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Pinpoint Test A : U3003:16

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NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

  1. A1 RECHECK THE EPB (ELECTRIC PARKING BRAKE) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, clear the EPB module Diagnostic Trouble Codes (DTCs).
    • Ignition OFF.
    • Start the engine and allow to idle for 2 minutes.
    • Using a diagnostic scan tool, carry out the EPB module self-test.

    Does DTC U3003:16 return? 

    Yes  GO to  A2
    No  The system is operating correctly at this time. The DTC may have set due to a previous low battery voltage condition.

  2. A2 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) IN THE PCM (POWERTRAIN CONTROL MODULE)

    • Ignition OFF.
    • Ignition ON.
    • Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

    Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in 1 or more modules AND are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM? 

    Yes  DIAGNOSE the PCM Diagnostic Trouble Codes (DTCs). Refer to: Electronic Engine Controls- 2.7L EcoBoost . Refer to: Electronic Engine Controls - 3.5L Duratec . Refer to: Electronic Engine Controls - 3.5L EcoBoost . Refer to: Electronic Engine Controls - 5.0L 32V Ti-VCT .
    No  GO to  A3

  3. A3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

    • Carry out the Battery Condition Test diagnostic routine. Refer to: Battery .

    Did the battery pass the condition test? 

    Yes  GO to  A4
    No  INSTALL a new battery. Refer to: Battery .

  4. A4 CHECK THE EPB (ELECTRIC PARKING BRAKE) MODULE SUPPLY VOLTAGE (VPWR_PBM$N) PID (PARAMETER IDENTIFICATION)

    • Ignition ON.
    • Measure and record the voltage at the battery.
    • Using a diagnostic scan tool, monitor the EPB module VPWR_PBM$N PID.

    Is the PID display within 0.2 volt of the recorded battery voltage? 

    Yes  GO to  A7
    No  GO to  A5

  5. A5 CHECK THE EPB (ELECTRIC PARKING BRAKE) MODULE VOLTAGE SUPPLY

    • Ignition OFF.
    • Disconnect EPB module C3675 .
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3675-13
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground
      C3675-15
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground
      C3675-22
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is each voltage within 0.2 volt of the recorded battery voltage? 

    Yes  GO to  A6
    No  VERIFY BJB fuses 57 (30A) and 58 (30A) are OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the cause of the circuit short.

  6. A6 CHECK THE EPB (ELECTRIC PARKING BRAKE) MODULE GROUND CIRCUITS FOR AN OPEN

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3675-28
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 Ground
      C3675-30
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances less than 3 ohms? 

    Yes  GO to  A7
    No  REPAIR the circuit.

  7. A7 VERIFY ALL WIRING CONNECTIONS

    • Ignition OFF.
    • Disconnect EPB module C3675 (if not previously disconnected).
    • Disconnect all in-line electrical connectors between the EPB module and the BJB.
    • Using a good light source, inspect all connectors for the following:
      • corrosion - install new connector or terminal and clean the module pins
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
      • spread terminals - install new terminals as necessary

    Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals? 

    Yes  GO to  A8
    No  REPAIR the connector or terminals. Refer to Connector Repair Procedures for schematic and connector information.

  8. A8 CHECK FOR CORRECT EPB (ELECTRIC PARKING BRAKE) MODULE OPERATION

    • Connect all in-line electrical connectors between the EPB module and the BJB. Make sure they seat and latch correctly.
    • Connect EPB module C3675 . Make sure it seats and latches correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new EPB module. Refer to: Parking Brake Module .
    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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