2003 HONDA CIVIC fuel pump

PGM-FI System
25.
MIL Circuit Troubleshooting (cont'dl
Check for continuity between ECM connector
terminal E9 and body ground.
ECM CONNECTOR E (31P)
Wire side o{ {emale terminals
ls therc continuity?
YES-Go to step 26.
NO Replace the No. lTFUELPUMP(15A)fuse,
and update the ECM if it does not have the latest
software. or substitute a known-good ECM, then
recheck (see page 1 1-6). lf the symptom/indication
goes away with a known-good ECM. replace the
original ECM.I
26. Remove the PGM-Fl main relay 2 (A).
11-100
27. Check for continuity between ECIVI connector
terminal Eg and body ground.
ECM CONNECTOR E 131P)
Wire side oI Jemale terminals
ls there continuity?
YES Repair short in the wire between the No. 17
FU EL PUMP (15A)fuse and the ECM (E9), or
between the No. 17 FUEL PU MP (15 A) fuse and the
PGM-FI main relay 2. Also replace the No. 17 FUEL
PUMP (15A)fuse.l
NO Go to step 28.
Remove the rear seat cushion (see page 20-80).
Remove the access panel from the floor.
Disconnect the fuel pump 5P connector.
\
28.
29.
30.

31. Check for continuity between fuel pump 5P
connector terminal No. 5 and body ground.
FUEL PUMP 5P CONNECTOR
Wire side of temale terminals
ls therc continuity?
YES Repair short in the wire between the fuel
pump and the PGM-Fl main relay 2. Also replace
thE NO. 17 FUEL PUMP (15A) fUSE.T
NO-Go to step 32.
32. Reinstallthe PGM-Fl main relay 2 (A).
33. Check for continuity between fuel pump5P
connector terminal No. 5 and body ground.
FUEL PUMP 5P CONNECTOR
=
Wire side ol lemal€ rerminals
ls there continuity?
YES Replace the PGM-Fl main relay 2. Also
replace the No. 17 FUEL PUMP (15A) fuse.l
NO Check the iuel pump, and replace il if
necessary. Also replace the No. 17 FUEL PUMP(15A) fuse.!
34. Disconnect ECM connector E (31P).
35. Turn the ignition swirch ON {111.
36. Measure voltage between ECM connectorterminal
E9 and body ground.
ECfl CON|{CCIOR E (3rPt
Wire side ol female lerminals
ls there battery voltage?
YES Go to step 37.
NO Repair open in the wire between the No. 17
FUEL PUMP (15A)fuse and the ECM (E9).1
(cont'd)
11-101

PGM-FI System
Injector Replacement (cont'd)
7. Coatthenewo-rings(A)withcleanengineoll,andinserttheinjectors(B) intothefuel rail (C).
8, lnstall the injector clip {D).
9. Coat the injector o-rings (E)with clean engine oil.
10. Installthe injectors intothefuel rail, then install the fuel rail intotheintakemanifold(G).
1 '1. Install the fuel rail mounting nuts, ground cable. and bracket.
12. Connect the connectors to the injectors.
13. Connect the quick-connect fittings.
14. Turnthe ignition switch ON (ll), butdo notoperatethe starter. Afterthefuel pump runs for about 2 seconds, the
fuel pressure in the fuel line rises. Repeat this two or three times. then check for fuel leakage.
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11-112

Fuel Supply System
{
a
Component Location Index
FUEL FEED LINEFUEL PULSATION DAMPERReplacement, page 1 1'154
PGM.FI MAIN RELAY 2Troubleshooting, page'l'l-141
FUEL TUBE/OUICK.CONNECT FITTINGSPrecautions, page 1 1-148Removal, page 11-'149Installation, page 1 1-'l50
FUEL VAPOR LINE
i../
PUMPTest, page 11-141
FUEL FILL CAP
FUEL TANKReplacement, page'l 1-155
PGM.FI MAIN RELAY 1
Fleplacement, page 1 1'1 53FUEL FILTERReplacement, page 1 1-1 52FUEL GAUGE SENDING UNITTest, page 11-156Replacement, page 1 1-153FUEL PRESSUN REGULATORReplacement, page'1 1-'152
11-140

Fuel Pump Circuit Troubleshooting
lf you suspect a problem with the fuel pump, check that
the fuel pump actually runs; when it is on, you will hear
some noise if you listen to the fuel fill port with the fuel
fill cap removed. The fuel pump should run for 2
seconds when the ignition switch is first turned on. lf
the fuel pump does not make noise, check as follows:
1. Turn the ignition switch OFF.
2. Remove the glove box {see page 20-63), then
remove the PGM-FI main relay 2 (A).
Turn the ignition switch ON {ll).
Measure voltage between PGM-Fl main relay 2 5P
connector lerminal No. 5 and body ground.
PGM.FI MAIN RELAY 25P CONNECTOR
IGPl(YEL/BLK}
Wire side of female terminals
ls there battery voltage?
YES-Go to step 5.
NO Repair open in the wire between the PGM'Fl
main relay 1 and the PGM-Fl main relay 2.t
3.
5. N4easure voltage between PGM-Fl main relay 2 5P
connector terminal No. 1 and body ground.
PGM.FI MAIN RELAY 25P CONNECTOR
Wire side oJ female terminals
ls there battery voltage?
YES Go to step 6.
NO Repair open in the wire between the under-
dash fuse/relay box and PGM-Fl main relay 2.1
6. Turn the ignition switch OFF.
7. Disconnect ECM connector E (31P).
8. Check for continuity between PGM-FI mainrelay2
5P connector terminal No. 3 and ECM connector
terminal E1.
PGM-FI MAIN RELAY 2 5P CONNECTOB
Wire side of female terminals
ls there continuity?
YES-Go to step 9.
NO-Repair open in the wire between the PGM Fl
main relay 2 and the ECM (E1).1
IMOFPR(GBN/YEL)
(cont'd)
11-141
Et2lFtxm
7-
z
ECM CONNECTOR E 131P}

FuelSupply System
(
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L
10.
1'].
Fuel Pump Circuit Troubleshooting (cont'dl
Reinstallthe PGM-Fl main relay 2.
Turn the ignition switch ON (ll).
Measure voltage between ECI\4/PCM connector
terminal E1 and body ground.
ECM CONNECTOB E {31P)
ls there battety voltage?
YES Go to step 12.
NO-Replace the PGM-Fl main relay 2.1
Turn the ignition switch OFF.
Reconnecl ECM connector E (31P).
Turn the ignition switch ON (ll), and measure
voltage between ECM connector terminal E1 and
body ground within the first 2 seconds after the
ignition switch was turned ON (ll).
ECM CONNECTOR E (31PI
13.
14.
Wire side of female terminals
Wire side of female terminals
11-142
t5.
to.
11.
18.
ls there battery voltage?
YES U pdate the ECM if it does not have the latest
so{1ware, or substitute a known-good ECM. then
recheck (see page 1 1-6). lf the symptom/indication
goes away with a known-good ECM, replace the
original ECM.I
NO Go to step 15.
Turn the ignition switch OFF.
Remove the rear seat cushion (see page 20-80).
Remove the access panel from the floor.
Measure voltage between fuel pump 5P connector
terminal No. 5 and body ground within the first 2
seconds after the ignition switch was turned ON (ll).
FUEL PUMP 5P CONNECTOR
wire side oI female terminals
ls there battery voltage?
YES Go to step 24.
NO-Go to step 19.
Turn the ignition switch OFF.
Remove the PGM-Fl main relay 2.
19.
20.

21. Connect PGM-Fl main relay 2 5P connector
terminals No. 1 and No. 2 with a iumDer wire.
PGM.FI MAIN RELAY 25P CONNECTOR
FUELPUMP(YEL/GRN)JUMPERWIRE
22.
23.
Wire side of {emale terminals
Turn the ignition switch ON (ll).
Measure voltage between fuel pump 5P connector
terminal No. 5 and body ground.
FUEL PUMP 5P CONNECTOR
Wire side ol female terminals
ls there battery voltage?
YES Replacethe PGM-Fl main relay2.t
NO-Repair open in the wire between the PGM-Fl
main relay 2 and the fuel pump 5P connector.l
Turn the ignition switch OFF.24.
FNI E
tri dffircr fv{YEL/BLK)
A
25. Check for continuity between fuel pump 5P
connector terminal No. 4 and body ground.
FUEL PUMP 5P CONNECTOR
Wire side of female terminals
ls there continuity?
YES Replace the fuel pump.l
NO-Repair open in the wire between the fuel
pump 5P connector and G551.1
11-143

Fuel Pressure Test
Special Tools Required. Fuel pressure gauge 07406-0040004. Fuel pressure gauge sel 07ZAJ-S5A0100
1. Relieve the fuel pressure (see page 1'1-144).
2. Disconnect the quick-connect fitting (A). Aftach the
fuel pressure gauge set and fuel pressure gauge.
Start the engine and let it idle.
. lf the engine starts, goto step 5.. lf the engine does not start, goto step 4.
Check to see if the fuel pump is running: listen to
the fuel fill port with the fuel fill cap removed. The
fuel pump should run for 2 seconds when the
ignition switch is first turned on.
. lf the pump runs, go to step 5.. lf the pump does not run, do the fuel pump circuit
troubleshooting (see page 1 1-1 41 ).
Read the pressure gauge. The pressure should be
320-370 kpa (3.3-3.8 kgf/cm', a7-52 psi)
. lf the pressure is OK, the test is complete.. lf the pressure is out of specification, replace the
fuel pressure regulator and the fuel filter (see
page 11-152), then recheck the fuel pressure.
5.
11-145