Driver-Side Air Bag Circuit Shorted to Battery or Ignition

Pinpoint Test 16: LFC 36/DTC B1992 - DRIVER-SIDE AIR BAG CIRCUIT SHORTED TO BATTERY OR IGNITION

Normal Operation
The restraints control module (RCM) monitors the driver-side air bag circuits at RCM S-2041a and S-2041b, 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 (W/LB).
- battery or ignition voltage on circuit (BR/LB).
- battery or ignition voltage short in the driver-side air bag.
- an RCM internal concern.

WARNING: If the supplemental restraint system (SRS) is being serviced, the system must be deactivated and restraint system diagnostic tools must be installed.

The air bag restraint system diagnostic tools must be removed and the air bag modules reconnected when the system is reactivated to avoid non-deployment in a collision, resulting in possible personal injury.

NOTE: Diagnostics or repairs are not to be performed on a seat equipped with a seat side air bag with the seat in the vehicle. Prior to attempting to diagnose or repair a seat concern when equipped with a seat side air bag, the seat must be removed from the vehicle and the restraint system diagnostic tools must be installed in the seat side air bag electrical connectors. The restraint system diagnostic tools must be removed prior to operating the vehicle over the road.

NOTE: After diagnosing or repairing an SRS, the restraint system diagnostic tools must be removed before operating the vehicle over the road.

NOTE: After diagnosing or repairing a seat system, the restraint system diagnostic tools must be removed before operating the vehicle over the road.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

Step 1:

Step 2 - 3:

Step 5 - 6: