P0711

DTC P0711

Circuit Description
The automatic transmission fluid temperature (TFT) sensor is a thermistor. The powertrain control module (PCM) supplies a 5 volt reference signal to the sensor. When the transmission fluid is cold, the sensor resistance is high and the PCM senses a high signal voltage. As the transmission fluid warms, the sensor resistance lowers and the PCM senses lower voltage. The PCM uses the TFT reading in order to control the torque converter clutch (TCC), line pressure adjustments, and temperature compensated shifts. When the PCM detects no voltage change in the TFT sensor circuit, DTC P0711 sets. DTC P0711 is a type C DTC.

Conditions for Running the DTC
The following conditions must be met for 5 minutes or greater.

Case 1 - Temperature Stuck Low
- No ECT DTC P0116, P0117, or P0118.
- No VSS DTCs P0501 or P0502.
- No TFT DTCs P0712 or P0713.
- The system voltage is 11 volts or greater.
- ECT is less than 350C (950F) at engine start-up, then ECT is greater than 70°C (158°F).
- TFT at engine start-up is -20°C (-4°F) or below: TFT does not exceed -20°C (-4°F) with all the enable conditions are met.
- TFT at engine start-up is -20°C (-4°F) or more: TFT does not change more than 5°C (9°F) with all the enable conditions are met.
- The vehicle speed is 30 km/h (19 mph) or greater.
- The APP angle is 10% or greater.

Case 2 - Temperature Stuck High
- No ECT DTC P01 16, P01 17, or P0118.
- No VSS DTCs P0501 or P0502.
- No TFT DTCs P0712 or P0713.
- The system voltage is 11 volts or greater.
- ECT is greater than 70°C (158°F) at last ignition, 35°C (95°F) or less at engine start-up, then ECT is greater than 70°C (158°F).
- TFT is 110°C (230°F) or greater at last ignition and at engine start-up, for 20 seconds.

Conditions for Setting the DTC
Case 1
The change in TFT is less than 5°C (9°F) since start-up, for 5 minutes after the conditions for running the DTC are met.
Case 2
The change in TFT is less than 5°C (9°F) since start-up, for 20 seconds after the conditions for running the DTC are met.

Action Taken When the DTC Sets
- The PCM does not illuminate the malfunction indicator lamp (MIL).
- The PCM illuminates the SVS Lamp.
- The PCM ignores the input from TFT sensor and uses the default values. The PCM records the operating conditions when the Conditions for Setting the DTC are met.
- The PCM stores this information as Failure Records. The PCM stores DTC P0711 in PCM history.

Conditions for Clearing the SVS Lamp/DTC:
- The PCM turns OFF the SVS lamp when the condition no longer exists.
- A scan tool can clear the SVS lamp DTC.
- The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.

Diagnostic Aids
- Inspect the connectors at the PCM, the TIFT sensor, and all other circuit connecting points for an intermittent condition.
- Inspect the circuit wiring for an intermittent condition.
- Inspect for a shorted TIFT sensor wire.
- Inspect for a faulty TIFT sensor.
- Inspect for an internal fault of the PCM.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
5. This step tests for an intermittent short or open condition in the engine wiring harness. The test light is used as a resistor in the circuit.
6. This step determines if the PCM or the TFT sensor is causing a steady, unchanging TFT reading.

Steps 1 - 4:

Steps 5 - 8:

DTC P0711