Table 2–1. Fluid Level Shift Selector Display
Display Sequence Interpretation of Display
o L o K Fluid level is correct
o L L o 1 Fluid level is 1 quart low
o L H I 1 Fluid level is 1 quart high
The shift selector display will also show “invalid for display” codes one character
at a time. An “invalid for display” code is returned when fluid level data is
requested, but an operational condition has not been met. The “invalid for display”
condition interrupts the two minute countdown (momentary increase in engine
speed does not affect the countdown). The “invalid for display” codes and their
meaning are:
Table 2–2. Invalid For Display Codes
Display Sequence Interpretation of Display
o L – 5 0 Engine rpm too low
o L – 5 9 Engine rpm too high
oL –6 5 N (Neutral) not 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
NOTE: Report sensor failure to a distributor or dealer in your area.
Consult the telephone directory for the Allison Transmission distributor
or dealer near you.
The countdown is restarted when the condition causing the “invalid for display”
code 59 has been corrected. The countdown is not restarted if there is a
momentary increase in engine rpm which may generate a code 59. “Invalid for
display” messages are as follows:
• Allison DOC™ Display. “Invalid for display” messages are displayed in the
Oil (±) field of the Data Monitor.
Allison DOC™ Message
OL — SETTLING TIME X
OL — ENGINE SPEED LO
OL — ENGINE SPEED HI
OL — SELECT N (NEUTRAL)
OL — SUMP TEMP LO
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