Test Q

PINPOINT TEST Q: LFC 36/DTC B1993 - DRIVER SIDE AIR BAG CIRCUIT SHORTED TO GROUND

Test Q1:

Test Q2:

Test Q3-Q4:

Test Q5-Q6:

Normal Operation
The restraints control module (RCM) monitors the resistance to ground at RCM C1 pins 2 and 3. 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) B1993 and flash lamp fault code (LFC) 36.

Possible Causes
A driver side air bag circuit short to ground can be caused by:
- grounded wiring on circuit 1257 (WH/LB).
- damaged wiring on circuit 1258 (BN/LB).
- ground short in the driver side air bag module.
- an RCM internal concern.