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Pinpoint Test A : DTC U300D:11

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

  1. A1 CHECK THE TCCM IGNITION POSITION (KEY_POS_4X4) AND IGNITION STATUS (KEY_STATUS_4X4) PIDs

    • Enter the following diagnostic mode on the scan tool: TCCM DataLogger.
    • Monitor the ignition position KEY_POS_4X4 and KEY_STATUS_4X4 PIDs while cycling through each position.

    Do the ignition PIDs match the ignition switch positions? 

    Yes  The system is functioning correctly. CLEAR the DTCs. REPEAT the self-test.
    No  If the KEY_STATUS_4X4 PID did not match, CHECK BCM fuse 37 (10A). If the fuse is OK, REPAIR the circuit. If the fuse is not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short. After the fault is repaired, CLEAR the DTCs. If the KEY_POS_4X4 PID did not match, REFER to Steering Column Switches to diagnose the ignition switch. After the fault is repaired, CLEAR the DTCs.
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