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James
James, Ford Technician
Category: Ford
Satisfied Customers: 3628
Experience:  Ford Senior Master Tech, Ford gas and diesel expert, ASE Certified
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1999 f250 dies the instant i plug in my scanner

Customer Question

1999 f250 dies the instant i plug in my scanner
Submitted: 1 year ago.
Category: Ford
Expert:  James replied 1 year ago.

Usually when this happens it is due to an aftermarket programmer inside the PCM.

Customer: replied 1 year ago.

so what are options.. i need to scan it again because im gettling a glitch in the tranny all of a sudden it doesnt wanna shift out of second

Expert:  James replied 1 year ago.

When it won't shift out of second does the overdrive light flash?

Customer: replied 1 year ago.

yes

Expert:  James replied 1 year ago.

So it is detecting a transmission fault. If you plug the scan tool into the vehicle and then start it will it continue to run?

Customer: replied 1 year ago.

no

if i plug the scan tool in it will not start and if i start it first and then plug the scanner in it dies. and it wont read with the engine off key on. it just says it cannot communicate with the vehicle

Expert:  James replied 1 year ago.

If you go into the back of the PCM is there a chip installed?

Customer: replied 1 year ago.

no

Expert:  James replied 1 year ago.

Do you have a backup scan tool to see if the same issue occurs?

Customer: replied 1 year ago.

i will have in the morning. i'll let ya know what happens

Expert:  James replied 1 year ago.

Sounds good

Customer: replied 1 year ago.

just close this thread. i couldnt wait anymore. took it to a dealer

Expert:  James replied 1 year ago.

Do you have a wire diagram by chance to pin out the data link connector in case there is a short.

Customer: replied 1 year ago.
Sorry but I couldn't wait anymore I ended up taking it to the dealer I had responded this morning
Expert:  James replied 1 year ago.

I'm aware of that but I have a full time job as well. I am unable to be on here all of the time.

Customer: replied 1 year ago.

i understand completely. i wasnt blaming you. i just wanted you to know

Expert:  James replied 1 year ago.

I understand. If I can help with anything else please just let me know.