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HOMESERVICE MANUALSFORD2007FOCUS SES, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1627 (ENGINE CONTROLS - PINPOINT TEST KE: IDLE AIR CONTROL (IAC) VALVE THROUGH PINPOINT TEST Z: INTERMITTENT - (EXCEPT DIESEL & HYBRID))PINPOINT TEST TB: TRANSMISSION CONTROL SWITCH (TCS)/TRANSMISSION CONTROL INDICATOR LAMP (TCIL)TEST PROCEDURE
2007 Ford Focus SES, 4D Sedan, Standard

Test Procedure

2007 Ford Focus SES, 4D Sedan, StandardSECTION Test Procedure
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Milan, and 2006 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
  1. TB1 CHECK FOR DTCS 

    Is DTC P1780 present? 

    Yes No
    GO to  TB2. For TCIL never on, GO to  TB10.
    For TCIL always on, GO to  TB8.
  2. TB2 DTC P1780: CHECK THE TCS FUNCTION 
    NOTE: Verify the TCS was cycled during self-test.
    • Key ON, engine OFF.
    • Access the TCS PID.
    • Apply and release the TCS and then hold it applied for 3 seconds. Release the switch.

    Does the TCS PID change from ON to OFF and does the PID indicate ON when the switch is applied? 

    Yes No
    REPEAT the KOER self-test and cycle the TCS during the test. GO to  TB3.
  3. TB3 CHECK THE TCS VOLTAGE 
    • Key in OFF position.
    • PCM connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) PCM Connector, Harness Side ( - )
      TCS Ground
    • Monitor the voltage while applying and releasing the TCS several times.

    Does the voltage change states? 

    Yes No
    GO to  TB12. GO to  TB4.
  4. TB4 CHECK THE TCS CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Key in OFF position.
    • TCS connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - )
      TCS Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  TB5. REPAIR the short circuit. CLEAR the DTCs.
    REPEAT the self-test.
  5. TB5 CHECK FOR VOLTAGE TO THE TCS 
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) TCS Connector, Harness Side ( - )
      VPWR Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  TB6. REPAIR the open circuit. CLEAR the DTCs.
    REPEAT the self-test.
  6. TB6 CHECK THE TCS CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Key in OFF position.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) TCS Connector, Harness Side
      TCS TCS

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  TB7. REPAIR the open circuit. CLEAR the DTCs.
    REPEAT the self-test.
  7. TB7 CHECK THE TCS CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS 
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) TCS Connector, Harness Side ( - )
      TCS Ground

    Is the voltage less than 1 V? 

    Yes No
    INSTALL a new TCS.
    REFER to the appropriate AUTOMATIC TRANSMISSION/TRANSAXLE EXTERNAL CONTROLS article .
    CLEAR the DTCs. REPEAT the self-test.    		 REPAIR the short circuit. CLEAR the DTCs.
    REPEAT the self-test.
  8. TB8 TCIL ALWAYS ON: CHECK THE TCIL FUNCTION 
    • Key ON, engine OFF.
    • Apply and release the TCS.

    Does the TCIL change state? 

    Yes No
    Unable to duplicate or identify the concern at this time.
    GO to Pinpoint Test Z .    		 GO to  TB9.
  9. TB9 CHECK THE TCIL CIRCUIT(S) FOR A SHORT TO GROUND IN THE HARNESS 
    NOTE: The TCIL turns off when the PCM is disconnected.
    • Key in OFF position.
    • PCM connector disconnected.
    • Key ON, engine OFF.

    Does the TCIL change state? 

    Yes No
    GO to  TB12. REPAIR the short circuit. CLEAR the DTCs.
    REPEAT the self-test.
  10. TB10 TCIL NEVER ON: CHECK FOR KOER P1780 
    • Check the PCM for KOER DTCs.

    Is DTC P1780 present? 

    Yes No
    REPAIR the DTC. CLEAR the DTCs. REPEAT the self-test.
    GO to  TB2.    		 GO to  TB11.
  11. TB11 CHECK FOR VOLTAGE TO THE TCIL 
    • Key in OFF position.
    • PCM connector disconnected.
    • Key ON, engine OFF.
    • Connect a 5 amp fused jumper wire between the following:
      Point A PCM Connector, Harness Side Point B Vehicle Battery
      TCIL Negative terminal

    Does the TCIL illuminate? 

    Yes No
    GO to  TB12. CHECK the indicator bulb and the fuse. If OK, the open is in the wiring between the ignition switch and the TCIL pin at the harness connector. REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.
  12. TB12 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Visually inspect for:
      • pushed out pins.
      • corrosion.
    • Connect all the PCM connectors and make sure they seat correctly.
    • Carry out the PCM self-test and verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new PCM.
    REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .    		 The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.