Honda Civic Service Manual page 281

PGM-FI System
a
DTC Troubleshooting (cont'dl
26. Check for continuity between body ground and
ECM connector terminal (see table).
ECM CONNECTOR A {31PI
PROB LE IVI
CYLINDER
DTC
E C M
T E R M I N A L
W I R E
C O L O R
N o . 1
P0301 430 Y E U G R N
N o . 2
P0302 A.29 B L U / R E D
N o . 3
P0303 428 WHT/BLU
N o , 4
P0304 421 BRN
ls there continuity?
YES Repair shon in the wire between the EClvl
a n d t h e i g n i t i o n c o i l . l
NO-Go to step 27.
2 7 . C o n n e c t i g n i t i o n c o i l 3 P c o n n e c t o r t e r m i n a l N o . 1 t o
body ground with a jumper wire (see table).
IGNITION COII 3PCONNECTOR
W i r e s d e o f f e m a l e t e r m i n a l s
P R O B L E M
CYLINDER
DTC WIRE COLOR
N o . 1
P0301
YEUGR N
N o . 2
P0302 BLU/RED
N o . 3
P0303 WHT/BLU
N o . 4
P0304
B R N
11-74
28. Check for continuity between body ground and
ECM connector terminal (see table).
ECM CONNECTOR A {31P}
P R O B L E M
CYLINDER
DTC E C M
TERI\4INAL
W I R E
COLOR
N o . 1
P0301 A30 YEL/GRN
N o . 2
P0302
429
BLU/RED
N o . 3
P0303 A.28 WHT/BLU
N o . 4
P0304
A.21
BRN
ls there continuity?
YES-Go to step 29.
NO Repair open in the wire between the ECM and
t h e i g n i t i o n c o i l . l
29. Check the engine compression
ls the compression OK?
YES-Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-6). lf the symptom/indication
goes away with a known-good ECM, replace the
o r i g i n a l E C I \ 4 . I
N O - R e p a i r t h e e n g i n e . l
Disconnect ECM connector B (24P).
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 ) .
3 0 .