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tkorpal
Active Member

25 Posts

Posted - 05/15/2019 :  12:37:35 PM  Show Profile  Reply with Quote
2011 IC CE with Maxxforce DT. Range Inhibited light will come on when trying to shift to reverse or drive this one does not have the safety you can shift without your foot on the brake. No codes in engine or transmission. I can get it to shift after cycling the key 2 or 3 times, once it would not correct until about 20-30 key cycles. Any help would be appreciated.

Bluenozer
Advanced Member

Canada
247 Posts

Posted - 05/16/2019 :  02:30:00 AM  Show Profile  Reply with Quote
I thought they all had the parameter of pressing brake before shift, and if it doesn't one of the speed sensors must be reading something it does not like

OEM trained in wiring and all engine platforms for 20 years
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tkorpal
Active Member

25 Posts

Posted - 05/16/2019 :  03:55:11 AM  Show Profile  Reply with Quote
The older ones did not have that safety yet. I think they started doing that around 2016. I checked the only external sensor i could find and it seems to be working.
quote:
Originally posted by Bluenozer

I thought they all had the parameter of pressing brake before shift, and if it doesn't one of the speed sensors must be reading something it does not like


Edited by - tkorpal on 05/16/2019 03:57:05 AM
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Thomasbus24
Administrator

USA
4420 Posts

Posted - 05/16/2019 :  04:44:55 AM  Show Profile  Reply with Quote
If you have a twin bus, I suggest swapping the TCM's and see if the problem follows. Of this era, they weren't exactly great.

We just had to replace an Allison TCM on a 2011 for this exact issue. Drove us nuts.
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aaronwilmoth80911
Top Member

519 Posts

Posted - 05/16/2019 :  06:55:25 AM  Show Profile  Visit aaronwilmoth80911's Homepage  Reply with Quote
Exactly what Thomasbus24 said
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tkorpal
Active Member

25 Posts

Posted - 05/16/2019 :  12:14:54 PM  Show Profile  Reply with Quote
Thank you. i will give it a try.
quote:
Originally posted by aaronwilmoth80911

Exactly what Thomasbus24 said

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tigger2
Advanced Member

USA
414 Posts

Posted - 05/17/2019 :  05:29:15 AM  Show Profile  Click to see tigger2's MSN Messenger address  Reply with Quote
You might try checking your throttle pedal if the computer sees sensor reading pedal depressed when it is not it will set range inhibit. Also known as idle validation switch.
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tkorpal
Active Member

25 Posts

Posted - 05/17/2019 :  05:30:12 AM  Show Profile  Reply with Quote
Thank you, i will check that too.
quote:
Originally posted by tigger2

You might try checking your throttle pedal if the computer sees sensor reading pedal depressed when it is not it will set range inhibit. Also known as idle validation switch.

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