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Home › Ford › 2014 › Fusion Energi Titanium › Repair and Diagnosis › Engine Performance › System › Engine Controls - Pinpoint Tests (Hybrid) › Pinpoint Test Tr: Electric Vehicle (EV) Mode Switch › Test Procedure

Test Procedure

  1. TR1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 
    • Ignition ON, engine OFF.

    Are DTCs P071A or P071B present? 

    Yes No
    GO to TR2  . RETURN to ENGINE CONTROLS - SYMPTOM CHARTS (HYBRID) for further direction.
  2. TR2 CHECK THE EV MODE SWITCH 
    • EV Mode Switch connector disconnected.
    • Measure the resistance between:
      (+) EV Mode Switch Connector, Component Side (-) EV Mode Switch Connector, Component Side
      EVM - Pin 4 GND - Pin 12
    • Cycle the EV mode switch.

    Does the resistance change from greater than 10K ohms with the EV mode switch released to less than 5 ohms with the switch pressed? 

    Yes No
    GO to TR3  . INSTALL a new EV Mode switch. REFER to the Supplemental Restraint System article.
    Clear the SOBDMC DTCs. REPEAT the self-test.
  3. TR3 CHECK THE EVM CIRCUIT FOR AN OPEN 
    • TCM-A connector disconnected.
    • Measure the resistance between:
      (+) EV Mode Switch Connector, Harness Side (-) TCM-A Connector, Harness Side
      EVM - Pin 4 EVM - Pin 27

    Is the resistance less than 5 ohms? 

    Yes No
    GO to TR4  . REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.
  4. TR4 CHECK THE EVM CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
      (+) EV Mode Switch Connector, Harness Side (-)
      EVM - Pin 4 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to TR5  . REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test.
  5. TR5 CHECK THE EVM CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) EV Mode Switch Connector, Harness Side (-)
      EVM - Pin 4 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test. GO to TR6  .
  6. TR6 CHECK FOR CORRECT TCM OPERATION 
    • Disconnect all the TCM connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the TCM connectors and make sure they seat correctly.
    • Carry out the SOBDMC self-test.
    • Verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new TCM.
    REFER to the Automatic Transmission article. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the TRID Block for a Replacement TCM.    		 The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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