Z: LFC 37/DTC B1997 - Passenger Air Bag Circuit Short to Ground

Normal Operation
The Restrains Control Module (RCM) monitors the resistance to ground at RCM C1 pins 5 and 6. If the resistance is less than 1000 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.

Pinpoint Test Steps:

Z1 - Z2:

Z3 - Z4:

Z5:

Z6 - Z7:

Z8: