Coil Packs not getting voltage?

Hi,

Are you getting power to the ignition failure sensor? Power from the ignition fuse in the under-hood junction box to the failure sensor. From there it is sent to each coil via a tan wire with a black tracer. For the circuit to be completed and fire the coil, the PCM needs to provide a ground path via coil 1 white wire and coil 2 orange wire.

So, if you do have power to the coils but they won't fire, either we have an issue with the PCM or the crankshaft position sensor. Keep in mind, the CKP may or may not set a code if it fails. If you have a live data scan tool, check to see if there is an RPM signal when cranking the engine. If you don't have one, see if the tachometer moves at all when cranking.

Let me know what you find.

Take care and Merry Christmas,

Joe

See pics below.

There is no power to either coil pack, when i had someone try to start it there no pulse current at the 3 wire pigtail,all fuses are good and there is power to the failure sensor,i have power at the fuel pump, even removed the a/c panel on the dash to check the ECU relay which i can feel clicking on and off, shouldn't there be a live 12v at the coil pack connector with the key on or is it just when starting the test light lights up, I've never ran into this problem before, Hope you have a nice Christmas and if you can think of anything else I'll check back!!

Hi,

Power to the coils should be present with the key on (engine off or on) and in the start position.

Go to the ignition failure sensor. Disconnect the connector and check pin 4 for power and pin 1 for continuity. If you have both, replace the sensor. I believe you replaced it already, but you may have gotten a bad one. If you have power and ground to the sensor, you should see power at the coils unless there is an open circuit between the sensor and coils.

Let me know what you find.

Joe

Not sure if you got my last reply,i have 12v to the failure sensor pin 4,pin 1 is in the image i sent,all fuses that lead to the ignition are all working,cranked the engine,no tach reading but still no power at the coils, I'll keep checking back with you to see if can figure something else out, meanwhile I'll keep trying to see on my end, thanks!!!

Hi,

Looking at your second pic, if you got 12v and used the ground in the connector, you confirmed both are good.

So, connect the sensor and back probe pin 3 (tan/black wire) out of the sensor connector for power. If there isn't any power out, the sensor is bad. If there is and nothing at the coils, then you have an open between the sensor and coils.

Let me know what you find.

Joe

If I'm looking at the plug for failure sensor 3rd wire is just a skinny tan wire, the second one is a + also but power coming from the one next to the 12v which is the top wire, if it's the sensor being a defect I'm going to be really upset with AutoZone but wouldn't be the 1st time, so no power out definitely has to be the sensor??

Meant to say that the second wire which is +v has no power coming out when I back probed it, the 3rd wire is just a skinny tan wire with nothing either, so if I'm not getting anything from back probing it it's definitely the sensor??

According to the manual, that is correct. Let me know if a new one eliminates the issue. However, also make sure the connector is in good condition and nothing is damaged.

The tan/black wire is what sends power to the coils. Make sure the key is on when testing.

Take care,

Joe