Vehicle just stopped would not start, cranks over fine?

1999 JEEP WRANGLER TJ
82,000 MILES • 4.0L • 4WD • AUTOMATIC
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WILLE16
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Replace crankshaft sensor. It started idle rough. I started checking connections unplugged connections on ECM and cleaned but not seeing that I bent one of the pins and plugged it back in trued starting it wouldn’t start shut down relay was buzzing.

I unplugged the black plug from ECM and found broken pin was shorting across other pins. I got a replacement ECM now it will not start; it cranks over just fine also replaced camshaft sensor. Still no start.

Checked for power to ECM that’s okay checked grounds at ECM ok check for the 5 bolts from ECM it’s okay. Something I should have said at first was when it first stopped there were some codes about a bad fuse but couldn’t find any blow ones. Checking other things unhooked battery when I hooked it back up there are no codes showing even after cranking engine a whole lot and there is no RPM showing when cranking the check engine light will come on after cranking engine for a few seconds.
This vehicle in in great shape all the wiring is good only thing this vehicle set in a damp basement for a few years, and I had trouble with the turn signal took the turn signal switch apart and it was all corroded I cleaned It up put it back together and it has worked find. Also, there is no spark there is fuel.

That’s all I can think of now.
Thanks for any help you can provide.
Oct 8, 2023 at 7:59 AM
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STRAILER
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When you checked for spark did you remove the coil wire to check, or the spark plug wire? I have seen the ignition rotor short out and not allow the spark to be generated from the ignition distributor. I would check for power on the positive side of the coil (key on) as well.

These two guides can help us get started on fixing the problem:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

And this video can help you check for spark from the ignition coil:

https://youtu.be/baq_aEWNQ0Y?si=xLrMHNn0bUVyF7rQ

Please go over these guides and get back to us.
Oct 9, 2023 at 9:08 AM
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WILLE16
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Sorry for the long wait but life happens. And thanks for the advice. Okay, checked for spark from coil. no spark to plug or to rotor cap.
Oct 16, 2023 at 12:35 PM
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STRAILER
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Good job, most of the time what happens is the crankshaft angle sensor goes out, here is the location so you can check it out. Also, please check all fuses with the system on, this guide can help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Please let us know what happens.
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Oct 17, 2023 at 9:26 AM
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WILLE16
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I replaced the crankshaft sensor, and it will still not start. Thought that maybe the new one was bad so I replaced it and still will not start.
Also replaced camshaft sensor still not start but still cranks fine. Checked fuses didn’t find any bad ones.
Oct 17, 2023 at 9:53 AM
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STRAILER
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Still no spark, correct? Let's check the fuses I have featured below for power; this guide can help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the fuses are okay let's swap out the auto shutdown relay.
Check out the images (below). Please let us know what happens.
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Oct 19, 2023 at 10:37 AM
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WILLE16
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Check fuses tried switching out relays still no start.
Oct 20, 2023 at 5:38 AM
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JACOBANDNICKOLAS
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Hi,

I noticed it has been a couple of days since we made contact with you. Have you been able to make any progress? I'm interested in knowing.

Joe
Oct 22, 2023 at 9:15 PM
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WILLE16
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No still the same.
Oct 23, 2023 at 5:55 AM
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STRAILER
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Does the ignition system have spark? Please check out this guide:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Please go over this guide and get back to us.
Oct 23, 2023 at 12:31 PM
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WILLE16
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Check for spark. There aren’t any. Check coil there were some cracks in housing, so I replaced the coil and still no spark.
So far, I have replaced the crankshaft sensor with the camshaft sensor and now the coil and yes ECM. And still cranks fine but no spark.
The fuel pump is working. But there are no codes showing and when cranking the RPM does not move.
Oct 28, 2023 at 7:06 AM
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STRAILER
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Okay, can you turn the key on and while using a test light check the positive side of the coil for power?

Here is a guide to help:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Remove the connector and test terminal #1, if no power is present swap out the auto shutdown relay.

Check out the images (below). Please let us know how it goes.
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Oct 30, 2023 at 9:16 AM
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WILLE16
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No power.
Nov 4, 2023 at 5:22 AM
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STRAILER
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Okay, let's check for power at the fuse #18 in the under hood fuse panel, this guide will help, key on.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Please let us know what happens.
Nov 5, 2023 at 11:22 AM
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WILLE16
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I have checked all the fuses under the hood and behind the glove box all are good.
Nov 6, 2023 at 1:05 PM
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STRAILER
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Yes, but does it have power?
Nov 7, 2023 at 8:29 AM
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WILLE16
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Sorry about that. No.
Another thing I checked was for 60 ohms on the can bus.
I checked on the test port under driver’s side of the dashboard I have no reading on either high or low bus. Both grounds are working, and I have 12v but that is all.
Nov 8, 2023 at 11:39 AM
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STRAILER
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Okay, since you don't have power at #18 I would change out the auto shutdown relay. Which I mentioned above.
Nov 9, 2023 at 7:34 AM
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WILLE16
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Try that by switching it with other relays, still the same no power.
Nov 9, 2023 at 1:06 PM
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STRAILER
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When you turn the key on can you feel the ASD relay click? You may need a helper with this test.
Nov 10, 2023 at 9:28 AM
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WILLE16
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No there is no click.
Nov 12, 2023 at 8:12 AM
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STRAILER
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Please recheck fuse #19 and fuse #6 in the fuse panel under the hood. If the fuse is okay sway out the ASD relay. Let me know how it goes.
Nov 13, 2023 at 9:13 AM
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WILLE16
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Fuses are okay, swapped out relay, still the same crank no start.
Nov 15, 2023 at 3:23 AM
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STRAILER
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Okay, it sounds like the ignition switch is bad. here is a guide to help check for power and I have marked the wires you need to check for power when the ignition switch is in the "on" position:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the images (below). Let us know how it goes.
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Nov 16, 2023 at 10:06 AM
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WILLE16
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Check switch and power with switch on it's okay.
Dec 5, 2023 at 6:27 AM
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STRAILER
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If you don't have power to fuse #6 (please double check) then the PDC had gone bad. Here is the wiring diagram to show you what powers fuse #6. You might be able to piggyback power onto the red/white wire from the PDC to fix it as well, I would use an inline fuse. Check out the images (below). Let us know what you find.
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Dec 5, 2023 at 10:40 AM
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WILLE16
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Sorry about how long it took me to respond but my Jeep is outside, and the weather has been too wet and cold, so it makes it hard to get much checking done. I appreciate your help.
I will try to do what you have requested soon.
Jan 7, 2024 at 6:52 AM
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STRAILER
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Sounds good, stay warm.
Jan 7, 2024 at 10:17 AM