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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 ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, clear the ABS module Diagnostic Trouble Codes (DTCs).
    • Ignition OFF.
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the ABS module self-test.

    Is DTC U3003:16 still present? 

    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)

    • 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). 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 REFER to: ELECTRONIC ENGINE CONTROLS .
    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 ABS (ANTI-LOCK BRAKE SYSTEM) MODULE VOLTAGE (VPWR_ABS) PID (PARAMETER IDENTIFICATION)

    • Ignition ON.
    • Measure and record the voltage at the battery.
    • Using a diagnostic scan tool, monitor the VPWR_ABS 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 ABS (ANTI-LOCK BRAKE SYSTEM) MODULE VOLTAGE SUPPLY

    • Ignition OFF.
    • Disconnect ABS module C135 .
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C135-1
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-25
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-28
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground

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

    Yes  GO to  A6
    No  VERIFY AJB fuses 11 (60A), 61 (30A) and 107 (10A) are OK. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the cause of the circuit short. If OK, REPAIR the affected circuit for high resistance or an open.

  6. A6 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE GROUND CIRCUIT FOR AN OPEN

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C135-13
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-38
      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 ABS module C135 .
    • Disconnect all in-line electrical connectors between the ABS module and the BJB.
    • Using a good light source, inspect all disconnected electrical 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

    Is the connector 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 ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

    • Connect ABS module C135 . Make sure it seats and latches correctly.
    • Connect all in-line electrical connectors between the ABS module and the BJB. 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 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 ABS module. REFER to: Anti-Lock Brake System (ABS) 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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