Pinpoint Test G: Turbine Shaft Speed (TSS) Sensor
- G1 ELECTRONIC DIAGNOSTICS SETUP
- Check to make sure the transaxle harness connectors are fully seated, terminals 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: TCM.
- Select Trans Priority.
- Select PID/Data Monitor and Record.
- Select the TSS PID.
- Does vehicle enter PID/Data Monitor and Record?
Yes : REMAIN in PID/Data. GO to G2.
No : REPEAT procedure to ENTER PID. If vehicle did not enter PID, REFER to the INTRODUCTION - GASOLINE article for diagnosis of TCM.
- G2 DRIVE CYCLE TEST
- While monitoring the appropriate sensor PID, drive the vehicle so that the transaxle upshifts and downshifts through all gears.
- Does the TSS Speed PID increase and decrease with engine and vehicle speed?
Yes : GO to G3.
No : If the TSS or OSS 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. GO to G4.
- G3 DRIVE CYCLE TEST ERRATIC
- While monitoring the appropriate sensor PID, drive the vehicle so that the transaxle upshifts and downshifts through all gears.
- Is the TSS Speed PID signal erratic (drop to zero or near zero and return to normal operation)?
Yes : If the sensor signal is erratic, INSPECT for intermittent concern in the harness, sensor, or connector. GO to G4.
No : CLEAR all DTCs. Rerun OBD.
- G4 CHECK TRANSMISSION CONTROL MODULE AND HARNESS FOR POWER
- Key in OFF position.
- Disconnect: TSS Sensor Connector C143.
- Key in ON position.
- Measure the voltage between TSS sensor C143-1, harness side and ground; and between TSS sensor C143-2, harness side and ground.
- Is voltage present?
Yes : GO to G5.
No : GO to G6.
- G5 CHECK HARNESS FOR A SHORT TO POWER
- Key in OFF position.
- Disconnect: TCM Connector C2352b.
- Key in ON position.
- Measure the voltage between TSS sensor connector pin 1, harness side and ground; and between TSS sensor connector pin 2, harness side and ground.
- Is voltage present?
Yes : REPAIR the circuit in question. TEST the system for normal operation.
No : INSTALL a new PCM. TEST the system for normal operation.
- G6 CHECK TRANSMISSION CONTROL MODULE AND HARNESS FOR GROUND
- Key in OFF position.
- Connect: TCM C2352b.
- Measure the resistance between TSS sensor C143-1, harness side and ground; and between TSS sensor C143-2, harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes : GO to G8.
No : GO to G7.
- G7 CHECK HARNESS FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: TCM Connector C2352b.
- Measure the resistance between TSS sensor C145-1, harness side and ground; and between TSS sensor C145-2, harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes : INSTALL a new PCM. TEST the system for normal operation.
No : REPAIR the circuit in question. TEST the system for normal operation.
- G8 CHECK RESISTANCE OF TSS SENSOR
- Measure the resistance between TSS sensor C143-1, component side and TSS sensor C143-2, component side.
- Record the resistance. Resistance should be as follows:
- 273-333 ohms at -20°C (-4°F)
- 330-390 ohms at 21°C (70°F)
- 487-601 ohms at 160°C (302°F)
- Are the resistances within specification?
Yes : GO to G9.
No : INSTALL a new sensor. TEST the system for normal operation.
- G9 CHECK SENSOR FOR A SHORT TO GROUND
- Measure the resistance between TSS sensor C143-1, component side and ground.
- Is the resistance greater than 10,000 ohms?
Yes : INSTALL a new TSS sensor. TEST the system for normal operation.
No : REFER to DIAGNOSIS BY SYMPTOM for diagnosis of shift or torque converter concerns.