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Home >> Ford >> 2021 >> Expedition Platinum, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Auxiliary Brake System) >> Diagnosis And Testing >> Auxiliary Brake System - Vehicles With: Trailer Brake Control >> Pinpoint Tests >> Pinpoint Test E : U3003:17 >> Pinpoint Test E : U3003:17

Pinpoint Test E : U3003:17

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  1. E1 CHECK FOR HIGH VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES

    • Ignition ON.

    • Using a diagnostic scan tool, retrieve and record all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

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

    Yes  DIAGNOSE the charging system concern. REFER to: Charging System - 6.2L V8/6.8L Triton-30V - V10 . Or REFER to: Charging System - 6.7L Power Stroke Diesel .
    No  GO to  E2

  2. E2 CHECK THE BATTERY VOLTAGE

    • Turn off all interior lights, exterior lights and accessories.

    • NOTE: Do not allow the engine speed to increase above 2, 000 RPM while performing this step or the generator may self-excite and result in default charging system output voltage. If engine speed goes above 2, 000 RPM, turn the vehicle off and restart the engine before performing this step.

      Start and run the engine at approximately 1, 500 RPM for 3 minutes while monitoring the battery voltage.

    Is the battery voltage between 13 and 15.2 volts? 

    Yes  GO to  E3
    No  DIAGNOSE the overcharging condition. REFER to: Charging System - 6.2L V8/6.8L Triton-30V - V10 . Or REFER to: Charging System - 6.7L Power Stroke Diesel .

  3. E3 RECHECK FOR TBM (TRAILER BRAKE CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) U3003:17

    • Turn the engine off.

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the TBM self-test.

    • Clear the TBM Diagnostic Trouble Codes (DTCs).

    • Ignition OFF.

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the TBM self-test.

    Is DTC U3003:17 present? 

    Yes  GO to  E4
    No  The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

  4. E4 CHECK FOR CORRECT TBM (TRAILER BRAKE CONTROL MODULE) OPERATION

    • Disconnect TBM C2142 (if not previously disconnected).

    • Disconnect all in-line electrical connectors between the TBM 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

    • Connect all in-line electrical connectors between the TBM and the BJB. Make sure they seat and latch correctly.

    • Connect TBM C2142 . Make sure it seats and latches correctly.

    • Operate the system and verify 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 TBM. REFER to: Trailer Brake Control Module (TBM) .
    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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