CLASS RACER FORUM - View Single Post - Testing coils on a coil over plug system?

Mark Ruset · 09-12-2011, 08:05 PM

Art what kind of car are you working on? I copied part of a page from a GM service manual, not sure if this will help.
This ignition system uses individual ignition module/coil assemblies for each cylinder. The engine control module (ECM) controls the spark events by transmitting the timing pulses on the ignition control (IC) circuits to the individual ignition module/coil assemblies in firing order sequence. Each ignition module/coil has the following circuits:

•

An ignition 1 voltage circuit

•

A ground circuit

•

An IC circuit

•

A low reference circuit

09-12-2011, 08:05 PM	#10
Mark Ruset Member Join Date: May 2006 Location: Southwest Florida Posts: 263 Likes: 35 Liked 43 Times in 29 Posts	Re: Testing coils on a coil over plug system? Art what kind of car are you working on? I copied part of a page from a GM service manual, not sure if this will help. This ignition system uses individual ignition module/coil assemblies for each cylinder. The engine control module (ECM) controls the spark events by transmitting the timing pulses on the ignition control (IC) circuits to the individual ignition module/coil assemblies in firing order sequence. Each ignition module/coil has the following circuits: • An ignition 1 voltage circuit • A ground circuit • An IC circuit • A low reference circuit __________________ Mark Ruset 2048 STK