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Pinpoint Test Ac: Invalid Data Received From Front Controls Interface Module

  1. Normal Operation and Fault Conditions 

    With the ignition ON, the FCIM sends messages to the GWM over the MS-CAN. The GWM relays these messages to the SECM over the HS-CAN2 and through the SASM. If the SECM does not receive these messages within a certain time frame, the SECM sets a DTC. For information on the messages sent to the SECM by the FCIM, refer to the Network Message Chart in the Description and Operation in the Power Steering article.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    SECM U0557:00 Invalid Data Received From Front Controls Interface Module 'A': No Sub Type Information This DTC sets if the SECM receives invalid data in any of the FCIM messages.

    Possible Sources 

    • Network communication concern
    • Charging system concern
    • SASM
    • FCIM
    • SECM

  2. AC1 CHECK THE COMMUNICATION NETWORK

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the Network test.

    Do the FCIM and the SASM pass the Network Test? 

    Yes  GO to  AC2
    No  DIAGNOSE the no communication with the FCIM or the SASM. REFER to: Controller Area Network (CAN) Module Communications Network .

  3. AC2 CHECK THE SECM CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

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

    • Ignition OFF.

    • Ignition ON.

    • Wait at least 20 seconds for the SECM to validate the adaptive steering system.

    • Using a diagnostic scan tool, carry out the SECM self-test.

    • Record the all SECM Diagnostic Trouble Codes (DTCs).

    Is DTC U0557:00 retrieved again? 

    Yes  GO to  AC3
    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.

  4. AC3 CHECK FOR SECM DTC U3003:16 AND U3003:17

    • Review the results from the SECM self-test.

    Is DTC U3003:16 or U3003:17 present in the SECM ' 

    Yes  For DTC U3003:16, GO to Pinpoint Test A  For DTC U3003:17, GO to Pinpoint Test B 
    No  GO to  AC4

  5. AC4 CHECK FOR DTCS IN THE SASM

    • Using a diagnostic scan tool, carry out the SASM self-test.

    Are any Diagnostic Trouble Codes (DTCs) present in the SASM ' 

    Yes  DIAGNOSE all SASM Diagnostic Trouble Codes (DTCs). REFER to: Anti-Lock Brake System (ABS) and Stability Control .
    No  GO to  AC5

  6. AC5 CHECK FOR DTCS IN THE FCIM

    • Using a diagnostic scan tool, carry out the FCIM self-test.

    Are any Diagnostic Trouble Codes (DTCs) present in the FCIM ' 

    Yes  DIAGNOSE all FCIM Diagnostic Trouble Codes (DTCs). REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) .
    No  GO to  AC6

  7. AC6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

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

    • Check the vehicle service history for recent service actions related to the FCIM, the SASM and the SECM. If recent service history is found:

      • verify the correct replacement module was installed (HVBOM may be used to verify correct part fitment).

      • verify the configuration of replacement module was correct (re-configure the module using as-built data if prior configuration is suspect).

      • verify the module was not obtained from a like vehicle and installed into customer vehicle (return the swapped module to source vehicle and obtain new replacement module).

    • Operate the system and determine if the observable symptom is still present.

    Is the observable symptom still present? 

    Yes  GO to  AC7
    No  The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

  8. AC7 CHECK FOR COMMUNICATION DTCS IN OTHER MODULES

    • Ignition ON.

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

    • Using a diagnostic scan tool, retrieve and record all Diagnostic Trouble Codes (DTCs) from all modules.

    Is DTC U0557:xx present in 1 or more modules in addition to the SECM ' 

    Yes  GO to  AC8
    No  GO to  AC9

  9. AC8 VERIFY FCIM OPERATION

    • Ignition OFF.

    • Disconnect all SECM electrical connectors.

    • Disconnect all FCIM electrical connectors.

    • Using a good light source, inspect all disconnected electrical connectors for the following:

      • corrosion - install new connector or terminal and clean the module pins
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
      • spread terminals - install new terminals as necessary

    • Connect all SECM electrical connectors. Make sure the connectors seat and latch correctly.

    • Connect all FCIM electrical connectors. Make sure the connectors seat and latch correctly.

    • Operate the system and verify the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any service articles: TSB, GSB, SSM or FSA.If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructionsIf no service articles address this concern, INSTALL a new FCIM. REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control 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.

  10. AC9 VERIFY SECM OPERATION

    • Ignition OFF.

    • Disconnect all SECM electrical connectors.

    • Disconnect all FCIM electrical connectors.

    • Using a good light source, inspect all disconnected electrical connectors for the following:

      • corrosion - install new connector or terminal and clean the module pins
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
      • spread terminals - install new terminals as necessary

    • Connect all SECM electrical connectors. Make sure the connectors seat and latch correctly.

    • Connect all FCIM electrical connectors. Make sure the connectors seat and latch correctly.

    • Operate the system and verify the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any service articles: TSB, GSB, SSM or FSA.If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructionsIf no service articles address this concern, INSTALL a new SECM. REFER to: Steering Wheel - Vehicles With: Adaptive Steering .
    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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