Test Q: Air Bag Warning Light Circuit Short To Battery (DTC B1870): Description

AIR BAG warning light is designed to illuminate for 6 seconds when ignition switch is turned to RUN position. The initial 6 second illumination is normal and is call prove-out. AIR BAG warning light is then used to warn vehicle operator that there is a fault in air bag system.

Restraints Control Module (RCM) monitors AIR BAG warning light for short to battery voltage conditions. If RCM detects short to battery voltage in AIR BAG warning light circuit, it will store Diagnostic Trouble Code (DTC) 1870 in memory. If RCM detects AIR BAG warning light failure in addition to another air bag system failure, it will send signal to Generic Electronic Module (GEM) module to produce 5 sets of 5 tone bursts.