DTC B1913 - Air Bag Circuit Short To Ground: Description

The air bag diagnostic monitor measures voltage at terminal C276-2, C276-3, C276-4, and C276-5 of air bag diagnostic monitor connector. Voltage at these terminals are set by diagnostic monitor and vary with charging system voltage. If air bag diagnostic monitor detects low voltage at any of these terminals, DTC B1913 will be stored in memory and AIR BAG warning light will flash Code 13 to indicate possible short to ground on these circuits.

At the same time air bag diagnostic monitor begins flashing Code 13, it attempts to disarm SRS to prevent inadvertent air bag deployment by opening fuse No. 16 (10A) feeding air bag diagnostic monitor terminal C276-13 and C276-14. It attempts to open fuse by activating solid state switch which shorts battery feed at terminal C276-13, circuit 609 (Orange/Yellow) to sheet metal ground at air bag diagnostic monitor bracket.