No crank no start

Tiny
VMAN187
  • MEMBER
  • 2005 FORD EXPEDITION
  • 5.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 169,000 MILES
When I turn the key all the lights and everything come on but it does absolutely nothing; no crank no start. I replaced the starter with a brand new one then it did the same thing. I hooked it up to the computer and it said the PCM was bad. So I got a new one hooked it up had the keys and fobs reprogrammed to the new PCM and still when you turn the key nothing happens. I'm lost, I have no idea what else it could be. Does anyone have any ideas?
Thursday, January 24th, 2019 AT 4:19 PM

5 Replies

Tiny
MPNANTO
  • MECHANIC
  • 17 POSTS
Hi Vman,

Welcome to 2 Car Pros,

Can you elaborate on the PCM being bad a little more? What did the computer say specifically when you connected it?

Can you verify that the check engine light comes on when you turn the key on? And when you try to crank it does it go out?
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Saturday, January 26th, 2019 AT 12:02 AM
Tiny
VMAN187
  • MEMBER
  • 3 POSTS
Hey MPNANTO,
I'm not exactly sure what the computer said Because my mechanic was doing the test and just telling me I know he said that there was no communication with the pcm and the faults kept saying powertrain control module and he tried to reset it and it just kept popping up. The check engine light does come on when I put the key in but all the lights come on and when I turn the key all the way everything shuts off and nothing happens at all. When I had the keys reprogrammed to the new pcm the computer was communicating with the new pcm just fine and everything looked good there was no faults at all and the same thing happened when you turn the key all the lights come on but when you turn the key all the way everything shuts off and nothing happens
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Saturday, January 26th, 2019 AT 11:44 AM
Tiny
BMDOUBLE
  • MECHANIC
  • 1,139 POSTS
Sounds like a possible high speed CAN network issue disabling the PCM amongst other modules on this network. To even begin helping with diagnosis on this we would need the code numbers and the modules that they came out of.
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Saturday, January 26th, 2019 AT 10:00 PM
Tiny
VMAN187
  • MEMBER
  • 3 POSTS
How would I get the code numbers? I'm lost I have no idea what else it could be. Someone told me it could be the fuse box but I don't think it's that. When I turn the key I can hear a click by the wires behind the glove box by the fuse box but I don't know I know a little bit about working on cars but not much about electrical.
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Saturday, January 26th, 2019 AT 10:09 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Hello,

If you can you please shoot a quick video with your phone so we can see what's going on, that would be great. You can upload it here with your response. This video shows how to scan the can for issues.

https://youtu.be/InIlnsjOVFA

Have you checked fuse #41 for power in the central junction box behind the kick panel?

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

If there is no power the computer wont communicate. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Tuesday, January 29th, 2019 AT 12:54 PM

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