The Importance Of Proper Fluid Levels; Fluid Level Check With The Keypad; Common Oil Level Fault Codes - Monaco DIPLOMAT 2004 Owner's Manual

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 check the
transmission 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 is enabled 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 in the chart.
CHASSIS INFORMATION

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
DIPLOMAT 2004
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