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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 627 (Climate Control System - General Information (Diagnosis & Testing - General Procedures)) >> Diagnosis And Testing >> Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) >> Pinpoint Test(s) >> Pinpoint Test Ab: U0001:88

Pinpoint Test Ab: U0001:88

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to Wiring Diagrams AUTOMATIC CLIMATE CONTROL SYSTEM for schematic and connector information.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    ACCM U0001:88 High Speed CAN Communication Bus: Bus Off The module could not communicate on the network at a point in time. The fault is not currently present since the module had to communicate with the diagnostic scan tool to report this DTC.

    Possible Sources 

    • Intermittent fault with the CAN

  2. AB1 DIAGNOSE THE INTERMITTENT FAULT

    NOTE: The module was unable to communicate on the network at a point in time. The fault is not currently present since the module had to communicate with the diagnostic scan tool to report this Diagnostic Trouble Code (DTC).

    • Ignition ON.

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) for the module in question.

    • Wait at least 10 seconds.

    • Using a diagnostic scan tool, carry out the self-test for the module in question.

    • Verify the integrity of the connectors and wiring for the CAN.

    Is the DTC still present? 

    Yes  DIAGNOSE the CAN in question. REFER to: Controller Area Network (CAN) Module Communications Network .
    No  The system is operating correctly at this time. VERIFY the integrity of the connectors and wiring for the CAN in question.