Pinpoint Test D: TSS Sensor
Pinpoint Tests - TorqShift(R)6
PINPOINT TEST D: TSS SENSOR
NOTE: If the scan tool is unable to access the transmission PIDs, REFER to Computers and Control Systems.
NOTE: If DTCs P0706, P0707, P0708, P1702 and/or P1921 are set, diagnose those DTCs first.
NOTE: Read and record all DTCs.
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D1 DRIVE CYCLE TEST
- Enter the following diagnostic mode on the scan tool: TSS PID: TSS_SRC.
- Monitor the Turbine Shaft Speed (TSS) sensor PID while road testing the vehicle. Drive the vehicle so the transmission upshifts and downshifts through all the gears.
- Does the TSS sensor rpm increase and decrease with engine rpm and vehicle speed?
Yes
REFER to Shift Point Road Test Initial Inspection and Diagnostic Overview for further diagnosis.
No
GO to D2.
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D2 CHECK THE TSS SIGNAL CIRCUIT FOR AN OPEN
- Disconnect: Transmission C1623.
- Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
- Disconnect: PCM C175T.
- Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
- Measure the resistance between the transmission vehicle harness C1623-11 circuit VET33 (WH/OG) and the PCM C175T-1.
- Is the resistance less than 5 ohms?
Yes
GO to D3.
No
REPAIR the TSS signal circuit VET33 (WH/OG) for an open. CLEAR the DTCs. TEST the system for normal operation.
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D3 CHECK THE TSS SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between the PCM C175T-1 circuit VET33 (WH/OG) and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to D4.
No
REPAIR the TSS signal circuit VET33 (WH/OG) for a short to ground. CLEAR the DTCs. TEST the system for normal operation.
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D4 CHECK THE TSS SIGNAL CIRCUIT FOR A SHORT TO POWER
- Ignition ON.
- Check for voltage between the PCM C175T-1 circuit VET33 (WH/OG) and ground.
- Is any voltage present?
Yes
REPAIR the TSS signal circuit VET33 (WH/OG) for a short to voltage. CLEAR the DTCs. TEST the system for normal operation.
No
GO to D5.
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D5 CHECK THE TSS SIGNAL CIRCUIT FOR POWER
- Ignition OFF.
- Connect: PCM C175T.
- Ignition ON.
- Check for voltage between the transmission vehicle harness C1623-11 circuit VET33 (WH/OG) and ground.
- Is voltage greater than 4.6 volts?
Yes
GO to D6.
No
REPLACE the PCM. PROGRAM the PCM with the latest calibration level. PERFORM the solenoid strategy download procedure. REFER to Solenoid Body Strategy Solenoid Body Strategy - TorqShift(R)6. TEST the system for normal operation.
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D6 CHECK THE TSS INTERNAL HARNESS FOR AN OPEN
- Remove the transmission fluid pan.
- Disconnect: 3-way TSS sensor connector.
- Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
- Measure the resistance of the TSS sensor circuits between C1623 and the 3-way TSS sensor connector component side, using the following chart.
- Is the resistance less than 5 ohms?
Yes
GO to D7.
No
REPLACE the transmission internal harness. CLEAR the DTCs. TEST the system for normal operation.
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D7 CHECK THE TSS INTERNAL HARNESS FOR A SHORT TO GROUND
- Measure the resistance of the TSS sensor circuits between C1623 and ground using the following chart.
- Is the resistance greater than 10,000 ohms?
Yes
REPLACE the TSS sensor.
No
REPLACE the transmission internal harness. CLEAR the DTCs. TEST the system for normal operation. If DTCs P0715, P0717 and/or P0718 return, REPLACE the PCM. PROGRAM the PCM with the latest calibration level. PERFORM the solenoid strategy download procedure. REFER to Solenoid Body Strategy Solenoid Body Strategy - TorqShift(R)6. TEST the system for normal operation.
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