IGNITION COIL INSPECTION [ZJ, ZY]

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1.  Perform the spark test and identify the malfunctioning cylinder. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [WITH WU-TWC].)(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [WITHOUT WU-TWC].)

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 [WITH WU-TWC].)(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [WITHOUT WU-TWC].)

•  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.