Pinpoint Test K : Turbine Shaft Speed Sensor: Notes
Diagnostic Overview
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices.
Refer to Transmission Controls - 6F50/6F55 for schematic and connector information.
Normal Operation and Fault Conditions
The TSS sensor is a Hall-effect sensor that sends a signal to the PCM that indicates transmission turbine shaft input speed. The TSS sensor provides converter turbine speed information for TCC strategy.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0715 | Turbine/Input Shaft Speed Sensor "A" Circuit | No input from TSS sensor. |
| P0717 | Turbine/Input Shaft Speed Sensor "A" Circuit No Signal | No input from TSS sensor. |
| P0718 | Turbine/Input Shaft Speed Sensor "A" Circuit Intermittent | Unrealistic change in TSS sensor signal, erratic or intermittently no input. |
Possible Sources
- Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
- TSS Sensor
- PCM