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Home >> Ford >> 2020 >> Escape Titanium Plug-In Hybrid >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Abs Guided Routine >> Pinpoint Tests >> Pinpoint Tests AE: ABS Module Communication Concern With PSCM >> Possible Causes
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Possible Causes

  1. AE1: 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 PSCM pass the Network Test? 
      Yes No
      RETRIEVE and RECORD all PSCM DTCs. REFER to the Power Steering article. If there are no DTCs in the PSCM, Go to  AE2. DIAGNOSE the PSCM does not communicate with the diagnostic scan tool. REFER to the Module Communications Network article.
  2. AE2: RECHECK THE ABS MODULE DTCS 
  3. AE3: CHECK FOR ABS MODULE VOLTAGE CONCERN DTCS 
    • Review the results from the recorded ABS module self-test.
    • Is DTC U3003:16 or U3003:17 present? 
      Yes No
      For DTC U3003:16, GO to PINPOINT TEST A .
      For DTC U3003:17, GO to PINPOINT TEST F .      		 Go to  AE4.
  4. AE4: CHECK THE PSCM FOR DTCS 

    Carry out the PSCM self-test.

    • Are any PSCM DTCs present? 
      Yes No
      DIAGNOSE the PSCM DTC. REFER to the Power Steering article. Go to  AE5.
  5. AE5: 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 PSCM or the 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  AE7. The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.
  6. AE6: VERIFY MODULE CONFIGURATION 
    • Ignition ON, engine OFF.
    • Using As-Built Data, configure the ABS module for trailer back up assist.
    • Using As-Built Data, configure the PSCM for trailer back up assist.
    • Operate the system and determine if the observable symptom is still present.
    • Is the concern still present? 
      Yes No
      Go to  AE7. The system is operating correctly at this time. The concern may have been due to an incorrect module configuration.
  7. AE7: CHECK FOR COMMUNICATION DTCS IN OTHER MODULES 
    • Ignition ON, engine OFF.
    • Retrieve the continuous memory DTCs.
    • Is DTC U0131:xx or U0420:xx set in 1 or more modules in addition to the ABS module? 
  8. AE8: VERIFY ABS MODULE OPERATION 
    • Ignition OFF.
    • ABS Module connector disconnected. (C155)
    • PSCM_A connector disconnected.
    • PSCM_B connector 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
    • PSCM_B connector connected. Make sure the connector seats and latches correctly.
    • PSCM_A connector connected. Make sure the connector seats and latches correctly.
    • ABS Module connector connected. (C155) Make sure the connector seats and latches correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
      Yes No
      INSTALL a new ABS module.
      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 ABS module. REFER to the Anti-Lock Brake System (ABS) and Stability Control article.
      ORDER a replacement ABS module and INCLUDE the RVC on the form.
      If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.      		 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.
  9. AE9: VERIFY ABS OPERATION 
    • Ignition OFF.
    • ABS_A Module connector disconnected. (C135A)
    • ABS_B Module connector disconnected. (C135B)
    • PSCM_A connector disconnected.
    • PSCM_B connector 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
    • PSCM_B connector connected. Make sure the connector seats and latches correctly.
    • PSCM_A connector connected. Make sure the connector seats and latches correctly.
    • ABS_B Module connector connected. (C135B) Make sure the connector seats and latches correctly.
    • ABS_A Module connector connected. (C135A) Make sure the connector seats and latches correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
      Yes No
      INSTALL a new EBB assembly.
      The HCU and ABS module are a single unit known as the EBB assembly.
      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 EBB assembly (HCU and ABS module). REFER to the Anti-Lock Brake System (ABS) and Stability Control article.
      ORDER a replacement EBB assembly and INCLUDE the RVC form.
      If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.      		 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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