W: LFC 36/DTC B1992 - Driver Air Bag Ckt Short to Batt/Ignition

Normal Operation
The Restraints Control Module (RCM) monitors the driver side air bag circuits at RCM C1 pins 2 and 3 for a short to battery or ignition. If battery or ignition voltage is detected, the RCM will store Diagnostic Trouble Code (DTC) B1992 and flash Lamp Fault Code (LFC) 36.

Possible Causes
A driver side air bag circuit short to battery or ignition can be caused by:
- battery or ignition voltage on circuit 1257 (WH/LB).
- battery or ignition voltage on circuit 1258 (BN/LB).
- battery or ignition voltage short in the driver side air bag.
- an RCM internal concern.

Pinpoint Test Steps:

W1 - W2:

W3 - W4:

W5:

W6 - W7:

W8: