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Pinpoint Test D: TSS Sensor

WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the Transmission Vehicle Harness  Connector illustration within the Transmission Connector Layouts  procedure .
NOTE: Refer to the Transmission Leadframe Connector  illustration within the Transmission Connector Layouts  procedure .
NOTE: If the scan tool is unable to access the transmission PIDs, refer to INTRODUCTION - GASOLINE MODELS .
NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws.
NOTE: Read and record all DTCs.
NOTE: If DTCs P0705, P0706, P0707, P0708, P0709, P1702, P1705 and/or P1921 are set, diagnose those DTCs first.
  1. D1 DRIVE CYCLE TEST 
    • Connect the scan tool.
    • Enter the following diagnostic mode on the scan tool: TSS PID: TSS_SRC.
    • Monitor the TSS_SRC 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? 
  2. D2 CHECK TSS SENSOR SIGNAL CIRCUIT FOR POWER 
    • Ignition OFF.
    • Disconnect: Transmission Vehicle Harness C1575.
    • Ignition ON.
    • Measure the voltage between the transmission vehicle harness C1575-1 and ground.
      Fig 1: Measuring Voltage Between Transmission Vehicle Harness C1575-1 And Ground
      G07962414Courtesy of FORD MOTOR CO.
    • Is the voltage less than 4.8 volts? 
      • Yes  : GO to D3.
      • No  : GO to  D6.
  3. D3 CHECK THE TSS SENSOR SIGNAL CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: PCM C175T.
    • Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
    • Vehicles equipped with a 3.7L engine, measure the resistance between the transmission vehicle harness C1575-1 circuit VET33 (WH/OG) and PCM C175T-16.
      Fig 2: Measuring Resistance Between Transmission Vehicle Harness C1575-1 Circuit VET33 (WH/OG) And PCM C175T-16
      G07962415Courtesy of FORD MOTOR CO.
    • Disconnect: PCM C1381T.
    • Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
    • Vehicles equipped with a 5.0L or 6.2L engine, measure the resistance between the transmission vehicle harness C1575-1 circuit VET33 (WH/OG) and PCM C1381T-1.
      Fig 3: Measuring Resistance Between Transmission Vehicle Harness C1575-1 Circuit VET33 (WH/OG) And PCM C1381T-1
      G07962416Courtesy of FORD MOTOR CO.
    • Disconnect: PCM C1551E.
    • Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
    • Vehicles equipped with a 3.5L engine, measure the resistance between the transmission vehicle harness C1575-1 circuit RET33 (WH/VT) and PCM C1551E-27.
      Fig 4: Measuring Resistance Between Transmission Vehicle Harness C1575-1 Circuit RET33 (WH/VT) And PCM C1551E-27
      G07962417Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      • Yes  : GO to D4.
      • No  : INSPECT and REPAIR transmission vehicle harness TSS signal circuit for an open. If an open circuit is not found, REPLACE the PCM, REFER to ELECTRONIC ENGINE CONTROLS . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy  . TEST the system for normal operation.
  4. D4 CHECK THE TSS SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between the transmission vehicle harness C1575-1 and ground.
      Fig 5: Measuring Resistance Between Transmission Vehicle Harness C1575-1 And Ground
      G07962418Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
      • Yes  : GO to D5.
      • No  : INSPECT and REPAIR transmission vehicle harness TSS signal circuit for a short to ground. If a short to ground is not found, REPLACE the PCM, REFER to ELECTRONIC ENGINE CONTROLS . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy  . TEST the system for normal operation.
  5. D5 CHECK THE TSS SENSOR SIGNAL CIRCUIT FOR A SHORT TO POWER 
    • Connect: PCM C175T.
    • Connect: PCM C1381T.
    • Connect: PCM C1551E.
    • Ignition ON.
    • Measure for voltage between the transmission vehicle harness C1575-1, and ground.
      Fig 6: Measuring Voltage Between Transmission Vehicle Harness C1575-1, And Ground
      G07962414Courtesy of FORD MOTOR CO.
    • Is voltage greater than 5.1 volts? 
      • Yes  : INSPECT and REPAIR transmission vehicle harness TSS signal circuit for a short to power. If a short to power is not found, REPLACE the PCM, REFER to ELECTRONIC ENGINE CONTROLS . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy  . TEST the system for normal operation.
      • No  : GO to D6.
  6. D6 CHECK THE TSS SENSOR GROUND CIRCUIT 
    • Measure the voltage between the transmission vehicle harness C1575-1 and C1575-5.
      Fig 7: Measuring Voltage Between Transmission Vehicle Harness C1575-1 And C1575-5
      G07962420Courtesy of FORD MOTOR CO.
    • Is voltage less than 4.8 volts? 
      • Yes  : REPAIR the transmission vehicle harness signal return circuit for an open. If an open is not found, REPLACE the PCM, REFER to ELECTRONIC ENGINE CONTROLS . PROGRAM the PCM with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy  . TEST the system for normal operation.
      • No  : REPLACE the molded leadframe, REFER to Shift Solenoids (SS)  . CLEAR the DTCs. TEST the system for normal operation.
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