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 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:
^ Input shaft speed sensor
^ Output shaft speed sensor
^ Each solenoid valve
^ Gear incorrect ratio
^ A/T control relay system
CAUTION: If the "N" range light is flashing approximately twice per second, the transmission fluid temperature is high (It flashes when the fluid is approximately 125°C or more and goes off when the fluid is approximately 115°C or less).