Operation CHARM: Car repair manuals for everyone.

Test Z: LFC 37/DTC B1997 - Passenger Side Air Bag CKT Shorted to GND

Z1:






Z2:






Z3 - Z4:






Z5:






Z6 - Z8:






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 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.