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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 434 (Exterior Lighting System) >> Diagnosis And Testing >> Daytime Running Lamps (DRL) >> Pinpoint Tests >> Pinpoint Test Z: The Daytime Running Lamps (DRL) Are Inoperative >> Pinpoint Test Z: The DRL Are Inoperative

Pinpoint Test Z: The DRL Are Inoperative

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
  1. Z1 VERIFY THE DRL OPERATION 
    • Ignition ON.
    • Place the headlamp switch in the OFF position.
    • If equipped with an automatic transmission, place the gear selector lever in any gear other than PARK (P).
    • If equipped with a manual transmission, release the parking brake.
    • Are the DRL illuminated? 
    • Yes  : The system is operating correctly. INFORM the customer of the conditions required for the DRL to operate correctly.
    • No  : IGO to Z2.
  2. Z2 CHECK THE OPERATION OF THE FOG LAMPS 
    • Place the headlamp switch in the PARKING LAMPS ON position and engage the fog lamp switch.
    • Do the fog lamps operate correctly? 
    • Yes  : GO to Z3.
    • No  : REFER to FOG LAMPS .
  3. Z3 CHECK THE IGNITION SWITCH INPUT 
    • Place the headlamp switch in the OFF position.
    • Enter the following diagnostic mode on the scan tool: SJB DataLogger.
    • Monitor the SJB ignition switch PIDs (IGN_A_ECU, IGN_O_ECU, IGN_R_ECU, IGN_S_ECU) while cycling the ignition switch through all positions.
    • Does the PID agree with the ignition switch positions? 
    • Yes  : For vehicles with an automatic transmission, GO to Z4.

      For vehicles with a manual transmission, GO to  Z5.

    • No  : REFER to STEERING COLUMN SWITCHES to diagnose the input from the ignition switch.
  4. Z4 CHECK THE TRANSMISSION GEAR INPUT 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: PCM DataLogger.
    • Monitor the PCM transmission gear status PID (TR) while placing the gear selector lever through all positions.
    • Does the PID agree with the gear selection? 
  5. Z5 CHECK THE BRAKE WARNING INDICATOR OPERATION 
    • Ignition ON.
    • Apply and release the parking brake while observing the brake warning indicator.
    • Does the brake warning indicator operate correctly? 
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