1994 HONDA INTEGRA ac compressor

Cylinder Head
Removal (cont'dlI
12.R€move the spark plug caps and distributor from
the cvlinder head.
Remove the upper radiator hose, heater hose and
water bypass hose.
UPPER RAI'IAYOR
14. Remove th6 solash shield.
WATER BYPASS
9.8 N.m {1.0 kgt m.t.2 tbr.frt
sHtEut
15. Remove the engine ground cable.
Remove the adjusting bolt and mounting bolts, then
remove the power steering (P/S) pump belt 8nd P/S
pump.
. Do not disconnect the P/S hoses.
6x1.0mmADJUSTINGBOLT9.8 N.m 11.0 tgfm,7.2 tbf.ftl
8 x 1.25 mm24 .m (2.akstm, 17lbf.ftl
P/S PUMP
Remov€ the air conditioning (Ay'Cl compressor(see pags 6-10).
R€move the alternator belt (see page 6-10).
Ramove the cruise control actuator.
8 x 1.25 mm2a N.m 12.4 kgt m,
belt
17.
t8
ACTUATOR

Valves, Valve Springs and Valve Seals
Removal
1.
2.
NOTE: ldentify valves and valve springs as they are
removed so that each item can be reinstalled in its oriqi-
nal Dosition.
Tap each valve stem with a plastic mallet to loosen
valve keepers before installing the spring compres-
sor.
lnstall the spring compressor. Compress spring and
remove vatve Keeper.
07757 - PJ10r0A
Installthe special tool as shown.
Remove the valve seal.
COMMERCIALLY AVAILABLEVALVE GUIDE SEAL REMOVERLISLE P/N 5t9d) or KO3350
SEALREMOVER
VALVE SPRING COMPRESSORxo No.3tB. whh r35 JAW o.
lntaks Valvo Dimonsions
A Standard (New): 30.90 - 31.10 mm
|.1.217 - 1.221inl
I Standard (Nowl: 103.80 - 10'1.10 mm
{4.087 - 4.098 inl
C Standard lNow): 6.580 - 6.590 mm
{0.2591 - 0.259/r in}
C Servico Limit 6.55 mm (0.258 inl
D Standlrd (N€w): 1.35 - 1.65 mm
10.053 - 0.065 inl
D Ssrvice Limit: 1.15 mm (0.045 in)
Exhau3t Valve Dim6nsions
A Standard {New): 27.90 - 28.10 mm
11.098 - 1.106 inl
B Standard (Newl: 104.00 - 104.30 mm(4.094 - 4.106 inl
C St.ndard (New): 6.550 - 6.500 mm
10.2579 - 0.2583 inl
C Servico Limit 6.52 mm (0.257 in)
D Standard {New): 1.65 - 1.95 mm
10.065 - 0.077 inl
D Service Limit: 1.,[5 mm (0.057 in)

SpecialTools
Tool NumbarDctcriptionPlea Rctllanca
6-72
6-17
&45
6-43
6-11
6-67
6-71,72
6-67
Valve Guide Reamer, 5.5 mm
Holder Handle
Tappet Adiuster Wrench
Air Stoppet
Pulley Holder Attachment, HEX 50 mm,
Offset
Valv€ Spring Compressor Attachment
Extension
Valve Guide Driver, 5.5 mm
Valve Spring Compressor Attachment
07HAH - PJ7010A or
OTHAH _ PJTOIOB
07JAB - 001020A
07LAA - PR30100
OTLAJ _ PR3O2OA
07MAB. PY3OlOA
OTMAF _ PRgO'IOA
07742 - 0010100
07757 - PJ 1010A
o
@
@
@
/.\
o
o
@
o@
@o@
o@@
6-34

Cylinder Head
Removal (cont'dl
Remove the heat shield from the P/S bracket (see
page 5-18).
Remove the air conditioning (Ay'Cl compressor belt(see page 6-49).
Remove the alternator belt {s€e page 6-49).
Remove the cruise control actuato..
16.
17.
'18.
'19.
ACTUATOR
20. Remove the side engine mount.
10 x 1.25 mm
SIDE ENGINE
12 x 1.25 mrn7a N.m 17.5 kgl.m,5a rbtftl
8 x 1.25 mmN.m 12.4 kgf.m, 17 lbtftl
21. Remove the cylinder head cover.
22. Remove the timing belt (see page 6-49).
23. Remove the camshaft pulleys and back cover.
24. Remove the exhaust manifold.
SELF.LOCKING NUT8 x 1 .25 mm31 N.m {3.2 kgt m, 23 lbf.ftlReplace.
6-58
'ilffi{

Valves, Valve Springs and Valve Seals
Removal
NOTE: ldentify valves and valve springs as they are
removed so that each item can be reinstalled in its orioi-
nal position.
1. Using an appropriate-sized socket and plastic mal-
let. lightly tap the valve retainer to loosen the valve
keepers before installing the valve spring compres-
sor.
Install spring compressor. Compress spring and
remove valve keeper.
VALVE SpRtNG VALVE SPRING
COMPRESSoR COMPRESSoR ATTACHMENT
ATTACHMENT EXTENSION
(cont'd)
Snap-on CFrll
6-67

Piston
lnstallation
'1.
Before installing the piston, apply a coat ofengine oil to the ring grooves and cylinder bores.
lf the crankshaft is already installed:
. Remove the connecting rod caps and slip short
sections of rubber hose ove. the threaded ends
of the connecting rod bolts.
a Install the ring compressor, check that the bear'
ing is securely in place, then position the piston
in the cylinder and tap it in using the wooden
handle of a hammer.
Stop after the ring compressor pops free and
check the connecting rod-to-crank journal align-
ment before tapping piston into place.
. Install the rod caps with bearings, then torque
the nuts,
81881 ongino: 31 N.m {3.2 kgf.m, 23 lbf.ftl
818C1 cngino: 44 N'm 1,t.5 kgf.m, 33 lbf.ftl
lf the crankshaft is not installed:
o Remove the rod caps and bearings. install the
ring compressor, then position the piston in the
cylinder and tap it in using the wooden handle of
a nammer.
. Position all Distons at toD dead center.
CONNECTING RODOIL HOI-E (Br8Bl onginelThe arrow must facethe timing belt sideof the engine. Theconnecting rod oil holemust lace the intak€manifold {81881 €ngine).
NOTE: Maintain downward force on the ring com-
pressor to prevent rings from expanding before
entering the cylinder bore,
BING COMPRESSORUse the wooden handleof a hammer to push ortap the piston into thecylinder bore.
Piston Rings
Replacement
1.Using a ring expander, remove old piston rings.
Clean all ring g.ooves thoroughly.
NOTE:
. Use a squared-oJf broken ring or ring groove
cleaner with blade to fit piston grooves.
. Top ring groove is 1.0 mm (0.039 in) wide, sec-
ond groove is 1.2 mm (0.047 in) wide. and oil
ring groove is 2.8 mm (0.110 in) wide.. File down blade if necessary.
CAUTION: Do not use a wire brush to cloan thr
ring lands, or cut ring lands dsopo. with cl€aning
tool.
NOTE: lf the piston is to be separated from the con-
necting rod, do not install new rings yet.
Install new rings in the prope. sequence and posi-
tion (see page 7-18).
NOTE: Do not use old piston rings.

PGM-FI System
System Description
ENGINE CONTROL MODULE (ECMIOUTPUTS
PGM-Fl System
The PGM-Fl system on this model is a sequential multipon fuel injection system,
Fuol Iniector Timing and Duration
The ECM contains memories tor the basic discharge durations at various engine speeds and manifold pressures. Thebasic discharge duration, after being read out from the memory, is turther modilied by signals sent from vanous sensofsto obtain the final discharge duration.
ldle Air Control
ldle Air Control Valve (lAC Vatve)
When the engine is cold, the A/C compressor is on, the transmission is in gear (A/T only) the brake pedal is depressed,the P/S load is high, or the alternalor is charging, the ECM controls current to the IAC Valve to maintain correct idle soeed.
lgnition Timing Controla The ECM contains mamories for basic ignition timing at various engine speeds and manifold pressures. lgnition timingis also adjusted for engine coolant temperature.a A Knock Control System is also used. when detonation is detected by the knock sensof. the ignition timing is retarded(B18Cl engine).
Other Control Functions
1. Starting Control
When the engine is started. the ECM provides a rich mixture by increasing fuel injector duration.2. Fuel Pump Control
a When the ignition switch is initially turned on, the ECM supplies ground to the PGM-Fl main relay that suppliescurrent to the fuel pump tor two seconds to pressurize the tuel system.a When the engine is running, the ECM supplies gfound to the PGM-Fl main relay that supplies current to the fuel pump.a When the engine is not running and the ignition is on, the ECM cuts ground to the PGM-FI main relav which cutscurrent to the fuel pump.
TDC/CKP/CYP Sensor
MAP Senso.
ECT Sensor
IAT Sensor
TP Sensor
HO2S
vss
BARO Sensor
ELD
Starter Signal
ALT FR Signal
Air Conditioning Signal
A/T Gear Position Signal
Battery Voltage {lcN. 1)
Brake Switch Signal
PSP Switch Signal
Knock Sensor'
VTEC Pressure Switchr
Fuel-lnjectors
PGM-FI Main Relay (Fuel Pump)
MIL
IAC Valve
A/C Compressor Clutch Relay
Radiator Fan Relav
Condenser Fan Relav
ALT
rcM
EVAP Purge Control Solenoid
HO2S Heater
VTEC Solenoid Valve'
IAB Control Solenoid Valve*
lFuet tnjector Timing and Duration]
I Electr..l"ldle Contr;il
Fit'e' contr; Funcrfit
l6tio; Ttntrlg c..trol
tEcM aack-,rp Functiorlsl
': 818C 1 €ngine
11-40

3. Fuel Cut-oft Control
a During deceleration with the throttle valve closed, current to the {uel injectors is cut otJ to improve fuel economy
at speeds over tollowing rpm:
. 8188l engine: 91O tpm (Canada model: 1,O50 rpm)
. 818C1 engine: 95O tpm (Canada model: l,O5O rpm)
a Fuel cut-olf action also takes place when engine speed exceeds, 7,O0O rpm {81 8B1 engine), 8,1O0 rpm (B 18Cl
engine), regardless oI the position of the throttle valve, to protect the engine from ovet-revving.
A/C Compressor Clutch Relay
When the ECM receives a domand for cooling trom the air conditioning system, it del8ys the compressor from being
enetgized, and enriches the mixture to assure smooth transition to the A/C mode.
Evaporative Emission (EVAP) Purge Control Solenoid Valve
When the engine coolant tempersture is below 163oF {73"C), the ECM supplies a ground to the EVAP pu.ge control
solenoid valve which cuts vacuum to the EVAP purge control diaphragm valve.
Intake Air Bypsss (lAB) Control Sol€noid Valve
When the engine rpm is below 5,750 rpm, the IAB control solenoid valve is activated by a signal from the ECM,
intske air flows through the long intake path, then high torque is delivered. At spaeds highe. than 5,750 rpm, the
solenoid valve is deactivated by the ECM, and intake air flows through the short intake path in order to reduce the
resistance in airflow.
ECM fail-safe/bEck-up Functions
1. Fail-sate Function
When an abnormality occurs in a signal from a sensor, the ECM ignores that signal and assumes a pre-progtammed
value tor that sensor that allows the engine to continue to run.
Back-uD Function
When an abnormalitv occurs in the ECM itself, the fuel iniectors are controlled by a back-up citcuit independent of
the system in order to permit minimal driving.
Self-diagnosis Function IMaltunction Indicator Lamp {MlL)1
Wh6n an abnormality occurs in a signal from a sensor, the ECM supplies ground for the MIL and stores the code
in erasable memory. When the ignition is initially turned on, the ECM supplies ground tor the MIL tor two seconds
to check the MIL bulb condition.
Two Trio Detection Method
To prevent tals€ indications, th€ Two Trip Dstection Method is used for the HO2S and fuel metering-related self-
diagnostic tunctions. When an abnormslity occurs, the ECM stores it in its memo.y. Wh€n the ssme sbnormality
recurs alter the ignition switch is turned OFF and ON ag8in, the ECM informs the driver by lighting the MlL.
However, to ease troubleshooting, this function is canc€ll€d when you short the service check connector. The MIL
will then blink immedistelv when an abnormality occurs.
4.
6.
2
4.
11-41