Honda Civic Service Manual page 299

PGM-FI System
I
a
DTC Troubleshooting (cont'dl
DTC Pl297: ELD Circuit Low Voltage
1 . R e s e t t h e E C M { s e e p a g e 1 1 - 4 ) .
2. Start the engine.
3 . T u r n o n t h e h e a d l i g h t s .
ls DTC P1297 indicated?
YES Go to step 4.
NO Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
t h e E L D a n d a t t h e E C M . I
4. Turn the ignition switch and the headlights OFF.
5. Disconnectthe ELD 3P connector.
6. Turn the ignition switch ON {ll).
7. Measure voltage between body ground and ELD 3P
connector terminal No. 3.
ELO 3P CONNECTOB
{GRN/REDI
Wire side of female terminals
ls there about 5 V?
YES Replace the ELD. t
N O - G o t o s t e p 8 .
Z 3
ELD
11-92
8. Turn the ignition switch OFF.
9. Disconnect ECM connector E {31P).
10. Check for continuity between body ground and
E C M c o n n e c t o r t e r m i n a l E 1 5 .
ECM CONNECTOR E 131PI
I l 2 l 3
4 5 6 1 7 8 I
t o
t d
/ 120
21
, 2 2 a l 2 /
tA
31
ELD
(GRN/RED}
7\'
Wire side of female terminals
ls there continuity?
YES-Repair short in the wire between the ECM
( E 1 5 ) a n d t h e E L D . r
NO- U pdate 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
o r i g i n a l E C M . I