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Pinpoint Test V : DTC U0140:00

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. V1 VERIFY THE CUSTOMER CONCERN

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

    Is an observable symptom present? 

    Yes  GO to  V2
    No  CLEAR the DTC. The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

  2. V2 CHECK THE COMMUNICATION NETWORK

    • Using a diagnostic scan tool, perform a network test.
    • Carry out the network test.

    Does the BCM pass the network test? 

    Yes  GO to  V3
    No  REFER to Module Communications Network .

  3. V3 PERFORM THE BCM SELF-TEST

    • Using a diagnostic scan tool, perform the BCM self-test.

    Are any DTCs recorded? 

    Yes  REFER to Multifunction Electronic Modules .
    No  GO to  V4

  4. V4 RECHECK THE HCM DTCs

    • Clear the HCM.
    • Wait 10 seconds.
    • Repeat the HCM self-test.

    Is DTC U0140:00 still present? 

    Yes  GO to  V5
    No  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. V5 CHECK FOR DTC U0140 SET IN OTHER MODULES

    • Clear all DTCs.
    • Ignition OFF.
    • Ignition ON.
    • Wait 10 seconds.
    • Using the diagnostic scan tool, perform self-test.
    • Retrieve the continuous memory DTCs from all modules.

    Is DTC U0140 set in another module? 

    Yes  GO to  V6
    No  GO to  V7

  6. V6 CHECK FOR CORRECT BCM OPERATION

    • Ignition OFF.
    • Disconnect and inspect all BCM connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the BCM connectors. 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, BCM Hardware Testing .
    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.

  7. V7 CHECK FOR CORRECT HCM OPERATION

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