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Code scanner will not communicate with PCM

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Old May 15, 2016 | 09:11 PM
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Code scanner will not communicate with PCM

I'm at a loss can anybody help first of all the there was no power getting to the fuel pump on my 2002 Ford F250 73 diesel traced it back to the inertia switch no power in or out but I'm getting power at the fuel pump relay put the code scanner to the PCM and no communication can anyone help any advice would be greatly appreciated thank you
 
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Old May 15, 2016 | 09:14 PM
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Originally Posted by Dave37113
I'm at a loss can anybody help first of all the there was no power getting to the fuel pump on my 2002 Ford F250 73 diesel traced it back to the inertia switch no power in or out but I'm getting power at the fuel pump relay put the code scanner to the PCM and no communication can anyone help any advice would be greatly appreciated thank you
I won't be able to help you but I can tell you that you will need to provide what it is you are trying to read the codes with and any history that you have with that reader's abilities.
 
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Old May 15, 2016 | 09:16 PM
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Originally Posted by Walleye Hunter
I won't be able to help you but I can tell you that you will need to provide what it is you are trying to read the codes with and any history that you have with that reader's abilities.
it's a brand new scanner I rented one from AutoZone that one wouldn't work so I went and bought one and it's a Innova 3020b
 
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Old May 15, 2016 | 10:49 PM
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What you will find is that not all scanners work on these trucks, they are not true OBD II compliant. Some will with limited usability.

There are however several options, some of which very low cost, that are available to you. Search the forum for torque pro, forscan and auto enginuity. I would provide links, but it's hard to do off my cell. These will pretty much cover what you want to accomplish, the first two being the cheaper options available.
 
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Old May 15, 2016 | 11:20 PM
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When you say it doesn't work, does the unit power up when you plug it in?

Stewart
 
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Old May 15, 2016 | 11:34 PM
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Originally Posted by Stewart_H
When you say it doesn't work, does the unit power up when you plug it in?

Stewart
yes it does power up and then it says reading and then it says communication error
 
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Old May 15, 2016 | 11:41 PM
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Does the truck run? Another fella on here is suspecting a fried PCM as the truck won't start and he can't communicate with a reader. Fuel pump won't run either. He shorted something out to cause all of this though.
 
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Old May 15, 2016 | 11:45 PM
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Do you have power at the cigarette lighter? It shares the same fuse as the diagnosis port for the code reader, if that fuse has blown the code reader will not work.
 
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Old May 16, 2016 | 12:12 AM
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Originally Posted by Otto396
Does the truck run? Another fella on here is suspecting a fried PCM as the truck won't start and he can't communicate with a reader. Fuel pump won't run either. He shorted something out to cause all of this though.
No the truck does not run when I jump the fuel pump it will not start cranks over but will not start
 
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Old May 16, 2016 | 12:14 AM
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Originally Posted by twigsV10
Do you have power at the cigarette lighter? It shares the same fuse as the diagnosis port for the code reader, if that fuse has blown the code reader will not work.
Yes there is power to the cigarette lighter when I jump the fuel pump it will crank but will not start up all fuses are good everything seems to be working fine the only thing that I can see is the wait to start light will not go off I was sitting in a parking lot idling waiting for my wife to come out and the truck just died acted like the fuel pump went out replace the fuel pump realize there was no power to the fuel pump so now I've got two good working fuel pumps
 
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