Alison transmission computer

[Tom_Barb]

Most probable cause ?
no shift panel lights,
no start.
ACC side of the ignition works, all systems work.
IGN side of the ignition works normal.
Strat position goes dead when you try to start.

Thanks for the help.

[ArchHoagland]

Thanks for the update, glad to hear it's fixed and I'll bet you are too...

[Tom_Barb]

We have discovered the problem,, we changed the Transmission ECU,, it did not fix the problem,,changing the major Battery cable fixed it.

corrosion ate the end of the cable nearly off. it will show continuity, but when place a load the cable would fail.

[gatorcq]

A friend went through this. Bad ground on/near the TCM.

[ArchHoagland]

Any luck yet? Besides bad luck....

[kane8907]

How much does it cost to change an pressure sensor in a repair shop?

**Link Removed**

[donkeydew]

it can be many things when my cat low fuel pressure sensor when out it went blank
mobile mechanic scanned the engine and replaced the sensor all was good the allison pad lit right back up. i had called coach net and the first thing they ask was if the pad was lit,when i said no the ask if i needed a tow or or mobile mech.

[larry_cad]

Shift panel lights went out on mine, lost power to the panel. Apparently broken wire. Shop installed a new wire. All good.

[Tom_Barb]

Mel Stuplich wrote:
Tom/Barb
No 12V power to the Allison VIM ... (blown fuse?/ bad wire?)

VIM. = ?

all fuses have been checked
all relays have been checked

all system operating.

except the start position.

the starter/relay/ ignition switch/ have been changed.

nothing fixed it.

[Mel_Stuplich]

Tom/Barb
No 12V power to the Allison VIM ... (blown fuse?/ bad wire?)