Shift Pad Blank

Topic: Shift Pad Blank (Read 974 times) previous topic - next topic

Shift Pad Blank

April 23, 2019, 02:20:18 pm

Tried to leave campsite this morning and shift pad is blank and unable to shift transmission. I have disconnected all the connectors I can find and reconnected; the one on the pad, a small one on the transmission, and the big one about a foot above where the wiring harness enters the transmission. Also disconnected the chassis battery ground for 20 min and reconnected. I am thinking it may be a ground problem or something similar, but I do not know where the ground is located. Any ideas will be appreciated. I am in Lake Bob Sandlin SP near Mt. Pleasant TX. Looks like if I have to get a tow, the best option is Stuart and Stevenson in Longview. Have been on the phone with the service manager and he mentioned the ground and another box with a relay? that may be located somewhere. I don't really have a wiring diagram for the transmission. Could there be something behind the panel at the front where a lot of circuit breaker and a couple of relays are located? I had to drive to Mt Pleasant to get my phone to work and provide a hot spot for my laptop to send this. Will do some grocery shopping and check by in about 30 minutes.

Re: Shift Pad Blank

Reply #1 – April 23, 2019, 02:24:33 pm

Jerry,

Have you verified that BOTH the transmission fuses/breakers (a 5 and a 15 as I recall) are good? The small one is for "memory" the larger one for operating the shift pad/transmission.

Re: Shift Pad Blank

Reply #2 – April 23, 2019, 02:27:04 pm

As a second thought, before being towed, I would visit with S&S in Longview about paying one of their techs (even after hours) to bring over a spare/test shift pad and ECU as well as the Allison computer reader. Better than dragging the coach over there.

Re: Shift Pad Blank

Reply #3 – April 23, 2019, 02:57:12 pm

Quote from: wolfe10 – April 23, 2019, 02:24:33 pm

Jerry,

Have you verified that BOTH the transmission fuses (a 5 and a 15 as I recall) are good? The small one is for "memory" the larger one for operating the shift pad/transmission.

Brett, can you tell me where those fuses are and thanks for the other suggestions.

Re: Shift Pad Blank

Reply #4 – April 23, 2019, 03:13:40 pm

Anyone else know where the fuses are?

Re: Shift Pad Blank

Reply #5 – April 23, 2019, 03:17:58 pm

Found a trouble shooting guide. It's not real helpful for "blank shift selector". All it says is (page 8-2):

SHIFT SELECTOR DISPLAY IS BLANK

VIM fuse is blown - Replace VIM fuse

Poor battery power or ground connection - Clean and/or repair battery connections

Blown fuse or fusible link at battery - Replace battery fuse or fusible link

http://ww2.justanswer.com/uploads/HE/HeavyEquipmentTech/2013-09-22_223029_allison_transmission_md3060_trouble-shooting.pdf

Diagram on page 1-1 shows the VIM, but is no help in where it is actually located. I've never seen it on our coach. I only know of the ECU located on firewall in front of driver left knee.

Re: Shift Pad Blank

Reply #6 – April 23, 2019, 03:29:14 pm

Quote from: Chuck & Jeannie – April 23, 2019, 03:17:58 pm

Found a trouble shooting guide. It's not real helpful for "blank shift selector". All it says is (page 8-2):

SHIFT SELECTOR DISPLAY IS BLANK

VIM fuse is blown - Replace VIM fuse

Poor battery power or ground connection - Clean and/or repair battery connections

Blown fuse or fusible link at battery - Replace battery fuse or fusible link

http://ww2.justanswer.com/uploads/HE/HeavyEquipmentTech/2013-09-22_223029_allison_transmission_md3060_trouble-shooting.pdf

Diagram on page 1-1 shows the VIM, but is no help in where it is actually located. I've never seen it on our coach. I only know of the ECU located on firewall in front of driver left knee.

Thanks, I am going back to the park now and will try to see what I can find or do about the fuses and ground.

Re: Shift Pad Blank

Reply #7 – April 23, 2019, 05:06:21 pm

Call Transmission Instrument in Prairie View,TX. I had the same problem on my previous SOB and he walked me through the trouble shooting. Pad/computer was bad and he did a three day repair including shipping time. Great people! 972-353-8286

Re: Shift Pad Blank

Reply #8 – April 23, 2019, 05:21:20 pm

X2 on your service shop recommendation. John Kopalek rebuilt our shift pad and ECU four years ago - has worked perfect since.

There is a trouble shooting page on his web site, including a way to check a "dead" WTECII shift pad with a 9V battery:

Transmission Instruments

WTECII

Re: Shift Pad Blank

Reply #9 – April 23, 2019, 05:36:02 pm

I had the same thing happen. Got wiring diagram found ground wires in harness and solder new wire to old wires didn't cut them run new wire to-ground bar under dashboard

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Reply #10 – April 23, 2019, 06:34:20 pm

Found a old (partial) thread where Roland had a dead shift pad. His story starts at Reply #15 in the thread. He never found the elusive fuses, and I have looked around on our coach and don't have a clue where they might be located.

Sorta humorous, in a twisted way, that Jerry was a respondent in Roland's problem thread from a year ago.

In Roland's case, he had to install a new shift pad to get back in operation.

The dreaded DAL (Dead Along Road)

Re: Shift Pad Blank

Reply #11 – April 23, 2019, 06:50:39 pm

Chuck,

You are correct those are for the engine ECM. I am in another world today as things are falling down around my feet.
I will go and delete this as to save the confusion and get back on track.

Mike

Re: Shift Pad Blank

Reply #12 – April 23, 2019, 06:55:39 pm

Jerry,

The breakers for the trans. ECM should be on 2 different breakers that are hid behind the kick panel in front of the passengers seat.
I don't have a print here with me for your year coach to be able to tell you the 2 breaker numbers. If it did trip it should self reset unless the breaker has died.

Mike

Re: Shift Pad Blank

Reply #13 – April 23, 2019, 08:24:41 pm

Quote from: Pamela & Mike – April 23, 2019, 06:55:39 pm

Jerry,
The breakers for the trans. ECM should be on 2 different breakers that are hid behind the kick panel in front of the passengers seat.
I don't have a print here with me for your year coach to be able to tell you the 2 breaker numbers. If it did trip it should self reset unless the breaker has died.
Mike

I believe the 2 breakers are #1 and #7, at least for my model/yr coach and the electrical print. See attached.

Re: Shift Pad Blank

Reply #14 – April 24, 2019, 01:02:05 am

Do you have power when ignition is on, gauges work? How about jumper the famous ignition relay at bottom center of 12volt breaker panel in front of passenger seat?

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Reply #15 – April 24, 2019, 12:05:35 pm

I had to replace my shifter pad. I was fortunate enough to find one at a discounted price at an Allison dealer in Tuscon AZ. I followed up on my repair in the DAL thread.

Roland

Re: Shift Pad Blank

Reply #16 – April 24, 2019, 12:35:09 pm

Jerry, in the DAL thread you will find a writing diagram. That diagram shows which terminals on the shift pad that hsve the input DC voltage. I had voltage on those terminals and the pad did not light up. Why I replaced the shift pad.

Roland

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Reply #17 – April 24, 2019, 01:19:40 pm

Jerry,

On other thought that has came to me while responding to another thread that could relate to your trouble. You have a 30amp breaker that feeds the transmission buss (this is the buss that is hid behind the kick panel) If this buss is dead then you need to check the 30 amp breaker that feeds the buss. The 30 amp feed to comes off one of the 90 amp breakers that are on the basement breaker panel. Look on your B-2126 print to see what I am referring to.

Mike

Re: Shift Pad Blank

Reply #18 – April 24, 2019, 01:53:05 pm

After my last post, I was out of contact. T-Moble has no coverage at LBS state park. Problem has been fixed and coach running as usual. Stopped in New Boston for lunch. Stuart and Stevenson sent a good mechanic Owen Stott who knew what he was doing. Problem was a bad ground, so I did not have to buy any parts. He came with a spare pad and ECU, and a wiring diagram. We didn't spend time looking for the ground, he spliced in a secondary ground. The ECU is located behind the kick panel to the left of the drivers foot. Thanks for all the suggestions, even though I did not see most of them until after the repair. It would have been difficult for me to repair even with a wiring diagram. Brett had the right idea to get a mechanic instead of a tow. Thanks.

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Reply #19 – April 24, 2019, 02:19:24 pm

To give credit due, Chuck Van Tassel (Reply #9) had the correct answer! We will all try to remember for next time (and there will be a next time...)

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Reply #20 – April 25, 2019, 01:01:52 pm

Quote from: Chuck & Jeannie – April 24, 2019, 02:19:24 pm

To give credit due, Chuck Van Tassel (Reply #9) had the correct answer! We will all try to remember for next time (and there will be a next time...)

Yes, Van Tassel had the answer. Now that I have had time to process all the posts or had a good wifi/cell connection at the park, maybe I could have done something to fix it, but most likely not. I did remember unplug the shift pad, did that several times, engine started and ran fine, gauges working. I wonder if there is something else at that ground point. Guessing that it needs cleaning up, maybe some rust causing a poor connection. Got the bill today, a coach buck. The 2 ground wires coming out of the connector were black, if that is any help. Getting the connection wrong could mean buying a new ECU which is somewhere near $3500, or more depending.

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