Holiday Navigator 2003 Owner's Manual page 435

The Importance of Proper Fluid Levels:
Transmission fluid cools, lubricates and transmits hydraulic power. Proper
fluid levels must be maintained at all times. If fluid level is too low, the converter
and clutches do not receive an adequate supply of fluid. If fluid level is too
high, the fluid can aerate. Aerated fluid can cause the transmission to shift
erratically or overheat.
The MH Series oil level sensor (OLS) allows the operator to obtain an
indication of sensor fluid level from the keypad shift selector. Frequently
check for the presence of oil level diagnostics in the transmission. If the OLS
has not been detected, troubleshooting of the OLS circuit is required. This will
have to be performed by an Allison Service Center. After the OLS circuit is
repaired, ensure that reset of the "autodetect" or manual selection of the OLS
function by using a Pro-Link transmission diagnostic center.
Fluid Level Check with the Keypad:
To Enter Oil Level Sense Mode:
• Park the motorhome on a level surface. Place the transmission in
"N" and set parking brake.
• The transmission temperature must be at least 140º F./60º C,
otherwise an error code will appear.
• The motorhome must be stationary and in Neutral for approximately
two minutes to allow the fluid to settle in the sump.
• The engine must be idling lower than 800 RPM.
• Simultaneously press the Up and Down buttons once.
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.
• "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 indicate 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 below in the chart.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
N A V I G A T O R 2 0 0 3
Common Oil Level Fault Codes:
Display 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
o,L - 7,0 Sump fluid temperature too low
o,L - 7,9 Sump fluid temperature too high
o,L - 8,9 Output shaft rotation
o,L - 9,5 Sensor failure
Chassis Information
1 0 • 4 3 5