P0711

DTC P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance





Circuit Description
The TFT sensor is a positive temperature coefficient thermistor (temperature sensitive resistor) that provides information to the TCM regarding transaxle fluid temperature. The temperature sensor is located in valve body. Calculated temperature is a factor used to determine the shift time and shift delay time.
The internal electrical resistance of the sensor varies in relation to the operating temperature of the transaxle fluid.
The TCM sends a 5 volt reference signal to the temperature sensor and measures the voltage rise in the electrical circuit. A higher fluid temperature creates a higher resistance in the temperature sensor, thereby measuring a higher voltage signal.
The TCM measures this voltage as another input to help control line pressure, shift schedules and TCC apply. When transaxle fluid temperature reaches 120°C (248°F) the TCM enters "hot mode." Above this temperature the TCM modifies transaxle shift schedules and TCC apply in an attempt to reduce fluid temperature by reducing transaxle heat generation.

Conditions for Setting the DTC
- Temperature has not changed more than 3.5°C (38.3°F).
- Engine speed is greater than 500 rpm.
- System voltage is greater than 9 volts.
- No CAN error DTCs P1671, P1672, and P1673.
- No vehicle speed error DTCs P0720, P0721, or P0722.
- Vehicle speed is greater than 20 km/h (12 mph) for 500 seconds cumulative.
- Temperature at start up is between -40°C (-40°F) and 20°C (68°F).
- Engine coolant temperature has changed by more than 50°C (122°F) since start up.

Action Taken When the DTC Sets
- The hold lamp will blink.
- The TCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Failure Records buffer. TCM assume the transaxle fluid temperature is 60°C.
- No influence on driveablity.

Conditions for Clearing the MIL/DTC
- The blinking hold lamp will turn OFF when the malfunction has not occurred after three ignition cycle.
- A history DTC will clear after 40 consecutive warm up cycles without a fault.
- Using a scan tool can clear history DTCs.

Diagnostic Aids

Steps 1-7:

Steps 9-12:

- When DTC P0711 sets, the possible cause of fault could be transmission fluid temperature sensor.