Monitor Description

This DTC indicates that there is a problem with output from the ATF temperature sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, detects open or short circuits of the ATF temperature circuit, and detects faults in the ATF temperature sensor.

Condition A (2-trip detection logic):

First, the ECM checks for the following conditions:

1. 17 minutes or more after the engine is started and after 9 km (5.6 miles) or more of driving, the ECT is -15°C(5°F) or more.
2. After starting the engine and a certain period of time has elapsed, the ECT and IAT are -10°C (14°F) or more.

If the conditions are met, the ECM then checks if the ATF temperature is less than 20°C (68°F). If so, the ECM interprets this as a fault and illuminates the MIL.

Condition B (2 -trip detection logic):

First, the ECM checks for the following conditions:

1. ECT is 60°C (140°F) or more.
2. After starting the engine and a certain period of time has elapsed, the ECT is less than 35°C (95°F).

If the conditions are met, the ECM then checks if the ATF temperature is 100°C (212°F) or more. If so, the ECM interprets this as a fault and illuminates the MIL.