Mazdaspeed3 L4-2.3L Turbo (2010)
Ignition Coil: Testing and Inspection
IGNITION COIL INSPECTION [L3 WITH TC]
Ignition Coil Inspection
1. Perform the spark test and identify the malfunctioning cylinder.
2. Replace the ignition coil of the malfunctioning cylinder with that of a normal cylinder, and reperform the spark test.
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If the spark is not normal due to a malfunctioning ignition coil, replace that ignition coil.
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It is unlikely that all four ignition coils fail to operate properly. To prevent replacing a normal component, perform the above procedure,
identify the malfunctioning ignition coil, and replace it.
Ignition Coil with Built-in Igniter Inspection
1. Remove the battery cover. See: Starting and Charging/Battery/Service and Repair/Removal and Replacement
2. Disconnect the negative battery cable.
3. Remove the charge air cooler. See: Engine, Cooling and Exhaust/Engine/Intake Manifold/Service and Repair
4. Disconnect the ignition coil connector.
5. Measure the resistance between each terminal on the ignition coil connector using an analog circuit tester.
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If the measurement corresponds to the table, replace the ignition coil.