Test O: Passenger Air Bag Deactivation (Pad) Switch Fault (DTC B1871): Description

ECS monitors status of Passenger Air Bag Deactivation (PAD) switch at terminal No. 9 (White/Light Blue wire). PAD switch signals ECS by switching resistance to ground. If ECS senses 900-1100 ohms in PAD switch, it enables passenger-side air bag and turns off PAD switch warning light. If ECS senses 400-600 ohms in PAD switch, it deactivates passenger-side air bag and turns on PAD switch warning light. If ECS senses an invalid resistance, it will store DTC B1871 in memory and flash Code 25 on AIR BAG warning light.