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Home >> Ford >> 2018 >> Focus ST >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Abs Guided Routine Testing >> Pinpoint Tests >> Pinpoint Test AV: ABS Module Communication Concern With The GSM >> Possible Causes
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Possible Causes

  1. AV1: 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 GSM pass the network test? 
    Yes No
    Go to  AV2. DIAGNOSE the no communication with the GSM. REFER to COMMUNICATIONS NETWORK
  2. AV2: RECHECK FOR THE ABS MODULE DTCS 
    • Carry out the ABS self-test.
    • Ignition OFF.
    • Ignition ON, engine OFF.
    • Carry out the ABS self-test.
    • Record all ABS module DTCs.
    • Is DTC U0103:xx retrieved again? 
    Yes No
    Go to  AV3. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
  3. AV3: CHECK FOR VOLTAGE DTCS IN THE ABS MODULE 
    • Review the recorded DTCs from the ABS module self-test.
    • Is DTC U3003:16 or U3003:17 present? 
    Yes No
    For DTC U3003:17, GO to PINPOINT TEST F .
    For DTC U3003:16, GO to PINPOINT TEST A .    		 Go to  AV4.
  4. AV4: CHECK FOR DTCS IN THE GSM 
    • Carry out the GSM self-test.
    • Record all DTCs from the GSM self-test.
    • Are any DTCs present? 
    Yes No
    DIAGNOSE the GSM DTCs. REFER to appropriate Diagnosis and Testing in Automatic Transmission External Controls article. Go to  AV5.
  5. AV5: 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 AWD module or ABS module. 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  AV6. The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.
  6. AV6: VERIFY ALL WIRING CONNECTIONS 
    • Ignition OFF.
    • Disconnect the ABS module connector.
    • Disconnect the GSM connector.
    • Disconnect all in-line electrical connectors between the ABS module and the GSM.
    • 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
    • Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals? 
    Yes No
    Go to  AV7. REPAIR the connector or terminals. Refer to OEM CONNECTOR REPAIR PROCEDURES (EXCEPT ELECTRIC) , for schematic and connector information.
  7. AV7: CHECK FOR DTC U0103:XX SET IN OTHER MODULES 
    • Connect the GSM electrical connector. Make sure it seats and latches correctly.
    • Connect the ABS module connector. Make sure it seats and latches correctly.
    • Connect all in-line electrical connectors between the ABS module and the GSM. Make sure they seat and latch correctly.
    • Ignition ON, engine OFF.
    • Press the Read Vehicle Information button to view the results of the continuous DTCs set in other modules.
    • Retrieve the continuous memory DTCs.
    • Review the CMDTCs from all modules.
    • Is DTC U0256:xx set in other modules in addition to the ABS module? 
    Yes No
    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 GSM. REFER to Automatic Transmission External Controls article    		 INSTALL a new ABS module.
    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 ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
    ORDER a replacement ABS module and INCLUDE the RVC form.
    If this is a Ford repair, INCLUDE the RVC on the warranty claim form.
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