Advanced Diagnostics

Advanced Diagnostics - DTC P0711: Problem In ATF Temperature Sensor Circuit











General Description
The ATF temperature sensor is a thermistor type sensor that changes resistance according to the change in ATF temperature. The powertrain control module (PCM) sends a 5 V reference voltage to the sensor through a pull-up resistor. When the ATF temperature is low, the sensor resistance increases and the PCM detects a high signal voltage. As the ATF temperature rises, the sensor resistance decreases and the PCM detects a low signal voltage. If the ATF temperature sensor signal does not change, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions
1. Stuck at low temperature






2. Stuck at high temperature






Malfunction Threshold
1. Stuck at low temperature
The current ATF temperature is -4 °F (-20 °C) or less after Enable Conditions.
2. Stuck at high temperature
The current ATF temperature is 230 °F (110 °C) or more after Enable Conditions.

Driving Pattern






1. Stuck at low temperature
1. Start the engine with the engine coolant temperature at 95 °F (35 °C) or less.
2. Warm up the engine until the engine coolant temperature reaches 158 °F (70 °C) or more.
3. Drive the vehicle at a speed of 19 mph (30 km/h) or more with the throttle position at 4° or more for at least 5 minutes.

2. Stuck at high temperature
1. Turn off the engine with the engine coolant temperature at 158 °F (70 °C) or more.
2. Restart the engine after the engine coolant temperature drops to 95 °F (35 °C) or less.
3. Warm up the engine until the engine coolant temperature reaches 158 °F (70 °C), and wait for at least 20 seconds.

- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, a Confirmed DTC and the freeze data are stored. The MIL does not come on.

Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.