I installed a new CPS sensor yesterday. Good battery, engine cranks over very good, but no start.
Getting a 5volt reading at the coil 2 wire plug in, but no spark from the spark plug wires, or the wire, coil to center of distributor cap. Should there be 12 volt at the coil plug in?
thanks,

 

2/3 way down:
https://www.cherokeeforum.com/f2/ignition-coil-testing-148594/

 

What scale did you have your voltmeter set to when you took the reading at pin 2? 5 Volts seems high.

Connector pin 1 is power in to the coil. 12 Volts comes from the ASD relay, through fuse 21 in the PDC, to pin 1 when the ASD relay is activated (engine turning). Connector pin 2 is the coil driver (ground circuit) from the PCM. The PCM will make and break the ground circuit based on signals from the CPS.

 

Thanks for the replys/info guys. This is concerning my 97 XJ.

I put my voltmeter on the battery terminals to see is if the meter is set
at 12 volt. Meter ok.

I used an extra spark wire with a spark plug attached to check if coil firing, which it did not.

Checking the coil connection pins.
When I first turn the key on, the meter goes up for a second near 12 volt, and then down, and when cranking the engine, the meter has a lower reading, this is when the meter is connect to the pin.

I pulled the coil off, and later will install it on my running 98 XJ, see if the coil is bad...

thanks very much..

 

This morning I put the coil from the non running 97 onto
the 98. The 98 ran fine.
I put the 98 coil on the 97, still no fire from the coil.
Getting 12volt at the #1 pin/dark green wire now.
No reading on the #2 pin/olive colored wire.