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Home >> Audi >> 2010 >> S4 Automatic DCT >> Repair and Diagnosis >> External Pages >> Different car >> Section 875 (Information And Entertainment Systems - Am/Fm/Cd) >> Diagnosis And Testing >> Information and Entertainment System >> Pinpoint Tests >> Pinpoint Test Aa : DTC U0140 >> Pinpoint Test Aa : DTC U0140

Pinpoint Test Aa : DTC U0140

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. AA1 VERIFY THE CUSTOMER'S CONCERN

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

    Is an observable symptom present? 

    Yes  GO to  AA2.
    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.

  2. AA2 CHECK THE COMMUNICATION NETWORK

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

    Does the BCM pass the network test? 

    Yes  GO to  AA3.
    No  REFER to Module Communications Network .

  3. AA3 RETRIEVE THE BCM DTCs

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

    Are any non-network DTCs recorded in the BCM ? 

    Yes  GO to  AA4.
    No  REFER to Multifunction Electronic Modules .

  4. AA4 RECHECK FOR DTC U0140

    • Using a diagnostic scan tool, clear all CMDTCs.
    • Ignition OFF.
    • Ignition ON.
    • Wait at least 10 seconds.
    • Using a diagnostic scan tool, retrieve the APIM and ACM CMDTCs.

    Is DTC U0140 still set in the APIM or ACM ? 

    Yes  GO to  AA5.
    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. AA5 RETRIEVE THE RECORDED DTCs FROM THE APIM AND ACM SELF-TEST

    • Using a diagnostic scan tool, perform the self-test for the following modules:
      • APIM
      • ACM

    Are any non-network DTCs recorded? 

    Yes  REFER to the DTC Charts .
    No  GO to  AA6.

  6. AA6 CHECK FOR DTC U0140 SET IN MULTIPLE MODULES

    • Review the CMDTCs from all modules.

    Is DTC U0140 set in more than one module? 

    Yes  GO to  AA7.
    No  If there is an observable symptom, REFER to the Symptom Charts  to diagnose the observed symptom.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.

  7. AA7 CHECK FOR CORRECT BCM OPERATION

    • Ignition OFF.
    • Disconnect and inspect all the BCM connectors and related in-line connectors.
    • Repair:
      • Corrosion (clean module pins or install new connectors or terminals)
      • Damaged or bent pins (install new terminals or pins)
      • Pushed-out pins (install new pins as necessary)
    • Reconnect the BCM connectors and related in-line 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.
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