Honda EP3 Service Manual page 371

FuelSupply System
(
(
L
1 0 .
1 ' ] .
Fuel Pump Circuit Troubleshooting (cont'dl
R e i n s t a l l t h e P G M - F l m a i n r e l a y 2 .
T u r n t h e i g n i t i o n s w i t c h O N ( l l ) .
Measure voltage between ECI\4/PCM connector
t e r m i n a l E 1 a n d b o d y g r o u n d .
ECM CONNECTOB E {31P)
ls there battety voltage?
YES Go to step 12.
N O - R e p l a c e t h e P G M - F l m a i n r e l a y 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
i g n i t i o n s w i t c h w a s t u r n e d O N ( l l ) .
ECM CONNECTOR E (31PI
1 3 .
1 4 .
Wire side of female terminals
Wire side of female terminals
11-142
t 5 .
t o .
1 1 .
1 8 .
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
o r i g i n a l E C M . 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.
N O - G o t o s t e p 1 9 .
Turn the ignition switch OFF.
R e m o v e t h e P G M - F l m a i n r e l a y 2 .
1 9 .
20.