F 350 2WD Super Duty V10-6.8L (2009)
Daytime Running Lamp: Initial Inspection and Diagnostic Overview
Special Tools Used With Diagnostics
Daytime Running Lamps (DRL)
Inspection and Verification
Daytime Running Lamps (DRL)
Inspection and Verification
1. Verify the customer concern.
2. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
NOTE: Make sure the headlamp switch is in the OFF position.
NOTE: Make sure the multifunction switch is not in the HIGH BEAM position.
3. NOTE: Make sure to use the latest scan tool software release.
If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
4. NOTE: The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM:
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Check the VCM connection to the vehicle.
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Check the scan tool connection to the VCM.
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Refer to Information Bus, No Power To The Scan Tool, to diagnose no power to the scan tool.
5. If the scan tool does not communicate with the vehicle:
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Verify the ignition key is in the ON position.
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Verify the scan tool operation with a known good vehicle.
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Refer to Information Bus to diagnose no response from the PCM.
6. Carry out the network test.
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If the scan tool responds with no communication for one or more modules, refer to Information Bus.
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If the network test passes, retrieve and record the continuous memory DTCs.
7. Check the Smart Junction Box (SJB) and make sure the Daytime Running Lamps (DRL) configuration is enabled.
8. For vehicles with a manual transmission, check the operation of the brake warning indicator by applying and releasing the parking brake.
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If the brake warning indicator does not operate correctly, refer to Instrument Panel, Gauges and Warning Indicators.
9. For vehicles with an automatic transmission, check the operation of the PRNDL display by placing the gear selector lever in each of its positions.
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If the PRNDL display does not operate correctly, refer to Instrument Panel, Gauges and Warning Indicators.
