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Pinpoint Test AZ: SASM (Steering Angle Sensor Module) Communication Concern With The SECM (Steering Effort Control Module)

  1. Refer to VEHICLE DYNAMIC SYSTEMS for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .

    The SECM receives power and ground from the SASM. The power, ground and communication circuits all pass through the clockspring. With the ignition ON, the SECM sends messages through the clockspring to the SASM over a private CAN. If the SASM does not receive these messages within a certain time frame, the module sets Diagnostic Trouble Codes (DTCs). This can be due to a SECM failure, a clockspring failure, a SASM failure, a circuit failure on the CAN network or an excessive load on the network.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    SASM U0130:00 Lost Communication With Steering Effort Control Module: No Sub Type Information Sets if the SASM detects any of the SECM messages are missing.
    SASM U0419:81 Invalid Data Received From Steering Effort Control Module: Invalid Serial Data Received Sets when the SASM receives invalid adaptive front steering startup or shutdown information from the SECM.

    Possible Sources 

    • Wiring, terminals or connectors
    • Network communication concern
    • SECM
    • SASM

  2. AZ1 CHECK THE SECM (STEERING EFFORT CONTROL MODULE) COMMUNICATION

    • Ignition ON.

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

      No VCM Recognized

    Does the SECM communicate with the diagnostic scan tool and return DTCs ' 

    Yes  RETRIEVE and RECORD all SECM DTCs. REFER to: Adaptive Steering . If there are no DTCs in the GWM, GO to  AZ2.
    No  GO to  AZ4

  3. AZ2 RECHECK THE SASM (STEERING ANGLE SENSOR MODULE) FOR THE LOST COMMUNICATION DTC (DIAGNOSTIC TROUBLE CODE)

    • Using a diagnostic scan tool, CLEAR the SASM DTCs.

      No VCM Recognized

    • Ignition OFF.

    • Ignition ON.

    NOTE: When retrieving DTCs, ignore all historical or continuous memory DTCs.

    No VCM Recognized

    Are any of the DTCs listed in the DTC Fault Trigger Conditions table present and active in the SASM ' 

    Yes  GO to  AZ3.
    No  For all other SASM DTCs, GO to the SASM DTC Chart in this article.If there are no DTC s present, 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. AZ3 REVIEW THE SASM (STEERING ANGLE SENSOR MODULE) SELF-TEST FOR VOLTAGE-REALTED DTCS

    • Review the results from the SASM self-test.

    Is DTC U3003:17 present? 

    Yes  GO to Pinpoint Test BE 
    No  GO to  AZ7

  5. AZ4 CHECK THE SASM (STEERING ANGLE SENSOR MODULE) FOR VOLTAGE

    NOTE: This step puts a load on the SASM voltage supply circuit. If there are corroded or loose connections, loading the circuit may help show the fault. A 9006 or 9007 headlamp bulb is an effective load.

    • Ignition OFF.

    • Remove the steering column shrouds.

    • Ignition ON.

    Measure the voltage between:

    Positive Lead Measurement / Action Negative Lead
    GFD795705Courtesy of FORD MOTOR COMPANY
    GFD795702Courtesy of FORD MOTOR COMPANY
    GFD795706Courtesy of FORD MOTOR COMPANY

    • Record the measured battery voltage.

    • Connect the load to a suitable ground connection.

    • Connect the load to each circuit before taking the voltage measurement.

    Measure the voltage between:

    Positive Lead Measurement / Action Negative Lead
    C2414A Pin 4
    GFD795702Courtesy of FORD MOTOR COMPANY
    GFD795703Courtesy of FORD MOTOR COMPANY
    C2414A Pin 5
    GFD795702Courtesy of FORD MOTOR COMPANY
    GFD795703Courtesy of FORD MOTOR COMPANY

    Is each voltage within 0.5 volt of the recorded battery voltage? 

    Yes  GO to  AZ5
    No  VERIFY all fuses in the BJB are OK. Refer to POWER STEERING CONTROLS for schematic and connector information.If the fuses are OK, REPAIR the circuit in question for high resistance or an open.If the fuses are NOT OK, REFER to OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to determine the cause of the circuit short.

  6. AZ5 CHECK THE SASM GROUND CIRCUIT FOR AN OPEN

    NOTE: This step puts a load on the ABS module voltage supply circuit. If there are corroded or loose connections, loading the circuit may help show the fault. A 9006 or 9007 headlamp bulb is an effective load.

    • Ignition OFF.

    • Connect the load to a suitable, fused 12-volt power connection.

    • Connect the load to each circuit before taking the voltage measurement.

    Measure the voltage between:

    Positive Lead Measurement / Action Negative Lead
    C2414A Pin 1
    GFD795702Courtesy of FORD MOTOR COMPANY
    GFD795703Courtesy of FORD MOTOR COMPANY

    Is the voltage drop less than 0.5 volt? 

    Yes  GO to  AZ6
    No  REPAIR the circuit.

  7. AZ6 CHECK THE RCM FOR DIAGNOSTIC TROUBLE CODES (DTCS)

    • Connect SASM C2414A. Make sure the connector seats and latches correctly..

    • Ignition ON.

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

    Are there any clockspring Diagnostic Trouble Codes (DTCs) present in the RCM ' 

    Yes  DIAGNOSE the clockspring Diagnostic Trouble Codes (DTCs). REFER to: AIRBAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS) .
    No  GO to  AZ7

  8. AZ7 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 SECM or the SASM. 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  AZ8.
    No  The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

  9. AZ8 CHECK FOR COMMUNICATION DTCS IN OTHER MODULES

    • Ignition ON.

    • NOTE: When retrieving DTCs, ignore all historical or continuous memory DTCs.

      Using a diagnostic scan tool, carry out a Network Test.

      No VCM Recognized

    Is any DTC from the Fault Trigger Conditions Table set in 1 or more modules in addition to the ABS module? 

    Yes  GO to  AZ9.
    No  GO to  AZ10

  10. AZ9 VERIFY SECM (STEERING EFFORT CONTROL MODULE) OPERATION

    • Ignition OFF.

    • 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

    • Install the clockspring. REFER to: CLOCKSPRING . Make sure all connectors seat and latch correctly.

    • Connect SASM C2414A. Make sure the connector seats and latches correctly..

    • Install the steering column shrouds.

    • 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 instructions.If 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.

  11. AZ10 VERIFY SASM (STEERING ANGLE SENSOR MODULE) OPERATION

    • Ignition OFF.

    • 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

    • Install the clockspring. REFER to: CLOCKSPRING . Make sure all connectors seat and latch correctly.

    • Connect SASM C2414A. Make sure the connector seats and latches correctly..

    • Install the steering column shrouds.

    • 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 instructions.If no service articles address this concern, INSTALL a new SASM. REFER to: Steering Column Control Module (SCCM) - 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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