Honda Civic Service Manual page 438

PGM-FI System
Misfire in Detected One Gylinder (cont'dl
Troubleshootin g Flowchart
NOTE:
. lf there is no treeze data of misfiring,
just clear the DTC.
. It there is no freeze data of misfiring,
t e s t d r i v e s u n d e r v a r i o u s c o n d i t i o n s
-
The MIL has been reoorted on.
-
DTC P0301. P0302. P0303, or
P030il is indicated.
Check the fuel iniecto. lunction:
Stan the engine, and listen for a
clicking sound at the fuel injector
in the problem cylinder.
Check for an open or short in the
harness between ECM/PCM and
the fuel iniector.
Repair open or short in the wir€.
Replace the fuel iniector.
S u b 3 t i t u t e a k n o w n - g o o d
E C M / P C M a n d r e c h e c k . I t
s y m p t o m / i n d i c a t i o n g o e s
away, replace the original ECM/
PCM.
Problem verification:
1. After checking and recording
the freeze data, do the ECM/
PCM Reset Procedure.
2. Exchange the spark plug from
the problem cylinder with one
from another cylinder,
3. Connect the SCS service con'
nector,
4. Test-drive the vehicle several
times in the range ofthe free2e
data.
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