Intermittent crank no start?

2007 JEEP GRAND CHEROKEE

270,000 MILES • 3.7L • 6 CYL • 4WD • AUTOMATIC

CORTE.EZ12

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When I turn the key sometimes the car starts up fine. Then sometimes I turn the key and it’s continuous cranking even if l let go of the key.

I’ll drive somewhere then park, I’ll go attend business come back try to start up again and then it starts just cranking.

Note: sometimes I have to keep turning the key off and on to get it to start up.

May 2, 2023 at 9:58 PM

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CAR REPAIR CONTRIBUTOR
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Yep, this happens when the IPM goes out but to be sure we should do a CAN scan to see what comes up, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is how to change the IPM out and I have included the starter wiring diagrams so you can see how the system works. It is easy to replace because it-self learns. Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

May 3, 2023 at 2:41 PM