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Home >> Ford >> 2022 >> Edge ST >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Abs Guided Routine Testing - Pinpoint Tests D - ZA >> Abs Pinpoint Tests >> Pinpoint Tests Y: ABS Module Internal Fault Concern >> Possible Causes
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Possible Causes

Fig 1: Anti-Lock Brake System-A (ABS-A) Module Connector - C135A
G13726322Courtesy of FORD MOTOR CO.

Harness Side

Fig 2: Anti-Lock Brake System-B (ABS-B) Module Connector - C135B
G13726323Courtesy of FORD MOTOR CO.

Harness Side

  1. Y1: GUIDED DIAGNOSTIC QUESTION 
    • This step is for vehicles equipped with an EPB system or an EBB unit.
    • Were you sent here from diagnostics in the Parking Brake and Actuation article or the Power Brake Actuation article? 
  2. Y2: RECHECK THE ABS MODULE FOR DTCS 
    • Ignition ON, engine OFF.
    • Clear the ABS 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.
      NOTE: If DTC U3000:4B is present, allow the vehicle to cool for a minimum of 30 minutes.
    • Ignition ON, engine OFF.

    Carry out the ABS self-test.

    • Record the ABS module DTCs.
    • Are any of the DTCs from the Fault Trigger Conditions table present and active in the ABS module? 
    Yes No
    Go to  Y6. 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. Y3: RECHECK THE ABS MODULE FOR DTCS 
    • Ignition ON, engine OFF.
    • Clear the ABS DTCs.
    • Ignition ON, engine OFF.

    Carry out the ABS self-test.

    • Record the ABS module DTCs.
    • Are any of the DTCs from the Fault Trigger Conditions table present and active in the ABS module? 
    Yes No
    Go to  Y4. 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. Y4: VERIFY THE ABS MODULE TO HCU FASTENERS 
    • Ignition OFF.
    • Verify all ABS module-to-HCU fasteners are tightened to their correct torque specifications. Refer to the Anti-Lock Brake System (ABS) and Stability Control article.
    • Are the fasteners tightened to their correct torque specifications? 
    Yes No
    Go to  Y5. TIGHTEN all ABS module fasteners to their correct torque specifications.
    Go to  Y5.
  5. Y5: CHECK FOR CORRECT ABS MODULE OPERATION 
    • Ignition OFF.
    • ABS Module connector disconnected.
    • Using a good light source, inspect the electrical connector 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. Make sure the connector seats and latches 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 service articles address this concern, INSTALL a new ABS module. REFER to the Anti-Lock Brake System (ABS) and Stability Control 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.
  6. Y6: CHECK FOR CORRECT ABS MODULE OPERATION 
    NOTE: The battery must be removed to access the ABS module electrical connector.
    • Remove the battery. Refer to the appropriate procedure in the Battery, Mounting and Cables article.
    • 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.
    • ABS_A Module connector connected. (C135A)
    • ABS_B Module connector connected. (C135B)
    • Using a good light source, inspect the electrical connector 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_A Module connector connected. (C135A) Make sure the connector seats and latches correctly.
    • ABS_B Module connector connected. (C135B) Make sure the connector seats and latches correctly.
    • Install the battery. Refer to the appropriate procedure in the Battery, Mounting and Cables article.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    Yes No
    The HCU and ABS module are a single assembly known as the EBB unit.
    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 unit. REFER to the Anti-Lock Brake System (ABS) and Stability Control 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.
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