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Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 598 (Parking Aid System) >> Diagnosis And Testing >> Parking Aid >> Pinpoint Tests >> Pinpoint Test B : DTC B1B44:14, B1B46:14, B1B48:14 Or B1B50:14 >> Pinpoint Test B : DTC B1B44:14, B1B46:14, B1B48:14 Or B1B50:14

Pinpoint Test B : DTC B1B44:14, B1B46:14, B1B48:14 Or B1B50:14

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Before disconnecting the PAM or any of the sensors, verify that the connectors are properly seated and latched.

  1. B1 CHECK THE PAM DTCs

    • Ignition ON.
    • Using a diagnostic scan tool, perform the PAM self-test.

    Are multiple rear parking aid sensor DTCs recorded? 

    Yes  GO to  B2.
    No  GO to  B3.

  2. B2 CHECK THE REAR BUMPER WIRING HARNESS AND CONNECTOR INTEGRITY

    • Ignition OFF.
    • Inspect the PAM and sensor connectors for correct latching by pulling on the latched connector.
    • Inspect the rear bumper wiring harness for opens, shorts, grounds, or corrosion.

    Is the bumper wiring harness OK? 

    Yes  GO to  B3.
    No  REPAIR or INSTALL a new rear bumper wiring harness.

  3. B3 CHECK THE REAR SENSOR SIGNAL CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure:

      DTC B1B44:14 

      Positive Lead Measurement / Action Negative Lead
      C4011-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

      DTC B1B46:14 

      Positive Lead Measurement / Action Negative Lead
      C4012-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

      DTC B1B48:14 

      Positive Lead Measurement / Action Negative Lead
      C4009-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

      DTC B1B50:14 

      Positive Lead Measurement / Action Negative Lead
      C4010-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  B4.
    No  REPAIR the circuit in question.

  4. B4 CHECK THE REAR SENSOR CIRCUITS FOR AN OPEN

    Are the resistances less than 3 ohms? 

    Yes  If all of the parking aid sensors recorded DTCs, GO to  B5.If one or more (but not all) parking aid sensor(s) recorded DTCs, INSTALL a new sensor(s) for the one in question. REFER to Parking Aid Sensor - Rear .
    No  REPAIR the circuit in question.

  5. B5 CHECK FOR CORRECT PAM OPERATION

    • Disconnect and inspect the PAM connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the PAM 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new PAM. REFER to Parking Aid Module (PAM) .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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