LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2018 >> Focus ST >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Abs Guided Routine Testing >> Pinpoint Tests >> Pinpoint Test AM: Brake Pressure Sensor Fault >> Possible Causes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Possible Causes

  1. AM1: CHECK FOR DTC C0040:64, U3003:16 OR U3003:17 
    • Review the results from the ABS module self-test.
    • Is DTC C0040:64, U3003:16 or U3003:17 present? 
    Yes No
    For DTC C0040:64, GO to PINPOINT TEST AC .
    For DTC U3003:16, GO to PINPOINT TEST A .
    For DTC U3003:17, GO to PINPOINT TEST F .
    Go to  AM2.
  2. AM2: RECHECK FOR THE ABS MODULE DTCS 
    • Ignition ON, engine OFF.
    • Clear the ABS DTCs.
    • Ignition OFF.
    • Ignition ON, engine OFF.
    • Carry out the ABS self-test.
    • Are any DTCs shown in the ABS DTC Fault Trigger Conditions table present? 
    Yes No
    Go to  AM4. The system is operating correctly. The concern may have been caused by a temporary condition.
  3. AM3: CALIBRATE THE ABS MODULE 
    NOTE: The vehicle must be on level ground and at a complete standstill during Interactive Vehicle Dynamics (IVD) Initialization. Any vehicle movement results in false values for this test.
    • Using a diagnostic scan tool, carry out the IVD Initialization routine. Follow the diagnostic scan tool directions.
    • Ignition OFF.
    • Ignition ON, engine OFF.
    • Clear the ABS DTCs.
    • Ignition OFF.
    • Ignition ON, engine OFF.
    • Carry out the ABS self-test.
    • Is DTC C0044:54 present? 
    Yes No
    Go to  AM6. If DTC
    C0044:47, C0044:49, C0044:51, C0044:54, C0044:64, C0044:8F or C1A08:1C is present, Go to  AM4.
    For all others, GO to the ABS - ANTILOCK BRAKING SYSTEM DTC INDEX .
  4. AM4: CHECK THE ABS MODULE-TO-HCU FASTENERS 
    • Ignition OFF.
    • Verify all ABS module-to-HCU fasteners are tightened to specifications. Refer to ABS Module Removal and Installation in REMOVAL AND INSTALLATION
    • Ignition ON, engine OFF.
    • Clear the ABS DTCs.
    • Ignition OFF.
    • Ignition ON, engine OFF.
    • Carry out the ABS self-test.
    • Is DTC C0044:49 or C0044:8F present? 
    Yes No
    Go to  AM7. The system is operating correctly. The concern may have been cause by a loose fastener.
    If DTC C0044:47, C0044:51 or C1A08:1C is present in Escape/Kuga, Go to  AM8.
    If DTC C0044:47, C0044:51 or C1A08:1C is present in all other vehicles, Go to  AM6.
    If DTC C0044:64 is present, Go to  AM5.
    For all others, No fault found.
    GO to the ABS - ANTILOCK BRAKING SYSTEM DTC INDEX .
  5. AM5: BLEED THE BRAKE SYSTEM AND RECHECK FOR DTC C0044:64 
    • Inspect the brake tubes and connections for damage and leaks. Repair or install new brake tubes as necessary.
    • Bleed the brake system. Refer to BRAKE SYSTEM - GENERAL INFORMATION (EXCEPT ELECTRIC) .
    • Ignition ON, engine OFF.
    • Clear the ABS DTCs.
    • Ignition OFF.
    • Ignition ON, engine OFF.
    • Carry out the ABS self-test.
    • Is DTC C0044:64 still present? 
    Yes No
    Go to  AM6. The system is operating correctly. The concern may have been cause by air in the system.
  6. AM6: CHECK FOR CORRECT ABS MODULE OPERATION 
    • Ignition OFF.
    • ABS Module connector disconnected.
    • Inspect all disconnected electrical connectors for the following:
      • corrosion - install new connector or terminal - clean 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.
    • 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 REMOVAL AND INSTALLATION
    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.
  7. AM7: CHECK FOR CORRECT HCU OPERATION 
    • Ignition OFF.
    • ABS Module connector disconnected.
    • Inspect all disconnected electrical connectors for the following:
      • corrosion - install new connector or terminal - clean 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.
    • Is the concern still present? 
    Yes No
    INSTALL a new HCU.
    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 HCU. REFER to REMOVAL AND INSTALLATION
    ORDER a replacement HCU 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.
  8. AM8: CHECK FOR CORRECT ABS OPERATION 
    • Ignition OFF.
    • ABS Module connector disconnected.
    • Inspect all disconnected electrical connectors for the following:
      • corrosion - install new connector or terminal - clean 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.
    • 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 and HCU assembly. REFER to REMOVAL AND INSTALLATION
    ORDER a replacement ABS module and HCU assembly. 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.