Pinpoint Test F: Turbine Shaft Speed (TSS) Sensors
WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Refer to the TURBINE SHAFT SPEED (TSS) SENSOR HARNESS CONNECTOR illustration preceding these pinpoint tests.
- F1 ELECTRONIC DIAGNOSTICS
- Check to make sure the transmission harness connector is fully seated, pins are fully engaged in connector and in good condition before proceeding.
- Connect the scan tool.
- Key in ON position.
- Enter the following diagnostic mode on the scan tool: Diagnostic Data Link.
- Enter the following diagnostic mode on the scan tool: PCM.
- Select PID/Data Monitor and Record.
- Select the PID TSS.
- Does vehicle enter PID/Data Monitor and Record?
- Yes : GO to F2.
- No : REPEAT procedure to ENTER PID. If vehicle did not enter PID, See INTRODUCTION - GASOLINE and/or INTRODUCTION -- 6.0L DIESEL articles for diagnosis of PCM.
- F2 DRIVE CYCLE TEST
- While monitoring the TSS Speed PID, drive the vehicle so that the transmission upshifts and downshifts through all gears.
- Does the TSS Speed PID increase and decrease with engine and vehicle speed?
- Yes : CLEAR all DTCs. ROAD TEST to verify if concern is still present. If concern is still present, REFER to DIAGNOSIS BY SYMPTOM .
- No : If the TSS Speed PID does not increase and decrease with engine and vehicle speed, INSPECT for open or short in vehicle harness, sensor, a PCM concern, or internal hardware concern.
If the sensor signal is erratic, INSPECT for intermittent concern in the internal/external harness, sensor, or connector.
If the sensor signal is steady, GO to F3.
- F3 CHECK RESISTANCE OF TSS SENSOR
- Disconnect the vehicle harness connector from the TSS sensor.
- Measure the resistance between the TSS sensor pins.
- Record the resistance.
- Is the resistance within 480-590 ohms?
- Yes : REFER to DIAGNOSIS BY SYMPTOM for concern diagnosis.
- No : INSTALL a new TSS sensor.