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Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transaxle (AISIN Aw21)) >> Diagnosis And Testing >> Pinpoint Tests - OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test A: Shift Solenoids

Pinpoint Test A: Shift Solenoids

WARNING: This page is about a different variant/trim than selected.
NOTE: Refer to the Transaxle Vehicle Harness Connector illustrations within the TRANSAXLE CONNECTOR LAYOUTS  procedure .
  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.
    • Ignition OFF.
    • Connect the scan tool.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Retrieve DTCs.
    • Are there any transmission DTC faults present? 
      • Yes:  For Shift Solenoid A (SSA) and Shift Solenoid B (SSB), GO to A2. For the Line Pressure Control (LPC), Shift Solenoid C (SSC), Shift Solenoid D (SSD), Shift Solenoid E (SSE), Shift Solenoid F (SSF) and Torque Converter Clutch (TCC), GO to  A4.
      • 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 LPC, SSC, SSD, SSE, SSF and TCC, GO to  A4.
  2. A2 CHECK RESISTANCE OF THE ON/OFF SOLENOID CIRCUIT 
    • Ignition OFF.
    • Remove the Transmission Control Module (TCM).
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 2 and ground for SSB.
      Fig 1: Measuring Resistance At Transaxle Bulkhead Electrical Connector Between Pin 2 And Ground
      G06263899Courtesy of FORD MOTOR CO.
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 5 and ground for SSA.
      Fig 2: Measuring Resistance At Transaxle Bulkhead Electrical Connector Between Pin 5 And Ground
      G06263900Courtesy of FORD MOTOR CO.
    • Is the resistance between 11-15 ohms? 
      • Yes:  INSTALL a new Transmission Control Module (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.
      • 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).
    • Measure the resistance between solenoid pin 1 and ground of the affected solenoid.
      Fig 3: Measuring Resistance Between Solenoid Pin 1 And Ground Of Affected Solenoid
      G06263901Courtesy of FORD MOTOR CO.
    • Is the solenoid resistance between 11-15 ohms? 
      • Yes:  INSTALL a new internal wire harness or REPAIR affected circuit.
      • No:  INSTALL a new main control.
  4. A4 CHECK LINEAR SOLENOID SHORT TO GROUND 
    • Ignition OFF.
    • Remove the TCM.
    • Measure the resistance between the transaxle bulkhead electrical connector pin and ground using the following chart:
      TRANSAXLE BULKHEAD ELECTRICAL CONNECTOR

      Pin Number Circuit Function
      1 Line Pressure Control (LPC) ground
      3 LPC 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? 
      • Yes:  GO to A5.
      • 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.
    • For the TCC solenoid, measure the resistance between pin 4 and pin 9 at the transaxle.
      Fig 4: Measuring Resistance Between Pin 4 And Pin 9 At Transaxle
      G06263902Courtesy of FORD MOTOR CO.
    • For the LPC solenoid, measure the resistance between pin 3 and pin 1 at the transaxle.
      Fig 5: Measuring Resistance Between Pin 3 And Pin 1 At Transaxle
      G06263903Courtesy of FORD MOTOR CO.
    • For the SSF solenoid, measure the resistance between pin 21 and pin 16 at the transaxle.
      Fig 6: Measuring Resistance Between Pin 21 And Pin 16 At Transaxle
      G06263904Courtesy of FORD MOTOR CO.
    • For the SSC solenoid, measure the resistance between pin 11 and pin 10 at the transaxle.
      Fig 7: Measuring Resistance Between Pin 11 And Pin 10 At Transaxle
      G06263905Courtesy of FORD MOTOR CO.
    • For the SSD solenoid, measure the resistance between pin 17 and pin 18 at the transaxle.
      Fig 8: Measuring Resistance Between Pin 17 And Pin 18 At Transaxle
      G06263906Courtesy of FORD MOTOR CO.
    • For the SSE solenoid, measure the resistance between pin 14 and pin 22 at the transaxle.
      Fig 9: Measuring Resistance Between Pin 14 And Pin 22 At Transaxle
      G06263907Courtesy of FORD MOTOR CO.
    • Is the resistance between 5.0 - 5.6 ohms? 
      • 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.
      • 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) (LPC, SSC, SSD, SSE, SSF and TCC).
    • Measure the resistance between the bulkhead connector and the affected solenoid electrical connector.
    • Is the resistance less than 5 ohms? 
      • Yes:  INSTALL a new main control.
      • No:  INSTALL a new internal wire harness or repair affected circuit.
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