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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 833 (Exterior Lighting System) >> Diagnosis And Testing >> Daytime Running Lamps (DRL) - Expedition >> Pinpoint Tests >> PINPOINT TEST C : The DRL Are Inoperative >> PINPOINT TEST C : The DRL Are Inoperative

PINPOINT TEST C : The DRL Are Inoperative

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. C1 CHECK THE OPERATION OF THE HEADLAMPS

    • Ignition OFF.
    • Place the headlamp switch in the HEADLAMPS position.

    Do the headlamps operate correctly? 

    Yes  GO to  C2
    No  REFER to Headlamps - Expedition .

  2. C2 VERIFY THE DRL OPERATION

    • Ignition ON.
    • Place the headlamp switch in the OFF position.
    • Place the gear selector lever in any gear other than PARK (P).

    Are the DRL illuminated? 

    Yes  The system is operating correctly. INFORM the customer of the conditions required for the DRL to operate correctly.
    No  GO to  C3

  3. C3 CHECK THE TRANSMISSION GEAR INPUT

    • Using a diagnostic scan tool, view the PCM PIDs.
    • Monitor the PCM Transmission Range (TR) PID while placing the gear selector lever through all its positions.

    Does the PID agree with the gear selection? 

    Yes  BCM Hardware Testing .
    No  REFER to Automatic Transmission External Controls to diagnose the transmission range input.
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