2009 CR-V, power to the coils? From the key switch or from the ECU or what ever computer is responsible?

 

Ignition coil control (+) is from the PCM.

 

Thank you. Do the coils get the pulse from that + signal or is that just supply power? And the ground for the coils is pulsed, like most manufactures do? If so that explains a lot.
I'm waiting for manuals I ordered.

 

Yes that signal is to energize the coils.

Power comes from the coil relay and ground is G101.

It is incorrect to assume most manufactures pulse ground. It really depends on the coil design. There are 2,3,4 and 5 wire coils.

 

So then to complete the circuit there is a wire from each coil that is grounded? I will have to wait for the books I ordered. So it is a positive pulse that fires to coils then? Relay ? The ecu will send the pulse.

 

Yes each coil is chassis grounded.

Click the link in my sig for access to wiring diagrams online(they are not free, but cost is minimal))

 

On the 2009 CR-V, each coil has three wires on the connector. Within each coil there is an Ignition Control Module (ICM) inside the coil itself.

• Power (coming from a separate relay in the under-hood fuse/relay box, controlled by the Powertrain Control Module (PCM); the PCM sends a ground to this relay coil, which energizes the relay coil so the relay contact closes to allow fused power through the relay to the 4 separate ignition coils)
• Ground (from chassis ground)
• Triggering Signal to the ICM (pulses from PCM)

 

Then how to put in a kill switch? Is there one power wire that feeds all coils?

 

A kill switch can be installed either in the yellow wire from the ignition coil relay to the C101 connector B side Term B23, or on the A side term A16 BLK/WHT wire, this is the circuit that is switched by the ignition coil relay. In a runaway condition there is no other positive way to turn off the ignition, it is under PCM authority.