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Pinpoint Test B: B1B57:11

  1. NOTE: Before disconnecting the IPMA or any of the parking aid sensors, verify the connectors are properly seated and latched.

    Refer to Parking Aid - System Operation and Component Description  for schematic and connector information.

    Normal Operation and Fault Conditions 

    The IPMA supplies voltage to the front parking aid sensors via a common circuit.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    IPMA B1B57:11 Front Sensors Power Circuit: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the front sensor voltage supply circuit is shorted to ground or the signal return circuit.

    Possible Sources 

    • Wiring, terminals or connectors
    • Front parking aid sensor
    • Front active park assist sensor (if equipped)
    • IPMA

  2. B1 CHECK THE FRONT BUMPER WIRING HARNESS

    • Ignition OFF.

    • Inspect the front bumper wiring harness for opens, shorts, grounds, or corrosion.

    Is the front bumper wiring harness OK? 

    Yes  GO to  B2
    No  REPAIR or INSTALL a new bumper wiring harness.

  3. B2 CHECK THE LHF (LEFT-HAND FRONT) OUTER PARKING AID SENSOR FOR AN INTERNAL SHORT

    • Disconnect: LHF Outer Parking Aid Sensor C1428.

    • Ignition ON.

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the IPMA self-test.

    Is DTC B1B57:11 present? 

    Yes  GO to  B3
    No  INSTALL a new LHF outer parking aid sensor. REFER to: Front Parking Aid Sensor .

  4. B3 CHECK THE LHF (LEFT-HAND FRONT) INNER PARKING AID SENSOR FOR AN INTERNAL SHORT

    • Ignition OFF.

    • Disconnect: LHF Inner Parking Aid Sensor C1429.

    • Ignition ON.

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the IPMA self-test.

    Is DTC B1B57:11 present? 

    Yes  If the vehicle is equipped with active park assist, GO to  B4 If the vehicle is NOT equipped with active park assist, GO to  B6
    No  INSTALL a new LHF inner parking aid sensor. REFER to: Front Parking Aid Sensor .

  5. B4 CHECK THE LHF (LEFT-HAND FRONT) ACTIVE PARK ASSIST SENSOR FOR AN INTERNAL SHORT

    • Ignition OFF.

    • Disconnect: LHF active park assist sensor C1607.

    • Ignition ON.

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the IPMA self-test.

    Is DTC B1B57:11 present? 

    Yes  GO to  B5
    No  INSTALL a new LHF active park assist sensor. REFER to: Front Active Park Assist Sensors .

  6. B5 CHECK THE RHF (RIGHT-HAND FRONT) ACTIVE PARK ASSIST SENSOR FOR AN INTERNAL SHORT

    • Ignition OFF.

    • Disconnect: RHF active park assist sensor C1608.

    • Ignition ON.

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the IPMA self-test.

    Is DTC B1B57:11 present? 

    Yes  GO to  B6
    No  INSTALL a new RHF active park assist sensor. REFER to: Front Active Park Assist Sensors .

  7. B6 CHECK THE RHF (RIGHT-HAND FRONT) INNER PARKING AID SENSOR FOR AN INTERNAL SHORT

    • Ignition OFF.

    • Disconnect: RHF inner parking aid sensor C1430.

    • Ignition ON.

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the IPMA self-test.

    Is DTC B1B57:11 present? 

    Yes  GO to  B7
    No  INSTALL a new RHF inner parking aid sensor. REFER to: Front Parking Aid Sensor .

  8. B7 CHECK THE RHF (RIGHT-HAND FRONT) OUTER PARKING AID SENSOR FOR AN INTERNAL SHORT

    • Ignition OFF.

    • Disconnect: RHF Outer Parking Aid Sensor C1431.

    • Ignition ON.

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the IPMA self-test.

    Is DTC B1B57:11 present? 

    Yes  GO to  B8
    No  INSTALL a new RHF outer parking aid sensor. REFER to: Front Parking Aid Sensor .

  9. B8 CHECK THE FRONT PARKING AID SENSOR VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect IPMA C4242A.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4242A-22
      GFD609699Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  B9
    No  REPAIR the circuit.

  10. B9 CHECK THE FRONT PARKING AID SENSOR VOLTAGE SUPPLY CIRCUIT AND GROUND CIRCUIT FOR A SHORT TOGETHER

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4242A-22
      GFD609699Courtesy of FORD MOTOR COMPANY
      		 C4242A-11

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  B10
    No  REPAIR the circuit.

  11. B10 CHECK FOR CORRECT IPMA (IMAGE PROCESSING MODULE A) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all IPMA connectors.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the IPMA connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPMA. REFER to: Image Processing Module A (IPMA) .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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