HONDA INTEGRA 1994 4.G Workshop Manual

Fuel Supply System
PGM-Fl Main Relay (cont'dl
BLU
BLU/wHt
Bt-xNOTE:. M/T: Clutch pedal mustbe depressed.. A/T: Transmission in
N or E] position.
BLK/ YEL/YEL BLK
Tloubloshooting
{To page 11 113}
- Engino will not sran.- Inspection oI PGM-FI main re-lay and rolay ha.n6!a.
Check lor continuitv between BLKterminal @ and body ground.
Rapair open in BLK wire botwoonPGM-FI main.el6y and GIO'l llo-catod at thormostot housingl.
Measure the voltage betweenYELMHT terminal @ and bodyground.- Roplaco th. ECU IECMI(15 Allus6 in tho under-hood fu!o/r6-lay box.- Ropair opan or short in theYEL/WHT wil6 botwosn thePGM-FI main rolay and the ECU
{EcMl 115 A} luso.
ls there battery voltage?
Turn the ignition switch ON.
Measure the voltage betweenBLK/YEL terminal @ and bodyground.- Reolac. ths No. 24 ACG {ALT}{lcl {15 A:81881 6ngino, 20A: Bl8Cl engin6) tuse in thoundor-dash fuso/rolaY box.- Ropaii op6n or rhon in thoBLK/YEL wiro botwoen thoPGM-FI main ielay and th€ No.24 ACG {ALT) flG} {'15 A:818Bi ongine, 20 A: 818Cionginol fuso.Turn the ignition switch to theSTART position.
Measure the voltage betweenBLUMHT terminsl @ and bodyground.
- Replaco the l\lo. 18 STARTERSIGNAL {7.5 A} fuso in thoundor-dash fuaa/rolay box.- R6pai. open or short in thoBLU/WHT wire botweon thsPGM-FI main relay and tho No.1A STARTER SIGNAL I7.5 AIluse.
11-112

(From page 'l'l-1121
Roplir op.n in GRI{/BLU wirc bo-tw..n ECM lATl lnd PGM-FImain rolay.
Measure the voltag€ betweenA23l- ) t€rminal and the tollow-ing t€rminals; A25 (+ ) Bl (+ ).
- Ropair opon in rh. YEL/BLKwir. @ b€twoon the ECM1A25, 8tl .nd PGM-FI mrinraLy.- Roplsc. ttro PGM+I min ru4.y.
Turn the ignition switch OFF.
M€asure the voltage betw€en A7(+)torminal and A23 { - } t€rmi-nal when the ignition switch isfirst turned ON for two soconds.
Subrlitutc . known{ood ECM.nd 6chock. lf p..crib.d volt.g.ir now avallablo, rodaco lha otlgi-nsl ECM.
ls there 1.O V or l€ss?
Chod. th6 FGM-FI fioin relay {3o.p6g6 11-1111.
Turn the ignition switch off.
Connect the test harnoss b€tweenthe EcM and conneclors.Oisconnect "A" connector tromthe ECM onlv. not the main wireharness (see page 1'1-37).
Check forGRN/BLUlermrnal.
continuity betweenterminal O and A7
YES
Reconn€ct "4" connector to theECM.
Turn the ignition switch ON.
Bstt.ry vohago?r-----r_-lA23 (-l A25 Bl
Brttaiy voftago?
a7 (+l A23A23 (-)
11-113

Fuel Supply System
Fuel Tank
Replacement
@ oo not smoke while working on fusl syltem. Koep opon flame rway from your wort ar6a.
1. Relieve the fuel pressure {see page 11-1OO).
2. Jack up the car and support with jackstands.
3. Remove the drsin bolt and drain the fuel into an approved container.
4. Remove the rear seat, access Danels and disconnect the 2P and 3P connectors.
5- Remove the EVAP two way valve cover and tuel hose protector.
6. Disconnect the hoses.
CAUTION:
a Whan disconnacling tho hosos, slide back tho clampr, th6n twist horos as you pull, to lvold drmlglng thcm.
a Clean the tlarod roint ot high plossulo hosos thoroughly brforc roconnccling thsm.
7. Place a jack. or other support, under the tank.
8. Remove the strao nuts and let the straDs tall free.
9. Remove the Juel tank.
NOTE: The tank may stick on the undercoat applied to its mount. To remove, caretully pry it off tho mount,
1O. Install a new washer on the dlain bolt, then install psns in the raverse ordgr ot rsmoval.
FUELPUMP
EVAPTWO WAY VALVE
38 l{.m(3.9 kgt'm,28 rbl.ftl
FUELTANK
EVAPTWO WAYVALVECOVER
FUEL TAI{KSTRAPS
tO t{.mll.O kgt'm,7 lbl.frl
11-114

Intake Air System
System Troubleshooting Guide
NOTE: Across 6ach row in the chart, the sub-systems that could be sources of a symtom are ranked in the order they
should be inspected st8rting with O. Find the symptom in the left column, read across to the most likely source, then
ret€r to the page listod at the top of that column. tf inspection shows the system is OK, try the next system @, etc.
181881 onglnol
't 1-11711-118
WHEN COLD FAST IOLE OUT OF SPEC
WHEN WARM IDLE SPEED TOO HIGH
lB18Cl cngin.l
PAGE I sue-svsreu
_\.-..\
sYMPToM \---...-
THROTTLE
CABLE
THROTTLE
BODY
INTAKE AIR
BYPASS (IAB)
CONTROL
AIR CLEANER
AND INTAKE
AIR DUCT
111191't -12011-1241l117
WHEN COLD FAST IDLE OUT OF SPECo
WHEN WARM IDLE SPEED TOO HIGHoo
LOSS OF POWERo@@
11-115

Intake Air System
System Description
The system supplies air for allengine needs. lt consists of the intake air pipe, Air Cleaner (ACL), intake air duct, Throttle
Body (TB), ldle Air Control {lAC) Valve, tast idle thermo valve, and intake manifold.
A resonator in the intake air pipe provides additional silencing as air is drawn into the system.
nacot{TRoLSOLENOIDVALVE
To
ffi -------------+ i'"ii'i''RELAY
VARIOUSSENSORS
IABCONTROLDIAPHRAGMVALVE
-BLK--L EI{GINE- cooLnnt
tFASTIDLETHERMOVALVE
U
INTAKEAIR PIPE
INTAKEAIRDUCT
11-116

Air Cleaner IACL)
ACL Element Rsplacoment
ACL HOUSINGCOVER
ACL ELEMENTClean air cleaner element everv15,OOO miles (24,OOO km) or 'l2 mon-ths and reDlace everv 3O,OOO miles(48,00O km) or 24 months under dus-ty conditions, rough or muddy roads.
AKE AIR OUCT
11-117

Intake Air System
Throttle cable [81881 enginel
1 1-1 18
Inspection/Adiustment
'I . Start the engine. Hold the engine at 3,000 rpm with
no load (A/T in $ or@ oosition, M/T in neutral) until
the radiator fan comes on, then let it idle.
2. Check that the throttle cable operates smoothly with
no binding or sticking. Repair as necessary.
3. Check cable free play at the throttle linkage. Cable
deflection should be 1O-12 mm (O.39-O.47 in.)
DEFLECTION1O- 12 mm1O.39-0.47 in.l
4.lf deflection is not within specs, loosen the locknut
and turn the adjusting nut until the deflection is as
specifled.
With the cable properly adjusted. check the throttle
valve to be sure it opens fully when you push the
accelerator pedal to the floor. Also check the throt-
tle valve to be sure it returns to the idle oosition
whenever you release the accelerator pedal.
Installation
1. Fully open the throttle valve. then install the throt-tle cable in the throttle linkage and install the cablehousing in the cable bracket.
2. Start the engine. Hold the engine at 3,OOO rpm withno load (A/T in S or @ position, M/T in neutrall untilthe radiator tan comes on, then let it idle.
THBOTTLE LII{KCABLEARACKET
i;
-l-r
,)
j
5.
LOCKNUTITINER CABLE
Hold the cable sheath, removing all slack from the
cable.
Turn the adjusting nut until it is 3 mm (O. 12 in.) away
trom the cable bracket.
Tighten the locknut. The cable deflection should now
be 10- 1 2 mm (O.39 -O.47 in.). lf not, see Inspec-
tion/Adjustment.
3 mm {0.12 in)
LOCKNUT1O N.m{1.O kgl.m,7 tbt.ft)

Throttle cable [B18C1 enginel
Inspection/Adiustment
1 . Start the engine. Hold the engine at 3,O0O lpm with
no load in neutral until the radiator fan comes on,
then let it idle.
2. Check that the throttl€ cable operates smoothly with
no binding or sticking. Repair as necessary.
3. Check csble free play at the throttle linkage, Cable
deflection should be 10-12 mm (O.39-O.47 in.)
DEFLECTIOI{10-12 mm(O.39-O.47 in.l
lf deflection is not within sDecs, loosen the locknut
and turn the adjusting nut until the deflection is as
specitied.
With the cable properly adjusted, check the throttle
valve to be sure it opens fully when you push the
accelerator Dedal to the tloor. Also check the throt-
tle valve to be sure it retums to the idle position
whenever vou release the accel€rator pedal.
CABLE BBACKET
ADJUSTING I{UT
lnstallation
1. Fullv open the throttle valve, then install the throt-
tle cable in the throttle linkage and install th€ cable
housing in the cable bracket.
2. Stan the engine. Hold the engine at 3,OOO rpm with
no load in neutral until the radiator fan comes on,
then let it idle.
THROTTLE LI K
With part A of the cabl€ bracket, support the cable
sheath so that there is no inner wire free play. Turn
the adjusting nut until it touches part A, leaving a
gap between the locknut and adiusting nul.
Move the cable sheath to psrt B of the cable brack-
et that so the bracket slides into the gap between
the locknut and adiusting nut. Tighten the locknul.
LOCKT{UTlO t{.m (t.O kgl.m, pART B
5.
4.
7 lbt.ftl{Locked by bracket)ADJUSTING NUT
PABT A
LOCKNUTNO GAP
AIUUSTINGNUT
5, The cable deflection should now be 10-12 mm
{O.39-O.47 in.). lf not, see Inspection/Adiustmsnt
11-119

lntake Air System
Throttle Body
Description
The throttle body is ot the single-barrel side-draft 1ype.
The lower portion of the throttle valve is heated by en-gine coolant from the cylinder head. The idle adjusting
screw which increases/dec.eases bvDass air and the
Evaporative Emission (EVAP) Control Canister port are
located on the top of the throttle body.
IOLE AOJUSTING
THROTTLESTOP SCREW(Non-adiustsb16l
11-120
Insoection
CAUTION: Do not adiust the thlottle stop screw. lt ispreset at the lactory.
1. Start the engine. Hold the engine at 3,OOO rpm with
no load (A/T in S or E position, M/T in neutral) until
the radiator fan comes on, then let it idle.
2. Disconnect the vacuum hose (to the EVAP control
canister) from the top of the throttle body; connect
a vacuum, gauge to the throttle body.
VACUUM PUMPGAUGEA973X-O41-XXXXX
5.
3. Allow the engine to idle and check that the gauge
indicates no vacuum.
a li there is vacuum, check the throttle cable (see
page 1 1-'l 18, 119).
Check that vacuum is indicated on the gauge when
the throttle is opened slightly from idle.
a lf the gauge indicates no vacuum, check the throt-
tle body port. lf the throttle body port is clogged.
clean it with carburetor cleaner.
Stop the engine and check that the throttle cable
operates smoothly without binding or sticking.
a lf there are any abnormalities in the above steps,
check for:
- Excessive wear or Dlav in the throttle valve shaft.
Sticky or binding throttle lever at full close po-
srtron.
Clearance between throttle stop screw and throt-
tle lever at tull close Dosition.

818B1 engino:
There should beno clearance.
THROTTLE STOP SCREW(Non-adiustablel
818Cl engine:
Replace the throttle body if there is excessive play in the
throttle valve shalt or if the shaft is binding or sticking.
THROTTLE LINK
(Non-adjusrablel
11-121