Test N: LFC 21/DTC B1925 - Air Bag Passenger Circuit Short to Battery

PINPOINT TEST N: LFC 21/DTC B1925 - AIR BAG PASSENGER CIRCUIT SHORT TO BATTERY

N1-N3:

N3-N5:

N6:

Normal Operation
The restraints control module (RCM) checks for passenger air bag circuit shorts to battery or ignition by monitoring the voltage of circuits 607 (LB/OG) and 616 (PK/BK) at RCM C310a pins 3 and 4. If the RCM detects a short to battery or ignition on either of these pins, it will store a diagnostic trouble code (DTC) B1925 in memory and flash a lamp fault code (LFC) 21 (or higher priority if one exists) on the air bag warning indicator.

Possible Causes
A passenger air bag circuit short to battery or ignition could be caused by:
- faulted wiring, terminals or connectors.
- a short to battery or ignition on the passenger air bag module.
- a faulted RCM.