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Pinpoint Test K : U0101:00

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.

  1. K1 VERIFY THE CUSTOMER CONCERN

    • Ignition ON.
    • Verify there is an observable symptom present.

    Is an observable symptom present? 

    Yes  GO to  K2.
    No  CLEAR the DTCs. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

  2. K2 CHECK THE COMMUNICATION NETWORK

    • Using a diagnostic scan tool, perform a network test.

    Do the SOD-L, SOD-R, BCM and PCM pass the network test? 

    Yes  GO to  K3.
    No  REFER to Module Communications Network .

  3. K3 CHECK THE BCM CMDTCs

    • Using a diagnostic scan tool, check the BCM CMDTCs.

    Are any CMDTCs present? 

    Yes  REFER to Multifunction Electronic Modules .
    No  GO to  K4.

  4. K4 RECHECK THE SOD-L OR SOD-R CMDTCs

    • Using a diagnostic scan tool, clear the SOD-L or SOD-R DTCs.
    • Operate the system and test for normal operation.
    • Check the SOD-L or SOD-R CMDTCs.

    Is the concern still present? 

    Yes  GO to  K5.
    No  CLEAR the DTCs. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

  5. K5 CHECK FOR LOST COMMUNICATION DTCs IN OTHER MODULES

    • Using a diagnostic scan tool, clear the CMDTCs from all modules.
    • Ignition OFF.
    • Ignition ON.
    • Wait at least 10 seconds.
    • Retrieve the CMDTCs from all modules.

    Is DTC U0101:00 or U0101:87 set in any other module? 

    Yes  GO to  K6.
    No  * If there is an observable symptom present, REFER to the Symptom Chart: Side And Rear Vision . * If there is no observable symptom, the system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

  6. K6 CHECK FOR CORRECT PCM OPERATION

    • Disconnect and inspect the PCM connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the PCM connectors. Make sure they seat and latch correctly.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new PCM. REFER to Electronic Engine Controls .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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