Ignition System: Testing and Inspection

Electronic Ignition (EI) System Diagnosis

Circuit Description

The ignition system uses individual ignition coil/module assemblies for each cylinder. The powertrain control module (PCM) controls the individual coils by transmitting timing pulses on the ignition control (IC) circuit of each ignition coil/module to enable a spark event. The PCM monitors each IC circuit for improper voltage levels. Each ignition coil/module has the following circuits:

* An ignition voltage circuit
* A ground
* An IC circuit

Test

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