Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 13, 2025 ...

ECU Rebuild

September 17, 2021, 03:26:48 pm

Who is the guy that rebuilds the ECU?

I've been looking on Foreforum for awhile and haven't come up with it.

Jo

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Re: ECU Rebuild

Reply #1 – September 17, 2021, 03:30:21 pm

Allison ECU and shift pad repair:

Transmission Instruments

But, start by verifying 12 VDC to both ECU feeds and good ground first.

Then, check for diagnostic codes.

Let us know what is happening and perhaps we can assist.

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Re: ECU Rebuild

Reply #2 – September 17, 2021, 03:47:08 pm

For a 1994 Foretravel, a U300 with a Detroit is the only engine I can think of that is electronic. I've never heard of a Detroit DDEC II ECU failing. Are you sure that is the problem? Have you looked at codes? Used a ProLink 9000 to troubleshoot? It can quickly test the injectors and many other components. How about including the model you own?

What are the symptoms?

Pierce

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Re: ECU Rebuild

Reply #3 – September 17, 2021, 04:10:58 pm

Thanks I changed my profile to include more info.

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Re: ECU Rebuild

Reply #4 – September 17, 2021, 04:19:41 pm

That is a mechanical engine so won't have an engine ECU. Perhaps for the transmission. Have you checked for transmission codes by flipping the switch under the dash and counting the flashes on the light bulb. What kind of symptoms are you having?

If I remember, that's a 6 speed, correct? Possible article here: Own an allison md3060 from the 90's better read this - iRV2 Forums

Pierce

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Re: ECU Rebuild

Reply #5 – September 17, 2021, 04:23:25 pm

Thanks Brett I thought Twig said it was a Robert. I see it's John on the website.
I wanted to know who to contact incase we need it.

Twig instructed me to reseat the 2 connections on the box. Which I did.
He said to turn the ignition on several times. We haven't seen the cat eye's since.

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Re: ECU Rebuild

Reply #6 – September 17, 2021, 04:42:49 pm

It IS John.

What DIAGNOSTIC CODES do you get using the shift pad?
 
If, you need the "how to", let us know.

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Re: ECU Rebuild

Reply #7 – September 17, 2021, 04:47:35 pm

I guess we need the how to. Are there instructions that I could print off?

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Re: ECU Rebuild

Reply #8 – September 17, 2021, 04:56:05 pm

Ignition on, engine off.

Hit the Allison shift pad up and down arrows at the same time.

That MAY bring up OL.  If so, hit the up and down arrows again at the same time.

That will bring up d-1. If earlier version of the ECU, the first hit of the arrows will bring up d-1.

Write down any codes.

If there is a d-1 code, hit mode to go to d-2.  Repeat until you get to d- whatever and - - which means no more diagnostic codes.

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Re: ECU Rebuild

Reply #9 – September 17, 2021, 05:17:47 pm

OK ran through the steps.
One press d-1
6 9
3 2
d-2
- -
Jo

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Re: ECU Rebuild

Reply #10 – September 17, 2021, 05:35:33 pm

Quote from: Tom and Jo – September 17, 2021, 05:17:47 pm

One press d-1
6 9
3 2

Code 69-32 is a bad sign.  You may get along ignoring it for a while, but eventually you will be stranded and unable to get the coach into gear.  Call John Kopalek and get his opinion.

Excerpt below from the Transmission Instruments trouble shooting page:

Instructions for WTECII system (two digits on Your shift selector)

For 1992, 1993, 1994, and early 1995 models if experiencing erratic or no display; especially when there is cold weather or have retrieved any trouble codes.
Have you seen code 69-32 already? Stop troubleshooting = 100% defective ECU!

ECU

John rebuilt my Allison ECU 6 years ago.  It has worked perfectly ever since.  Small cost for mucho Peace of Mind! 

No start, with Allison "snake eyes" (Problem Solved)

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Re: ECU Rebuild

Reply #11 – September 17, 2021, 05:53:16 pm

Here's a link to the complete list of Allison trouble codes, in case you are curious.  You may already have this document in your Owners Manual collection.

Allison Transmission - Shift Selector - Operator and Diagnostic Trouble Code...

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Re: ECU Rebuild

Reply #12 – September 17, 2021, 05:58:33 pm

OK We have a plan.
I called and talked to John at Transmission Instruments.
We will remove the ECU and Transmission panel and send them tomorrow.

Thank you so much for the help with this.
I'd rather get it fixed than wait to see if it happens again.

Jo

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Re: ECU Rebuild

Reply #13 – September 17, 2021, 06:00:37 pm

Jo......you got the cat eyes. Cat eyes means you lost communication between the pad and ECU. It could be the connectors (80%) OR the power supply. As long as you haven't seen the symptom since re-connecting you are probably ok. IF it happens again send it off to JOHN. There is no Robert.

edit: or follow your own plan.

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Re: ECU Rebuild

Reply #14 – September 18, 2021, 04:55:10 pm

Didn't want to take a chance. I sent it to John
Jo

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Re: ECU Rebuild

Reply #15 – September 18, 2021, 06:29:19 pm

Jo
While the parts are out to John, might take a multimeter and do a pin to pin check and ensure connectivity. While doing the pin to pin, always check for ground after continuity to see if wiring has break and grounding out.
ECU

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