battery HONDA INTEGRA 1994 4.G Workshop Manual

,,
SUPPLEMENTAL RESTRAINT SYSTEM (SRS}
The Integra SRS includes a driver's airbag, located in the steering wheel hub. ln addition, all mod€ls excepi tna
Rs model for canada have a front passenger's airbsg located in the dashboard above the glove box, InformaUon
necessary to safely service the SRS is included in this servica Manual. ltems marked with an sstorisk (r) on thr
contents page include, or are located near, SRS components. Servicing. disassembling or roplacing thea6 ltems
will require special precautions and tools, and should thoreiore be done by an authorhed Acura dealer.
' To avoid rondering ths sRS inoporativo, which could lard to porronll Injury or darth In thc cvant ot. r.yr.
trontal collision, all sRs sorvico work must be pcrformcd by !n ruthorizcd Acu.! daerrr,
' lmpTopor 3orvica proceduroa, including inco.roct r.movd r d Installation of tha SRS, could Lld to pc[onc Inlu-
ry caussd by unintsntional activation ot tho airbags.
' All sRs oloctrical wiring harnoa$! aro coverod with yallow In3ulatlon, Rcbtcd componcnts arc bcrtad In tha
stoering Golumn, front console, dsrhboa.d, and darhboard lowor plnol, lnd in thc d$hbolrd abovc tha gaov!
bor. Do not uas oloctdcal te$ oquipmont on thaaa citcuhs.
NoTE: The original radio has a coded thett protection circuit. Be sure to get the customer's code numb6r b€lore* disconnecting the battery.
- removing the No. 32 (7.S A) fuse Jrom the undsr-hood fuse/relay box.
- removing the radio.
After service, reconnect power to the radio and turn it on. When the word ,,CODE,, is displayed, enter the cus_
tomer's 5-digit code to restore radio oDerauon.

Warning/Caution Label Locations
(cont'd)
SERVICE INFORMATION
C)
SPARK PtUG
II{FORMATIONBATTERY CAUTION
AIR CLEAI{€R, RECOM-
MENDEO OIL and
FILTER SERVICE
RADIATOR CAP
CAUTIOI{
TIRE INFORMATION
{300()R)
TIRE INFORMATIOII
t4DOOR)
1-8

Engine Removal/lnstallation
@a Make sure jacks and safety stands aro placed ploper-
ly and hoisl brackots arg attachod to the correct po-
sitions on tho engine (se€ ssction 1).
a Mak€ sure tho car willnot roll off stands and tallwhile
you are wotking under it'
CAUTION:
a Use fendet covals to avoid damaging painted
sudaces.
r Unspecified itsms alo common
a Unplug tho widng connectots carefully while holding
the couplor and tha connector portion to avoid
oamage.
a Mark all wiring and hoses to avoid misconnection.
Also, be sulo that thsy do not contact other wiring
or hoses, or interfere with oth€l parts.
NOTE: Anti-theft radios have a coded theft ptotection
circuit. Be sure to get the customer's code number beJore
- Disconnecting the batterY.
- Removing the No. 32 (7.5 A) fuse from the under-
hood tuse/relay box.- Removing the radio
Atter service, reconnect power to the radio and turn it
on. When the word "CODE" is displayed, enter the cus-
tomer's 5-digit code to restore radio operataon.
1. Remove the hood (see section 2O).
2. Remove the strut brace
8 x 1.25 mm24 N.m (2.4 kgf.m,17 rbt.ft)
Disconnect the battery negative terminal lirst. then
the positive terminal.
Disconnect the battery cables from the undel-hood
fuse/relay box and under-hood ABS fuse/relay box.
6 x l.O mm9.8 N.m (1 .O kgf'm,7.2 rbl.ftl
{cont'd)
STRUT ERACE
BATTERY CABLES
5-3

Gylinder Head
Removal
I
t
Engine removal is not required for this procedure.
CAUTION: To avoid damaging tho cylinder head, wait
until tho ongino coolant temporature drops bolow 100"F
{38"C) beforo loo36ning the rotainin0 bolts.
NOTE:
. Inspect the timing belt before removing the cylinder
neao.
. Turn the crankshaft pulley so that the No. 1 piston is
at top dead center (TDCI (page 6-12).
. Mark all emissions hoses before disconnecting them.. Anti-theft radios have a coded theft protection circuit.
Be sure to get the customer's code number before.- Disconnecting the battery.- Removing the No. 32 (7.5 A) fuse irom the under-
hood fuse/relay box.- Removing the radio.
After service, reconnect oower to the radio and turn it
on.
When the word "CODE" is displayed, enter the cus-
tomer's 5-digit code to restore radio operation.
1. Disconnect the negative terminalfrom the battery.
2. Drain the engine coolant (see page 10-5).
. Remove the radiator cap to speed draining.
3. Relieve fuel pressure (see Section 1 1).
@ Do not smoke whils working on tusl
systom, keep opon flame or spark away trom work
area. Drain fuol only inlo an approvod containsr.
4. Disconnect the fuel feed hose.
SERVIC€ BOLT
WASHERSReplace.
5, Remove the intake air duct.
Remove the breather
evaporative emission
hose, water bypass hose and(EVAP) control canister hose.

VTEC
Troubleshooting FlowchartVTEC Pressure Switch (cont'dl
lFrom pag6 6-39)
Disconnsct lhe 1P connectortrom the VTEC sol6noid valve.
Attach the battery positivo torminal to the GRN/WHT terminal.
Start the engine and chgck oilpressure at 5,000 rpm (lor VTECoil pr€ssure test).
ls pressure above 400 kPa(4kgt/cm,, 60 psi)?In.p.ct th. VIEC .olrnoid v.lv..
Check tor continuity betwe6n the2 terminsls on th€ VTEC prsssure
switch !nder above condition.
Sub.titut. . klown-eood ECMand rachack. |f aymplom/indica-tion goaa away rrplaca th. o?igi-n.l ECM.
u
OOMMERCIALLY AVAILABIIOIL PRESSURE GAUGE
GAUGE JOIMf ADAPIORSNAPON MT2S1'10x 1.0 mm. Use new washer wheninstalling th6 soaling bolt.NOTE:Keep moasuring tim6 as shon 6s possi-
ble because engine i5 running with noload lless than ono minuto).

Cylinder Head
Removal
Engine removal is not required or this procedure.
CAUTION: To avoid damaging tho cylinder head, wail
u[tilths.nginc coolant tsmperaturo drops bolow 100"F(38'Cl bafore loos6ning tho retaining bolts.
NOTE;
. Inspect the timing belt before removing the cylinder
head.
Turn the crankshaft pulley so that the No. 1 piston is
at top dead center (TDc) {page 6-51).
Mark all emissions hoses betore disconnecting them.
Anti-theft radios have a coded theft protection circuit.
Be sure to get the customer's code number before- Disconnecting the battery.- Removing the No.32 (7.5 A) fuse trom the under-
hood fuse/relay box.- Removing the radio.
After service, reconnect power to the radio 8nd turn it
on.
When the word "CODE" is displaved. enter the cus-
tomer's 5-digit code to restore radio operation,
Disconnect the negative terminal from the battery.
Drain the engine coolant (see page 10-5).
. Remove the radiator cap to speed draining.
Relieve fuel pressure (see section 111.
l@ Do not 3moke whilo working on fuel
a
a
'1.
systgm. ko6p opon tlamo ot Spark away trom work
aroa. Drain fugl only into an approved containsr,
4. Disconnect the fuel feed hose.
SERVIC€ BOLT15 N.m (1.5 kgtm, rl bf.tt)WASHERSReplace.
BANJO BOLT
5. Remove th€ strut brace,
6. Remove the intake air duct.
8 x 1.25 mm24 N.m (2.1kg[.m, 17 lbtftl
INTAKE AIR
(cont'd)
6-55

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

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

(From page 1l-44)
Measure voltage between 426
{- ) and the following: B'1 (+ } andA25 {+ t.
- Ropsir opon in YEL/BLK wirobotwoon ECM (425, 81l andPGM-FI m6in relay.- Chock PGM-FI main rclay andwiring connectors at PIGM-FImain.olay (soe psg6 11-1121.
ls there battery voltage?
Measure voltage between bodyground and the tollowing termi-nals individually: A23. A24, A26,42.
- noprir opon in BLK wit. b6-twson ECM 1A23, A24l andG'101 {locatod al th6.mostathousingl.Repair opon in BRN/BLK witebotweon ECM (A26, B2l andGl0r.
ls there less then 1.0 V?
Substitut6 r known{ood ECM
and r6chock. lf symptom/indica-tion goos away, roplaco tho origi-nal ECM.
BATTERYVOLTAGET
ooooooooooo
oooooooooooooooooooooo
ooooooooooo
oooooooo
ooooooo
L€ss than 1.0 V?
11-45

* Monitor over a 5 minute Deriod unl6ssthe current drops below O.1A im-mediatelv.
BATTERYVOLTAGE?
L-E;
o ooooooooo ooo I ooooo oooooooooooooo
oo Qoooooooooo I oooooo ooooooooooooo
Connect the test harness "A"
connector to the main wire harness only, not the ECM (see page
1 1-371.
Connect an ammetet between ter-minals A6 {+ ) and 426 (- )
Turn the ignition switch ON.
ls the current less than0.1 A?.
Subrtitulo s known-good ECM.nd r.ch6ck. lf symptom/indica-tion goes away. roplaco tho origi-n.l ECM.
Connoct the test harn€ss "A"
connector to the main wire har-n6ss only. not th€ €CM {seo page't't-37).
Turn the ignition switch ON.
Measwe vohage bstween A6 {+ }tg.minal and A23 {-)terminal.
Ropsii op6n in ORN/BLK wiro bo-tw..n ECM {A6l and tho HO2S.
Subrtiluto s known{ood ECMlnd Echock. ll .ympiom/indic{-tirn god !way, '.pLc! f|e origl-h.l ECM.
11-49