Allison Transmission "Do Not Shift" warning

[LSepulveda]

I have a 1998Newmar Dutchstar. I previously posted about the "Do Not Shift" warning that appeared as I was driving to a shop. I learned that I should push up and down arrows on the shifter to get diagnostics. The following is what I saw:

d 1, 1 3, 1 2
d 2, 1 3
d 3, - -
d 4, - -
d 5, - -

Anyone know what the codes mean?

Lou

[dereed999]

Check here: http://www.rvtechlibrary.com/transmi...t_selector.pdf Might be slightly different (don't know model of your transmission, etc) but guessing you have a 3000 or 4000.

Based on that, you have "ECU INPUT VOLTAGE LOW". A quick google gives the following (from Western States Converters and Transmissions - Troubleshooting Guide)

Check:

a. Battery direct ground and power connections are tight and clean.

b. Vehicle batteries are charged.

c. Vehicle charging system is not over- or under - charging.

d. VIM fuse is good.

e. VIM connections are tight, clean, and undamaged.

f. Vehicle manufacturer supplied wiring is correct.

g. ECU connectors are tight, clean and undamaged.

I can't help you beyond that!