Allison Transmission Emergency Vehicle Series Operator's Manual page 54

NOTE: WTEC III Controls displays fluid level diagnostic information
one character at a time.
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Allison 4
information two characters at a time.
• Low Fluid Level—"o L" is displayed ("o L" represents "Fluid (Oil) Level
Check Mode"), followed by "L o" ("L o" represents "Low Oil Level") and
the number of quarts the transmission fluid is low.
Example: o L L o 0 2
Where "2" indicates that 2 additional quarts of fluid will bring the fluid
level within the middle of the "o K" zone.
• High Fluid Level—"o L" is displayed ("o L" represents "Fluid (Oil) Level
Check Mode"), followed by "H I" ("H I" represents "High Oil Level") and
the number of quarts the transmission is overfilled.
Example: o L H I 0 1
Where "1" indicates 1 quart of fluid above the full transmission level.
• Invalid for Display — "o L" is displayed ("o L" represents "Fluid (Oil)
Level Check Mode"), followed by "—" (for WTEC III Controls) or "– –"
(for Allison 4
numerical display is a fault code and indicates conditions are not proper to
receive the fluid level information, or that there is a system malfunction.
The fault codes that may be encountered are shown in the Fluid Level Fault
Codes tables:
Fluid Level Fault Codes (for WTEC III Controls)
Display
o,L, —, 0, X
o,L, —, 5, 0
o,L, —, 5, 9
o,L, —, 6, 5
o,L, —, 7, 0
o,L, —, 7, 9
o,L, —, 8, 9
o,L, —, 9, 5
* Report sensor failure display to a distributor or dealer in your area (check the telephone directory
for an Allison Transmission distributor or dealer).
Generation Controls displays fluid level diagnostic
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Generation Controls) and a numerical display. The
Settling time too short
Engine speed (rpm) too low
Engine speed (rpm) too high
Neutral must be selected
Sump fluid temperature too low
Sump fluid temperature too high
Output shaft rotation
Sensor failure
Cause of Code
*
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