Ford Fiesta Manuals

Ford Fiesta: Exterior Lighting / Daytime Running Lamps (DRL). Diagnosis and Testing

Ford Fiesta 2014 - 2019 Service Manual / Lighting / Exterior Lighting / Daytime Running Lamps (DRL). Diagnosis and Testing

Symptom Chart(s)

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Symptom Chart: DRL

  Symptom Chart


Condition Possible Sources Actions
A module does not respond to the diagnostic scan tool
  • Fuse
  • Wiring, terminals or connectors
  • Module
 
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
The DRL are inoperative Refer to the Pinpoint Test   GO to Pinpoint Test A

Pinpoint Tests

The DRL Are Inoperative

Normal Operation and Fault Conditions


REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

Possible Sources

  • Wiring, terminals or connectors
  • Ignition switch
  • BCM

Visual Inspection and Diagnostic Pre-checks

  • Inspect the multifunction switch for damage.

PINPOINT TEST A: THE DRL (DAYTIME RUNNING LAMPS) ARE INOPERATIVE
A1 CHECK THE OPERATION OF THE HEADLAMPS
  • Ignition OFF.
  • Place the headlamp switch in the headlamps on position.

Do the headlamps operate correctly?
Yes GO to A2
No DIAGNOSE the low beam headlamps.
REFER to: Headlamps (417-01 Exterior Lighting, Diagnosis and Testing).

A2 CHECK THE IGNITION SWITCH PID (PARAMETER IDENTIFICATION)
  • Ignition ON.
  • Using a diagnostic scan tool, view BCM Parameter Identifications (PIDs).
  • Monitor the BCM IGN_SW_RUN PID while cycling the ignition ON and OFF.

Does the ignition switch PID value agree with the ignition state?
Yes GO to A3
No
REFER to: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing).

A3 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, 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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