IGNITION COIL INSPECTION [13B-MSP]

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Ignition Coil Inspection (Spark Test)

1.  Perform the spark test and identify the malfunctioning cylinder. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].)

2.  Replace the ignition coil of the malfunctioning cylinder with that of a normal cylinder, and reperform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].)

•  If the spark is not normal due to a malfunctioning ignition coil, replace that ignition coil.

•  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 Inspection

1.  Warm up the engine.

2.  Connect the timing light to the high-tension lead.

3.  Verify that the timing light flashes at a certain interval on all high-tension leads while idling and racing the engine.

•  If the timing light does not flash at a certain interval, inspect the following:

(1)  Replace the high-tension lead and spark plug for which the timing light flashes at a certain interval.

(2)  Verify that the timing light flashes at a certain interval while idling and racing the engine.

•  If the timing light does not flash at a certain interval even if the high-tension lead and spark plug are replaced, replace the ignition coil. (See IGNITION COIL REMOVAL/INSTALLATION [13B-MSP].)

•  If the high-tension lead and spark plug are replaced and the timing light flashes at a certain interval, a high-tension lead or spark plug malfunction can be considered possible causes. (See HIGH-TENSION LEAD INSPECTION [13B-MSP].) (See SPARK PLUG INSPECTION [13B-MSP].)