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PGM-FI System
Misfire Detected in One Cylinder (cont'd)
Troubleshooting Aowchart
-
The MIL has been reported on.
OTe P0301.
P0302,
P0303.
or
P0304
is
indicated,
Check the fuel injector function:
Start
the engine. and
listen for
a
clicking sound at
the fuel injector
in
the problem cylinder.
Does
it
click?
YES
Problem
verification:
1.
After checking
the freeze
data,
do the
ECM/
PCM Reset Pro-
cedure.
2.
Exchange the
spark
plug from
the
problem cylinder with
one
of another
cylinder.
3. Connect
the
SCS
service
con-
nector.
4. Test-drive the
vehicle several
times in the range
of
the freeze
data.
(To
page '1
·
129)
11-128
NO
Check for an open or
short
in the
harness between the ECM/PCM
and the fuel
injector.
NOTE:
Are the wires OK?
YES
Replace the fuel injector.
Sub.titute a known-good
ECM/PCM and recheck. If
symptom/indication goes
away
,
replace the original
ECM/PCM.
• If there
is
no freeze
data
of
misfiring,
just
clear the
DTC.
• If there is no freeze data of misfiring,
test
drives under
various
conditions
are
necessary.
NO
The illustration shows
'97 - 98
models,
'99
-
00 models
are
similar.
Repair open or short in the wlr •.
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Troubleshooting
