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HOMESERVICE MANUALSFORD2021EDGE SE, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 13 (ENGINE CONTROLS - PINPOINT TESTS (DIESEL))PINPOINT TESTS AI: BRAKE PEDAL POSITION (BPP) SWITCHTEST PROCEDURE
2021 Ford Edge SE, 4WD

Test Procedure

2021 Ford Edge SE, 4WDSECTION Test Procedure
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, 2018 Ford Transit-150, and 2018 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
  1. AI1 CHECK FOR DTCS 

    Are DTCs P0504, P0572, P0573 or P1703 present? 

    Yes No
    For KOER DTC P1703, GO to  AI2.
    For all others, GO to  AI3.    		 Unable to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the concern. REPAIR as necessary.
    RETURN to SYMPTOM CHARTS for further direction.
  2. AI2 VERIFY THE BRAKE PEDAL WAS APPLIED 

    Was the brake pedal applied and released during the KOER self-test? 

    Yes No
    GO to  AI3. REPEAT the KOER self-test. APPLY and RELEASE the brake pedal during the KOER test.
    Clear the PCM DTCs. REPEAT the self-test.
  3. AI3 CHECK THE OPERATION OF THE STOPLAMPS 
    • Ignition ON, engine OFF.
    • Apply and release the brake pedal and check the stoplamp operation.

    Do the stoplamps operate correctly? 

    Yes No
    GO to  AI4. REFER to the appropriate Exterior Lighting article, to diagnose all the stoplamps are inoperative.
    Clear the PCM DTCs. REPEAT the self-test.
  4. AI4 CHECK THE BRAKE SWITCH OPERATION 
    • Access the PCM and monitor the BOO1 (MODE) PID.
    • Apply and release the brake pedal while monitoring the brake position PID.

    Does the BOO1 PID state change when the brake pedal is fully applied and released? 

    Yes No
    GO to  AI6. GO to  AI5.
  5. AI5 CHECK FOR BPP CIRCUIT CYCLING 
    • Ignition OFF.
    • PCM-B connector disconnected.
    • Ignition ON, engine OFF.
    • Fully apply and release the brake pedal while measuring the voltage.
    • Measure the voltage between:
      (+) PCM-B Connector, Harness Side (-)
      BPP Ground

    Is voltage less than 1 volt with the brake pedal released and greater than 10.5 volts with the brake pedal fully applied? 

    Yes No
    GO to  AI6. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  6. AI6 CHECK FOR BPS CIRCUIT CYCLING 
    • Ignition OFF.
    • PCM-B connector disconnected.
    • Fully apply and release the brake pedal while measuring the resistance.
    • Measure the resistance between:
      (+) PCM-B Connector, Harness Side (-)
      BPS Ground

    Is the resistance less than 5 ohms with brake pedal released and greater than 10, 000 ohms with the brake pedal pressed? 

    Yes No
    GO to  AI11. GO to  AI7.
  7. AI7 CHECK THE BPP SWITCH FOR CORRECT OPERATION 
    • Ignition OFF.
    • BPP Switch connector disconnected.
    • Fully apply and release the brake pedal while measuring the resistance.
    • Measure the resistance between:
      (+) BPP Switch Connector, Component Side (-) BPP Switch Connector, Component Side
      BPS - Pin 2 GND - Pin 3

    Is the resistance less than 5 ohms with the brake pedal released and greater than 10, 000 ohms with the brake pedal pressed? 

    Yes No
    GO to  AI8. INSTALL a new BPP switch. Clear the PCM DTCs. REPEAT the self-test.
  8. AI8 CHECK THE BPS AND GND CIRCUITS FOR AN OPEN 
    • Measure the resistance between:
      (+) PCM-B Connector, Harness Side (-) BPP Switch Connector, Harness Side
      BPS BPS - Pin 2
    • Measure the resistance between:
      (+) BPP Switch Connector, Harness Side (-)
      GND - Pin 3 Ground

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  AI9. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  9. AI9 CHECK THE BPS CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
      (+) PCM-B Connector, Harness Side (-)
      BPS Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  AI10. REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  10. AI10 CHECK THE BPS CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) PCM-B Connector, Harness Side (-)
      BPS Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.    		 GO to  AI11.
  11. AI11 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.
    • 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.
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When to See a Mechanic

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

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • 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.