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1.Make sure the diagnosis codes are not stored using M.U.T.-III. If stored, record the
code No. Carry out the troubleshooting for the stored codes and solve the problems even if not
related to the ignition.
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2.Disconnect the injector connectors on all of the cylinders.
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3.Disconnect the ignition coil connector.
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4.Remove the ignition coil and install a good spark plug to the ignition coil.
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5.Connect the ignition coil connector.
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6.Earth the side electrode of the spark plug and crank the engine.
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7.Check that spark is produced between the electrodes of the spark plug.
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8.If the spark plug has weak sparks or no sparks, carry out the same check using a good ignition
coil. If there are strong sparks on this check with a good ignition coil, it becomes clear there
is a problem with the ignition coil. Replace the ignition coil with a new one. If there are
no sparks on this check with a new ignition coil, there is probably a problem with the ignition
circuit. Check the ignition circuit.
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9.Using M.U.T.-III, make sure whether the diagnosis codes are stored due to the check,
or not. Except the codes stored in Step 1, clear the codes all together if they are present.
And then, carry out the troubleshooting about the codes recorded.
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