Who knows about FCCC "MMDC" and its issues?

jerichorick wrote:
I understand the frustration you are going through. My 2005 Winnebago Vectra is at freightliner at this time for two issues, one being the odometer and the other being the failure of the coolant expansion tank.

Here is what I understand about this problem. The computer that monitors and all of the chassis functions is the ECM and it is fully programmable by Freightliner. One of the functions of this unit is to send a heartbeat signal to the MMDC. This in turn converts it's information to a signal that the dash readout (odometer) can display. The MMDC is not programmable according to Freightliner.

In my case, the MMDC failed. The replacement is displaying zeros on the dash from the factory. Freightliner is standing firm that it can not be calibrated to the known 53,913.0 miles stored in the ECM.

I am negotiating a trade. The dealer will not take my coach in trade if the odometer is not reading mileage correctly in the odometer.

I found bligidy.com in the Dallas, TX area. This is where the coach is in for repair. He claims to be one of three people qualified and experienced in calibrating the MMDC. I am hoping he will work on my coach today. I will post the results when I have it.

A instrument repair shop in Ft Myers, where the trade is located, says he can pump a signal into the MMDC to change the mileage to the correct value. This method is crude because it will take about a week to reach the 53,000+ goal. My dealer is satisfied with this and is willing to take my Vectra in trade.

As you can see, having the odometer set incorrectly can cost the owner hundreds of thousands of dollars at trade-in time. I feel Freightliner is very wrong for not doing what is common in the auto resale industry by not providing accuracy in the odometer reading when serviced.

I hope this information is helpful to you.

I know that Freightliner can preset the mileage in the MMDC in some fashion, because they did it on my coach when it was new. It had mileage from the factory, but there was an MMDC problem found before I picked the coach up and the MMDC was replaced by Freightliner and the mileage was reset to match what it was. My memory is that the local Freightliner service center had to provide the mileage to somebody else (Freightliner?) so that the MMDC could be set correctly before they received it.