Pinpoint Test G: TSS Sensor
Pinpoint Tests - OSC Equipped Vehicle
PINPOINT TEST G: TSS SENSOR
NOTE: Refer to the Turbine Shaft Speed (TSS) Sensor Connector illustrations Transaxle Connector Layouts Transaxle Connector Layouts.
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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.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger Mode.
- Select TSS PID.
- Does vehicle enter DataLogger Mode?
Yes
REMAIN in DataLogger Mode. GO to G2 .
No
REPEAT procedure to enter DataLogger Mode. If vehicle did not enter DataLogger Mode, REFER to Computers and Control Systems Information for diagnosis of the Transmission Control Module (TCM).
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G2 DRIVE CYCLE TEST
- Start the engine.
- While monitoring the TSS PID, drive the vehicle so that the transaxle upshifts and downshifts through all gears.
- Does the TSS PID speed increase and decrease with engine and vehicle speed?
Yes
GO to G3.
No
If the TSS PID speed does not increase and decrease with engine and vehicle speed, INSPECT for open or short in vehicle harness, sensor, a TCM concern or internal hardware concern. GO to G4 .
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G3 DRIVE CYCLE TEST ERRATIC
- While monitoring the TSS PID, drive the vehicle so that the transaxle upshifts and downshifts through all gears.
- Is the TSS PID speed 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 On-Board Diagnostic (OBD).
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G4 CHECK THE HARNESS FOR A SHORT TO POWER
- Ignition OFF.
- Disconnect: Turbine Shaft Speed (TSS) Sensor C143.
- Disconnect: TCM C2352B.
- Ignition ON.
- Measure the voltage between TSS sensor C143-1, circuit VET33 (WH/OG) and ground.
- Measure the voltage between TSS sensor C143-2, circuit RET33 (WH/VT) and ground.
- Is any voltage present?
Yes
REPAIR the circuit for a short to power. TEST the system for normal operation.
No
GO to G5.
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G5 CHECK THE TCM AND HARNESS FOR GROUND
- Ignition OFF.
- Connect: TCM C2352B.
- Measure the resistance between TSS sensor C143-1, circuit VET33 (WH/OG) and ground.
- Measure the resistance between TSS sensor C143-2, circuit RET33 (WH/VT) and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to G7.
No
GO to G6.
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G6 CHECK THE HARNESS FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: TCM C2352B.
- Measure the resistance between TSS sensor C143-1, circuit VET33 (WH/OG) and ground.
- Measure the resistance between TSS sensor C143-2, circuit RET33 (WH/VT) and ground.
- Are the resistances greater than 10,000 ohms?
Yes
INSTALL a new TCM. TEST the system for normal operation.
No
REPAIR the circuit for a short to ground. TEST the system for normal operation.
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G7 CHECK THE RESISTANCE OF THE TSS SENSOR
- Measure the resistance between TSS sensor C143 pin 1, component side and TSS sensor C143 pin 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 G8.
No
INSTALL a new sensor. TEST the system for normal operation.
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G8 CHECK THE SENSOR FOR A SHORT TO GROUND
- Measure the resistance between TSS sensor C143 pin 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 Diagnosis By Symptom for diagnosis of shift or torque converter concerns.
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