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Test D: LFC 15/DTC B1887 - Driver Air Bag Circuit Shorted to Ground
D1:
D1:
D2:
D3 - D4:
D5 - D6:
Normal Operation
The Restraints Control Module (RCM) checks for driver air bag circuit shorts to ground by monitoring the voltage of circuits 614 (GY/OG) and 615 (GY/WH) at pins 3 and 4. If the RCM detects a short to ground on either of these pins, it will store a Diagnostic Trouble Code (DTC) B1887 in memory and flash a Lamp Fault Code (LFC) 15 (or higher priority code if one exists) on the air bag indicator.
Possible Causes
A driver air bag circuit short to ground can be caused by:
^ a short to ground on circuit 614 (GY/OG).
^ a short to ground on circuit 615 (GY/WH).
^ a short to ground on the clockspring.
^ a short to ground on the driver air bag module.
^ an RCM internal concern.