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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Abs Guided Routine Testing - Pinpoint Tests D - ZA >> Abs Pinpoint Tests >> Pinpoint Tests OA: The Hill Descent Control System Is Inoperative Or Cannot Be Disabled

Pinpoint Tests OA: The Hill Descent Control System Is Inoperative Or Cannot Be Disabled

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
  1. OA1: CHECK FOR ABS MODULE DTCS 
    • Ignition ON, engine OFF.

    Carry out the ABS self-test.

    • Retrieve and record all ABS module DTCs.
    • Are there any "lost communication" or "invalid data" DTCs other than U0401:86 present in the ABS module? 
    Yes No
    DIAGNOSE all other ABS module "lost communication" and "invalid data" DTCs before continuing with this pinpoint test. REFER to the ABS module DTC Chart. Go to  OA7.
  2. OA2: VERIFY THE ATCM COMMUNICATES ON THE NETWORK 
    • Ignition ON, engine OFF.
    • Using a diagnostic scan tool, carry out the Network Test.
    • Does the ATCM pass the Network Test? 
    Yes No
    Go to  OA3. DIAGNOSE the ATCM does not respond to the scan tool. REFER to the Module Communications Network article.
  3. OA3: CHECK FOR ATCM DTCS 

    Carry out the ATCM self-test.

    • Are any DTCs present? 
    Yes No
    REFER to the appropriate Power Transfer Unit article. Go to  OA4.
  4. OA4: CHECK FOR ABS MODULE DTCS 
    • Review the recorded DTCs from Step OA1.
    • Is any U0138:xx or U0439:xx DTC present in the ABS module? 
    Yes No
    GO to PINPOINT TEST BM . Go to  OA5.
  5. OA5: VERIFY ALL WIRING CONNECTIONS 
    • Ignition OFF.
    • ATCM 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
    • Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals? 
    Yes No
    Go to  OA6. REPAIR the affected connectors or terminals. REFER to the Connector Repair Procedures Wiring Diagrams article for schematic and connector information.
  6. OA6: CHECK FOR CORRECT ATCM OPERATION 
    • ATCM connector connected. Make sure the connector seats and latches correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern is 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 ATCM. REFER to the appropriate Power Transfer Unit 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.
  7. OA7: CHECK FOR IPC DTCS 

    Carry out the IPC self-test.

    • Are there any DTCs in the IPC? 
    Yes No
    DIAGNOSE all IPC DTCs before diagnosing ABS module DTCs C1000:86 or U0401:86.
    REFER to the Instrumentation, Message Center and Warning Chimes article.    		 Go to  OA8.
  8. OA8: CHECK THE HILL DESCENT CONTROL SWITCH 
    • Ignition OFF.
    • Press and hold the Hill Descent Control switch while taking the measurement.
    • Measure the resistance between:
      (+) CSS Connector, Component Side (-) CSS Connector, Component Side
      HDC GND
    • Measure the resistance between:
      (+) Hazard Switch Connector, Component Side (-) Hazard Switch Connector, Component Side
      HDC GND
    • Measure the resistance between:
      (+) (-)
      HDC GND
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Middle Switch Connector, Component Side (-) Instrument Panel Center Stack Middle Switch Connector, Component Side
      HDC GND
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Right Switch Connector, Component Side (-) Instrument Panel Center Stack Right Switch Connector, Component Side
      HDC GND
    • Release the Hill Descent Control switch and take another measurement.
    • Measure the resistance between:
      (+) CSS Connector, Component Side (-) CSS Connector, Component Side
      HDC GND
    • Measure the resistance between:
      (+) Hazard Switch Connector, Component Side (-) Hazard Switch Connector, Component Side
      HDC GND
    • Measure the resistance between:
      (+) (-)
      HDC GND
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Middle Switch Connector, Component Side (-) Instrument Panel Center Stack Middle Switch Connector, Component Side
      HDC GND
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Right Switch Connector, Component Side (-) Instrument Panel Center Stack Right Switch Connector, Component Side
      HDC GND
    • Is the resistance less than 3 ohms with the switch pressed and greater than 10, 000 ohms with the switch released? 
    Yes No
    Go to  OA9. INSTALL a new CCS assembly.
    INSTALL a new CCS (the hill descent control switch is part of the CCS).
  9. OA9: CHECK THE HILL DESCENT CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN 
    • Measure the resistance between:
      (+) CSS Connector, Harness Side (-)
      GND Ground
    • Measure the resistance between:
      (+) Hazard Switch Connector, Harness Side (-)
      GND Ground
    • Measure the resistance between:
      (+) (-)
      GND Ground
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Middle Switch Connector, Harness Side (-)
      GND Ground
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Right Switch Connector, Harness Side (-)
      GND Ground
    • Is the resistance less than 3 ohms?
    Yes No
    Go to  OA10. REPAIR the circuit.
  10. OA10: CHECK THE HILL DESCENT CONTROL SWITCH SIGNAL CIRCUIT FOR AN OPEN 
    • IPC connector disconnected.
    • Measure the resistance between:
      (+) CSS Connector, Harness Side (-) IPC Connector, Harness Side
      HDC HDC
    • Measure the resistance between:
      (+) Hazard Switch Connector, Harness Side (-) IPC Connector, Harness Side
      HDC HDC
    • Measure the resistance between:
      (+) (-) IPC Connector, Harness Side
      HDC HDC
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Middle Switch Connector, Harness Side (-) IPC Connector, Harness Side
      HDC HDC
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Right Switch Connector, Harness Side (-) IPC Connector, Harness Side
      HDC HDC
    • Is the resistance less than 3 ohms?
    Yes No
    Go to  OA11. REPAIR the circuit.
  11. OA11: CHECK THE HILL DESCENT CONTROL SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
      (+) CSS Connector, Harness Side (-)
      HDC Ground
    • Measure the resistance between:
      (+) Hazard Switch Connector, Harness Side (-)
      HDC Ground
    • Measure the resistance between:
      (+) (-)
      HDC Ground
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Middle Switch Connector, Harness Side (-)
      HDC Ground
    • Measure the resistance between:
      (+) Instrument Panel Center Stack Right Switch Connector, Harness Side (-)
      HDC Ground
    • Is the resistance greater than 10, 000 ohms? 
    Yes No
    Go to  OA12. REPAIR the circuit.
  12. OA12: VERIFY ALL WIRING CONNECTIONS 
    • Ignition OFF.
    • 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  OA13. REPAIR the affected connectors or terminals.
    REFER to the Connector Repair Procedures wiring diagrams for schematic and connector information.
  13. OA13: CHECK FOR CORRECT IPC OPERATION 
    • IPC connector connected. Make sure the connector seats and latches correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern is 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 IPC. REFER to the Instrumentation, Message Center and Warning Chimes 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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