P0711

Circuit Description
The TFT sensor is a thermistor that controls the signal voltage to the PCM. The PCM supplies a 5 volt reference signal to the sensor on circuit GRN/RED. When the transmission fluid is cold, the sensor resistance is high and the PCM detects high signal voltage. As the transmission fluid temperature increases to normal operating temperature of 100°C (212°F), the sensor resistance becomes less and the voltage decreases to 1.5 to 2 volts.
When the PCM detects a TFT sensor that remains at the startup value, or a sensor that has a change delta of greater than 20°C (36°F) less than 1 second, DTC P0711. sets. DTC P0711 is a type D.

Conditions For Setting The DTC
- No VSS DTCs P0722 or P0723.
- No Transmission Component Slipping DTC P1870.
- Engine running.
- TFT is between 20 A/D (Analog/Digital) counts and 248 A/D counts.
- TFT is between-40°C (-40°F) and +21°C (69.8°F) at engine startup.
- Engine coolant temperature is greater than 70°C (150°F).
- Engine coolant temperature has changed by greater than 50°C (90°F) since engine startup.
- Vehicle speed has been greater than 5 mph for greater than 410 seconds since engine startup (cumulative timer).
- TCC slip speed has been greater than 120 rpm for greater than 410 seconds since engine startup (cumulative timer).
- Battery voltage is between 10 and 16 volts.

All of the above is true and either of the following occurs:
- If the sensor is stuck, the TFT has not changed for greater than 2 counts (from startup temperature) for greater than 410 seconds.
- If the sensor shows an unrealistic change, the TFT exhibits a change delta of greater than 20°C (36°F), greater than 14 times in 7 seconds.

Action Taken When The DTC Sets
- Transmission default temperature will be:
80°C (176°F) if engine temperature code is set.
100°C (212°F) if engine temperature is warm.
80°C (176°F) if engine run time is greater than 5 minutes.
21°C (69.8°F) if engine run time is less than 5 minutes.
- The PCM will not illuminate the Malfunction Indicator Lamp (MIL).

Conditions For Clearing The DTC
- The DTC can be cleared from the PCM history by using a scan tool.
- The DTC will be cleared from history when the vehicle has achieved 40 warmup cycles without a failure reported.
- The PCM will cancel the DTC default actions when the fault no longer exists and the ignition is cycled "off' long enough to power down the PCM.

Diagnostic Aids
- Inspect the wiring for poor electrical connection at the PCM. Inspect the wiring for poor electrical connections at the transmission 16-way connector H-10. Look for the following conditions:
a. A bent terminal
b. A backed out terminal
c. A damaged terminal
d. Poor terminal tension
e. A chafed wire
f. A broken wire inside the insulation
- When diagnosing for an intermittent short or open connection, move the wiring harness while watching the test equipment for a change.
- First diagnose and clear any engine DTCs or TP Sensor codes. Then inspect for any transmission DTCs that may have reset.





Resistance Chart

Test Description
The number below refers to the step number on the diagnostic chart:
3. This test checks PCM and associated wiring up to the 16-way connector H-10. If the voltage increases to match chart the problem is isolated to the transmission wiring.








DTC P0711 Transmission Fluid Temperature (TFT) Sensor Circuit Range/performance