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 .

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) P0715, P0717, P0718 and/or P0720 set?
  1. Yes: For Diagnostic Trouble Codes (DTCs) P0715, P0717 and P0718, GO to 2 on page 2.
    For Diagnostic Trouble Code (DTC) P0715 and P0720, GO to 7 on page 6.
  2. No: REFER to SYMPTOM CHART: AUTOMATIC TRANSMISSION - 6F50 AND 6F55 .
Check Turbine Shaft Speed (TSS) 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 RET33 (WH/VT) from the transaxle vehicle harness C168-19 to Powertrain Control Module (PCM) C175T-16.
  
  Fig 1: Measuring Resistance Between Transaxle Vehicle Harness C168-19 And Powertrain Control Module Connector Terminals
  Courtesy of FORD MOTOR CO.
  - Is the resistance less than 5 ohms?
  1. Yes: GO to 3 on page 3.
  2. No: REPAIR circuit RET33 (WH/VT) for an open. CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation.
Check Turbine Shaft Speed (TSS) sensor signal circuit for a short to ground
1. Measure the resistance of circuit RET33 (WH/VT) from the transaxle vehicle harness C168-19 to ground.
  
  Fig 2: Measuring Resistance Transaxle Vehicle Harness Connector Terminal Identification
  Courtesy 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 RET33 (WH/VT) 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.
Check Turbine Shaft Speed (TSS) sensor signal circuit for a short to power
1. Ignition ON.
2. Measure for voltage between circuit RET33 (WH/VT) from the transaxle vehicle harness C168-19 to ground.
  
  Fig 3: Measuring Voltage Between Transaxle Vehicle Harness And Ground Connector End View
  Courtesy of FORD MOTOR CO.
  - Is any voltage present?
  1. Yes: INSPECT and REPAIR circuit RET33 (WH/VT) 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.
Check the Turbine Shaft Speed (TSS) sensor ground circuit
1. Measure the voltage between circuit RET33 (WH/VT) from the transaxle vehicle harness C168-19 to the transaxle vehicle harness C168-9 circuit RET24 (BN/BU).
  
  Fig 4: Measuring Voltage Transaxle Vehicle Harness Connector Terminals
  Courtesy 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.
Check the solenoid body signal circuit for an open
1. Remove the main control cover. REFER to MAIN CONTROL COVER .
2. Disconnect the Turbine Shaft Speed (TSS) sensor.
3. Measure the resistance between the transaxle internal harness connector, terminal 19 and the Turbine Shaft Speed (TSS) sensor connector terminal 3.
  
  Fig 5: Measuring Resistance Between Transaxle Internal Harness Connector And Turbine Shaft Speed (TSS) Sensor Connector Terminal 3
  Courtesy 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 Turbine Shaft Speed (TSS) sensor. REFER to TURBINE SHAFT SPEED (TSS) SENSOR .
Check Turbine Shaft Speed (TSS) 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 Between Transaxle Vehicle Harness And Ground Connector Terminals
  Courtesy 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.