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Home >> Lincoln >> 2021 >> Nautilus Base, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting - Description And Operation, Diagnosis And Testing >> Diagnosis And Testing >> Daytime Running Lamps (DRL) >> Pinpoint Tests >> Pinpoint Test A: The DRL (Daytime Running Lamps) Are Inoperative Or Always On

Pinpoint Test A: The DRL (Daytime Running Lamps) Are Inoperative Or Always On

  1. Refer to HEADLAMPS/AUTOLAMPS for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Exterior Lighting - Overview  . REFER to: Exterior Lighting - System Operation and Component Description  .

    Possible Sources 

    • Wiring, terminals or connectors
    • BCM

  2. A1 CHECK THE OPERATION OF THE PARKING LAMPS

    • Ignition ON.

    • Place the headlamp switch in the PARKING LAMPS position and observe the front parking lamps.

    • Place the headlamp switch in the OFF position and observe the headlamps.

    Do the parking lamps operate correctly? 

    Yes  If the LH or the RH front parking lamp Light Emitting Diodes (LEDs) are inoperative, GO to  A2 If the all front parking lamp Light Emitting Diodes (LEDs) are inoperative, GO to  A3
    No  REFER to: Parking, Rear and License Plate Lamps .

  3. A2 CHECK THE ADAPTIVE FRONT LIGHTING MODULE

    • Ignition OFF.

    • REMOVE the suspect adaptive front lighting module.

    • Substitute the known good adaptive front lighting module from the opposite headlamp.

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the BCMLIN New Module Initialization.

    • CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. TEST the system for normal operation.

    Does the suspect daytime running lamp operate? 

    Yes  REMOVE the known good adaptive front lighting module. INSTALL a new adaptive front lighting module. REFER to: Adaptive Front Lighting Module .
    No  REMOVE the known good adaptive front lighting module. INSTALL a new headlamp assembly. REFER to: Headlamp Assembly .

  4. A3 CHECK THAT THE DRL (DAYTIME RUNNING LAMPS) ARE ENABLED

    • For conventional DRL, check if the DRL are enabled through a diagnostic scan tool.

    • For configurable DRL, check if the DRL are enabled through the IPC.

    Are the DRL enabled? 

    Yes  GO to  A4
    No  For conventional DRL, Using a diagnostic scan tool, ENABLE the DRL. For configurable DRL, ENABLE the DRL. REFER to the Owner's Literature for information on enabling the DRL.

  5. A4 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Disconnect and inspect all BCM connectors.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the BCM connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable 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 BCM. Refer to the appropriate Removal and Installation procedure in REMOVAL AND INSTALLATION
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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