Pinpoint Test K : TSS (Turbine Shaft Speed) Sensor

WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.

Refer to OEM WIRING DIAGRAMS 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 Condition
PCM P0715:00	Input/Turbine Shaft Speed Sensor "A" Circuit: No Sub Type Information	No input from the TSS sensor.
PCM P0717:00	Input/Turbine Shaft Speed Sensor "A" Circuit No Signal: No Sub Type Information	No input from the TSS sensor.
PCM P0718:00	Input/Turbine Shaft Speed Sensor "A" Circuit Intermittent: No Sub Type Information	Unrealistic change in the 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

K1 RETRIEVE AND RECORD ALL DTCS
- Using the diagnostic scan tool, retrieve all DTCs.
Are DTCs P0715, P0717, P0718 and/or P0720 present?

Yes For DTCs P0715, P0717 and P0718, GO to K2 For DTCs P0715 and P0720, GO to K6

No REFER to: Diagnosis By Symptom .

K2 CHECK THE TSS (TURBINE SHAFT SPEED) SENSOR SIGNAL CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect Transmission Vehicle Harness C143.

Disconnect PCM C1232E.

Inspect the connectors for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C143-2	Courtesy of FORD MOTOR COMPANY	C1232E-27

Is the resistance less than 3 ohms?

Yes

GO to K3

No	REPAIR the circuit.

K3 CHECK THE TSS (TURBINE SHAFT SPEED) SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C143-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to K4

No	REPAIR the circuit.

K4 CHECK THE TSS (TURBINE SHAFT SPEED) SENSOR SIGNAL CIRCUIT FOR A SHORT TO POWER

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C143-2	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to K5

K5 CHECK THE TSS (TURBINE SHAFT SPEED) SENSOR GROUND CIRCUIT

Ignition OFF.

Connect PCM C1232E.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C143-3	Courtesy of FORD MOTOR COMPANY	C143-1

Is voltage less than 4.8 volts?

Yes	INSPECT and REPAIR the circuit. If an open circuit is not found, Refer to PCM GUIDED ROUTINE TESTING

No	INSTALL a new TSS. REFER to: Turbine Shaft Speed (TSS) Sensor .

K6 CHECK THE TSS (TURBINE SHAFT SPEED) SENSOR VEHICLE POWER CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect Transmission Vehicle Harness C1520B.

Inspect the connectors for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C143-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage less than 9.5 volts?

Yes	INSPECT and REPAIR the circuit. If an open circuit is not found, Refer to PCM GUIDED ROUTINE TESTING

No	CLEAR the DTC. If DTCs P0715 and/or P0720 return, Refer to PCM GUIDED ROUTINE TESTING