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7A1–38 TRANSMISSION CONTROL SYSTEM (4L30–E) DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input D07RW029 Circuit Description The TFT sensor is a thermister that controls the signal ° C (212 ° F), the sensor resistance becomes less and the voltage decreases to Conditions For Setting The DTC D Battery voltage is between 10 and 16 volts. D Ignition is “on”. D TFT sensor indicating a voltage less than 0.4 volts. D All conditions met for 20 seconds. Action Taken When The DTC Sets D 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. D The PCM will not illuminate the CHECK TRANS Conditions For Clearing The DTC D The DTC can be cleared from the PCM history by D The DTC will be cleared from history when the vehicle D The PCM will cancel the DTC default actions when Diagnostic Aids D Check harness routing for a potential short to ground ° C (212 ° F), then stabilize. D Inspect the wiring for poor electrical connection at the D When diagnosing for a possible intermittent short or D The temperature to resistance value scale may be A “skewed” sensor could result in delayed garage D Verify customer driving habits, trailer towing, etc. Test Description The numbers below refer to the step numbers on the sensor. 3. This test checks for an internal fault within the transmission by creating an open. |