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Home >> Ford >> 2017 >> Explorer Sport >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System Component Testing >> Pinpoint Tests >> Pinpoint Tests AI: ABS Module Communication Concern With PCM >> Possible Causes
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Possible Causes

Fig 1: Antilock Braking System (ABS) Module Connector - C135
GFDW79032Courtesy of FORD MOTOR COMPANY

Harness Side

  1. AI1: CHECK THE PCM 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 PCM pass the Network Test? 
      Yes No
      Go to  AI2. DIAGNOSE the diagnostic scan tool does not communicate with the PCM. REFER to COMMUNICATIONS NETWORK .
  2. AI2: CHECK THE GWM 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 GWM pass the Network Test? 
      Yes No
      Go to  AI3. DIAGNOSE the diagnostic scan tool does not communicate with the GWM. REFER to COMMUNICATIONS NETWORK .
  3. AI3: RECHECK THE ABS MODULE FOR THE LOST COMMUNICATION DTC 
    • Clear the ABS DTCs.
    • Ignition OFF.
    • Ignition ON, engine OFF.
    • Carry out the ABS self-test.
    • Is DTC U0100:xx or U0401:xx still present? 
      Yes No
      Go to  AI4. 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. AI4: REVIEW THE ABS MODULE SELF-TEST FOR VOLTAGE-REALTED DTCS 
    • Review the results from the 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  AI5.
  5. AI5: CHECK FOR GWM DTCS 
  6. AI6: CHECK FOR PCM DTCS 
    • Carry out the PCM KOEO self-test.
    • Are any DTCs present? 
      Yes No
      DIAGNOSE the PCM DTC. REFER to the appropriate Electronic Engine Controls article. Go to  AI7.
  7. AI7: 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 PCM 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  AI8. The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.
  8. AI8: CHECK FOR COMMUNICATION DTCS IN OTHER MODULES 
    • Ignition ON, engine OFF.
    • Retrieve the continuous memory DTCs.
    • Is DTC U0100:xx or U0401:xx set in 1 or more modules in addition to the ABS module? 
      Yes No
      Go to  AI9. Go to  AI10.
  9. AI9: VERIFY PCM OPERATION 
    • Ignition OFF.
      NOTE: The battery must be removed to access the ABS module electrical connector.
    • Remove the battery. Refer to the BATTERY
    • PCM_B connector disconnected.
    • PCM_E connector disconnected.
    • GWM connector disconnected.
    • ABS Module connector disconnected. (C135)
    • 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
    • ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
    • GWM connector connected. Make sure the connector seats and latches correctly.
    • PCM_E connector connected. Make sure the connector seats and latches correctly.
    • PCM_B connector connected. Make sure the connector seats and latches correctly.
    • Install the battery. Refer to the BATTERY .
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
      Yes No
      INSTALL a new PCM.
      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 PCM. REFER to the appropriate Electronic Engine Controls 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.
      If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.
  10. AI10: VERIFY ABS MODULE OPERATION 
    • Ignition OFF.
      NOTE: The battery must be removed to access the ABS module electrical connector.
    • Remove the battery. Refer to the BATTERY .
    • ABS Module connector disconnected. (C135)
    • GWM connector disconnected.
    • PCM_B connector disconnected.
    • PCM_E 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
    • PCM_E connector connected. Make sure the connector seats and latches correctly.
    • PCM_B connector connected. Make sure the connector seats and latches correctly.
    • GWM connector connected. Make sure the connector seats and latches correctly.
    • ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
    • Install the battery. Refer to the BATTERY .
    • 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 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 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.
      If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.
  11. AI11: VERIFY ABS OPERATION 
    • Ignition OFF.
      NOTE: The battery must be removed to access the ABS module electrical connector.
    • Remove the battery. Refer to the BATTERY .
    • ABS Module connector disconnected. (C135)
    • GWM connector disconnected.
    • PCM_B connector disconnected.
    • PCM_E 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
    • PCM_E connector connected. Make sure the connector seats and latches correctly.
    • PCM_B connector connected. Make sure the connector seats and latches correctly.
    • GWM connector connected. Make sure the connector seats and latches correctly.
    • ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
    • Install the battery. Refer to the BATTERY .
    • 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 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 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.
      If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.
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