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Home >> Ford >> 2021 >> Explorer Limited Hybrid, RWD >> Repair and Diagnosis (Single Page) >> Brakes >> Brakes Control Systems >> Abs Guided Routine - Pinpoint Tests G - ZA >> Pinpoint Tests T: SASM (Steering Angle Sensor Module) Communication Concern With BCM (Body Control Module) >> Possible Causes
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Possible Causes

  1. T1: CHECK THE COMMUNICATION NETWORK 
    • Ignition ON.
    • Using a diagnostic scan tool, retrieve the DTC  s from the vehicle.
      NOTE: DTC  s may be displayed from the previous diagnostic actions.

    Does the BCM pass the Network Test? 

    Yes No
    Diagnose all BCM DTCs. REFER to BODY CONTROL MODULE (BCM) . Go to  T2.
  2. T2: CHECK THE GWM (GATEWAY MODULE A) COMMUNICATION 
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the network test.
    • Using a diagnostic scan tool, retrieve the DTC  s from the vehicle.
      NOTE: DTC  s may be displayed from previous diagnostic actions.

    Does the GWM pass the network test? 

    Yes No
    DIAGNOSE the BCM does not communicate with the diagnostic scan tool. REFER to CONTROLLER AREA NETWORK (CAN) MODULE COMMUNICATIONS NETWORK . DIAGNOSE the GWM does not communicate with the diagnostic scan tool. REFER to CONTROLLER AREA NETWORK (CAN) MODULE COMMUNICATIONS NETWORK .
  3. T3: RECHECK THE SASM DIAGNOSTIC TROUBLE CODES (DTCS) 
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the SASM  self-test.
    • Record all SASM DTC  s.
    • Using a diagnostic scan tool, clear the SASM DTC  s.
    • Ignition OFF.
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the SASM  self-test.

    Are any of the DTCs listed in the Fault Trigger Conditions Table retrieved again? 

    Yes No
    Go to  T4. 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. T4: CHECK FOR VOLTAGE-RELATED DIAGNOSTIC TROUBLE CODES (DTCS) IN THE SASM (STEERING ANGLE SENSOR MODULE) 
    • Review the recorded DTCs from the SASM self-test.

    Are any U3003:xx DTCS present in the SASM? 

    Yes No
    DIAGNOSE all voltage DTCs. REFER to the SASM DTC  Chart in this article. Go to  T5.
  5. T5: CHECK FOR GATEWAY MODULE A (GWM) DIAGNOSTIC TROUBLE CODES (DTCS) 
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the GWM  module self-test.

    Are any GWM DIAGNOSTIC TROUBLE CODES (DTCs) present? 

    Yes No
    DIAGNOSE the GWM DTC. REFER to Module Communications Network article. Go to  T6.
  6. T6: CHECK FOR BCM (BODY CONTROL MODULE) DTCS (DIAGNOSTIC TROUBLE CODE) 
    • Using a diagnostic scan tool, carry out the BCM  self-test.
    • RECORD all DTC  s from the BCM  self-test.

    Are any BCM DTCs present? 

    Yes No
    DIAGNOSE the BCM DTC. REFER to BODY CONTROL MODULE (BCM) . Go to  T7.
  7. T7: 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 BCM  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 No
    Go to  T8. The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.
  8. T8: CHECK FOR COMMUNICATION DIAGNOSTIC TROUBLE CODES (DTCS) IN OTHER MODULES 
    • Ignition ON.
    • Using a diagnostic scan tool, clear the SASM DTC  s.
    • Using a diagnostic scan tool retrieve all Diagnostic Trouble Code (DTCs). Diagnostic Trouble Codes (DTCs) may be displayed from previous diagnostic actions

    Is DTC U0140:xx set in one or more modules in addition to the ABS module? 

    Yes No
    Go to  T9. Go to  T10.
  9. T9: CHECK FOR CORRECT BCM (BODY CONTROL MODULE) MODULE OPERATION 
    • Ignition OFF.
    • Disconnect All BCM  connectors if not previously disconnected.
    • 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 the BCM  module 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 No
    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 services articles address this concern, INSTALL a new BCM. REFER to BODY CONTROL MODULE (BCM) .    		 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. T10: CHECK FOR CORRECT SASM (STEERING ANGLE SENSOR MODULE) OPERATION 
    • Ignition OFF.
    • Disconnect SASM connector C2414A .
    • 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 SASM connector C2414A . Make sure the connectors seats and latches correctly.
    • Operate the system and verify the concern is still present.

    Is the concern still present? 

    Yes No
    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 and clockspring assembly. REFER to CLOCKSPRING , or CLOCKSPRING - VEHICLES WITH: ADAPTIVE STEERING .    		 The system is operating correctly at this time. The concern may have been caused by an incomplete or improper programming session.
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