Allison fault code ???

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Allison fault code ???

January 22, 2012, 11:39:55 am

Went out this morning to take my rv on her weekly jog. Had accidently left booster switch on with a couple lights on and furnace running since last week. Virtually drained, both. Jumped off engine batteries with the pickup, let idle a few minutes, Tranny will not shift into D or R have searched for codes, and found my code sheet in manuel, but I'm not seeing a oL-70..... What does this mean? Ideas on rebooting?

2000 gv320

David

Re: Allison fault code ???

Reply #1 – January 22, 2012, 12:40:08 pm

Display Fault code
Fluid Level
Fault Code Description
oL, – –, 0X* Setting time too short
oL, – –, 50 or , EL Engine speed too low
oL, – –, 59 or , EH Engine speed too high
oL, – –, 65 or , SN Neutral must be selected
oL, – –, 70 or , TL Sump fluid temperature too low
oL, – –, 79 or , TH Sump fluid temperature too high
oL, – –, 89 or , SH Output speed high
oL, – –, 95 or , FL Oil level sensor failed**
*

Re: Allison fault code ???

Reply #2 – January 22, 2012, 12:44:58 pm

Yup, if the transmission fluid is not warm enough, that is the NORMAL code.

Re: Allison fault code ???

Reply #3 – January 22, 2012, 02:55:23 pm

I would do the following. Get the generator started, or plug to a 50A supply. Turn on the boost switch and allow all batteries to fully charge. That will take several hours. I measure the progress of charging from the control panel for converter/inverter/battery state. After all batteries are charged, I would start the "big" engine, turn off the boost switch, and check for normal operation of all systems.

I would expect things to work well after the batteries are charged. However, it's possible that one or more batteries may have failed under the stress.

Other folk may have other suggestions or specific experience.

Re: Allison fault code ???

Reply #4 – January 22, 2012, 04:04:53 pm

Simple to just start the engine, leave warm up at fast idle. You would most likely not start up a cold engine and stick in gear and head for the highway. So give everything a little to warm up.
FWIW

Re: Allison fault code ???

Reply #5 – January 22, 2012, 04:24:42 pm

Have not seen the specs for the min temp for the transmission, hoping someone can provide that spec. info/
Thanks

Re: Allison fault code ???

Reply #6 – January 22, 2012, 05:00:34 pm

Dave,

http://www.allisontransmission.com/servlet/DownloadFile?Dir=publications/pubs&FileToGet=SA3360EN.pdf

Page 8: To be able to accurately check fluid level, fluid must be between 140 and 220 degrees F.

Brett

Re: Allison fault code ???

Reply #7 – January 22, 2012, 07:38:04 pm

Brett, Understand, my question seems to elude me for an answer, The question is at what temp range would you get the ol 7,0 indication meaning transmission sump too cold.
Having never had that condition, I wonder at what temp that could be expected ?
As i Keep the coach in a heated garage, I never have seen such alarm.
Just wondering .
Thanks

Re: Allison fault code ???

Reply #8 – January 22, 2012, 08:43:04 pm

Dave,

That code comes up when the shift pad is used to check fluid level and also for diagnostic codes.

It does not come up as a stored code because of low ambient temperature.

Don't know if that answers your question.

Re: Allison fault code ???

Reply #9 – January 22, 2012, 08:47:40 pm

Another way to ask, Ratbug said his transmission would not work and gave a code of
ol 70, think that means oil is too cold, maybe that is too cold to get a reading for level, but I was wondering if it was why the transmission was no going into R or D . ??
Guess I read it as the ol 70 was the code for not working instead of checking the oil level.
Never a dull day.
Thanks

Re: Allison fault code ???

Reply #10 – January 22, 2012, 08:54:03 pm

Dave,

When the transmission is cold, you will always get that code. If checking for "real" diagnostic codes, you have to go past the oil level check, which will take you to any stored diagnostic codes.

Re: Allison fault code ???

Reply #11 – January 22, 2012, 11:08:39 pm

Ugghhh... morning temps around 42ish, fault code IMO not reason for lack of shifting.

I'm leaning towards exhausted batteries. Purchased 3 coach batteries back in september, never checked fluid levels until today..added close to 10 oz water in each cell of all 3 batt., ran generator all day, but prosine indicating fault of some kind, and would not clear or reset. Engine batteries, recovered and charged up, fired up cummins several times while learning codes. Tranny still not responding to shift request. Considering disconnecting all power for a while to see if tranny will re-set itself?
Thoughts and ideas...

??

David

Re: Allison fault code ???

Reply #12 – January 22, 2012, 11:18:39 pm

Call mike at Mot, you will need to reset prosine, he can talk you through procedure on phone, and probably help you with tranny. When my batteries got to low, inverter tripped odd line and had to be reset to return to normal and charge

Re: Allison fault code ???

Reply #13 – January 22, 2012, 11:31:50 pm

Thanks Tim,
I will be taking another attempt tomorrow, may have to go that route.

david

Re: Allison fault code ???

Reply #14 – January 23, 2012, 12:05:26 am

ratbug,
If you have a push button shift selector, you push the up and down arrow simultaneously to enter
the oil level display. To enter the Diagnostic Mode, press the same buttons twice to display diagnostic codes.
It looks like the engine must be at idle for the Oil Level Sensor to work. I am not sure if the engine needs to be running or not for the diagnostic codes to display. Maybe someone else can enlighten us on that.
Attached is a code reference compliments of Barry Beam.
Allison Transmission Codes Manual

Re: Allison fault code ???

Reply #15 – January 23, 2012, 08:09:39 am

Verify battery voltage with a digital voltmeter, particularly at the chassis battery. As suggested, no point in trying to troubleshoot a system powered by 12 VDC if they don't have 12 VDC.

Wouldn't hurt to verify 12+ VDC to the TWO Allison fuses as well.

Brett

Re: Allison fault code ???

Reply #16 – January 23, 2012, 08:17:55 am

How high is you idle. It won't shift out of neutral if the idle is high.

Re: Allison fault code ???

Reply #17 – January 23, 2012, 04:23:00 pm

Update,
"Reset" Prosine at main box switching to bypass and back whiletaking a lunch break today, checked upstairs and charging was taking place once again with generator. Left Generator running at 2PM will be home shortly to take a look at the transmission.. gotta be a fluke shutdown that has something to do with low voltage.

Thanks again for the suggestions

david

Re: Allison fault code ???

Reply #18 – January 23, 2012, 07:03:24 pm

Grrr....

With batteries charged properly, I fired up the cummins to proper temp. Still had flashing 6 on the shifter.

Quick walk around once more.....decided to extend and retract slide....

I now have shifting abilities!!

You regulars gotta love us rookies.....

David

Re: Allison fault code ???

Reply #19 – January 23, 2012, 07:39:51 pm

A flashing six could be due to too high an idle speed. See Dave's post above.

The transmission has a "protect" feature. If idle speed is too high (read that as too much torque) it will not shift into gear, but will flash the selected gear.

Use your cruise control to idle up and try to shift-- you will see this!

Brett

Re: Allison fault code ???

Reply #20 – January 23, 2012, 11:15:22 pm

Quote from: wolfe10 – January 23, 2012, 07:39:51 pm

A flashing six could be due to too high an idle speed. See Dave's post above.

Brett

My idle speed was around indicated 600 rpm... My money is on slide sensor, just out of alignment. Would be nice if diagnostics could identify what sensor was sending stop messages to the tranny.

Thanks again for the info and help,
these large animals have a few more wires then the old 240z I like to piddle with.

David

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