• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
TFT Sensor Signal | P0712 | P0713 | P0713¹ | -- |
Low Reference | -- | P0713 | P0713¹ | -- |
¹Internal ECM damage may occur if the circuit is shorted to B+. |
The transmission fluid temperature (TFT) sensor is a variable resistor that measures the temperature of the transmission fluid. The engine control module (ECM) supplies 5 V to the TFT signal circuit and supplies a ground to the low reference circuit.
The following table illustrates the difference between temperature, resistance, and voltage:
TFT | TFT Resistance | TFT Signal Voltage |
---|---|---|
Cold | High | High |
Warm | Low | Low |
• | The engine speed is above 1,000 RPM for 7 seconds. |
• | This DTC runs continuously when the above condition is met. |
• | The engine speed is above 1,000 RPM for 7 seconds. |
• | This DTC runs continuously when the above condition is met. |
The TFT is greater than 145°C (299°F) for more than 5 seconds.
The TFT is less than -35°C (-31°F) for more than 5 seconds.
DTC P0712 and P0713 are Type C DTCs.
DTC P0712 and P0713 are Type C DTCs.
Manual Transmission Schematics
Manual Transmission Description and Operation
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Engine Control Module Scan Tool Information
⇒ | If greater than 5 ohms, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If greater than -40°C (-40°F), test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the ECM. |
Note: If the signal circuit of the TFT sensor is shorted to voltage the TFT sensor may be damaged.
⇒ | If less than 128°C (262°F), test the signal circuit of the TFT sensor for a short to voltage or an open/high resistance. If the circuit test normal, replace the ECM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.