Mitsubishi MOTORS 3000GT Bedienungsanleitung Seite 481

OPERATION
Turn ignition switch to ."ON"position, and battery
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voltage will be applied to primary winding of
ignition coil.
When crankshaft position sensor and camshaft
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position sensor signal is input to engine control
module, engine control module makes ON-OFF
control of power transistors one by one.
When power transistor is turned on, current
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flows from ignition coil (primary winding) to
ground through power transistor.
When power transistor A is turned from ON
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to OFF, the spark plugs of No. 1 and No. 4
cylinders spark. Turning of power transistor B
from ON to OFF will produce sparking in spark
plugs of No. 2 and No. 5 cylinders. Furthermore,
when power transistor C is turned from ON to
OFF, sparking is produced in spark plugs of
No. 3 and No. 6 cylinders.
ENGINE ELECTRICAL - Ignition System
TSB Revision
TROUBLESHOOTING HINTS
1. Engine cranks, but does not start.
(1) Spark is insufficient or does not occur at
all (on spark plug).
Check ignition coil.
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Check camshaft position sensor and
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crankshaft position sensor
Check power transistor.
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Check spark plugs.
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Check spark plug cable.
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(2) Spark is good.
Check ignition timing.
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2. Engine idles roughly or stalls.
Check spark plugs.
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Check ignition timing.
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Check ignition coil.
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Check spark plug cable.
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3. Poor acceleration
Check ignition timing.
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Check spark plug cable.
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Check ignition coil.
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