnstallation
(cont'd)
26. Remove the upper and lower radiator hoses and the
heater hoses.
81881, B18C5 engines:
LOWCR RADIATORHOSE
HEATERHOSE
HEATERHOSE
LOWER RADIATORHOSE, UPPER RADIAToRHOSE
UPPER RADIATOR
,1
ir
..f.
c
5-8
t27. lAutomatic transmission) Remove the ATF cooler
hoses.
Remove the radiator assembly (see page 10-5).
Remove the A,/C compressor.
. Do not disconnect Ay'C hoses.
8 x 1.25 mm24 N.rn 12.4 kgl.m, 17 lbf.ft)
24.
29.
HOSES

Cooling
lllustrated Index ........
Radiator
Replacement ..............
Engine Coolant Refilling and
Bleeding
Cap Testing
Pressure Testing
Thermostat
Replacement ..............
Testing
Water Pump
lllustrated Index .........
Inspection
Replacement ...............
10-2
10-5
10-6
10-8
10-8
10-9
10-9
10-10
10-11
10-11

lllustrated Index
!$!!@ sv"t"m is under high plessure when the
engine is hot, To avoid dangei of releasing scalding
engine coolant, remove the cap only when engine is cool.
Total Cooling System Capacity {lncluding heater and
leservoir)
Bl8Bl engine:
MIT: 6.4 l. {6.8 US qt, 5.6 lmp qt)
Ant 6.7 t (7.1 US qt,5.9 lmp qt)
B18C1, 818C5 engines:
Mfi:6.7 t (7.1 US qt, 5.9 lmp qt)
CAUTION: lf any engine cgolant spills on painted por-
tions of the body, rinse it off immediately.
NOTE:
a Check all cooling system hoses for damage, leaks or
deterioration and replace il necessary.
a Check all hose clamps and retighten if necessary.
a Use new O-rings when reassembling.
RADIATOREngine coolant refilling and bleeding,page 10-6Leak test, page 10 8Inspecl soldered joints andseams for leaks,RAOIATOR CAPPressure test, page 10-8
UPPERRADIA
rl
]
CONDENSERFAN SHROUD{s€o section 22)
6 x 1.0 mm7 N.m {0.7 kgl.m, 5 lbf'ftl
5x0.8mm4.4 N.m (0.45 kgl.m,3.3 tbt.ft)
Blow out dirt from betweencore fins with compressed air.lf insects, etc., are cloggingradiator, wash them o{f withlow paessure water,
TOR HOSE
\*
\sffi((
@)
ATF COOLERHOSES181881 €ngin
S!g
R
U
COOLANTRESERVOIR
M/T: Manual lransmissionA/T: Automatic transmissionATF: Automatic t.ansmission fluid
FAN SHROUD
10-2

Radiator
Replacement
1.
2.
Drain the engine coolant.
Remove the upper and lower radiator hoses, and ATF
cooler hoses.
Disconnect the lan motor connectors.
Remove the radiator upper brackets, then pull up the
radiator.
6 x 'l .0 mm9,8 N.m {1.O kgf.m,7.2 tbl'ltl
UPPER RADIATORHOSE
6 x 1.0 mm9.8 N.m (1.0 kgf.m,7.2 tbt'trl
LOWERCUSHION
CONDENSERFAN SHROUO
FAN MOTOR
ATF COOLERHOSES
COOLING FANSHROUDO-RINGReplace.
6 x 1.O mm9.8 N.m 11.0 kgf.m,7 .2 tbl.ftl
LOWER RADIATORHOSE
FAN MOTORCONNECTOR
5. Remove the tan shroud assemblies and other parts
from radiator.
Install 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.
UPPER BRACKETAND CUSHION
RADIATOR CAP
u
DRAIN PLUG
jit
I
HI
I
fli
ii
lir

Radiator
Engine Coolant Refilling and Bleeding
CAUTION: When pouring engine coolant, be sure to shut
th6 relay box lid and not to l€t coolant spill on th6 el€c-
trical parts or the paint. lf any coolant spills, rinse it off
immediately.
1. Slide the heater temDerature control lever to maxi-
mum heat.
Make sure the engine and radiator are cool to the
touch.
2. Remove the radiator cap.
3. Loosen the drain plug, and drain the coolant.
4. Remove the drain bolt from the cvlinder block.
ji
Ii'
l:ll
ENGINE DRAIN EOLT78 N.m {8.0 kgt'm,54 lbt.ft)Apply liquid gasket tobolt thread when installing.WASHERReplace.
10-6
5. Apply liquid gasket to the drain bolt threads, then
reinstall the bolt with a new washer and tighten it
securely.
6. Tighten the radiator drain plug securely.
7. Remove, drain and reinstall the reservoir. Fillthe tank
halfway to the MAX mark with water, then up to
MAX mark with antifreeze.
COOLANTRESERVOIR
I
I
I

8.Mix the recommended antifreeze with an equal
amount of water in a clean container.
NOTE:
a Use only genuine Honda antifreeze/coolant.
a For best corrosion protection, the coolant concen-
tration must be maintained year-round at 500,6
minimum. Coolant concentrations less than 507o
may not provide sufficient protection against cor,
rosion or freezing.
a Coolant concentrations greater than 60% will im-
pair cooling efliciency and are not recommended.
CAUTION:
a Do not mix different brands of anti-lrcezel
coolants.
a Do not use additional rust inhibitots or anti-tustproducts; they may not be compatible with the
coolant.
Engine Coolant Refill Capacity [including reservoir
{0.6 { (0.6 US qt, 0.5 lmp qr)ll:
81881 engine:
Ml7:1-1t {/t.6 US qt. 3.9 lmp qtl
818B1, 818C1 engin€s:
AlTt 1.7 | 15.0 US qt, 4.1 lmp qt)
818C1, B18C5 engines:
MlTt 1.7 t 15.0 US $, 4.1 lmp qtl
FILLER NECK
9.Pour coolant into the radiator up to the base of the
tiller neck.
10. Startthe engine and let jt run until itwarmsup(the
radiator fan comes on at least twice).
1 1 . Turn olf the engine. Check the level in the radiator,
add coolant if needed.
'12. Put the radiator cap on tightly, then run the engine
again and check for leaks.
10-7

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)

Engine Control Module Terminal Arrangement
ECM CONNECTOR A I32P}
ECM CONNECTOR A I32PI
*1: USA*2:818C1 engine*3:A,/T*4: 818C1, 818C5 engines
female terminals
NOTEr Standard battery voltageis 12 V.
{cont'di
LG22A
TerminalWireTerminal nameDescriptionSignal
YELlNJ4 (No. 4 FUEL INJECTOR)Drives No. 4 fuel iniector.With engine running: pulses2BLUlNJ3 (No.3 FUEL INJECTOR)Drives No. 3 fuel injector.
3REDlNJ2 (No.2 FUEL INJECTOB)Drives No.2 fuel injector.
BRNlNJl (No. 1 FUEL INJECTOR)Drives No. l Iuel iniector.
5GRN/REDS 02SHTC (SECONDARY
HEATED OXYGEN SENSORHEATER CONTROL)
Drives secondary heated oxygensensor heater,With ignition switch ON (ll)i battery volrageWith fully warmed up engine runningiduty controlled
6ORN/BLKP O2SHTC {PRIMARY HEAIEDOXYGEN SENSOB HEAIERCONTFOL)
Draves primary heated oxygensensor heater,With ignition swirch ON (ll): battery voltageWith lully warmed up engine running:duty controlled
84G RNI/ELVTS (VTEC
SOLENOID VALVE)Drives VTEC solenoid valve.With engine at low rpm: 0 VWith engine at high rpm: battery voltageIBRN/BLKLG1 (LOGIC GROUND)Ground for the ECM control circuit.Less than 1.0 V at alltimes10BLKPGl (POWER GROUND)Ground for the EC[, power circuit.Less than 1.0 V at all times't'lYEUBLKIGPl {POWER SOURCE)Power source for the ECMcontrolcircuit.With ignition switch ON 1ll): battery voltageWith ignition switch OFF| 0 V
12BLI(8LUIACV(IDLE AIR CONTROL VALVE}Drives IACV.With engine running: about 6 V 10 V(depending on engine speed)
REDPCS (EVAP PURGE CONTROLSOLENOID VALVE)Drives EVAP purge controlsolenoid valve.Wilh engane running, engine coolant above154"F (68'C): duty controlled
GRN/BLUFLR (FUEL PUMP RELAY)Drives fuel pump relay.0 V for two seconds after turning ignitionswitch ON (ll), then battery voltage
17B LVBEDACC (fuC CLUTCH RELAY)Drives A,/C clulch relay.With compressor ON: 0 VWith compressor OFFt baftery voltage
18GRN/ORNMIL (I\4ALFUNCTION
INDICATOR LAMPiDrives MlL.With MIL turned ON:0 VWjth MIL turned OFF: battery vottage
19*,WHT/GRNALTC (ALTERNATOR
CONTROL)Sends alternator control signal,With fully warmed up engine runninglbattery voltageDuring driving with small electrical load: 0 V
20YEUGRNICM (IGNITION CONTROLMODULE)Sends ignition pulse.With ignition switch ON (ll): battery voltageWith engine running: about'10 V(depending on engine speed)22BRN/BLKLG2 (LOGIC GROUND)Ground forthe ECM controlcifcuit.Less than 1.0 V at all times8LKPG2 (POWEfl GROUND)Ground for the ECM power circuit.Less than 1.0 V at all times
24YEUELKIGP2 (POWER SOURCE)Power source for the ECMcontrolcircuit,With ignition switch ON {lli: battery voltageWith ignition switch OFF: 0 V
25*3WHT/BLKVREF (REFERENCE VOLTAGE)Provides reference voltage toother control units,With ignition swirch ON (ll): about 5 VWath ignition switch OFF: 0 V
26. 'PNK/8LU
IAB SOL (INTAKE AIR BYPASSCONTROL SOLENOID VALVE)Drives IAB conlrol solenoidWith engrne running, engrae speed betow5,750 rpm: battery voltageWith engine running, engine speed above5,750 rpm: 0 V
27* IGRNFANC (BADIATOR FANCONTROL)Drives radiator fan relay.With radiator {an running: 0 VWith radiator Ian stopped: battery voltage
2ABLU2WBS (EVAP BYPASSSOLENOID VALVE)Drives EVAP bypass solenoidWith ignition switch ON (ll): battery vottage
29LT GRNVSV (EVAP CONlROLCANISTER VENT SHUT VAVLE)Drives EVAP control canister ventshut valve.Wilh ignilion switch ON lll): banery votrasc
1 1-39

PGM-FI System
System Description
ENGINE CONTROL MODULE (ECM)OUTPUTS
*1: USA*2: 818C1 engine*3: A,/T*4: 818C1, 818C5 engines
PGM-FI Sy3tem
The PGM-Fl system on this model is a sequential multiport fuel injection system.
Fuel lniector Timing and Duration
The ECM contains memories for the basic discharge durations at various engine speeds and manifold pressures. The
basic discharge duration, after being read out from the memory. is further modified by signals sent from various sensors
to obtain the final discharge duration.
ldle Air Control
ldle Ai. Control Valve (lAC Valve)
When the engine is cold, the Ay'C compressor is on. the transmission is in gear (Ay'T only)the brake pedal is depressed, the
P/S load is high, or the alternator is charging, the ECM controls current to the IAC Valve to maintain correct idle speed.
lgnition Timing Control
. The ECM contains memories for basic ignition timing atvarious engine speeds and manifold pressures, lgnitiontiming
is also adjusted for engine coolant temperature.
. AKnockControl System isadoptedwhich sets the ideal ignition timing for the octane n um ber of gasoline used*r,
Other Control Functions
L Starting Control
When the engine is started, the ECM provides a rich mi{ure by increasing fuel injector duration.
2. Fuel PumD Control
. When the ignition switch is initially turned on, the ECM supplies ground to the PGM-FI main relay that supplies
current to the fuel pump for two seconds to pressurize the fuel system.
. When the engine is running, the ECM supplies ground to the PGM-FI main relay that supplies current to the fuel
DUmO.
. When the engine is not running and the ignition is on. the ECM cuts ground to the PGM-FI main relay which cuts
current to the fuel oumo.
INPUTS
TDc/CKP/CYP Sensor
CKF Sensor
MAP Sensor
ECT Sensor
IAT Sensor
TP Sensor
HO2S
VSS
BARO Sensor
ELD*1
Starter Signal
ALT FR Signal
Air Conditioning Signal
A,/T Gear Position Signal*3
Battery Voltage (lGN.1)
Brake Switch Signal
PSP Switch Signal*'
Knock Sensor*1
VTEC Pressure Switch*4
Fuel Tank Prssure Sensor
Fuel InjectorTiming and Duration
Electronic ldle Control
Other Control Functions
lgnition Timing Control
ECM Back-uD Functions
Fuel-lnjectors
PGM-Fl Main Relay (Fuel Pump)
MIL
IAC Valve
A,/C Compressor Clutch Relay
Radiator Fan Belay*1
Condenser Fan Relay
ALT*1
rcM
EVAP Purge Control Solenoid
Valve
H02S Heater
VTEC Solenoid Valve*'
IAB Control Solenoid Valve*,
EVAP Bypass Solenoid Valve
EVAP Control Canister Vent
Shut Valve
11-48

PGM-FI System
Manifold Absolute Pressure (MAPI Sensor (cont'dl
tF'r'sl li:"J:ilfi::il***:ilHi""k:"
code (Drc) P0108' A hish vo*ase (row vacuum) probrem in the
Thc MIL has b6en reoortod on.OTC P0108 is stored.
Problem veritication:1. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on, thenlet it idle.2. Check the MAP wlth the scantool,
Intermittent f.ilure, svstem is OKal this time. Check lor Door con-nections or loose wires at C114{MAP sensor} and ECM.
ls 101 kPa (760 mmHg,30.0 in.l-lg),1.0 V or higher indicated?
Chock tor an opcn in th. MAPs€nsoa:1. Turn the ignition switch OFF.2. Disconnect the MAP sensor3P connector.3. Install 6 jumper wire betweenthe MAP sensor 3P connectorterminals No.3 and No.2.4. Turn the ignition switch ON (ll).
5. Ch€ck the MAP with the scantool.
ls 101 kPa (760 mmHg,30.0 in.Hg),1.0 V or higher indicated?
Check tor an open in wire (SG1
linel:1. Remove the jumper wire.2, Measure voltage between theMAP sensor 3P connector teFminals No. I and No.2.
Repair open in the wire betweenECM l012l and MAP s€nsor.ls there approx.5 V?
Check for an open in the wire{MAP line):1. Turn the ignition switch OFF.2. Install a jumper wire on theECM co n nector terminalsbetween D3 and Dl2.3. Turn the ignition switch ON lll).4. Check the MAP with the scantool,
ls 101 kPa (760 mmHg,30.0 in.Hg),1.0 V or higher indicated?Repair open in the wires betweenECM {D3, and MAP s6Gor.
Substitut€ a known-good ECMand recheck. It normal MAP isindicaied, rgplace the originalECM.
MAP SENSOR 3P CONNECTOR {C114}
Wire side of female terminals
L
vccr{YEL/RED)
MAP IWHT
JUMPERWIRE
SG1 (GRN/WHT}
Wire side of female terminals
1 1-56
{GRN/WHT)I ] {RED/GRN)
ECM CONNECTOR D {16P}
L