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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1409 (Automatic Transmission - AISIN Aw21) >> Diagnostic Tests >> Pinpoint Tests - Non OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test A: Shift Solenoids

Pinpoint Test A: Shift Solenoids

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the Transaxle Vehicle Harness Connector illustration Transaxle Connector Layouts .
  1. A1 ELECTRONIC DIAGNOSTICS 
    • Check to make sure the transaxle harness connector is fully seated, pins are fully engaged in the connector and in good condition before proceeding.
    • Key in OFF position.
    • Connect the diagnostic tool.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Retrieve DTCs
    • Are there any transmission DTC faults present? 
    1. YES  : For Shift Solenoid A (SSA) and Shift Solenoid B (SSB), go to  A2 . For the Pressure Control Solenoid A (PCA), Shift Solenoid C (SSC), Shift Solenoid D (SSD), Shift Solenoid E (SSE), Shift Solenoid F (SSF) and Torque Converter Clutch (TCC), Go to  A4 .
    2. NO  : CLEAR all DTCs. ROAD TEST to verify if concern is still present. Concern could be intermittent. If concern is still present or reappears, go to the appropriate pinpoint test steps: For shift solenoids SSA and SSB, go to  A2 . For shift solenoids PCA, SSC, SSD, SSE, SSF and TCC, Go to  A4 .
  2. A2 CHECK RESISTANCE OF THE ON/OFF SOLENOID CIRCUIT 
    • Key in OFF position.
    • Remove the Transmission Control Module (TCM).
      • Fig 1: Checking Resistance Of ON/OFF Solenoid Circuit (SSB)
      GF0017748Courtesy of FORD MOTOR CO.
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 2 and ground for SSB.
      • Fig 2: Checking Resistance Of ON/OFF Solenoid Circuit (SSA)
      GF0017749Courtesy of FORD MOTOR CO.
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 5 and ground for SSA.
    • Is the resistance between 11-15 ohms? 
    1. YES  : INSTALL a new TCM and REFLASH to the latest level calibration. CLEAR all DTCs. ROAD TEST to verify concern is not present. Concern could be intermittent. If concern is still present or reappears, go to  A3 .
    2. NO  : Go to  A3.
  3. A3 CHECK RESISTANCE OF THE ON/OFF SOLENOIDS 
    • Remove the transaxle side cover.
    • Remove the wiring connector from the affected solenoid (SSA or SSB).
      • Fig 3: Checking Resistance Of ON/OFF Solenoids
      GF0017750Courtesy of FORD MOTOR CO.
    • Measure the resistance between solenoid pin 1 and ground of the affected solenoid.
    • Is each solenoid resistance between 11-15 ohms? 
    1. YES  : INSTALL a new internal wire harness or REPAIR affected circuit.
    2. NO  : INSTALL a new main control.
  4. A4 CHECK LINEAR SOLENOID SHORT TO GROUND 
    • Key in OFF position.
    • Remove the TCM.
      • Fig 4: Measuring Resistance At Transaxle Bulkhead Electrical Connector Between Pins And Ground
      GF0017751Courtesy of FORD MOTOR CO.
    • Measure the resistance between the pins in the following chart:
      TRANSAXLE BULKHEAD ELECTRICAL CONNECTOR

      Pin Number Circuit Function
      1 Pressure Control Solenoid A (PCA) ground
      3 PCA signal
      4 Torque Converter Clutch (TCC) ground
      9 TCC signal
      10 Shift Solenoid C (SSC) ground
      11 SSC signal
      14 Shift Solenoid E (SSE) signal
      16 Shift Solenoid F (SSF) ground
      17 Shift Solenoid D (SSD) signal
      18 SSD ground
      21 SSF signal
      22 SSE ground
    • Is each resistance greater than 10,000 ohms? 
    1. YES  : Go to  A5.
    2. NO  : Go to  A6.
  5. A5 CHECK RESISTANCE OF THE LINEAR SOLENOID(S) 
    • Inspect both sides of the TCM for damaged or pushed-out pins, corrosion or damaged seals.
      • Fig 5: Checking Resistance Of Linear Solenoid (TCC)
      GF0017752Courtesy of FORD MOTOR CO.
    • For the TCC solenoid, measure the resistance between pin 4 and pin 9 at the transaxle.
      • Fig 6: Checking Resistance Of Linear Solenoid (PCA)
      GF0017753Courtesy of FORD MOTOR CO.
    • For the PCA solenoid, measure the resistance between pin 3 and pin 1 at the transaxle.
      • Fig 7: Checking Resistance Of Linear Solenoid (SSF)
      GF0017754Courtesy of FORD MOTOR CO.
    • For the SSF solenoid, measure the resistance between pin 21 and pin 16 at the transaxle.
      • Fig 8: Checking Resistance Of Linear Solenoid (SSC)
      GF0017755Courtesy of FORD MOTOR CO.
    • For the SSC solenoid, measure the resistance between pin 11 and pin 10 at the transaxle.
      • Fig 9: Checking Resistance Of Linear Solenoid (SSD)
      GF0017756Courtesy of FORD MOTOR CO.
    • For the SSD solenoid, measure the resistance between pin 17 and pin 18 at the transaxle.
      • Fig 10: Checking Resistance Of Linear Solenoid (SSE)
      GF0017757Courtesy of FORD MOTOR CO.
    • For the SSE solenoid, measure the resistance between pin 14 and pin 22 at the transaxle.
    • Is the resistance between 5.0 - 5.6 ohms? 
    1. YES  : INSTALL a new TCM and REFLASH to the latest level calibration. CLEAR all DTCs. ROAD TEST to verify concern is not present. Concern could be intermittent. If concern is still present or reappears, go to  A6 .
    2. NO  : Go to  A6.
  6. A6 CHECK CONTINUITY OF THE INTERNAL HARNESS 
    • Remove the transaxle side cover.
    • Remove the wiring connector from the affected solenoid(s) (PCA, SSC, SSD, SSE, SSF and TCC).
    • Measure the resistance between the bulkhead connector and the affected solenoid electrical connector.
    • Is each solenoid resistance less than 5 ohms? 
    1. YES  : INSTALL a new main control.
    2. NO  : INSTALL a new internal wire harness or repair affected circuit.
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