Monitor Description
This DTC indicates that there is a problem with output signals from the automatic transmission fluid (ATF) temperature sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF temperature into an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature and detects an open or short in the ATF temperature circuit or a fault of the ATF temperature sensor.
After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature is below 20°C (68°F) after running the vehicle for a certain period, the ECM interprets this as a malfunction, illuminates the MIL and stores the DTC.
When the ATF temperature is 110°C (230°F) or higher and the engine coolant temperature takes 10 sec. or more to reach 60°C (140°F) after a cold start, the ECM also determines this as a fault, illuminates the MIL and stores the DTC.