Honda Civic Service Manual page 507

I
PGM-FlMain Relay
Description
T h e P G M - F l m a i n r e l a v a c t u a l l v c o n t a i n s t w o i n d i v i d u a l
relays. This relay is located at the right side of the cowl.
One relay is energized whenever the ignition is on which
supplies the battery voltage to the ECM/PCM, power to
the luel iniectors, and power for the second relay. The
second relay is energized lor two seconds when the igni-
t i o n i s s w i t c h e d O N ( l l l , a n d w h e n t h e e n g i n e i s r u n n i n g ,
to supply power to the luel pump.
PGM-FI
MAIN RELAY
J
I
t
FUEL PUMP
Relay Testing
NOTE:
.
It the engine starts and continues lo run. the PGM Fl
m a i n r e l a y i s O K .
. U s e t h e t e r m i n a l n u m b e r s b e l o w ;
ignore the terminal numbers molded into the relay,
1 . R e m o v e t h e P G M F l m a i n r e l a y .
2. Attach the battery positive terminal to the No. 2 ter-
minal and the battery negative terminal to the No 1
terminal of the PGM-Fl main relay. Then check for
c o n t i n u i t y b e t w e e n t h e N o . 5 t e r m i n a l a n d N o 4 t e r -
m i n a l o f t h e P G M F l m a i n r e l a y .
. lf there is continuity, go on to step 3.
. l f t h e r e i s n o c o n t i n u i t y , r e p l a c e t h e P G M - F l m a i n
relay and retest.
N o . 3
No. 1
To lGN. 1
To GROUND
To ST. SWITCH
To ECM/PCM {A161
To 8AT O
To ECM/PCM
{(a11, A241, (81. B9l*l
To FUEL PUMP
.r '99 model
3 . Altach the batterv positive terminal to the No.5 ter-
minal and the battery negative terminal to the No. 3
terminal of the PGM-Fl main relay. Then check that
there is continuity between the No. 7 terminal and
No. 6 terminal of the PGM-Fl main relay.
. lf there is continuity, go on to step 4
. l f t h e r e i s n o c o n t i n u i t y , r e p l a c e t h e P G M - F l
m a i n
relay and retest.
Attach the battery positive terminal to the No. 6 ter-
minal and the battery negative terminal to the No. 1
terminal of the PGM Fl main relay. Then check that
there is continuity between the No. 5 terminal and
No. 4 terminal of the PGM-Fi main relay.
.
lf there is continuity, the PGM-Fl main relay is OK.
lf the fuel pump still does not work, go to Harness
Testing on the next page.
. lf there is no continuity, replace the PGM Fl main
4 .
(cont'd)
11-237
relay and retest.