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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 AI: Brake Pedal Position (BPP) Switch >> Test Procedure

Test Procedure

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  1. AI1 DIAGNOSTIC TROUBLE CODE P1703 
    NOTE: DTC P1703 indicates that during the key on engine running (KOER) self-test, the BPP signal did not cycle.
    • Possible causes:
      • brake pedal not applied and released during KOER self-test
      • BPP switch
      • BPP switch signal circuit open
      • BPP switch signal circuit short to voltage
    • Key ON, engine OFF.
    • Access the BPP PID.

    Does the BPP PID indicate ON? 

    Yes No
    GO to  AI2. GO to  AI4.
  2. AI2 CHECK THE BPP SWITCH 
    • Key ON.
    • Disconnect the BPP switch.
    • Key ON, engine OFF.
    • Access the BPP PID.

    Does the BPP PID indicate ON? 

    Yes No
    GO to  AI3. INSTALL a new BPP switch. CLEAR the DTCs. REPEAT the self-test.
  3. AI3 CHECK THE BPP SWITCH SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    • Key OFF.
    • Disconnect the PCM.
    • Key ON, engine OFF.
    • Measure the voltage between the BPP switch signal circuit pin 2, harness side and ground.

    Is any voltage indicated? 

    Yes No
    REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. INSTALL a new PCM. CLEAR the DTCs. REPEAT the self-test.
  4. AI4 CHECK THE BPP SWITCH OPERATION 
    • Monitor the BPP PID while applying and releasing the brake pedal.

    Does the BPP 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  AI5.
  5. AI5 CHECK THE BPP SWITCH FOR VOLTAGE 
    • Key OFF.
    • Disconnect the BPP switch.
    • Measure the voltage between the BPP switch B+ circuit pin 3 (F-Super Duty/Excursion) or pin 1 (E-Series), harness side and ground.

    Is the voltage greater than 10.5 volts? 

    Yes No
    GO to  AI6. REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  6. AI6 CHECK THE BPP SWITCH SIGNAL 
    • Key ON, engine OFF.
    • Access the BPP PID.
    • Connect a 5-amp fused jumper wire between the BPP switch B+ circuit pin 3 (F-Super Duty/Excursion) or pin 1 (E-Series), harness side and the BPP switch signal circuit pin 2, harness side.

    Does the BPP PID indicate ON? 

    Yes No
    INSTALL a new BPP switch. CLEAR the DTCs. REPEAT the self-test. GO to  AI7.
  7. AI7 CHECK THE BPP SWITCH INPUT CIRCUIT FOR AN OPEN 
    • Key OFF.
    • Disconnect the PCM body harness connector.
    • Measure the resistance between the BPP switch signal circuit pin 2, harness side and the PCM body harness connector pin 18, harness side.

    Is the resistance less than 5 ohms? 

    Yes No
    INSTALL a new PCM. CLEAR the DTCs. REPEAT the self-test. REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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