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Pinpoint Test

NOTE: If the scan tool is unable to communicate with the Powertrain Control Module (PCM) or access the transmission Parameter Identifications (PIDs), REFER to INTRODUCTION - GASOLINE MODELS .
  1. Read and record all Diagnostic Trouble Codes (DTCs)
    1. Install the scan tool and record all Diagnostic Trouble Codes (DTCs).
      • Were Diagnostic Trouble Codes (DTCs) P0720, P0721, P0722 and/or P0715 set? 
      1. Yes:  For Diagnostic Trouble Codes (DTCs) P0720, P0721 and P0722, GO to 2  on page 2.

        For Diagnostic Trouble Code (DTC) P0720 and P0715, GO to 7  on page 6.

      2. No:  REFER to SYMPTOM CHART: AUTOMATIC TRANSMISSION - 6F50 AND 6F55 .
  2. Check Output Shaft Speed (OSS) sensor signal circuit for an open
    1. Ignition OFF.
    2. Disconnect the transaxle vehicle harness C168.
    3. Disconnect the Powertrain Control Module (PCM) C175T.
    4. Inspect the connectors for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
    5. Measure the resistance of circuit RET04 (YE/OG) from the transaxle vehicle harness C168-10 to the Powertrain Control Module (PCM) C175T-25.
      Fig 1: Measuring Resistance Of Connector Terminals
      G07429831Courtesy of FORD MOTOR CO.
      • Is the resistance less than 5 ohms? 
      1. Yes:  GO to 3  on page 3.
      2. No:  REPAIR circuit RET04 (YE/OG) for an open. CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation.
  3. Check Output Shaft Speed (OSS) sensor signal circuit for a short to ground
    1. Measure the resistance of circuit RET04 (YE/OG) from the transaxle vehicle harness C168-10 to ground.
      Fig 2: Measuring Resistance Of Connector Terminals
      G07429832Courtesy of FORD MOTOR CO.
      • Is the resistance greater than 10,000 ohms? 
      1. Yes:  GO to 4  on page 3.
      2. No:  INSPECT and REPAIR circuit RET04 (YE/OG) for a short to ground. If a short to ground is not found, REPLACE the Powertrain Control Module (PCM). PROGRAM the Powertrain Control Module (PCM) with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy Download. TEST the system for normal operation.
  4. Check Output Shaft Speed (OSS) sensor signal circuit for a short to power
    1. Ignition ON.
    2. Measure for voltage between circuit RET04 (YE/OG) from the transaxle vehicle harness C168-10 to ground.
      Fig 3: Measuring Voltage Of Connector Terminals
      G07429833Courtesy of FORD MOTOR CO.
      • Is any voltage present? 
      1. Yes:  INSPECT and REPAIR circuit RET04 (YE/OG) for a short to power. If a short to power is not found, REPLACE the Powertrain Control Module (PCM). PROGRAM the Powertrain Control Module (PCM) with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy Download. TEST the system for normal operation.
      2. No:  GO to 5  on page 4.
  5. Check the Output Shaft Speed (OSS) sensor ground circuit
    1. Measure the voltage between circuit RET04 (YE/OG) from the transaxle vehicle harness C168-10 to the transaxle vehicle harness C168-9 circuit RET24 (BN/BU).
      Fig 4: Measuring Voltage Of Connector Terminals
      G07429834Courtesy of FORD MOTOR CO.
      • Is voltage less than 4.8 volts? 
      1. Yes:  INSPECT and REPAIR circuit RET24 (BN/BU) for an open. If an open circuit is not found, REPLACE the Powertrain Control Module (PCM). PROGRAM the Powertrain Control Module (PCM) with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy Download. TEST the system for normal operation.
      2. No:  GO to 6  on page 5.
  6. Check the solenoid body signal circuit for an open
    1. Remove the main control cover. REFER to MAIN CONTROL COVER .
    2. Disconnect the Output Shaft Speed (OSS) sensor.
    3. Measure the resistance between the transaxle internal harness connector, terminal 10 and the Output Shaft Speed (OSS) sensor connector terminal 1.
      Fig 5: Measuring Resistance Between Transaxle Internal Harness Connector, Terminal 10 And Output Shaft Speed Sensor Connector Terminal 1
      G07429835Courtesy of FORD MOTOR CO.
      • Is the resistance greater than 0.5 ohms? 
      1. Yes:  INSTALL a new solenoid body assembly. REFER to SOLENOID BODY ASSEMBLY . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy Download. TEST the system for normal operation.
      2. No:  INSTALL a new Output Shaft Speed (OSS) sensor. REFER to OUTPUT SHAFT SPEED (OSS) SENSOR .
  7. Check Output Shaft Speed (OSS) sensor VPWR circuit for an open
    1. Ignition OFF.
    2. Disconnect the transaxle vehicle harness C168.
    3. Inspect the connectors for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
    4. Ignition ON.
    5. Measure for voltage on circuit LE111 (VT/GN) from the transaxle vehicle harness C168-20 to ground.
      Fig 6: Measuring Voltage Of Connector Terminals
      G07429836Courtesy of FORD MOTOR CO.
      • Is the voltage less than 9.5 volts? 
      1. Yes:  INSPECT and REPAIR circuit LE111 (VT/GN) for an open. CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. If an open circuit is not found, REPLACE the Powertrain Control Module (PCM). PROGRAM the Powertrain Control Module (PCM) with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy Download. TEST the system for normal operation.
      2. No:  INSTALL a new solenoid body assembly. REFER to SOLENOID BODY ASSEMBLY . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy Download. TEST the system for normal operation.
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