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CONTROLS AND INSTRUMENTS
Automatic Transmission Fluid (ATF)
Temperature Warning Light
A/T
This warning light comes on when the
temperature of the automatic transmission
fluid is abnormally high.
If the light comes on while driving,
immediately pull safely off the road out
of the way of any traffic. Then check the
problem and take corrective actions as
follows:
Check and Corrective Actions
1. Put the transmission in neutral by placing the selector lever into "N" (ALLISON
2500 model transmission) or pressing the "N" selector button (ALLISON
3000/3500 model transmission). Run the engine at approximately 1,000 r/min
until the warning light goes out, indicating that the engine has cooled down.
2. After confirming that the warning light has gone out, check the automatic
transmission fluid level.
3. If the fluid level is correct, the abnormally high fluid temperature may have been
caused by a clogged ATF filter or because the vehicle was driven in a way that
imposed too much of a load on it.
If you have failed to replace the filter regularly, replace the filter.
Checking the Fluid Level
→ Refer to page 7-140
Checking the Fluid Level
→ Refer to page 7-144
Changing the Transmission Fluid
→ Refer to page 7-142
Changing the Transmission Fluid
→ Refer to page 7-151
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