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Home >> Ford >> 2005 >> Escape Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1315 (Cruise Control System) >> Diagnosis And Testing >> Cruise Control >> Pinpoint Tests >> Pinpoint Test B: DTC P0572, P0573 Or P1703 >> Pinpoint Test B: DTC P0572, P0573 Or P1703

Pinpoint Test B: DTC P0572, P0573 Or P1703

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. B1 CHECK THE OPERATION OF THE STOPLAMPS 
    • Ignition ON.
    • Operate the stoplamps.
    • Do the stoplamps operate correctly? 
    • Yes:  : GO to  B2.
    • No:  REFER to STOPLAMPS to continue diagnosis of the stoplamps.
  2. B2 CHECK FOR ABS DTCs 
    • Review the recorded DTCs from the ABS self-test.
    • Are any DTCs recorded? 
    • Yes:  REFER to VEHICLE DYNAMIC SYSTEMS . REPAIR all ABS module DTCs and RETEST the cruise control.
    • No:  For 3.5L engines, go to  B3.

      Otherwise, go to  B4.

  3. B3 CHECK THE STOPLAMP SWITCH (BOO AND BPA) PIDs 
    • Enter the following diagnostic mode on the scan tool: PCM DataLogger.
    • Monitor the PCM PIDs BOO (brake pedal top travel) and BPA (brake pedal bottom travel) while applying and releasing the brake pedal as follows:
      STOPLAMP SWITCH POSITIONS TABLE

      Brake Pedal Position BOO PID BPA PID
      Released Off Off
      Applied firmly On On
    • Do the PID values agree with the brake pedal position? 
    • Yes:  GO to  B9.
    • No:  For an incorrect BOO1 PID value, GO to  B5.

      If the BOO2 PID value reads On, GO to  B7.

      If the BOO2 PID value reads OFF, GO to  B6.

  4. B4 CHECK THE STOPLAMP SWITCH (BOO1 AND BOO2) PIDs 
    • Enter the following diagnostic mode on the scan tool: PCM DataLogger.
    • Monitor the PCM PIDs BOO1 (brake pedal top travel) and BOO2 (brake pedal bottom travel) while applying and releasing the brake pedal as follows:
      STOPLAMP SWITCH POSITIONS TABLE

      Brake Pedal Position BOO1 PID BOO2 PID
      Released Off Off
      Applied firmly On On
    • Do the PID values agree with the brake pedal position? 
    • Yes:  GO to  B9.
    • No:  For an incorrect BOO1 PID value, GO to  B5.

      If the BOO2 PID value reads On, GO to  B7.

      If the BOO2 PID value reads OFF, GO to  B6.

  5. B5 CHECK THE STOPLAMP SWITCH CIRCUIT FOR VOLTAGE 
    • Ignition OFF.
    • Disconnect: PCM C175b.
    • Ignition ON.
    • For vehicles with 2.5L and 3.0L engines, while applying the brake pedal, measure the voltage between the PCM C175b-13, circuit CCB08 (VT/WH), harness side and ground.
      Fig 1: Measuring Voltage Between PCM C175b-13, Circuit CCB08 (VT/WH) & Ground
      G06254554Courtesy of FORD MOTOR CO.
    • For vehicles with 3.5L engines, while applying the brake pedal, measure the voltage between the PCM C175b-46, circuit CCB08 (VT/WH), harness side and ground.
      Fig 2: Measuring Voltage Between PCM C175b-46, Circuit CCB08 (VT/WH) & Ground
      G06075149Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts with the brake pedal applied and 0 volts with the brake pedal released? 
    • Yes:  GO to  B9.
    • No:  REPAIR the circuit for an open. CLEAR the DTCs. TEST the system for normal operations.
  6. B6 CHECK THE CRUISE CONTROL DEACTIVATOR SWITCH CIRCUIT FOR A SHORT TO VOLTAGE 
    • Disconnect: Stoplamp Switch C278.
    • Measure the voltage between the stoplamp switch C278-3, circuit CES09 (VT/OG), harness side and ground.
      Fig 3: Checking Circuit
      G06254556Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR the circuit. CLEAR the DTCs. TEST the system for normal operations.
    • No:  INSTALL a new stoplamp switch. REFER to REMOVAL AND INSTALLATION . CLEAR the DTCs. TEST the system for normal operations.
  7. B7 CHECK THE CRUISE CONTROL DEACTIVATOR SWITCH VOLTAGE SUPPLY CIRCUIT FOR AN OPEN 
    • Disconnect: Stoplamp Switch C278.
    • Measure the voltage between the stoplamp switch C278-2, circuit CBK02 (GN), harness side and ground.
      Fig 4: Checking Circuit
      G06098502Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes:  GO to  B8.
    • No:  REPAIR the circuit. CLEAR the DTCs. TEST the system for normal operations.
  8. B8 CHECK THE CRUISE CONTROL DEACTIVATOR SWITCH CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: PCM C175b.
    • For vehicles with 2.5L and 3.0L engines, measure the resistance between the PCM C175b-46, circuit CES09 (VT/OG), harness side and the stoplamp switch C278-3, circuit CES09 (VT/OG), harness side.
      Fig 5: Measuring Resistance Between PCM C175b-46, Circuit CES09 (VT/OG) & Stoplamp Switch C278-3, Circuit CES09 (VT/OG)
      G06098505Courtesy of FORD MOTOR CO.
    • For vehicles with 3.5L engines, measure the resistance between the PCM C175b-47, circuit CES09 (VT/OG), harness side and the stoplamp switch C278-3, circuit CES09 (VT/OG), harness side.
      Fig 6: Measuring Resistance Between PCM C175b-47, Circuit CES09 (VT/OG) & Stoplamp Switch C278-3, Circuit CES09 (VT/OG)
      G06271326Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  INSTALL a new stoplamp switch. REFER to REMOVAL AND INSTALLATION . CLEAR the DTCs. TEST the system for normal operations.
    • No:  REPAIR the circuit. CLEAR the DTCs. TEST the system for normal operations.
  9. B9 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the PCM connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new PCM. REFER to INSTALLATION 2.5L , INSTALLATION 3.0L (4V) or INSTALLATION 3.5L . TEST the system for normal operation.
    • No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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