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Pinpoint Test I: U0184:87

WARNING: This page is about a different car, the 2021 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to MODULE COMMUNICATIONS NETWORK for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Communications Network - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    BCM U0184:87 Lost Communication With Radio: Missing Message A continuous memory DTC that sets in the BCM if messages from the ACM through the GWM are missing.

    Possible Sources 

    • Communication network concern
    • Battery voltage concern
    • GWM concern
    • ACM
    • BCM

  2. NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during the PMI or the PMI may not have been carried out.

  3. I1 CHECK THE COMMUNICATION NETWORK

    • Connect the diagnostic tool.

    • Ignition ON.

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

    Does the ACM pass the network test? 

    Yes  GO to  I2
    No  REFER to: Communications Network

  4. I2 CHECK THE BCM (BODY CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).

    • Wait 10 seconds.

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

    Is DTC U3006:16 or U3006:17 recorded? 

    Yes  For DTC U3006:16, GO to Pinpoint Test X  For DTC U3006:17, GO to Pinpoint Test Z 
    No  GO to  I3

  5. I3 RETRIEVE THE ACM (AUDIO FRONT CONTROL MODULE) DTCS

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

    Are any ACM system related DTCs present? 

    Yes  REFER to: Information and Entertainment System
    No  GO to  I4

  6. I4 RECHECK THE BCM (BODY CONTROL MODULE) CMDTCS

    • Using a diagnostic scan tool, clear the DTCs.

    • Wait 10 seconds.

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

    Is DTC U0184:87 still present? 

    Yes  GO to  I5
    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.

  7. I5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0184:87 SET IN OTHER MODULES

    • Using a diagnostic scan tool, clear the DTCs.

    • Ignition OFF.

    • Ignition ON.

    • Wait 10 seconds.

    • Using a diagnostic scan tool, retrieve all 

      CMDTCs.

    Is DTC U0184:87 set in other modules? 

    Yes  GO to  I6
    No  GO to  I7

  8. I6 CHECK FOR CORRECT ACM (AUDIO FRONT CONTROL MODULE) OPERATION

    • Disconnect and inspect the ACM 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 ACM 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 service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, Click here to refer to APIM GUIDED ROUTINE .
    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.

  9. I7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • 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 service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM. REFER to: Body Control Module (BCM) 
    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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