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Home >> Audi >> 2018 >> A6 Premium Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 396 (Auxiliary Brake System) >> Diagnosis And Testing >> Auxiliary Brake System - Trailer Brake Control (TBC) Module >> Pinpoint Tests >> Pinpoint Test D : DTC U3003:17 >> Pinpoint Test D : DTC U3003:17

Pinpoint Test D : DTC U3003:17

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: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
NOTE: DTC B1317 may be stored in the module memory due to previous battery charging or vehicle jump starting events.

  1. D1 CHECK FOR HIGH VOLTAGE DTCS SET IN OTHER MODULES

    • Ignition ON.
    • Using a diagnostic scan tool, retrieve and record all CMDTCs from all modules.

    Is DTC B1317, B1676 or U3003:17 present in one or more modules AND are any charging system DTCs present in the PCM? 

    Yes  DIAGNOSE the overcharging condition, REFER to Charging System .
    No  GO to  D2.

  2. D2 CHECK THE BATTERY VOLTAGE

    • Turn off all interior/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 2, 000 rpm for 3 minutes while monitoring the battery voltage.

    Is the battery voltage between 13 and 15.2 volts ? 

    Yes  GO to  D3.
    No  DIAGNOSE the vehicle charging concern, REFER to Charging System .

  3. D3 RECHECK FOR TBC MODULE DTC U3003:17

    • Turn the engine off.
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the TBC module self-test.
    • Clear the TBC module DTCs.
    • Ignition OFF.
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the TBC module self-test.

    Is DTC U3003:17 present? 

    Yes  GO to  D4.
    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. D4 CHECK FOR CORRECT TBC MODULE OPERATION

    • Disconnect and inspect the TBC module connector.
    • Repair:
      • corrosion (install new connector or terminal - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Connect the TBC module connector, 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new TBC module. REFER to Trailer Brake Control (TBC) 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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