LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2023 >> Escape ST-Line Select >> Repair and Diagnosis >> External Pages >> Different car >> Section 1687 (Abs Guided Routine Testing - Pinpoint Tests C - CZ) >> Abs Pinpoint Tests >> Pinpoint Tests CZ: SASM Communication Concern With FCIM >> Possible Causes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Possible Causes

WARNING: This page does not describe the selected car, but rather 38 other vehicles, including the 2024 Ford F-550 Super Duty, 2024 Ford F-450 Super Duty, 2024 Ford F-350 Super Duty, 2024 Ford F-250 Super Duty, and 2023 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
  1. CZ1: CHECK THE COMMUNICATION NETWORK 
    • Ignition ON, engine OFF.
    • Press the Read Vehicle Information button to view the results of the modules communicating on the network.
    • Retrieve the continuous memory DTCs.
    • Does the FCIM pass the network test? 
    Yes No
    Go to  CZ2. DIAGNOSE the FCIM does not communicate with the diagnostic scan tool. REFER to the Module Communications Network article.
  2. CZ2: CHECK THE GWM COMMUNICATION 
    • Ignition ON, engine OFF.
    • Press the Read Vehicle Information button to view the results of the modules communicating on the network.
    • Retrieve the continuous memory DTCs.
    • Does the GWM pass the network test? 
    Yes No
    Go to  CZ3. DIAGNOSE the GWM does not communicate with the diagnostic scan tool. REFER to the Module Communications Network article.
  3. CZ3: RECHECK FOR THE SASM DTCS 

    Carry out the SASM self-test.

    • Clear the SASM DTCs.
    • Put the ABS module in sleep mode by performing the following steps:
      • With ALL doors closed, set the ignition from ON to OFF.
      • Disconnect the diagnostic scan tool.
      • Open the door, exit the vehicle and close the door.
      • Wait a minimum of 90 seconds for the ABS module to enter sleep mode.
    • Ignition ON, engine OFF.

    Carry out the SASM self-test.

    • Record the SASM DTCs.
    • Is DTC U0557:xx retrieved again? 
    Yes No
    Go to  CZ4. 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. CZ4: CHECK FOR VOLTAGE DTCS IN THE SASM 
    • Review the recorded DTCs from the SASM self-test.
    • Is DTC U3003:17 or U3003:1C present? 
    Yes No
    For DTC U3003:17, GO to PINPOINT TEST BE .
    For DTC U3003:1C, GO to PINPOINT TEST BD .    		 Go to  CZ5.
  5. CZ5: RETRIEVE ALL DTCS FROM THE GWM 

    Carry out the GWM self-test.

    • Record the DTCs from the GWM self-test.
    • Are any DTCs present? 
    Yes No
    DIAGNOSE the GWM DTCs. REFER to the Module Communications Network article. Go to  CZ6.
  6. CZ6: RETRIEVE ALL DTCS FROM THE FCIM 

    Carry out the FCIM self-test.

    • Record the DTCs from the FCIM self-test.
    • Are any DTCs present? 
    Yes No
    DIAGNOSE the FCIM DTCs. REFER to the appropriate Information and Entertainment Systems article. Go to  CZ7.
  7. CZ7: 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 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  CZ8. The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.
  8. CZ8: CHECK FOR COMMUNICATION DTCS IN OTHER MODULES 
    • Ignition ON, engine OFF.
    • Retrieve the continuous memory DTCs.
    • Is DTC U0256:xx or U0557:xx set in 1 or more modules in addition to the SASM? 
    Yes No
    Go to  CZ9. Go to  CZ10.
  9. CZ9: VERIFY FCIM OPERATION 
    • Ignition OFF.
    • Disconnect all FCIM electrical connectors.
    • Disconnect all SASM 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 SASM electrical connectors. Make sure they seat and latch correctly.
    • Connect all FCIM electrical connectors. Make sure they seat and latch 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 services articles address this concern, INSTALL a new FCIM. REFER to the appropriate Information and Entertainment Systems article.    		 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. CZ10: VERIFY SASM OPERATION 
    • Ignition OFF.
    • Disconnect all FCIM electrical connectors.
    • Disconnect all SASM 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 FCIM electrical connectors. Make sure they seat and latch correctly.
    • Connect all SASM electrical connectors. Make sure they seat and latch 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 services articles address this concern, INSTALL a new SASM-clockspring assembly. REFER to the Supplemental Restraint System article.    		 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.
scientia non olet · About LEMON Manuals