RV Camping, Travel and Reviews at RV Tech Mag
WELCOME!
   Facebook    RSS Feed

Cruzer's RV TechMag is the ultimate source for technical articles, travel destinations, road tests and reviews as well as the latest and greatest RV products and accessories and editorial commentary related to the RV lifestyle. You may choose from the following selections to narrow down your area of interest.

All Articles Reviews Tech Travel Misc Highway Tales


Allison Generation 5 Prognostics

Accessing Prognostic Information from your Electronic Shift Controller
Article Date: April, 2017


/articlepics/80_prognostics_image-1.jpg

Allison Transmissions introduced their latest Generation 5 Electronic Controls Shift Selector for 2013 model year Allison 3000 and 4000 series automatic transmissions. This new package offers better detailed graphics and extensive information about the condition of your transmission. I'm sure you are familiar with the term diagnostics, which is information that helps you diagnose a problem. Prognostics is proactive information that supplies information prior to a problem so that hopefully you can avoid that from happening in the future. Allison's Generation 5 electronics offer new capabilities with advanacd prognostics. The Generation 5 shift selectors now feature easy-to-read LED displays that show both text and numerals.

The Generation 5 Transmission Control Module (TCM) is physically different than the previous generations so it's easy to determine which generation your coach has. The Gen 5 controller has flat ribs to help disburse the heat from inside the controller while the previous Gen 4 controller had an array of round posts that served as heat sinks. The following images show the difference between the two controllers.

/articlepics/80_prognostics_image-30.jpg
Generation 4 Controller

/articlepics/80_prognostics_image-31.jpg
Generation 5 Controller

 

Oil Life Monitor

The status of the oil life is displayed as a percentage (OIL LIFE 100%) until the fluid is due for a change.

/articlepics/80_prognostics_image-13.jpg

 

Filter Life Monitor

The status of the filter life is displayed as OIL FILTERS OK and alerts when filters are due for a change by displaying REPLACE FILTERS.

/articlepics/80_prognostics_image-14.jpg

Accessing Prognostics

When you are alerted via the wrench icon in the shift selector display, you can check the exact status by toggling through the display as follows:

 

Oil Life Monitor

/articlepics/80_prognostics_image-16.jpg


For a pushbutton shift selector, simultaneously press both the Up and Down arrows two times.

    


The percentage of fluid life remaining is displayed. New fluid is shown as OIL LIFE 100%.

/articlepics/80_prognostics_image-13.jpg

Filter Life Monitor

/articlepics/80_prognostics_image-16.jpg


For a pushbutton shift selector, simultaneously press both the Up and Down arrows three times.

    


Acceptable filter life is shown as OIL FILTERS OK. Unacceptable filter life is shown as REPLACE FILTERS.

/articlepics/80_prognostics_image-18.jpg

Transmission Health Monitor

/articlepics/80_prognostics_image-16.jpg


For a pushbutton shift selector, simultaneously press both the Up and Down arrows four times.

    


When TRANS HEALTH OK is displayed, clutch maintenance is not required. When TRANS HEALTH LO is shown, clutch maintenance is required.

/articlepics/80_prognostics_image-29.jpg

Resetting Prognostics

Use the following procedures to reset the fluid or filter life once the transmission has been serviced. Note that the Transmission Health Monitor can only be reset using the Allison DOC software after a clutch system issue has been corrected.

Oil Life Monitor

 

Primary Method

For either a pushbutton or bump lever shift selector, press and hold the Mode button for approximately 10 seconds while you are still in the Oil Life Monitor mode.

 

Secondary Method

This method works with either shift selector style - Perform the following sequence with the ignition on but with the engine not running. Do not stop the sequence for more than three seconds once you have started.

N-D-N-D-N-R-N

/articlepics/80_prognostics_image-22.jpg

 

Filter Life Monitor

 

Primary Method

For either a pushbutton or bump lever shift selector, press and hold the Mode button for approximately 10 seconds while you are still in the Filter Life Monitor mode.

 

Secondary Method

This method works with either shift selector style - Perform the following sequence with the ignition on but with the engine not running. Do not stop the sequence for more than three seconds once you have started.

N-D-N-D-N-R-N

/articlepics/80_prognostics_image-22.jpg

 

Fluid Levels

Allison transmissions rely on transmission fluid to lubricate and cool the transmission as well as transfer hydraulic power. Transmission fluid is the life blood of any automatic transmission therefore it is critical that the proper fluid level be maintained at all times. If the fluid level is too low the converter and clutches do not receive enough fluid to operate effectively and may be damaged. If the fluid level is too high, the fluid can aerate, which will cause the transmission to shift erratically and overheat.

Checking Fluid Levels

To enter the oil level check function:

  1. Park the vehicle on a level surface, shift to Neutral(N) and apply the parking brake.

  2. Simultaneously press both the Up and Down arrows one time.

  3. The fluid level reading will be delayed until the following conditions are me:

    • The engine must be at idle.

    • Transmission is in Neutral(N).

    • Output speed must be zero.

    • Fluid temperature must be above 140oF and 220o F.

    • Vehicle has been stationary for two minutes to allow the fluid to settle.


/articlepics/80_prognostics_image-10.jpg

4. The shift selector displays the oil level data as follows:

/articlepics/80_prognostics_image-24.jpg
Fluid level is Okay

/articlepics/80_prognostics_image-25.jpg
Fluid level is 2 quarts low

/articlepics/80_prognostics_image-27.jpg
Fluid level is 3 quarts high

5. If the oil check cannot be completed, one of the following fault messages will be shown:

/articlepics/80_prognostics_image-28.jpg

Press any range button to exit the oil level check function.

 

Diagnostic Codes

Your Allison's TCM contains a wealth of history and diagnostic capabilities. If it detects there is an issue the Check Trans light will and remain illuminated after initial vehicle startup. This signals that the TCM has detected an issue and has signaled a diagnostic code.

Retrieving Diagnostic Codes

  1. Bring the vehicle to a complete stop and apply the parking brake.

  2. Simultaneously press both the Up and Down arrows one time.

  3. The transmission fluid level will be shown in the display first, followed by the prognostics and then the diagnostic codes. Up to five codes may be recorded in memory.
  1. Each code remains in the display until the mode button is pushed. Then the next code is shown. Active codes are shown first, newest to oldest. Inactive codes retained in the memory will follow, if they exist.
   /articlepics/80_prognostics_image-3.jpg

   /articlepics/80_prognostics_image-4.jpg

/articlepics/80_prognostics_image-10.jpg

 

To exit the diagnostic code retrieval function:

  • Simultaneously press both the Up and Down arrows or press any range key.

  • Wait ten minutes and the system will automatically return to the normal; operating mode.

  • Turn off the vehicle's ignition key switch.

 

Source

Allison Transmission
(800) 252-5283
www.allisontransmission.com

 

1 2 3 4 5

Return to Home Page

If you enjoyed this article be sure to recommend RVtechMag.com to your friends, like us on Facebook or Twitter or subscribe to our RSS feed.

         Twitter Facebook Subscribe to RSS Feed












Article Sections

Departments

Website Areas

Road Tests and Reviews Home Page About Me
Tech Articles RSS Feeds Site Map
Travel Destinations Announcements Privacy Policy
Misc Articles Contact Us Advertise With Us
Columns Helpful Links  

 
© Copyright 2017 Mark Quasius All Rights Reserved
For more information feel free to Contact Us