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Home >> Ford >> 2021 >> Transit-250 Base, Van Cargo, 3.5L Eng VIN 8, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Parking Aid - Vehicles With: Rear Parking Aid >> Diagnosis And Testing >> Parking Aid >> Pinpoint Test(s) >> Pinpoint Test I: B1B46:08, B1B46:31 Or B1B46:1F

Pinpoint Test I: B1B46:08, B1B46:31 Or B1B46:1F

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

    Refer to Wiring Diagrams PARKING AID for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Parking Aid - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PAM B1B46:08 Right Rear Inner Sensor: Bus Signal/Message Failures A continuous and on-demand DTC that sets in the PAM when there is a message failure on the LIN for the RHR inner parking aid sensor.
    PAM B1B46:31 Right Rear Inner Sensor: No Signal A continuous and on-demand DTC that sets in the PAM when no signal is received on the LIN for the RHR inner parking aid sensor.
    PAM B1B46:1F Right Rear Inner Sensor: Circuit Intermittent A continuous and on-demand DTC that sets in the PAM when an intermittent fault is detected on the LIN for the RHR inner parking aid sensor.

    Possible Sources 

    • Wiring, terminals or connectors
    • RHR inner parking aid sensor
    • PAM

  2. I1 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PAM (PARKING ASSIST CONTROL MODULE) SELF-TEST

    • Ignition ON.

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

    • Check the parking aid Diagnostic Trouble Codes (DTCs) from the self-test.

    Are Diagnostic Trouble Codes (DTCs) for multiple rear parking aid sensors recorded? 

    Yes  GO to  I2
    No  * For Diagnostic Trouble Codes (DTCs) B1B46:08, B1B46:31 or B1B46:1F GO to  I3
    * For all other PAM Diagnostic Trouble Codes (DTCs), REFER to the Diagnostic Trouble Code (DTC) Chart .

  3. I2 CHECK THE REAR BUMPER WIRING HARNESS

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

    Is the rear bumper wiring harness OK? 

    Yes  GO to  I3
    No  REPAIR or INSTALL a new rear bumper wiring harness.

  4. I3 CHECK FOR VOLTAGE TO THE SENSOR

    • Ignition OFF.

    • Disconnect RHR inner parking aid sensor C4012.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4012-1
      GFD567679Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 9 volts? 

    Yes  GO to  I4
    No  REPAIR the circuit.

  5. I4 CHECK FOR GROUND AT THE SENSOR

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4012-1
      GFD567679Courtesy of FORD MOTOR COMPANY
      		 C4012-3

    Is the voltage greater than 9 volts? 

    Yes  GO to  I5
    No  REPAIR the circuit.

  6. I5 CHECK THE SENSOR FOR A SHORT TO POWER

    • Disconnect PAM C9071A.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4012-2
      GFD567679Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the affected circuits.
    No  GO to  I6

  7. I6 CHECK THE SENSOR FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4012-2
      GFD567678Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  I7
    No  REPAIR the circuit.

  8. I7 CHECK THE SENSOR FOR A SHORT TO VREF OR SIGNAL RETURN CIRCUITS

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4012-2
      GFD567678Courtesy of FORD MOTOR COMPANY
      		 C4012-1
      C4012-2
      GFD567678Courtesy of FORD MOTOR COMPANY
      		 C4012-3

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  I8
    No  REPAIR the affected circuits.

  9. I8 CHECK THE SENSOR CIRCUITS FOR AN OPEN

    • Ignition OFF.

    Are the resistances less than 3 ohms? 

    Yes  GO to  I9
    No  REPAIR the affected circuit.

  10. I9 INSTALL A KNOWN GOOD SENSOR

    • Connect PAM C9071A.

    • Ignition ON.

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

    Is DTC B1B46:08, B1B46:31 or B1B46:1F still present? 

    Yes  GO to  I10
    No  INSTALL a new RHR inner parking aid sensor. REFER to: Rear Inner Parking Aid Sensor .

  11. I10 CHECK FOR CORRECT PAM (PARKING ASSIST CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all PAM 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 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 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 PAM. INSTALL a new PAM
    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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