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5 CHECK IGNITION SPARK
1. Disconnect ignition wire from spark plug.
2. Connect a known good spark plug to the ignition wire.
3. Place end of spark plug against a suitable ground and crank engine.
4. Check for spark.
SEF575Q
OK or NG
OK © GO TO 6.
NG © Check ignition coil, power transistor and their circuits. Refer to “IGNITION SIGNAL”,
EC-692.
6 CHECK SPARK PLUGS
Remove the spark plugs and check for fouling, etc.
SEF156I
OK or NG
OK © GO TO 7.
NG © Repair or replace spark plug(s) with standard type one(s). For spark plug type, refer to
MA-17, “Changing Spark Plugs”.
7 CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-13, “Measurement of Compression Pressure”.
Standard:
1,275 kPa (13.0 kg/cm
2
, 185 psi)/300 rpm
Minimum:
981 kPa (10.0 kg/cm
2
, 142 psi)/300 rpm
Difference between each cylinder:
98 kPa (1.0 kg/cm
2
, 14 psi)/300 rpm
OK or NG
OK © GO TO 8.
NG © Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO.1-6CYLINDER
MISFIRE
Diagnostic Procedure (Cont’d)
EC-320
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