Pinpoint Test B : TFT (Transmission Fluid Temperature) Sensor: Notes
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Wiring Diagram for schematic and connector information.
Normal Operation and Fault Conditions
The TFT sensor is a temperature dependent resistor that is in contact with transmission fluid in the transmission sump area. The TCM monitors the voltage across the TFT sensor, which changes as transmission fluid temperature varies. The TCM uses the TFT sensor signal as an input for its strategy for shifting and TCC operation. The TCM also uses the TFT sensor signal for transmission fault detection and diagnostics.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| TCM P0710:00 | Transmission Fluid Temperature Sensor "A" Circuit: No Sub Type Information | This DTC sets if the fault was not present long enough for the TCM to determine a more specific fault. If a more specific DTCs such as P0712 or P0713 are set resolve them first. |
| TCM P0711:00 | Transmission Fluid Temperature Sensor "A" Circuit Range/Performance: No Sub Type Information | This DTC sets if the TCM detects no change (failed to change by at least 8 degrees F) in the TFT sensor when the vehicle was driven enough that TFT should have changed. |
| TCM P0712:00 | Transmission Fluid Temperature Sensor "A" Circuit Low: No Sub Type Information | This DTC sets if the TCM detects a short to ground in the TFT circuitry. |
| TCM P0713:00 | Transmission Fluid Temperature Sensor "A" Circuit High: No Sub Type Information | This DTC sets if the TCM detects an open in the TFT circuitry. |
Possible Sources
Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
TFT sensor
Transmission main control harness
TCM