NOTE: WTEC III Controls displays fluid level diagnostic information
one character at a time.
Allison 4
th
Generation Controls displays fluid level diagnostic
information two characters at a time.
• Low Fluid Level—“oL” is displayed (“oL” represents “Fluid (Oil) Level
Check Mode”), followed by “Lo”(“Lo” represents “Low Oil Level”) and
the number of quarts the transmission fluid is low.
Example: oLLo02
Where “2” indicates that 2 additional quarts of fluid will bring the fluid
level within the middle of the “oK” zone.
• High Fluid Level—“oL” is displayed (“oL” represents “Fluid (Oil) Level
Check Mode”), followed by “HI”(“HI” represents “High Oil Level”) and
the number of quarts the transmission is overfilled.
Example: oLHI01
Where “1” indicates 1 quart of fluid above the full transmission level.
• Invalid for Display —“oL” is displayed (“oL” represents “Fluid (Oil)
Level Check Mode”), followed by “—” (for WTEC III Controls) or “––”
(for Allison 4
th
Generation Controls) and a numerical display. The
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 Cause of Code
o,L, —, 0, X Settling 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 Sumpfluid temperature too low
o,L,—,7,9 Sumpfluid temperature too high
o,L, —, 8, 9 Output shaft rotation
o,L, —, 9, 5 Sensor failure
*
* Report sensor failure display to a distributor or dealer in your area (check the telephone directory
for an Allison Transmission distributor or dealer).
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