P0711
DTC P0711
Circuit Description
The automatic transmission fluid temperature (TFT) sensor is a negative coefficient thermistor. When the transmission fluid is cold, the sensor resistance is high. As the transmission fluid warms up, the sensor resistance decreases. This diagnostic monitors the TFT sensor circuit. The circuit may be functional but not in the normal operating range. This diagnostic indicates stuck, erratic, intermittent, or skewed values, resulting in reduced system performance. The TFT sensor range is -40 to +151°C (-40 to +304°F).
If the transmission control module (TCM) detects an intermittent voltage or no voltage change in the TFT sensor circuit, then DTC P0711 sets. DTC P0711 is a type C DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0711 Transmission Fluid Temperature (TFT) Sensor Performance
Conditions for Running the DTC
^ No ECT DTC P0117 or P0118.
^ No ISS DTC P0716 or P0717.
^ No VSS DTC P0722 or P0723.
^ DTC P0711 has not passed this ignition cycle.
^ The engine coolant temperature is at least 70°C (158°F) and has changed by 55°C (99°F) since start up for Condition 1 and Condition 2.
^ The transmission fluid temperature is -39°C to 149°C (-38°F to 300°F).
^ The vehicle speed is 8 km/h (5 mph) or more for at least 5 minutes cumulative for Condition 1.
^ The TCC slip is 120 RPM or more for at least 5 minutes cumulative for Condition 1.
^ The calc. throttle position is between 8 and 90 percent for Condition 3.
^ The engine torque is 50 Nm (37 ft. lbs.) or more for Condition 3.
^ The vehicle speed is 8 km/h (5 mph) or more for Condition 3.
^ The engine speed is greater than 500 RPM for Condition 3.
Conditions for Setting the DTC
DTC P0711 sets when one of the following conditions occurs:
Condition 1
The change in transmission fluid temperature is 2°C (4°F) or less when the TFT is -40 to +21°C (-40 to +68°F) at start up for 80 seconds.
Condition 2
The change in transmission fluid temperature is 2°C (4°F) when the TFT is 129°C - 150°C (264°F - 302°F) at start up for 80 seconds.
Condition 3
The change in transmission fluid temperature is 20°C (68°F) or less after a predetermined time.
Action Taken When the DTC Sets
^ The TCM does not request the ECM to illuminate the malfunction indicator lamp (MIL).
^ The TCM freezes transmission adaptive functions.
^ The TCM calculates a default TFT from the ECT sensor and the IAT sensor.
^ The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
^ The TCM stores DTC P0711 in TCM history.
Conditions for Clearing the DTC
^ A scan tool can clear the DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the fault no longer exists and the DTC passes.
Test Description
The numbers below refers to the step numbers on the diagnostic table.
3. This step attempts to repeat the condition that set the DTC.
5. This step attempts to repeat the condition in the engine wiring harness.
6. This step determines if a condition exists with the TCM or TFT sensor.
