CTIS overspeed

[Retiredwarhorses]

Still getting CTIS overspeed lamp on...at all speeds above 30mph.
repalced the speed sensor...speedo is acting weird too, I think it's more accurate now, is is possible the CTIS controller is bad?

 

[Coffey1]

Set your Ctis to sand drive down hwy at 55 if your Ctis switches to hwy and inflates your tires back up don't worry about it.

 

[Retiredwarhorses]

And if it dont air up?

 

[Suprman]

The speedo and ctis speed measurement are fed off that stupid sender. The trans ecu uses it to decide shifts and all 3 are linked. Did you buy a new one? Sometimes it takes the ctis a few drives to clear the overspeed but the speedo should be right immediately.

 

[Retiredwarhorses]

The speedo and ctis speed measurement are fed off that stupid sender. The trans ecu uses it to decide shifts and all 3 are linked. Did you buy a new one? Sometimes it takes the ctis a few drives to clear the overspeed but the speedo should be right immediately.

Yes, brand new...when I put the truck into "D" the speedo will peg and settle back to 0. It's just all over the place....as well as some hard and late shifts. Need to drive it some more.....

 

[Suprman]

That should not happen. Try unplugging the ctis controller and see if any change. Maybe a bad connections somewhere. The plugs in the back of the trans ecu like to back themselves out.
Will

 

[Retiredwarhorses]

Where's the trans ECU on these trucks?

 

[Suprman]

Behind the shift keypad under the dash panel

 

[dalej]

Where's the trans ECU on these trucks?

http://www.steelsoldiers.com/attachment.php?attachmentid=586777&d=1444418318&thumb=1

 

[Retiredwarhorses]

Thank you fellas....

 

[Terrh]

Speedo jumpy and inconsistent is possibly a grounding issue.

 

[JoshuaGrooms83]

I know this ones a bit old but Ive seen somewhere around here someone mentioning that they had a CTIC over speed lamp flash once speed is over 30 mph and everything seems to be running fine so far?