1994 HONDA INTEGRA fuel

Fuel Supply System
Fuel Pump (cont'dl
Tc.ting
@E o" not smoko during tho tesr. Koop openflrmo away fiom your work area.
lf you susp€ct a problem with the tuel pump, check thatthe lusl pump actually runs; when it is ON, you will hearsome noise if you hold your ear to the luel lill oon withthe fuel fill cap remov6d. The fuel pumD should run fortwo seconds, when ignition switch is first turned on. llthe fuel pump does not make noiss, check as tollows;
1. Removo the rear seat (see section 2O).
-'2. Remove the access panel.
3. Disconnect the 2P connector from the fuel pump.
CAUTION: 86 lure to tum th6 ignition switch OFFbotor6 disconnoctlng th€ wilos,
4. Connect the BLK|yEL @ wire 8nd YEL/GRN @ wirewith a iumpe. wire 8t the PGM-FI main relav con-
nectot.
l.t, .--/ re -Fl. . MAll{ RELAY
BL&YELJumper
Check that battery voltage is available at the tuel
pump connector when the ignition switch is turned
ON (positive probe to the YEL/GRN wire, negativeprobe to ths BLK/WHT wire).
ACCESSPANEL
side
YEL/GRN
a lf battery voltage is available, replace the fuel
pump.
a It there is no voltage, check the tusl pump ground
and wire harness {see page I 1-1 l2).
11-110
Roplacomont
@ oo not smoks whilo worklng on fuel syr-
tem. Kaop opon llamos away from your wolk araa.
1. Remove the rear ssats {soe section 2O).
2. Remove the access oanel.
3. Disconnect the 2P connector from the fuel pump.
4. Remove the fuel pump mounting nuts.
5. Remove the fuel pump trom the luel tank.
6. Install a new washer on the banio bolt, then install
Darts in the revers€ order of removal.
6 N.mlO.6 kgl.m,.4 tbt.ftl
27 .m(2.4 kgt.m,21 tbt.ftl

PGM-Fl Main Relay
Doscription
The PGM-Fl main relav actuallv contains two individual
rerays.
This relay is located at the lett side of the cowl.
One relay is energized whenever the ignition is on which
supplies the battery voltage to the ECM, power to the
fuel injectors, and power for the second relay.
The second relay is energized for 2 seconds when the
ignition is switched on, and when the engine is running,
to supply power to the fuel pump.
PGM-FIMAIN RELAY
FUEL PUMP
Relay Testing
NOTE: lf the car stans and continues to r
Fl main relay is OK.
1. Remove the PGM-Fl main relay.
2. Attach the battery positive terminalto
minal and the battery negative termir
1 terminal of the PGM-FI main relay. T
continuity between the No. 5 terminal
minal of the PGM-FI main relay.
a lf there is continuity, go on 10 ste
a lt there is no continuity, replace the
relay and retest.
To lGN. I
To GROUND
To ST. SWITCH
To ECM {47}
Attach the battery positive terminalto
minal and the battery negative termil
3 terminal of rhe PGM-Fl main .elav. Tl
there is continuity between the No. ;
No.6 terminal of the PGM-Fl main re
a lf there is continuity, go on to st€
a lf there is no continuity, replace th€
relay and retest.
Anach the battery positive terminalto
minal and the battery negative termil
1 terminalof the PGM-Fl main relay, Tl
there is continuity between the No. :
No. 4 te.minal of the PGM-Fl main r
a It there is continuitv, the PGM-FI mi
a lf there is no continuity, replace th(
relav and retest.
No.2
run, the PGM-
nalto the No. 2 ter-
terminal to the No.
lay. Then check for
minal and No. 4 ter-
to step 3.
ce the PGM-Fl main
8Ar C)
ECM {425, 81)
J To FUEL PUMP
inalto the No. 5 ter-
terminsl to the No.
ay. Then check that
No. 7 terminal and
ain relay.
to step 4.
ce the PGM-Fl main
inal to the No. 6 ter-
terminal to the No.
ay, Then check that
No. 5 terminal and
nain relay.
-Flmain relay is OK.
ce the PGM-Fl main
(cont'd)
11-111

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

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

A.
Evaporative Emission (EVAPI Controls
Da.cdptlon
Thg avaporstive omission controls are designed to minimize the smount of fusl vapor escaping to the atmosphero. The
system conaists ot the following compon€nts:
Evlporttly. Emlttbn (EVAPI Control Caniltot
An EVAP control canistor is used lor the temporary storage ot fuel vapor until the fuel vapor can be purged lrom
th€ EVAP control canister into the engin€ and burned.
vlpor hr]gG Cmt]ol Syst m
€VAp control canistgr puroing is accomplished by drawing fresh air through tho EVAP control canister and into a
pon on th6 throttl€ body. Th€ purging vacuum is controllsd by the EVAP purge control diaphragm valve end the
EVAP purge control solenoid valve.
C. Ft|.l Tmk Vlpor Control Systom
When fuel vapor prassure in the fuel tank is higher than the set v8lue of the EVAP two way v8lv6, th€ valve opens
and regulates the flow ol fuel vapor to the EVAP control canister.
(cont'd)
11-135

Emission Gontrol System
Evaporative Emission (EVAPI Control (cont'd)
EVAPTWO WAY VALVE
EVAPPURGECONTROLSOLENOIDVALVEFUEL TANKEVAP VALVE
FUELFILL CAPVARIOUSsEt{soRs
BLK
5
EVAP CONTROLCANISTEB
FRESHAIR
11-136

Emission Control System
Evaporative Emission Controls
(cont'dl
Evaporativ€ Emission {EVAPI Two Way Valvo Tasting
l. Remove the tuel fill cao.
2. Remove vapor line trom the two way valve on the
fuel tank and connect to T-fitting trom vacuum
gauge ano vacuum pump as snown.
VACUUM/PRESSURE GAUGEoTJAZ-OOI OOOa
A973X-041-XXXXX
fT-FITTING
Apply vacuum slowly and continuously while watch-
ing the gauge.
Vacuum should stabilize momentarilv at 5-15
mmHg (0.2-0.6 in. Hg).
a It vacuum stabilizes (valve opensl below5mmHg(O.2 in.Hg) or above I 5 mmHg (O.6 in.Hg), install
a new valve and retest.
Move vacuum pump hose from vacuum to pressure
titting, and move vacuum gauge hose trom vacuum
to oressure side as shown.
Pressure should stabilize at 1O-35 mmHg (0.4- 1 .4
in. Hg).
a lf p.essure momentarily stabilizes {valve opensl
at 1O-35 mmHg (O.4- 1.4 in.Hg), the valve is
oK.
a lf pressure stabilizes below 10 mmHg {O.4 in.Hg)
or above 35 mmHg (1 .4 in.Hgl, install a new valve
and retest.
4.
J-.
fF . -,-/ asr^:
,T 4?e
Slowly pressurize the vapor line while watching thegauge.
11-140

Troubleshooting Procedures
when the TcM senses an abnormality in the input or output systems. the E]indicator light in the gaugo assembly willblink.
when the service check Connector {located under the dash on the passenger side} is connected with the specaat toolas shown, the E] indicator light will blink the Diagnostic Trouble iode {DTCI when the ignition switch is turned on.
When the lDil indicator light has been reported on, connect the service check connector with the special tool.Then turn on the ignition switch and observe the @ indicator light.
GAUGE ASSEMSLY
)'t
DAI'A LI]TKcor{r{EcToR (3P)NOTE:Do not atlachjumpe. wire.
Sc. DTCI
So. DTC2
S.. DTC14
scs sHoRT CO[{]{ECTORoTPAZ-OOl0too
codes 1 through I are indicated by individual short blinks, codes 1o through 1 5 are indicated by a series of tong andshon blinks. one long blink equals l0 short blinks. Add the long and short blinks together to dete;mins the cod€. Aft6rdetermining the code, refer to the erectricar system symptom-to-component chart on pages 14-5o and 51.
ahon
f"l
some PGM-FI problems will also make the @ indicator light come on. After repairing the pGM-Fr system, disconnectthe BACK UP tuse (7.5 Al in the under-hood fuse/relay box tor more than 1o seconds to reset the TcM memorv.
NOTE:
a PGM-FI svstem
The PGM-FI system on this model is a sequential multipon fuel iniection svstem.' Disconnecting the BACK UP tuse also cancels the radio anti-theft code, preset stations and the clock setting. G6tthe customer's code numbe. and make note of the radio presets befote temoving the fuse so you can reset them.
14-48