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Pinpoint Test E: Turbine Shaft Speed (TSS), Intermediate Shaft Speed And Output Shaft Speed (OSS) Sensors

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to Transmission Connector Layouts .
  1. E1 ELECTRONIC DIAGNOSTICS 
    • Select PARK.
    • Key in OFF position.
    • Check to make sure the transmission harness connectors are fully seated, terminals are fully engaged in connector and in good condition before proceeding.
    • Connect the diagnostic tool.
    • Key in ON position.
    • Access the transmission PIDs.
    • Is the scan tool able to access the transmission PIDs? 
    1. YES  : Go to  E2.
    2. NO  : REPEAT procedure to access the transmission PIDs. If the scan tool did not access the transmission PIDs, REFER to the Introduction - Gasoline Engines for diagnosis of PCM.
  2. E2 DRIVE CYCLE TEST 
    • While monitoring the appropriate sensor PID, drive the vehicle so that the transmission upshifts and downshifts through all gears.
    • Does the TSS, intermediate shaft speed or OSS PID increase and decrease with engine and vehicle speed? 
    1. YES  : Go to  E3.
    2. NO  : If the TSS, intermediate shaft speed or OSS 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  E4.
  3. E3 DRIVE CYCLE TEST ERRATIC 
    • While monitoring the appropriate sensor PID, drive the vehicle so that the transmission upshifts and downshifts through all gears.
    • Is the TSS, intermediate shaft speed or OSS PID signal erratic (drop to zero or near zero and return to normal operation)? 
    1. YES  : If the sensor signal is erratic, INSPECT for intermittent concern in the harness, sensor or connector. Go to  E4.
    2. NO  : CLEAR all DTCs. RERUN OBD.
  4. E4 CHECK PCM HARNESS CIRCUITS FOR OPENS 
    • Key in OFF position.
    • Disconnect: PCM C175T
    • Inspect for damaged or pushed-out pins, corrosion or loose wires.
    • Lower the rear of the transmission to gain access to the sensors.
    • Disconnect: TSS Sensor C143
    • Disconnect: Intermediate Shaft Speed Sensor C164
    • Disconnect: OSS Sensor C193
      • Fig 1: Measuring Resistance Between PCM C175T-41, Circuit 359 (GY/RD) - OSS
      GF0015430Courtesy of FORD MOTOR CO.
    • For OSS, measure the resistance between PCM C175T-41, circuit 359 (GY/RD) harness side and the sensor C193-2, circuit 359 (GY/RD) harness side.
      • Fig 2: Measuring Resistance Between PCM C175T-41, Circuit 359 (GY/RD) - Intermediate Shaft Speed
      GF0015430Courtesy of FORD MOTOR CO.
    • For intermediate shaft speed, measure the resistance between PCM C175T-41, circuit 359 (GY/RD) harness side and the intermediate shaft speed sensor C164-2, circuit 359 (GY/RD) harness side.
      • Fig 3: Measuring Resistance Between PCM C175T-41, Circuit 359 (GY/RD) - TSS
      GF0015430Courtesy of FORD MOTOR CO.
    • For TSS, measure the resistance between PCM C175T-41, circuit 359 (GY/RD) harness side and the TSS sensor C143-2, circuit 359 (GY/RD) harness side.
      • Fig 4: Measuring Resistance Between C175T-4, Circuit 134 (GY/OG) Harness Side - Intermediate Shaft Speed
      GF0015431Courtesy of FORD MOTOR CO.
    • For intermediate shaft speed, measure the resistance between C175T-4, circuit 134 (GY/OG) harness side and the intermediate shaft speed sensor C164-1, circuit 134 (GY/OG) harness side.
      • Fig 5: Measuring Resistance Between C175T-15, Circuit 970 (DG/WH) Harness Side - TSS
      GF0015432Courtesy of FORD MOTOR CO.
    • For TSS, measure the resistance between C175T-15, circuit 970 (DG/WH) harness side and the TSS sensor C143-1, circuit 970 (DS/WH) harness side.
      • Fig 6: Measuring Resistance Between C175T-3, Circuit 136 (DB/YE) Harness Side - OSS
      GF0015433Courtesy of FORD MOTOR CO.
    • For OSS, measure the resistance between C175T-3, circuit 136 (DB/YE) harness side and the OSS sensor C193-1, circuit 136 (DB/YE) harness side.
    • Are all resistances less than 5 ohms? 
    1. YES  : Go to  E5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. E5 CHECK PCM HARNESS CIRCUITS FOR SHORT TO GROUND 
      Fig 7: Measuring Resistance Between C175T-3, Circuit 136 (DB/YE) Harness Side - OSS
      GF0015434Courtesy of FORD MOTOR CO.
    • For OSS, measure the resistance between C175T-3, circuit 136 (DB/YE) harness side and OSS sensor C193-1, circuit 136 (DB/YE) harness side and ground.
      • Fig 8: Measuring Resistance Between PCM C175T-4, Circuit 134 (GY/OG) Harness Side - Intermediate Shaft Speed
      GF0015435Courtesy of FORD MOTOR CO.
    • For intermediate shaft speed, measure the resistance between PCM C175T-4, circuit 134 (GY/OG) harness side and intermediate shaft speed sensor C164-1, circuit 134 (GY/OG) harness side and ground.
      • Fig 9: Measuring Resistance Between PCM C175T-15, Circuit 970 (DG/WH) Harness Side - TSS
      GF0015436Courtesy of FORD MOTOR CO.
    • For TSS, measure the resistance between PCM C175T-15, circuit 970 (DG/WH) harness side and TSS sensor C143-1, circuit 970 (DG/WH) harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  E6.
    2. NO  : REPAIR the circuits. TEST the system for normal operation. CLEAR DTCs. RERUN OBD Tests.
  6. E6 CHECK RESISTANCE OF TSS, INTERMEDIATE SHAFT SPEED OR OSS SENSOR 
      Fig 10: Checking Resistance Of TSS, Intermediate Shaft Speed Or OSS Sensor
      GF0015437Courtesy of FORD MOTOR CO.
    • Connect ohmmeter negative lead to one pin of the sensor and the positive lead to the other pin on the sensor.
    • Record the resistance. Resistance should be as follows:
      Resistance (ohms) Temperature
      266-390 -20°C (4°F)
      325-485 21°C (70°F)
      492-738 150°C (302°F)
    • Is the resistance within specification for the appropriate sensor? 
    1. YES  : Go to  E7.
    2. NO  : INSTALL a new sensor.
  7. E7 CHECK SENSORS FOR SHORT TO GROUND 
      Fig 11: Measuring Resistance Between Pin 1 And 2 Of Each Sensor And Ground
      GF0015438Courtesy of FORD MOTOR CO.
    • Measure the resistance between pin 1 and 2 of each sensor and ground.
    • Is the resistance less than 10,000 ohms? 
    1. YES  : INSTALL a new sensor.
    2. NO  : REFER to Diagnosis By Symptom  for diagnosis of shift or torque converter concerns.
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