Fuel Pump Circuit Troubleshooting - Honda Civic 2002-2003 Service Manual

• Fuel Pump Circuit Troubleshooting
•
•
If 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. If
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).
-~-----~ -
--
3. Turn the ignition switch ON (II).
4. Measure voltage between PGM-FI main relay 2 5P
connector terminal No.5 and body ground.
IGP1
IYEL/BLKI
=
PGM-FI MAIN RELAY 2
5P CONNECTOR
Wire side of female terminals
Is there battery voltage?
YES-Go to step 5.
NO-Repair open in the wire between the PGM-FI
main relay 1 and the PGM-FI main relay 2 .•
5. Measure voltage between PGM-FI main relay 2 5P
connector terminal No.1 and body ground.
PGM-FI MAIN RELAY 2
5P CONNECTOR
IG1
IYELI
BLKI
=
Wire side of female terminals
Is there battery voltage?
YES-Go to step 6.
NO-Repair open in the wire between the under-
dash fuse/relay box and PGM-FI main relay 2 .•
6. Turn the ignition switch OFF.
7. Disconnect ECM connector E (31P).
8. Check for continuity between PGM-FI main relay 2
5P connector terminal NO.3 and ECM connector
terminal El.
PGM-FI MAIN RELAY 2 5P CONNECTOR
1
IMOFPR
IGRNI
YELl
Wire side of
female terminals
IMOFPR
IGRNI
YELl
.Q
ECM CONNECTOR E 131 PI
2 3 4 5 6 7 89
141516 18 2021
222324 26 27 293031
Wire side of female terminals
Is there continuity?
YES-Go to step 9.
NO-Repair open in the wire between the PGM-FI
main relay 2 and the ECM (El)..
(cont'd)
11-141