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The transmission is now in Oil Level Sense
mode. The display will indicate one character
at a time. An "o" followed by "L" represents
oil level check mode. One of the following
will be indicated:
Common Oil level Fault Codes
dsplay
cause of code
o,l - O,X
setting time too short
o,l - 5,0
engine speed (rPM) too low
o,l - 5,9
engine speed (rPM) too high
o,L - 6,5
neutral must be selected
Sump fluid temperature too low
o,l - 7,0
Sump fluid temperature too high
o,l - 7,9
o,l - 8,9
Output shaft rotation
o,l - 9,5
sensor failure
"o K" represents the level is okay.
"Lo" represents a low fluid level
followed by a numeric indication of the
number of quarts needed fill the sump.
"HI" represents an overfull condition
followed by a numeric indication of the
number of quarts the sump is overfull.
A countdown of flashing numbers
indicates the fluid is still settling. When
the fluid has stabilized in the sump, the
true level will be indicated.
If an "o" "L" "-" followed by a
number displays, the oil level sensor
could not read the level due to one of
conditions listed in the "Common Oil
Level Fault Codes" chart.
Exit by pressing "N."
Cold Check - Manual Check Procedures:
The concept of a cold check is to determine
adequate fluid level for safe operating such
as after a fluid and filter change. A cold
23
check should be performed after transmission
maintenance or service until a hot fluid level
check or fluid level check from the shift
selector can be performed.
To Check the Fluid When Cold:
Park the motorhome on a level surface.
Set the parking brake.
Chock the wheels to prevent the
motorhome from moving.
Start the engine.
Allow the engine to run at idle (500 to
800 RPM) for one minute.
Apply the service brakes and shift to D
(Drive), then to N (Neutral) and next to
R (Reverse) to fill the system. Shift the
transmission to N (Neutral) and release
the service brakes. Allow the engine to
idle at 500 to 800 RPM.
Remove the dipstick and wipe clean.
Reinsert the dipstick fully into the
tube, then remove to check fluid level.
Repeat to verify reading, if needed.
Safe operating level is anywhere within
the Cold Check band on the dipstick.
This allows safe operation of the
transmission until a Hot Check or fluid
level check from the shift selector can
be performed.
If the level is not within this band,
add or drain the fluid as necessary to
put the level to the middle of the Cold
Check band.
Perform a fluid level check from the
shift selector or a Hot Check at the first
opportunity when normal operating
temperatures are reached.
CAUTION
Low or high fluid level can cause
overheating and irregular shift
patterns. These conditions can damage
the transmission if not corrected.
Fluid Levels - Hot Check
Fluid level rises as temperature increases.
Fluid must be hot to ensure an accurate check.
Be sure fluid has reached normal operating
temperature. If a transmission temperature
gauge is not present, check the fluid level
when the engine water temperature gauge has
stabilized and the motorhome has been driven
for at least one hour.
Park the motorhome on a level surface
and shift to N (Neutral). Apply the
parking brake and allow the engine to
idle (500 to 800 RPM).
After wiping the dipstick clean, check
the fluid level. Safe operating level is
anywhere within the Hot Run band on
the dipstick.
The width of the Hot Run band is
approximately one quart of fluid at
normal temperature range.
If the level is not within this band, add
or drain the fluid as necessary to put
the level within the Hot Run band.
Ensure that fluid level checks are
consistent. Check the level more than
once. If readings are not consistent,
ensure the transmission breather is
clean and not clogged. If readings are
still not consistent, contact the nearest
Allison Service Center.
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Troubleshooting
