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Home >> Ford >> 2023 >> Escape Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 496 (Abs Guided Routine) >> Pinpoint Tests >> Pinpoint Tests CI: The Trail Control Feature Is Inoperative, Cannot Be Enabled Or Disabled >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
  1. CI1: VERIFY CRUISE CONTROL OPERATION 
    • Test drive the vehicle to verify the cruise control system functions correctly.
    • Does the cruise control system operate correctly? 
      Yes No
      Go to  CI2. REFER to the Cruise Control article to diagnose the cruise control system.
  2. CI2: VERIFY PARKING BRAKE OPERATION 
    • Operate the parking brake system and verify it operates correctly.
    • Does the parking brake system operate correctly? 
      Yes No
      Go to  CI3. DIAGNOSE the parking brake system. REFER to the Parking Brake and Actuation article.
  3. CI3: CHECK THE ABS MODULE FOR DTCS 
    • Ignition ON, engine OFF.

      Carry out the ABS self-test.

    • Are any of the DTCs listed in the Fault Trigger Conditions Table present in the ABS module? 
      Yes No
      RETRIEVE and RECORD all ABS module DTCs.
      Go to  CI9.      		 For all other ABS module DTCs, GO to the ABS Module DTC Chart.
      If there are no DTCs present in the ABS module, Go to  CI4.
  4. CI4: CHECK FOR DTCS IN TRAIL CONTROL RELATED MODULES 
    • Ignition ON, engine OFF.

      Carry out the IPC self-test.

      Carry out the PCM KOEO self-test.

      Carry out the SCCM self-test.

    • Are there any DTCs present in any of the listed modules? 
      Yes No
      For IPC DTCs, REFER to the Instrumentaion, Message Center and Warning Chimes article.
      For PCM DTCs, REFER to the appropriate Electronic Engine Controls article.
      For SCCM DTCs, REFER to the Steering Wheel and Column Electrical Components article.      		 Go to  CI5.
  5. CI5: CHECK THE SWITCH FOR AN OPEN OR A SHORT 
  6. CI6: CHECK THE TRAIL CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN 
    • Measure the resistance between:
  7. CI7: CHECK THE TRAIL CONTROL SWITCH SIGNAL CIRCUIT FOR AN OPEN 
  8. CI8: CHECK THE TRAIL CONTROL SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
  9. CI9: CHECK THE BCM FOR DTCS 
    • Ignition ON, engine OFF.

      Carry out the BdyCM self-test.

    • Are any door ajar switch DTCs present in the BCM? 
      Yes No
      RETRIEVE and RECORD all BCM DTCs. REFER to the Multifunction Electronic Modules article. Go to  CI10.
  10. CI10: CHECK THE DRIVER DOOR SWITCH FOR AN OPEN OR A SHORT 
  11. CI11: CHECK THE DRIVER DOOR AJAR SWTICH GROUND CIRCUIT FOR AN OPEN 
    • Measure the resistance between:
  12. CI12: CHECK THE DRIVER DOOR AJAR SWTICH CIRCUIT FOR AN OPEN 
  13. CI13: CHECK THE DRIVER DOOR AJAR SWTICH CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
  14. CI14: CHECK THE DRIVER DOOR AJAR SWTICH CIRCUIT FOR A SHORT TO VOLTAGE 
    NOTE: This test step causes ABS related DTCs to set in other modules. These DTCs must be cleared once these diagnostics are complete.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
  15. CI15: VERIFY ALL WIRING CONNECTIONS 
    • 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  CI16. REPAIR the affected connectors or terminals. REFER to the Connector Repair procedures wiring diagrams article schematic and connector information.
  16. CI16: CHECK FOR CORRECT ABS MODULE OPERATION 
    • Ignition OFF.
  17. CI17: VERIFY ALL WIRING CONNECTIONS 
    • 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  CI18. REPAIR the affected connectors or terminals. REFER to the Connector Repair procedures wiring diagrams article schematic and connector information.
  18. CI18: CHECK FOR CORRECT IPC OPERATION 
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