1994 HONDA INTEGRA clutch

Engine Removal/lnstallation
(cont'd)
14.Remove the engine ground cable at the body end.
Remove the adiusting bolt and mounting bolt, then
remove the power steering (P/Sl belt and pump.
a Do not disconnect the P/S hoses.
8 r 1.25 mm24 N.m (2.4 kgf.m. 17 lbl.ftl
6. Loosen the idler pulley bolt and adjusting bolt, then
remove the air conditioning (A/C) compresso. belt.
IDLER PULLEY BOLT10 x 1.25 mm44 N.m 14.5 kgt.m, 33 lbl.ftl
5-6
A/C COMPRESSOR BELT
17. (Manusl transmission) Remove the clutch slave
cylinder and pipe/hose assembly.
a Do not disconnect the pipe/hose assembly.
6 x 1.O rl|mll N.m { 1.1 kgt.m,SLAVE CYLINDER
8.0
8 x 1.25 mm24 N.m {2.4 kgl.m,17 lbt.ftl
18. Remove the transmission ground cable and hose
cramp.
6 x 1.O mm1l N.m 11 ,1 kgt.m,I tbt.ftl

Insrall the left front mount, then tighten the bolts in
the numbered sequence as shown (O-@),
O 12 x 1.25 ]n]n83 N.m 18.5 kst.m,61 lbt.ftlReplace.
@ 12 r 1.25 mm59 N.m {6.0 kgl.n,43 tb{.ftlReplace.
@ 10 r 1.25 mm44 N.m (4.5 kgf.m, 33 lbt.ftl
k-
5-15
a Check that the sp.ing clip on the end of each
driveshaft clicks into place.
GAUTION: Uso oow spring clips.
a Bleed air trom the cooling system at the bleed bolt
with the heater valve open (see page 10-5).
a Adjust the th.ottle cable (see section 1 1).
a Check the clutch pedal tree play lsee section 12).
a Check that the transmission shifts into gear
smoothlv,
a Adiust the tension of the following drive belts.
Alternator belt {s€e section 23).
P/S pump belt {see section 17).
A/C comoressor belt (see section 22).
a Inspect tor fuel leakage (see section 1 1).
. After assembling fuel line parts, turn on the ig-
nition switch (do not operate th€ starter) so
that the Juel pump operates for approximat€-
lV two seconds and the tuel line pressurizes.
Repeat this operation two or three times and
check for fuel leakage at any point in the fuel
line.
(cont'd)

System Description
Electrical Connections
PGM.FI MAII{ RELAY
- rc2l L
IllLii |
ril.i--r {a/Tl
To BAOIATOR FAt!RETAY, CONDENSERFAI{ RELAY
To A/C SWITCH
FUEL INJ€CTORS
@
DATALIIIKco t{EcToR
fUELPUMP
A/C CLUTCH RELAY
FUSES
O BATTERY I1OO AI*
@ oPTroN t50 alr
o rG {50 A).
@ sroP. HoBN {2O Al*
@ BACK UP (7.5 Al*
@ No. 3 INTERIOR LIGHT {7.5 A)
O Ecu (EcMt (1s A)'
@) No. 24 ACG (ALTI 0Gl{15 A: 81881 sngin6,2OA:818C1 6n9ine)
@ No. 15 BAcK-uP LlcHTs llo Al
@ No. 13 REAR DEFROSTER RELAYHEATER MOTOR RELAYCOOLING FAN MOTOR RELAY I7.5 A}
O No. l8 STARTER SIGNAL 17.5 A)
*: UNDER-HOOD FUSE/RELAY BOX
11-12
A/T GEAR

lBl lcl
IT
tl
] I neonr-x
RED/WXT
c449 - C553F- GR[{/OR]{
To RADIATOR FAt{RELAY, COI{D€I{SERFAI{ RELAY
To A/C COTT|PfiESSORCLUTCH RELAY
To A/C SWITCH
(cont'd)
11-17
GAUGE ASSEMALY
{!L rNDrcAToR
["'

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

ldle Gontrol System
Air Conditioning Signal
This signals the ECM when there is a demand for cooling from the air conditioning system.
Connect the t€st harness betweenthe ECM and connectors. Discon-nect "B" connector from the mainwire harness onlv, not the ECM{see page 11-37}.
Turn the ignition switch ON.
Measure voltage between 851+ )lerminal and A26 l- I terrninal.
Sub.litut ! known{ood €CMrnd r6 ls there approx. 5 V?
Turn th€ ignition switch OFF.
Reconnect "8" connector to themain wire harness.
Turn the ignilion switch ON.
Momentarilv connect A15 termi-nalto A26 terminsl severaltimes.
Momsntarilv connect the 8LK/RED t€rminal of the 4P connectoron the A/C clutch rel6v to bodyground sevsral times.
ls there a clicking noise fromthe A/C comDressor clutch?
3o6 rlr condhlohar in-rDactlon llaa lac{ion221.
ls there a clicking nois€ lromth€ A/C comoressor clutch?
Rop.ir opon in BLK/BED wiro be-two.n ECM {A15} and A/C clurchrally.
ooooooooooooo
oooooooooooo
oooooooo
oooooooo
ooooooooooo
ooooooooooo
.pprox. 5 V?
426 (- )
Cllcklng?
lTo page
11-84
-

ldle Gontrol System
Startel Switch Signal
This signals the ECM when the engine is cranking.
BATTERYVOLTAGE?
NOTE:a M/T: Clutch pedal must beoeprgsseo.a A/T: Trsnsmission in lll or LIJ position.
11-92
ooooooooooooo
oooooooooooo
A26 {-}Connect the lest harness botweenthe ECM and connector (see page
11,37).
Measure voltage between 89 (+)
terminal and 426 (-) terminalwith the ignition switch in thestart position.
Inspect No. 18 STARTER SIGNAL{7.5 A) fuse in the under-dashfuse/relav box.ls there batterv voltage?
- Roplac. No. 18STARTER SIG AL(7.5 A) lurc,- Rrpsir lhort In BLU/WHT wir. batwccnECM (89) .nd No.18 STARTER SIG.t{AL {7.5 Al 1u..,PiGM-Fl fi.ln rol.y.
R.palr opon in BLU/WHT wir6 b6-tw€.n ECM lB9l and t{o, 18STARTER SIGNAL 17.5 Al lu.o.
Startor .witch .ign.l is OK.