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Home >> Ford >> 2004 >> Excursion 2WD V10-6.8L VIN S >> Repair and Diagnosis >> Restraints and Safety Systems >> Air Bag Systems >> Testing and Inspection >> Pinpoint Tests >> Test F
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Test F

PINPOINT TEST F: LFC 17/DTC B1878 - DRIVER PRETENSIONER CIRCUIT SHORTED TO BATTERY OR IGNITION


Test F1-F3:






Test F3-F4:






Test F5:






Normal Operation
The restraints control module (RCM) monitors the circuit to the driver safety belt pretensioner. When the RCM detects a circuit short to battery or ignition it will set lamp fault code (LFC) 17 and diagnostic test code (DTC) B1878.

Possible Causes
A short to battery or ignition on the driver safety belt pretensioner circuit can be caused by:
- a short to battery or ignition on circuit 1079 (LG/RD).
- a short to battery or ignition on circuit 1080 (LG/BK).
- a short to battery or ignition on the driver belt pretensioner.
- an RCM internal concern.
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