Test U: Air Bag Warning Light Inoperative (DTC B1869): Description

AIR BAG warning light is designed to illuminate for 4-8 seconds when ignition switch is turned to RUN position. The initial 4-8 second illumination is normal and is call prove-out. The AIR BAG warning light is then used to warn vehicle operator that there is a fault in the air bag system.

ECS monitors AIR BAG warning light for open and short to ground conditions. If ECS detects open or short to ground in AIR BAG warning light circuit, it will store DTC 1869 in memory. If ECS detects AIR BAG warning light failure in addition to another air bag system failure, it will send signal to Generic Electronic Module (GEM) to produce 5 sets of 5 tone bursts.