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Pinpoint Test A: Shift And Torque Converter Clutch Solenoids

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Read and record all DTCs. All digital transmission range (TR) sensor and vehicle speed sensor (VSS) DTCs must be repaired before entering output state control (OSC).
NOTE: Refer to the Transmission Internal Harness Connector illustration in Transmission Connector Layouts .
NOTE: Refer to the Transmission Vehicle Harness Connector illustration in Transmission Connector Layouts .
  1. A1 ELECTRONIC DIAGNOSTICS 
      WARNING: If equipped with fire suppression system, depower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM article.
    • Vehicle in PARK.
    • Key in OFF position.
    • Check to make sure the transmission harness connector is fully seated, pins 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  A2.
    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 article for diagnosis of PCM. If equipped with fire suppression system, go to  A10.
  2. A2 WIGGLE TEST 
    • Select PIDs to be monitored.
      PID
      SSA/SS1_F
      SSB/SS2_F
      TCC/TCC_F
    • Select ON to turn suspect solenoid on.
    • Wiggle all wiring and connectors to the transmission. Monitor the solenoid state for changes.
    • Select OFF to turn solenoid off.
    • Press SEND.
    • Does the suspect solenoid(s) fault state change? 
    1. YES  : REPAIR open or short in the vehicle harness or connector. If equipped with a fire suppression system, go to  A10.
    2. NO  : Go to  A3.
  3. A3 SOLENOID FUNCTIONAL CHECK 
    • Monitor each solenoid state.
    • Turn each solenoid ON and OFF.
    • Does the solenoid turn ON and OFF when commanded and can solenoid activation be heard? 
    1. YES  : Go to  A4.
    2. NO  : Go to  A5.
  4. A4 VERIFY SHIFT OR TORQUE CONVERTER CLUTCH (TCC) SOLENOID OPERATION 
    • Using the scan tool, select the SSA/SS1#, SSB/SS2# and/or TCC# solenoid.
    • While driving the vehicle, maintain speed at 48 km/h (30 mph).
    • Command the selected solenoid ON and OFF.
    • Repeat steps for remaining solenoids as needed.
    • Does the transmission upshift/downshift or TCC engage/disengage when commanded? 
    1. YES  : CLEAR all DTCs. ROAD TEST to verify if concern is still present. If concern is still present, REFER to Diagnosis by Symptom to diagnose shift or torque converter concern. If equipped with a fire suppression system, go to  A10.
    2. NO  : Go to  A5.
  5. A5 CHECK FOR BATTERY VOLTAGE 
    • Remove transmission fluid pan.
    • Visually inspect the lead frame and connectors for damage.
    • Key in ON position.
      • Fig 1: Measuring Voltage
      GF0003434Courtesy of FORD MOTOR CO.
    • Measure the voltage with the positive lead to VPWR solenoid pin and negative lead to a good ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  A6.
    2. NO  : CHECK for open or short circuit in harness or solenoid. If equipped with a fire suppression system, go to  A10.
  6. A6 ELECTRICAL SIGNAL CHECK 
      Fig 2: Measuring Voltage
      GF0003435Courtesy of FORD MOTOR CO.
    • Measure the voltage with the positive lead connected to VPWR solenoid pin and the negative lead to the signal pin of the appropriate solenoid.
    • Access the transmission PIDs.
    • Select SSA/SS1#, SSB/SS2#.
    • Turn the solenoids ON and OFF, while monitoring the voltmeter, and solenoid state on the scan tool (ON and OFF), and listen for the solenoid to activate (click).
      • Fig 3: Measuring Voltage
      GF0003436Courtesy of FORD MOTOR CO.
    • Measure the voltage with the positive lead to VPWR solenoid pin and the negative lead to the TCC pin.
    • Select Parameter TCC#.
    • Increase and decrease the solenoid duty cycle, while monitoring the voltmeter, and solenoid state on the scan tool (ON and OFF), and listen for the solenoid to activate (click).
    • Does the voltage and solenoid state change? 
    1. YES  : Go to  A7.
    2. NO  : CHECK for open or short circuit in harness, solenoid or a PCM concern. If equipped with a fire suppression system, go to  A10.
  7. A7 CHECK MOLDED LEAD FRAME SOLENOID CONNECTIONS 
    • Key in OFF position.
    • Disconnect: Molded Lead Frame
    • Inspect the molded lead frame for damage.
      • Fig 4: Locating Lead Frame Connector Pins
      G04584207Courtesy of FORD MOTOR CO.
    • Using the special tool, check to make sure that the molded lead frame solenoid connections are making contact with the solenoids. The special tool should not pass through the connectors easily, it should have some resistance.
    • Does the special tool go easily through the molded lead frame connector pins? 
    1. YES  : INSTALL a new molded lead frame and Go to  A8 .
    2. NO  : Go to  A8.
  8. A8 CHECK SOLENOID RESISTANCE AT SOLENOID 
      Fig 5: Measuring Resistance
      GF0003438Courtesy of FORD MOTOR CO.
    • Measure the resistance of solenoid SSA and SSB.
      • Fig 6: Measuring Resistance
      GF0003439Courtesy of FORD MOTOR CO.
    • Measure the resistance of the TCC solenoid.
      Solenoid Resistance (ohms)
      SSA 20-30
      SSB 20-30
      TCC 10-16
    • Are the resistances correct? 
    1. YES  : Go to  A9.
    2. NO  : INSTALL a new solenoid. If equipped with a fire suppression system, go to  A10.
  9. A9 CHECK SOLENOID FOR A SHORT TO GROUND 
      Fig 7: Measuring Resistance
      GF0003440Courtesy of FORD MOTOR CO.
    • Measure the resistance between each of the TCC solenoid pins and ground.
      • Fig 8: Measuring Resistance
      GF0003441Courtesy of FORD MOTOR CO.
    • Measure the resistance between the SSA, SSB and vehicle power pins and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : INSTALL a new solenoid. If equipped with a fire suppression system, go to  A10.
    2. NO  : REFER to Diagnosis By Symptom  in this article for diagnosis of shift or torque converter concerns. If equipped with a fire suppression system, go to  A10.
  10. A10 REPOWER THE FIRE SUPPRESSION SYSTEM 
      WARNING: If equipped with fire suppression system, repower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM .
    • Verify that the fire suppression system is repowered. Refer to FIRE SUPPRESSION SYSTEM article.
    • Is the fire suppression system repowered? 
    1. YES  : Fire suppression system repowering is complete.
    2. NO  : REFER to FIRE SUPPRESSION SYSTEM article for fire suppression system depowering and repowering procedure.
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