Without Scan Tool
DIAGNOSTIC FUNCTIONCHECK SELECTOR LEVER POSITION INDICATOR LIGHT
The selector lever position indicator light (D, 1 through 4 or 5) 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 selector lever position indicator light (D, 1 through 4 or 5) is flashing once per second.
Selector lever position indicator light (D, 1 through 4 or 5) flashing items
^ Input shaft speed sensor
^ Output shaft speed sensor
^ Each solenoid valve
^ Gear incorrect ratio
^ A/T control relay system
NOTE: If the selector lever position indicator light (D, 1 through 4 or 5) is flashing twice per second, the transmission fluid temperature is high. [It flushes when the fluid is approximately 125 °C (257 °F) or more and goes off when the fluid is approximately 115 °C (239 °F) or less]