Test W: LFC 36/DTC B1992 or B1993 - Driver Side Air Bag CKT Short to Battery/Ground

W1:

W2:

W3:

W4 - W5:

W6:

Normal Operation
The Restraints Control Module (RCM) checks for driver side air bag circuit shorts to battery and ground by monitoring circuits 1257 (WH/LB) and 1258 (BN/LB) at RCM C310b pins 3 and 4. If the RCM detects a short to battery or ground on either of these pins, it will store Diagnostic Trouble Code (DTC) B1992 or B1993 in memory and flash Lamp Fault Code (LFC) 36 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
A driver side air bag circuit short to battery or ground can be caused by:
^ a short to battery or ground on circuit 1257 (WH/LB) or 1258 (BN/LB).
^ a short to battery or ground in the driver side air bag module.
^ an RCM internal fault.