Test U

PINPOINT TEST U: LFC 37/DTC B1997 - PASSENGER SIDE AIR BAG CIRCUIT SHORTED TO GROUND

Test U1-U2:

Test U3-U4:

Test U5-U6:

Normal Operation
The restraints control module (RCM) monitors the resistance to ground at RCM C1 pins 5 and 6. If the resistance is less than 10,000 ohms at either pin, the RCM will interpret that as a ground short, store diagnostic trouble code (DTC) B1997 and flash lamp fault code (LFC) 37.

Possible Causes
A passenger side air bag circuit short to ground can be caused by:
- grounded wiring on circuit 1259 (WH/YE).
- damaged wiring on circuit 1260 (BN/YE).
- ground short in the passenger side air bag module.
- an RCM internal concern.