Without Scan Tool
CHECK "N" RANGE LIGHTThe "N" range light flashes once per second if there is an abnormality in any of the items in the table below which are related to the A/T system. Check for diagnostic trouble codes if the "N" range light is flashing once per second.
"N" RANGE LIGHT FLASHING ITEMS
CAUTION
If the "A/T TEMP" indicator light is illuminated, the transmission fluid temperature is high. (it flushes when the fluid is approximately 125 degrees C (257 degrees F) or more and goes off when the fluid is approximately 115°C (239°F) or less)