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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1059 (Engine Controls - Pinpoint Tests - 6.0L Diesel (99P F450/550)) >> Pinpoint Test AY: Brake Pressure Applied (BPA) Switch >> Test Procedure

Test Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 Ford RV Cutaway, 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
  1. AY1 CHECK THE BPA SIGNAL 
    NOTE: Full brake pedal application may be necessary to correctly operate the BPA switch.
    • Key ON, engine OFF.
    • Access the BPA PID.
    • Monitor the BPA PID while applying and releasing the brake pedal.

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

    Yes No
    UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the fault. REPAIR as necessary. REFER to SYMPTOM CHARTS - 6.0L DIESEL if a driveability concern exists. GO to  AY2.
  2. AY2 CHECK THE BPA SIGNAL VOLTAGE 
    NOTE: Full brake pedal application may be necessary to correctly operate the BPA switch.
    • Key OFF.
    • Disconnect the PCM.
    • Key ON, engine OFF.
    • Measure the voltage between the PCM body harness connector pin 28, harness side and ground while fully applying and releasing the brake pedal.

    Is the voltage greater than 10 volts with the pedal released and less than 1 volt with the pedal fully applied? 

    Yes No
    INSTALL a new PCM. CLEAR the DTCs. REPEAT the self-test. GO to  AY3.
  3. AY3 CHECK THE BPA SENSOR VOLTAGE 
    • Key OFF.
    • Disconnect the BPA switch.
    • Key ON, engine OFF.
    • Measure the voltage between the BPA switch pin 1 (F-Super Duty/Excursion) or pin 2 (E-Series), harness side and ground.

    Is the voltage greater than 10 volts? 

    Yes No
    GO to  AY4. REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  4. AY4 CHECK THE BPA SWITCH 
    NOTE: Full brake application may be necessary to correctly operate the BPA switch.
    • Key OFF.
    • Measure the resistance between the BPA switch pin 1, component side and the BPA switch pin 2, component side while fully applying and releasing the brake pedal.

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

    Yes No
    REPAIR the signal circuit. CLEAR the DTCs. REPEAT the self-test. INSTALL a new BPA switch. CLEAR the DTCs. REPEAT the self-test.
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